Form 485BPOS UBS FUNDS

Article

October 23, 2018 2:10 PM EDT

E-mail

As filed with the U.S. Securities and Exchange Commission on October 23, 2018

File No. 033-47287

File No. 811-06637

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No.	o
Post-Effective Amendment No. 134	x

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 135

(Check appropriate box or boxes.)

THE UBS FUNDS

(Exact Name of Registrant as Specified in Charter)

One North Wacker, Chicago, Illinois 60606

(Address of Principal Executive Office) (Zip Code)

Registrant’s Telephone Number, including Area Code 312-525-7100

Mark F. Kemper

UBS Asset Management (Americas) Inc.

One North Wacker

Chicago, Illinois 60606

(Name and Address of Agent for Service)

Please send copies of all communications to:

Bruce G. Leto, Esq.

Stradley Ronon Stevens & Young, LLP

2600 One Commerce Square

Philadelphia, PA 19103

(215) 564-8027

Approximate Date of Proposed Public Offering: As soon as practicable after the effective date of this registration statement.

It is proposed that this filing will become effective (check appropriate box):

x	immediately upon filing pursuant to paragraph (b)
o	on [Date] pursuant to paragraph (b)
o	60 days after filing pursuant to paragraph (a)(1)
o	on [Date] pursuant to paragraph (a)(1)
o	75 days after filing pursuant to paragraph (a)(2)
o	on [Date] pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

o	This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Explanatory Note: This Post-Effective Amendment relates only to the UBS Engage For Impact Fund and UBS Sustainable Development Bank Bond Fund. No other information relating to any other series of the Registrant is amended or superseded hereby.

The UBS Funds

Prospectus | October 23, 2018

Includes:

• UBS Engage For Impact Fund
Class: A: UEIAX, P: UEIPX

• UBS Sustainable Development Bank Bond Fund
Class: A: UDBAX, P: UDBPX

This prospectus offers Class A and Class P shares in two of the series of The UBS Funds (the "Trust") listed above (each, a "Fund" and collectively, the "Funds").

As with all mutual funds, the US Securities and Exchange Commission ("SEC") has not approved or disapproved any Fund's shares or determined whether this prospectus is complete or accurate. To state otherwise is a crime.

Not FDIC Insured. May lose value. No bank guarantee.

Contents

The UBS Funds

What every investor should know about the funds

	Page
Fund summaries
• UBS Engage For Impact Fund		3
• UBS Sustainable Development Bank Bond Fund		7
More information about the funds
• UBS Engage For Impact Fund—Investment objective, strategies, securities selection and risks		11
• UBS Sustainable Development Bank Bond Fund—Investment objective, strategies, securities selection and risks		16
Your investment
Information for managing your fund account
• Flexible pricing		20
• Buying shares		24
• Selling shares		28
• Exchanging shares		29
• Pricing and valuation		30
Additional information
• Management		32
• Disclosure of portfolio holdings		34
• Dividends and taxes		34
• Financial highlights		37
• Appendix A		A-1
• Where to learn more about the funds		Back Cover

Please find the UBS family of funds privacy notice on page 38 of this prospectus.

Please find the UBS Asset Management business continuity planning overview on page 39 of this prospectus.

The funds are not a complete or balanced investment program.

UBS Engage For Impact Fund
Fund Summary

Investment objective

The Fund seeks to maximize total return, consisting of capital appreciation and current income.

Fees and expenses

These tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for a sales charge waiver or discount if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" beginning on page 20 of this prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" beginning on page 62 of the Fund's statement of additional information ("SAI").

Different intermediaries and financial professionals may make available different sales charge waivers or discounts. These variations are described in Appendix A beginning on page A-1 of this prospectus.

Shareholder fees (fees paid directly from your investment)

	Class A			Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of offering price)		5.50	%		None
Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)		None¹			None

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class P
Management fees		0.75	%		0.75	%
Distribution and/or service (12b-1) fees		0.25			None
Other expenses²		0.44			0.44
Total annual fund operating expenses		1.44			1.19
Less management fee waiver/expense reimbursements³		0.34			0.34
Total annual fund operating expenses after management fee waiver/expense reimbursements³		1.10			0.85

¹ Purchases of $1 million or more that were not subject to a front-end sales charge are subject to a 1% CDSC if sold within one year of the purchase date.

² "Other expenses" are based on estimates for the current fiscal year.

³ The Trust, with respect to the Fund, and UBS Asset Management (Americas) Inc., the Fund's investment advisor and administrator ("UBS AM (Americas)" or the "Advisor"), have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) to the extent necessary so that the Fund's ordinary operating expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses), through the period ending October 29, 2019, do not exceed 1.10% for Class A shares and 0.85% for Class P shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses to the extent such reimbursement can be made during the three fiscal years following the date on which such fee waivers and expense reimbursements were made, provided that the reimbursement of the Advisor by the Fund will not cause the Fund to exceed the lesser of any applicable expense limit that is in place for the Fund (i) at the time of the waiver or reimbursement or (ii) at the time of the recoupment. The fee waiver/expense reimbursement agreement may be terminated by the Fund's Board of Trustees at any time and also will terminate automatically upon the expiration or termination of the Fund's advisory contract with the Advisor. Upon termination of the fee waiver/expense reimbursement agreement, however, UBS AM (Americas)'s three year recoupment rights will survive.

Example

same. The costs described in the example reflect the expenses of the Fund that would result from the contractual fee waiver and expense reimbursement agreement with the Advisor for the first year only. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

	1 year		3 years
Class A	$	656	$	949
Class P		87		344

Portfolio turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. Because the Fund had not yet commenced operations as of the date of this prospectus, it does not have a portfolio turnover rate to provide.

Principal strategies
Principal investments

To achieve its investment objective, the Fund invests in, or seeks exposure to companies based on various financial factors, fundamental sustainability factors such as environmental, social and governance performance along with assessing the current and potential ability of such companies to have a measurable impact on society and the environment.

Under normal circumstances, the Fund invests a substantial portion of its net assets (plus borrowings for investment purposes, if any) in equity securities. Investments in equity securities may include, but are not limited to, dividend-paying securities, common stock and preferred stock of issuers located throughout the world; Global, European and American Depositary Receipts; as well as investment companies, including exchange-traded funds ("ETFs"). The Fund may invest in issuers from both developed markets (including the United States) and emerging markets. The Advisor, on behalf of the Fund, intends to diversify broadly among countries, but reserves the right to invest a substantial portion of the Fund's assets in one or more countries if economic and business conditions warrant such investments. The Fund may invest in stocks of companies of any size.

The Fund may, but is not required to, use exchange traded or over-the-counter ("OTC") derivative instruments for risk management purposes or as part of the Fund's investment strategies. Generally, derivatives are financial contracts whose value depends upon, or is derived from, the value of an underlying asset, reference rate, index or other market factor and may relate to stocks, bonds, interest rates, credit, currencies or

currency exchange rates, commodities and related indexes. The derivatives in which the Fund may invest include futures, forward currency agreements and equity participation notes. All of these derivatives may be used for risk management purposes to manage or adjust the risk profile of the Fund. Futures on currencies and forward currency agreements may also be used to hedge against a specific currency. In addition, all of the derivative instruments listed above may be used for investment (non-hedging) purposes to earn income; to enhance returns; to replace more traditional direct investments (except for forward currency agreements); or to obtain exposure to certain markets (except for forward currency agreements). The Fund also may use futures contracts on equity securities and indices to gain market exposure on its uninvested cash.

Management process

The Advisor seeks to invest in companies that the Advisor believes are attractively valued, that integrate sustainability factors into the business model to build a competitive advantage, whose products and services can create meaningful, intentional, verifiable and measurable impact on society and the environment; and which have a clearly identified potential for additional positive impact that the Advisor intends to drive through engagement with the companies. In selecting individual securities for investment, the Advisor considers, among other factors:

• Its assessment of fundamental valuation (price/intrinsic value) to seek attractively valued companies with strong financial performance;

• Quantitative and qualitative environmental, social and governance ("ESG") factors;

• Quantitative and qualitative assessment of a company's current and potential impact on society and the environment; and

• Advisor's ability to drive positive change in a company's impact profile through engagement.

The Advisor aims to identify the best investment ideas with additional impact potential across the market capitalization spectrum, sectors and geographies within the eligible investment universe ("the impact universe").

fields of earth sciences and public health science. The impact of portfolio holdings is measured in changes in human well-being and changes in environmental quality (e.g. reduction in air pollution, hospitalizations and biodiversity loss).

Engagement with portfolio companies is a key aspect of the Fund's strategy. Companies have the potential to create additional impact through improving or optimizing the use of their products and services throughout society as well as indirectly through changes to their operations and supply chain. The Advisor's Global Sustainable Equities team and the Sustainable Research staff will seek to increase impact at each portfolio company through engagement on both fronts through communication with company management and continuous monitoring of the company's ESG impact. The Advisor will establish specific impact goals, and measure and evaluate progress regularly in order to assess the impact of its engagement efforts. The purpose of engagement with companies is to:

• Improve the Advisor's ability to independently measure impact;

• Engage the company to help it inform its strategy with regard to societal goals;

• Engage the company to help increase its product and service impact by identifying target markets, customers and business partners that create additional impact over time; and

• Engage the company to identify business model risks and opportunities linked to the ESG component of operations, supply chains and other aspects of the company that can help increase positive impact over time.

The Advisor will employ both a positive and negative screening process with regard to securities selection for the Fund. The negative screening process will exclude securities of companies with more than 5% of sales in alcohol, tobacco, defense, nuclear, gambling and pornography from the Fund's portfolio. The Advisor may modify this list of negative screens at any time, without shareholder approval or notice. The positive screening process seeks to identify securities of companies that provide solutions to significant global challenges through the impact of their products and services, that are attractive based on their fundamental and valuation profile in addition to evaluating specific sustainability (ESG) factors as well as the ability of the Advisor to engage with the company's management on impact-related issues.

Main risks

All investments carry a certain amount of risk, and the Fund cannot guarantee that it will achieve its invest-

ment objective. You may lose money by investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Below are some of the specific risks of investing in the Fund.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. It is possible for the Fund to lose more than the amount it invested in the derivative. The risks of investing in derivative instruments also include market risk, management risk, counterparty risk (which is the risk that a counterparty to a derivative contract is unable or unwilling to meet its financial obligations) and the risk that changes in the value of a derivative may not correlate perfectly with the underlying asset, rate, index or overall market securities. In addition, non-exchange traded derivatives may be subject to liquidity risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

Emerging market risk: There are additional risks inherent in investing in less developed countries that are applicable to the Fund. Compared to the United States and other developed countries, investments in emerging market issuers may decline in value because of unfavorable foreign government actions, greater risks of political instability or the absence of accurate information about emerging market issuers. Further, emerging countries may have economies based on only a few industries and securities markets that trade only a small number of securities and employ settlement procedures different from those used in the United States. Prices on these exchanges tend to be volatile and, in the past, securities in these countries have offered greater potential for gain (as well as loss) than securities of companies located in developed countries. Further, investments by foreign investors are subject to a variety of restrictions in many emerging countries. Countries such as those in which the Fund may invest may experience, high rates of inflation, high interest rates, exchange rate fluctuations or currency depreciation, large amounts of external debt, balance of payments and trade difficulties and extreme poverty and unemployment.

Foreign investing risk: The value of the Fund's investments in foreign securities may fall due to adverse political, social and economic developments abroad and due to decreases in foreign currency values relative to the US dollar. Investments in foreign government bonds involve special risks because the Fund may have limited legal recourse in the event of default. Also, foreign securities are sometimes less liquid and more difficult to sell and to value than securities of US issuers. These risks are greater for investments in emerging market issuers.

Geographic concentration risk: The risk that if the Fund has most of its investments in a single country or region, its portfolio will be more susceptible to factors adversely affecting issuers located in that country or region than would a more geographically diverse portfolio of securities.

Investing in ETFs risk: The Fund's investment in ETFs may subject the Fund to additional risks than if the Fund would have invested directly in the ETF's underlying securities. These risks include the possibility that an ETF may experience a lack of liquidity that can result in greater volatility than its underlying securities; an ETF may trade at a premium or discount to its net asset value; or an ETF may not replicate exactly the performance of the benchmark index it seeks to track. In addition, investing in an ETF may also be more costly than if a Fund had owned the underlying securities directly. The Fund, and indirectly, shareholders of the Fund, bear a proportionate share of the ETF's expenses, which include management and advisory fees and other expenses. In addition, the Fund will pay brokerage commissions in connection with the purchase and sale.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the Fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the Fund that exceed the amount originally invested.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the Advisor may not produce the desired results.

Market risk: The market value of the Fund's investments may fluctuate, sometimes rapidly or unpredictably, as the stock and bond markets fluctuate. Market risk may affect a single issuer, industry, or sector of the economy, or it may affect the market as a whole.

Small- and mid-capitalization risk: The risk that securities of smaller capitalization companies tend to be more volatile and less liquid than securities of larger capitalization companies. This can have a disproportionate effect on the market price of smaller capitalization companies and affect the Fund's ability to purchase or sell these securities. In general, smaller capitalization companies are more vulnerable than larger companies to adverse business or economic developments and they may have more limited resources.

Sustainability factor risk and risk of impact investing: The Fund's sustainability factors used in its investment process and the Advisor's impact investing approach will likely make the Fund perform differently from a fund that relies solely or primarily on financial

metrics. The sustainability factors and the Advisor's impact investing approach may cause the Fund's industry allocation to deviate from that of funds without these considerations.

Performance

There is no performance information quoted for the Fund as the Fund had not commenced investment operations as of the date of this prospectus.

Investment advisor

UBS Asset Management (Americas) Inc. serves as the investment advisor to the Fund.

Portfolio managers

• Bruno Bertocci, portfolio manager of the Fund since its inception.

• Joseph Elegante, portfolio manager of the Fund since its inception.

Purchase & sale of Fund shares

You may purchase, redeem or exchange shares of the Fund on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange Class A and P shares of the Fund either through a financial advisor or directly from the Fund. In general, the minimum initial investment for Class A shares is $1,000, and the minimum subsequent investment is $100; and the minimum investment for Class P shares is $5 million ($1,000 for investors who are clients of wrap fee advisory programs (with a minimum subsequent investment of $100)).

Tax information

The dividends and distributions you receive from the Fund are taxable and generally will be taxed as ordinary income, capital gains, or some combination of both, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an individual retirement account, in which case your distributions may be taxed as ordinary income when withdrawn from the tax-advantaged account.

Payments to broker-dealers and other financial intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your financial advisor to recommend the Fund over another investment. Ask your financial advisor or visit your financial intermediary's Web site for more information.

UBS Sustainable Development Bank Bond Fund
Fund Summary

Investment objective

The Fund seeks current income.

Fees and expenses

These tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.

Shareholder fees (fees paid directly from your investment)

	Class A		Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of offering price)		None		None
Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)		None¹		None

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class P
Management fees		0.15	%		0.15	%
Distribution and/or service (12b-1) fees		0.10			None
Other expenses²		0.48			0.48
Total annual fund operating expenses		0.73			0.63
Less management fee waiver/expense reimbursements³		0.38			0.38
Total annual fund operating expenses after management fee waiver/expense reimbursements³		0.35			0.25

¹ Shares of the Fund acquired through the exchange of shares of another Family Fund ("Family Funds" include PACE^® Select funds, series of The UBS Funds and other funds for which UBS AM (US) serves as principal underwriter) may be subject to a deferred sales charge if you later sell the Fund shares acquired in the exchange, based on the terms of the shares of the Family Fund you originally held.

² "Other expenses" are based on estimates for the current fiscal year.

on which such fee waivers and expense reimbursements were made, provided that the reimbursement of the Advisor by the Fund will not cause the Fund to exceed the lesser of any applicable expense limit that is in place for the Fund (i) at the time of the waiver or reimbursement or (ii) at the time of the recoupment. The fee waiver/expense reimbursement agreement may be terminated by the Fund's Board of Trustees at any time and also will terminate automatically upon the expiration or termination of the Fund's advisory contract with the Advisor. Upon termination of the fee waiver/expense reimbursement agreement, however, UBS AM (Americas)'s three year recoupment rights will survive.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell all of your shares at the end of those periods unless otherwise stated. The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The costs described in the example reflect the expenses of the Fund that would result from the contractual fee waiver and expense reimbursement agreement with the Advisor for the first year only. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

	1 year		3 years
Class A	$	36	$	195
Class P		26		163

Portfolio turnover

Principal strategies
Principal investments

Under normal circumstances, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes, if any) in bonds and/or instruments that provide exposure to bonds issued by development banks. Development banks are financial organizations formed by government entities to promote economic and social development. The Fund invests in multilateral development bank bonds but may also invest in regional or national development bank obligations. The Fund's investment in obligations issued by the International Bank for Reconstruction and Development and the Inter-American Development Bank may be significant, but the Fund normally will not invest more than 25% of its net assets in either issuer.

Under normal circumstances, the Fund will invest in securities that, at the time of purchase, possess a minimum rating of A3 by Moody's Investors Service, Inc. ("Moody's") or A- by Standard & Poor's Financial Services LLC ("S&P") or Fitch Ratings, Inc. ("Fitch"), comparably rated by another nationally recognized statistical rating organization, or, if unrated, are determined by the Advisor to be of comparable quality.

The Fund's investments in fixed income securities may have all types of interest rate payment and reset terms. The Fund generally invests only in US dollar-denominated securities.

The Fund may, but is not required to, engage in derivatives transactions. Derivatives instruments such as futures may be used for risk management purposes to hedge against a specific security or for investment (non-hedging) purposes to earn or adjust portfolio duration. The Fund does not seek to use derivatives extensively.

The Fund is a non-diversified fund.

Management process

The Advisor seeks to invest in bonds issued by development banks. The Advisor constructs the portfolio consisting of multilateral and regional development banks. The Advisor focuses primarily on bonds issued by multilateral development banks which may include, but are not limited to, the World Bank, International Bank for Reconstruction and Development, the Inter-American Development Bank, the Asian Development Bank, the African Development Bank, and the European Bank for Reconstruction and Development. Development banks are formed by their member states with the objective to provide financial and technical assistance to improve overall living standards through sustainable economic development and growth. While each development bank has a distinct focus, development banks generally use their capital for projects that seek to improve the state of the developing world, promote sustainable growth and raise living standards.

The Advisor selects investments for the Fund based on available supply and liquidity parameters (including, for example, such factors as evaluating amounts outstanding, available dealer inventory, and volumes traded in the secondary market) utilizing a stratified sampling approach (investing in a representative cross-section of the investment universe) to optimize tracking error and minimize transaction cost. The Fund will be managed relative to a composite index, which is a blend of two market indexes designed to measure the performance of the US dollar denominated multilateral development bank bond market. The Fund seeks to minimize tracking error relative to the composite index but does not seek to directly replicate the index. The Fund's composite index is the Solactive UBS Global Multilateral Development Bank Bond USD 40% 1-5 Year 60% 5-10 Year Total Return Index. (The Fund reserves the right in its discretion to change the index). The Fund's development bank bond investments may include issuers that are not part of the composite index. The Fund will seek to maintain a concentrated portfolio of development bank bonds emphasizing multilateral development banks. The portfolio management team will select the bonds in the market that meet their selection criteria with intention to provide similar risk/return characteristics as the broader development bank bond market.

The Fund may engage in active trading to adjust the portfolio in response to investor activity and to rebalance the portfolio as new development bank issuers come to the market and existing issuers enter the index or mature.

Main risks

All investments carry a certain amount of risk, and the Fund cannot guarantee that it will achieve its investment objective. You may lose money by investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Below are some of the specific risks of investing in the Fund.

Concentration risk: The Fund concentrates in the bonds of development banks. The risk that if the Fund has most of its investments in a single industry, its portfolio will be more susceptible to factors adversely affecting that industry than would a more diverse portfolio of securities.

Credit risk: The risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to or guarantor of a derivative contract, is unable or unwilling to meet its financial obligations. This risk is likely greater for lower quality investments than for investments that are higher quality.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an

underlying asset, reference rate or index—may rise or fall more rapidly than other investments. It is possible for the Fund to lose more than the amount it invested in the derivative. The risks of investing in derivative instruments also include market risk, management risk, counterparty risk (which is the risk that a counterparty to a derivative contract is unable or unwilling to meet its financial obligations) and the risk that changes in the value of a derivative may not correlate perfectly with the underlying asset, rate, index or overall market security. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

Interest rate risk: An increase in prevailing interest rates typically causes the value of fixed income securities to fall. Changes in interest rates will likely affect the value of longer-duration fixed income securities more than shorter-duration securities and higher quality securities more than lower quality securities. When interest rates are falling, some fixed income securities provide that the issuer may repay them earlier than the maturity date, and if this occurs the Fund may have to reinvest these repayments at lower interest rates. The risks associated with rising interest rates may be more pronounced in the near future as interest rates rise from historically low rates.

Liquidity risk: The risk that investments cannot be readily sold at the desired time or price, and the Fund may have to accept a lower price or may not be able to sell the security at all. An inability to sell securities can adversely affect the Fund's value or prevent the Fund from taking advantage of other investment opportunities. Liquid portfolio investments may become illiquid or less liquid after purchase by the Fund due to low trading volume, adverse investor perceptions and/or other market developments. In recent years, the number and capacity of dealers that make markets in fixed income securities has decreased. Consequently, the decline in dealers engaging in market making trading activities may increase liquidity risk, which can be more pronounced in periods of market turmoil. Liquidity risk may be magnified in a rising interest rate environment or when investor redemptions from fixed income funds may be higher than normal, causing increased supply in the market due to selling activity. Liquidity risk includes the risk that the Fund will experience significant net

redemptions at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the Advisor may not produce the desired results.

Non-diversification risk: The Fund is a non-diversified investment company, which means that the Fund may invest more of its assets in a smaller number of issuers than a diversified investment company. As a non-diversified fund, the Fund's share price may be more volatile, and the Fund has a greater potential to realize losses upon the occurrence of adverse events affecting a particular issuer.

Portfolio turnover risk: High portfolio turnover from frequent trading will increase the Fund's transaction costs and may increase the portion of the Fund's capital gains that are realized for tax purposes in any given year. The Fund does not restrict the frequency of trading in order to limit expenses or the tax effect that its distributions may have on shareholders.

Risks of development bank bonds: The value of the Fund's investments in bonds issued by development banks may fall due to adverse financial market developments in the United States and abroad. Borrowers from development banks include foreign countries, which may include emerging market countries, and borrowers of specific development banks also include the private sector with or without government guarantee. Therefore, negative economic, social and political developments could affect the ability of a borrower to repay its loan to the development bank and thus affect its financial condition. In addition, investments in such development bank bonds may involve special risks because the Fund may have limited legal recourse in the event of default. Also, development bank bonds may sometimes be less liquid and more difficult to sell and to value than high-quality securities of US issuers. Bonds issued by a development bank are backed by the shareholders of the development bank. The development bank may be supported via various mechanisms, including preferred creditor status, equity injections by its shareholders and callable capital, even though the latter may have never been tested with respect to an issuer. Changes in the shareholder structure of a development bank or changes in the strength of the support by its shareholders could affect the credit rating and thus the value of the bonds issued by the development bank.

Performance

There is no performance information quoted for the Fund as the Fund had not commenced investment operations as of the date of this prospectus.

Investment advisor

UBS Asset Management (Americas) Inc. serves as the investment advisor to the Fund.

Portfolio manager

• Matthias Dettwiler, portfolio manager of the Fund since its inception.

Purchase & sale of Fund shares

Tax information

Payments to broker-dealers and other financial intermediaries

More information about the funds—UBS Engage For Impact Fund

Investment objective, strategies, securities selection and risks

Fund objective

The Fund seeks to maximize total return, consisting of capital appreciation and current income.

The Fund's investment objective is "non-fundamental." This means that it may be changed by the Fund's Board of Trustees without shareholder approval.

Principal investment strategies

To achieve its investment objective, the Fund invests in, or seeks exposure to companies that provide solutions to significant global challenges—such as climate change, air pollution, clean water and water scarcity, treatment of disease, alleviation of poverty and food security—through the impact of their products and services. The Advisor selects companies based on various fundamental financial factors, material sustainability factors such as environmental, social and governance performance along with assessing the current and potential ability of such companies to have a measurable impact on society and the environment.

Under normal circumstances, the Fund invests a substantial portion of its net assets (plus borrowings for investment purposes, if any) in equity securities. Investments in equity securities may include, but are not limited to, dividend-paying securities, common stock and preferred stock of issuers located throughout the world; Global, European and American Depositary Receipts; as well as investment companies, including exchange-traded funds. The Fund may invest in issuers from both developed markets (including the United States) and emerging markets. The Advisor, on behalf of the Fund, intends to diversify broadly among countries, but reserves the right to invest a substantial portion of the Fund's assets in one or more countries if economic and business conditions warrant such investments. The Fund may invest in stocks of companies of any size.

stocks, bonds, interest rates, credit, currencies or currency exchange rates, commodities and related indexes. The derivatives in which the Fund may invest include futures, forward currency agreements and equity participation notes. All of these derivatives may be used for risk management purposes to manage or adjust the risk profile of the Fund. Futures on currencies and forward currency agreements may also be used to hedge against a specific currency. In addition, all of the derivative instruments listed above may be used for investment (non-hedging) purposes to earn income; to enhance returns; to replace more traditional direct investments (except for forward currency agreements); or to obtain exposure to certain markets (except for forward currency agreements). The Fund also may use futures contracts on equity securities and indices to gain market exposure on its uninvested cash.

Securities selection

• Its assessment of fundamental valuation (price/intrinsic value) to seek attractively valued companies with strong financial performance;

• Quantitative and qualitative environmental, social and governance ("ESG") factors;

• Quantitative and qualitative assessment of a company's current and potential impact on society and the environment; and

• Advisor's ability to drive positive change in a company's impact profile through engagement.

More information about the funds—UBS Engage For Impact Fund

The impact universe is comprised of companies whose products and services can create measurable, verifiable impact within specific impact categories (such as climate change, air pollution, clean water and water scarcity, treatment of disease and food security and others) that are aligned with the United Nations Sustainable Development Goals. The Advisor's assessment of the ability of public companies to generate impact is based upon impact measurement methodologies the Advisor has developed in partnership with academics from the fields of earth sciences and public health science. The impact of portfolio holdings is measured in changes in human well-being and changes in environmental quality (e.g. reduction in air pollution, hospitalizations and biodiversity loss).

• Improve the Advisor's ability to independently measure impact;

• Engage the company to help it inform its strategy with regard to societal goals;

• Engage the company to help increase its product and service impact by identifying target markets, customers and business partners that create additional impact over time; and

The Fund may invest in cash or cash equivalent instruments, including shares of an affiliated investment company. When market conditions warrant, the Fund may make substantial temporary defensive investments in cash or cash equivalents, which may affect the Fund's ability to pursue its investment objective.

The Fund may lend its portfolio securities to generate additional income.

More about risks

An investment in the Fund is not guaranteed; you may lose money by investing in the Fund. The other principal risks presented by an investment in the Fund are:

• Derivatives risk—Derivatives involve risks different from, and possibly greater than, the risks associated with investing directly in securities and other instruments. Derivatives require investment techniques and risk analyses different from those of other investments. If the Advisor incorrectly forecasts the value of securities, currencies, interest rates, or other economic factors in using derivatives, the Fund might have been in a better position if the Fund had not entered into the derivatives. While some strategies involving derivatives can protect against the risk of loss, the use of derivatives can also reduce the opportunity for gain or even result in losses by offsetting favorable price movements in other Fund investments. Derivatives also involve the risk of mispricing or improper valuation, the risk that changes in the value of a derivative may not correlate perfectly with the underlying asset, rate, index, or overall securities markets, and counterparty

More information about the funds—UBS Engage For Impact Fund

and credit risk (the risk that the other party to a derivative will not fulfill its contractual obligations, whether because of bankruptcy or other default). With respect to futures, there is a risk of loss by the Fund of the initial and variation margin deposits in the event of bankruptcy of a futures commission merchant ("FCM") with which the Fund has an open position in a futures contract. The assets of the Fund may not be fully protected in the event of the bankruptcy of the FCM or central counterparty. The Fund is also subject to the risk that the FCM could use the Fund's assets to satisfy its own financial obligations or the payment obligations of another customer to the central counterparty. Gains or losses involving some options, futures, and other derivatives may be substantial (for example, for some derivatives, it is possible for the Fund to lose more than the amount the Fund invested in the derivatives). Some derivatives tend to be more volatile than other investments, resulting in larger gains or losses in response to market changes. Derivatives are subject to a number of other risks, including liquidity risk (the possible lack of a secondary market for derivatives and the resulting inability of the Fund to sell or otherwise close out the derivatives) and interest rate risk (some derivatives are more sensitive to interest rate changes and market price fluctuations). The Fund's use of derivatives may cause the Fund to realize higher amounts of short-term capital gains (generally taxed at ordinary income tax rates) than if the Fund had not used such instruments. Finally, the regulation of derivatives is a rapidly changing area of law and it is not possible to predict fully the effects of current or future regulation. It is possible that developments in government regulation of various types of derivatives could affect the character, timing and amount of the Fund's taxable income or gains; may limit or prevent the Fund from using or limit the Fund's use of these instruments effectively as a part of its investment strategy; and could adversely affect the Fund's ability to achieve its investment objective. The Fund's use of derivatives may be limited by the requirements for taxation of the Fund as a regulated investment company. New requirements, even if not directly applicable to the Fund, may increase the cost of the Fund's investments and cost of doing business, may limit the availability of derivatives or may otherwise adversely affect the value or performance of derivatives.

• Emerging market risk—The risk that investments in emerging market issuers may decline in value because of unfavorable foreign government actions, greater risks of political instability or the absence of accurate information about emerging market issuers. Further, emerging countries may have economies based on only a few industries and securities markets that trade only a small number of securities and employ settlement procedures different from those used in the United States. Prices on these exchanges tend to be volatile and, in the past, securities in these countries have offered greater potential for gain (as well as loss) than securities of companies located in developed countries. Further, investments by foreign investors are subject to a variety of restrictions in many emerging countries. Countries such as those in which the Fund may invest may experience high rates of inflation, high interest rates, exchange rate fluctuations or currency depreciation, large amounts of external debt, balance of payments and trade difficulties and extreme poverty and unemployment.

• Foreign investing risk—The risk that prices of the Fund's investments in foreign securities may go down because of unfavorable foreign government actions, political instability or the absence of accurate information about foreign issuers. In addition, political, diplomatic, or regional conflicts, terrorism or war, social and economic instability, and internal or external policies or economic sanctions limiting or restricting foreign investment, the movement of assets or other economic activity may affect the value and liquidity of foreign securities. Also, a decline in the value of foreign currencies relative to the US dollar will reduce the value of securities denominated in those currencies. In addition, foreign securities are sometimes less liquid and harder to sell and to value than securities of US issuers. Each of these risks is more severe for securities of issuers in emerging market countries. The risk of investing in Europe may be heightened due to the referendum in which the United Kingdom voted to exit the European Union ("EU"). There is a significant degree of uncertainty about how negotiations relating to the United Kingdom's withdrawal will be conducted, as well as the potential consequences and precise timeframe for "Brexit." While it is not possible to determine the precise impact these events may have on the Fund, during this period and beyond, the impact on the United Kingdom and European economies and the broader global economy could be

More information about the funds—UBS Engage For Impact Fund

significant, resulting in negative impacts, such as increased volatility and illiquidity, and potentially lower economic growth in markets in the United Kingdom, Europe and globally, which may adversely affect the value of the Fund's investments. In addition, if one or more countries were to exit the EU or abandon the use of the euro as a currency, the value of investments tied to those countries or the euro could decline significantly and unpredictably.

• Geographic concentration risk—The risk that if the Fund has most of its investments in a single country or region, its portfolio will be more susceptible to factors adversely affecting issuers located in that country or region than would a more geographically diverse portfolio of securities.

• Investing in ETFs risk—The Fund's investment in ETFs may subject the Fund to additional risks than if the Fund would have invested directly in the ETF's underlying securities. While the risks of owning shares of an ETF generally reflect the risks of owning the underlying securities the ETF is designed to track, lack of liquidity in an ETF can result in its value being more volatile than the underlying portfolio securities. In addition, shares of ETFs typically trade on securities exchanges, which may subject the Fund to the risk that an ETF in which the Fund invests may trade at a premium or discount to its net asset value. Also, an ETF may not replicate exactly the performance of the benchmark index it seeks to track for a number of reasons, including transaction costs incurred by the ETF, the temporary unavailability of certain index securities in the secondary market or discrepancies between the ETF and the index with respect to the weighting or number of instruments held by the ETF. Investing in an ETF may also be more costly than if a Fund had owned the underlying securities directly. The Fund, and indirectly, shareholders of the Fund, bear a proportionate share of the ETF's expenses, which include manage- ment and advisory fees and other expenses. In addition, the Fund will pay brokerage commissions in connection with the purchase and sale of shares of ETFs.

• Leverage risk associated with financial instruments—Certain derivatives that the Fund may use may create leverage. Derivatives that involve leverage can result in losses to the Fund that exceed the amount originally invested in the derivatives.

• Management risk—The risk that the investment strategies, techniques and risk analyses employed by the Advisor may not produce the desired results. The Advisor may be incorrect in its assessment of the value of securities or assessment of market trends, which can result in losses to the Fund.

• Market risk—The risk that the market value of the Fund's investments will fluctuate as the stock and bond markets fluctuate. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole.

• Securities lending risk—Securities lending involves the lending of portfolio securities owned by the Fund to qualified broker-dealers and financial institutions who provide collateral to the Fund in connection with these loans. Securities lending involves the risk that the borrower may fail to return the securities in a timely manner or at all. As a result, the Fund may lose money and there may be a delay in recovering the loaned securities. The Fund also could lose money if it does not recover the securities and/or the value of the collateral falls, including the value of investments made with cash collateral.

• Small- and mid-capitalization risk—The risk that investments in small and medium size companies may be more volatile than investments in larger companies, as small and medium size companies generally experience higher growth and failure rates. The trading volume of these securities is normally lower than that of larger companies. Such securities may be less liquid than others and could make it difficult to sell a security at a time or price desired. Changes in the demand for these securities generally have a disproportionate effect on their market price, tending to make prices rise more in response to buying demand and fall more in response to selling pressure.

• Sustainability factor risk and risk of impact investing—The Fund's sustainability factors used in its investment process and the Advisor's impact investing approach will likely make the Fund perform differently from a fund that relies solely or primarily on financial metrics. The sustainability factors and the Advisor's impact investing approach may cause the Fund's industry allocation to deviate from that of funds without these considerations.

More information about the funds—UBS Engage For Impact Fund

Other information

Exclusion of Advisor from commodity pool operator definition—With respect to the Fund, the Advisor has claimed an exclusion from the definition of "commodity pool operator" ("CPO") under the Commodity Exchange Act ("CEA") and the rules of the US Commodity Futures Trading Commission ("CFTC") and, therefore, is not subject to CFTC registration or regulation as a CPO. In addition, the Advisor is relying upon a related exclusion from the definition of "commodity trading advisor" under the CEA and the rules of the CFTC.

The terms of the CPO exclusion require the Fund, among other things, to adhere to certain limits on its investments in "commodity interests." Commodity interests include commodity futures, commodity options and swaps, which in turn include non-deliverable forward currency agreements, as further described in the Fund's statement of additional information ("SAI"). Because the Advisor and the Fund intend to comply with the terms of the CPO exclusion at this time, the Fund will limit its investments in these types of instruments. The Fund is not intended as a vehicle for trading in the commodity futures, commodity options or swaps markets. The CFTC has neither reviewed nor approved the Advisor's reliance on these exclusions, or the Fund, its investment strategies or this prospectus.

More information about the funds—UBS Sustainable Development Bank Bond Fund

Investment objective, strategies, securities selection and risks

Fund objective

The Fund seeks current income.

The Fund's investment objective is "non-fundamental." This means that it may be changed by the Fund's Board of Trustees without shareholder approval.

Principal investment strategies

Under normal circumstances, the Fund will invest in securities that, at the time of purchase, possess a minimum rating of A3 by Moody's or A- by S&P or Fitch, comparably rated by another nationally recognized statistical rating organization, or, if unrated, are determined by the Advisor to be of comparable quality.

The Fund's investments in fixed income securities may have all types of interest rate payment and reset terms. The Fund generally invests only in US dollar-denominated securities.

The Fund is a non-diversified fund.

The Fund will notify shareholders at least 60 days prior to any change in its policy of investing at least 80% of

its net assets (plus borrowings for investment purposes, if any) in bonds and/or instruments that provide exposure to bonds issued by development banks.

Securities selection

More information about the funds—UBS Sustainable Development Bank Bond Fund

The Fund may lend its portfolio securities to generate additional income.

More about risks

An investment in the Fund is not guaranteed; you may lose money by investing in the Fund. The other principal risks presented by an investment in the Fund are:

• Concentration risk—The Fund concentrates in the bonds of development banks. The risk that if the Fund has most of its investments in a single industry, its portfolio will be more susceptible to factors adversely affecting that industry than would a more diverse portfolio of securities.

• Credit risk—The risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to or guarantor of a derivative contract, is unable or unwilling to meet its financial obligations. This risk is likely greater for lower quality investments than for investments that are higher quality.

also involve the risk of mispricing or improper valuation, the risk that changes in the value of a derivative may not correlate perfectly with the underlying asset, rate, index, or overall securities markets, and counterparty and credit risk (the risk that the other party to a derivative will not fulfill its contractual obligations, whether because of bankruptcy or other default). With respect to futures, there is a risk of loss by the Fund of the initial and variation margin deposits in the event of bankruptcy of a futures commission merchant ("FCM") with which the Fund has an open position in a futures contract. The assets of the Fund may not be fully protected in the event of the bankruptcy of the FCM or central counterparty. The Fund is also subject to the risk that the FCM could use the Fund's assets to satisfy its own financial obligations or the payment obligations of another customer to the central counterparty. Gains or losses involving some options, futures, and other derivatives may be substantial (for example, for some derivatives, it is possible for the Fund to lose more than the amount the Fund invested in the derivatives). Some derivatives tend to be more volatile than other investments, resulting in larger gains or losses in response to market changes. Derivatives are subject to a number of other risks, including liquidity risk (the possible lack of a secondary market for derivatives and the resulting inability of the Fund to sell or otherwise close out the derivatives) and interest rate risk (some derivatives are more sensitive to interest rate changes and market price fluctuations). The Fund's use of derivatives may cause the Fund to realize higher amounts of short-term capital gains (generally taxed at ordinary income tax rates) than if the Fund had not used such instruments. Finally, the regulation of derivatives is a rapidly changing area of law, and it is not possible to predict fully the effects of current or future regulation. It is possible that developments in government regulation of various types of derivatives could affect the character, timing and amount of the Fund's taxable income or gains; may limit or prevent the Fund from using or limit the Fund's use of these instruments effectively as a part of its investment strategy; and could adversely affect the Fund's ability to achieve its investment objective. The Fund's use of derivatives may be limited by the requirements for taxation of the Fund as a regulated investment company. New requirements, even if not directly applicable to the Fund, may increase the cost of the Fund's investments and cost of doing business, may limit the availability of derivatives or may

More information about the funds—UBS Sustainable Development Bank Bond Fund

otherwise adversely affect the value or performance of derivatives.

• Interest rate risk—The risk that changing interest rates may adversely affect the value of an investment. An increase in prevailing interest rates typically causes the value of fixed income securities to fall, while a decline in prevailing interest rates may cause the market value of fixed income securities to rise. Changes in interest rates will affect the value of longer-term fixed income securities more than shorter-term securities and higher quality securities more than lower quality securities. Interest rate changes can be sudden and unpredictable, and are influenced by a number of factors including government policy, inflation expectations and supply and demand. A substantial increase in interest rates may have an adverse impact on the liquidity and valuation of a security, especially those with longer maturities. Changes in government monetary policy, including changes in tax policy or changes in a central bank's implementation of specific policy goals, may have a substantial impact on interest rates. There can be no guarantee that any particular government or central bank policy will be continued, discontinued or changed nor that any such policy will have the desired effect on interest rates. The risks associated with rising interest rates may be more pronounced in the near future as interest rates rise from historically low rates.

• Liquidity risk—The risk that investments cannot be readily sold at the desired time or price, and the Fund may have to accept a lower price or may not be able to sell the security at all. An inability to sell securities can adversely affect the Fund's value or prevent the Fund from taking advantage of other investment opportunities. Liquid portfolio investments may become illiquid or less liquid after purchase by the Fund due to low trading volume, adverse investor perceptions and/or other market developments. In recent years, the number and capacity of dealers that make markets in fixed income securities has decreased. Consequently, the decline in dealers engaging in market making trading activities may increase liquidity

risk, which can be more pronounced in periods of market turmoil. Liquidity risk may be magnified in a rising interest rate environment or when investor redemptions from fixed income funds may be higher than normal, causing increased supply in the market due to selling activity. Liquidity risk includes the risk that the Fund will experience significant net redemptions at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.

• Market risk—The market value of the Fund's investments may fluctuate, sometimes rapidly or unpredictably, as the stock and bond markets fluctuate. Market risk may affect a single issuer, industry, or sector of the economy, or it may affect the market as a whole.

• Non-diversification risk—The risk that the Fund will be more volatile than a diversified fund because it invests its assets in a smaller number of issuers. The gains or losses on a single security may, therefore, have a greater impact on the Fund's net asset value.

• Portfolio turnover risk—High portfolio turnover from frequent trading will increase the Fund's transaction costs and may increase the portion of the Fund's capital gains that are realized for tax purposes in any given year. This, in turn, may increase the Fund's taxable distributions in that year. Frequent trading also may increase the portion of the Fund's realized capital gains that is considered "short-term" for tax purposes. Shareholders will pay higher taxes on distributions that represent short-term capital gains than they would pay on distributions that represent long-term capital gains. The Fund does not restrict the frequency of trading in order to limit expenses or the tax effect that its distributions may have on shareholders.

• Risks of development bank bonds—The value of the Fund's investments in bonds issued by development banks may fall due to adverse financial market developments in the United States and abroad. Borrowers

More information about the funds—UBS Sustainable Development Bank Bond Fund

from development banks include foreign countries, which may include emerging market countries, and borrowers of specific development banks also include the private sector with or without government guarantee. Therefore, negative economic, social and political developments could affect the ability of a borrower to repay its loan to the development bank and thus affect its financial condition. In addition, investments in such development bank bonds may involve special risks because the Fund may have limited legal recourse in the event of default. Also, development bank bonds may sometimes be less liquid and more difficult to sell and to value than high-quality securities of US issuers. Bonds issued by a development bank are backed by the shareholders of the development bank. The development bank may be supported via various mechanisms including, preferred creditor status, equity injections by its shareholders and callable capital, even though the latter may have never been tested with respect to an issuer. Changes in the shareholder structure of a development bank or changes in the strength of the support by its shareholders could affect the credit rating and thus the value of the bonds issued by the development bank.

Other information

Exclusion of Advisor from commodity pool operator definition—With respect to the Fund, the Advisor has claimed an exclusion from the definition of CPO under the CEA and the rules of the CFTC and, therefore, is not subject to CFTC registration or regulation as a CPO. In addition, the Advisor is relying upon a related exclusion from the definition of "commodity trading advisor" under the CEA and the rules of the CFTC.

The terms of the CPO exclusion require the Fund, among other things, to adhere to certain limits on its

investments in "commodity interests." Commodity interests include commodity futures, commodity options and swaps, which in turn include non-deliverable forward currency agreements, as further described in the Fund's SAI. Because the Advisor and the Fund intend to comply with the terms of the CPO exclusion at this time, the Fund will limit its investments in these types of instruments. The Fund is not intended as a vehicle for trading in the commodity futures, commodity options or swaps markets. The CFTC has neither reviewed nor approved the Advisor's reliance on these exclusions, or the Fund, its investment strategies or this prospectus.

Managing your fund account

Flexible pricing

Each Fund offers Class A and Class P shares. The UBS Sustainable Development Bank Bond Fund also offers Class P2 shares, which are offered in a separate prospectus. Each class has different sales charges and ongoing expenses. Class P and Class P2 shares are available only to certain types of investors. Only Class A and Class P shares are offered in this prospectus.

Each Fund has adopted a Rule 12b-1 plan for its Class A shares that allows it to pay service fees for services provided to shareholders.

For the UBS Engage For Impact Fund, you may qualify for a waiver of certain sales charges on Class A shares. See "Sales charge waivers for Class A shares" below. You may also qualify for a reduced sales charge on Class A shares. See "Sales charge reductions for Class A shares" below.

The availability of sales charge waivers and discounts may depend on the particular intermediary or type of account through which you purchase or hold fund shares.

The sales charge waivers and discounts disclosed below in this prospectus are available for qualifying purchases made directly from the principal underwriter and are generally available through financial intermediaries, unless otherwise specified in Appendix A to this prospectus.

The sales charge waivers and discounts available through certain financial intermediaries are set forth in Appendix A to this prospectus, which may differ from those available for purchases made directly from the principal underwriter or certain other financial intermediaries. Please contact your financial intermediary for more information regarding sales charge waivers and discounts and the financial intermediary's related policies and procedures, including information regarding eligibility requirements for waivers or discounts that may be available to you.

Class A shares

Class A shares of the UBS Engage For Impact Fund have a front-end sales charge that is included in the offering price of the Class A shares. This sales charge is paid at the time of purchase and is not invested in the Fund. Shareholders of the UBS Sustainable Development Bank Bond Fund pay no front-end or deferred sales charges on Class A shares, except that under very limited circumstances, a deferred sales charge may apply in connection with shares acquired via an exchange from another fund. Class A shares of the UBS Engage For Impact Fund pay an annual service (12b-1) fee of 0.25% of average net assets on an ongoing basis, and Class A shares of the UBS Sustainable Development Bank Bond Fund pay an annual service (12b-1) fee of 0.10% of average net assets on an ongoing basis. Over time these fees will increase the cost of your investment and may cost you more than paying other types of sales charges. Class A shares pay no distribution fees.

The Class A sales charges for the UBS Engage For Impact Fund are described in the following table:

Class A sales charges. UBS Engage For Impact Fund:

	Sales charge as a percentage of:						Reallowance to selected
Amount of investment	Offering price			Net amount invested			dealers as percentage of offering price
Less than $50,000		5.50	%		5.82	%		5.00	%
$50,000 to $99,999		4.50			4.71			4.00
$100,000 to $249,999		3.50			3.63			3.00
$250,000 to $499,999		2.50			2.56			2.00
$500,000 to $999,999		2.00			2.04			1.75
$1,000,000 and over¹		None			None			May pay up to 1.00²

¹ A contingent deferred sales charge of 1% of the shares' offering price or the net asset value at the time of sale by the shareholder, whichever is less, is charged on sales of shares made within one year of the purchase date. Class A shares representing reinvestment of dividends are not subject to this 1% charge. Withdrawals in the first year after purchase of up to 12% of the value of the fund account under a Fund's Automatic Cash Withdrawal Plan are not subject to this charge.

² For sales of $1 million or more, UBS Asset Management (US) Inc. ("UBS AM (US)") pays to the dealer an amount based upon the following schedule: 1.00% on the first $3 million and 0.75% on the next $2 million.

If you intend to purchase more than $5 million of Class A shares, subject to availability at your intermediary, you should instead purchase Class P shares, which have lower on-going expenses.

Sales charge waivers for Class A shares (UBS Engage For Impact Fund)

Class A front-end sales charge waivers—Front-end sales charges will be waived if you buy Class A shares with proceeds from the following sources:

1. Redemptions from any registered mutual fund for which UBS AM (US) or any of its affiliates serves as principal underwriter if you:

• Originally paid a front-end sales charge on the shares; and

• Reinvest the money within 365 days of the redemption date.

The Fund's front-end sales charges will also not apply to Class A purchases by or through:

2. Employees of UBS Group AG ("UBS") and its subsidiaries and members of the employees' immediate families; and members of the Board of Directors/Trustees (and former Board members who retire from such Boards after December 1, 2005) of any investment company for which UBS AM (US) or any of its affiliates serve as principal underwriter.

3. Trust companies and bank trust departments investing on behalf of their clients if clients pay the bank or trust company an asset-based fee for trust or asset management services.

4. Retirement plans and deferred compensation plans that have assets of at least $1 million or at least 25 eligible employees.

5. Broker-dealers and other financial institutions (including registered investment advisors and financial planners) that have entered into a selling agreement with UBS AM (US) (or otherwise have an arrangement with a broker-dealer or other financial institution with respect to sales of Fund shares), on behalf of clients participating in a fund supermarket, wrap program, or other program in which clients pay a fee

for advisory services, executing transactions in Fund shares, or for otherwise participating in the program.

6. Employees of broker-dealers and other financial institutions (including registered investment advisors and financial planners) that have entered into a selling agreement with UBS AM (US) (or otherwise having an arrangement with a broker-dealer or other financial institution with respect to sales of Fund shares), and their immediate family members, as allowed by the internal policies of their employer.

7. Insurance company separate accounts.

8. Shareholders of the Class N shares of any UBS Fund who held such shares at the time they were redesignated as Class A shares.

9. Reinvestment of capital gains distributions and dividends.

10. College savings plans organized under Section 529 of the Internal Revenue Code (the "IRC").

11. Broker-dealers or other financial institutions that have entered into an agreement with UBS AM (US) to offer Class A shares through a no-load network or platform or self-directed investment brokerage accounts, in which clients may or may not pay a transaction fee to the broker-dealer or financial institution.

12. Customers of financial intermediaries that have a contractual arrangement with the distributor or investment advisor where such contract provides for the waiver of the front-end sales charge. Each such contractual arrangement with a financial intermediary is described in Appendix A to this prospectus.

13. Clients of a financial intermediary that convert their shares from Class P shares to Class A shares in connection with the termination of their participation in the financial intermediary's fee-based advisory program.

Class A deferred sales charge waivers—The contingent deferred sales charge will be waived for:

• Redemptions of Class A shares by former holders of Class N shares of any UBS Fund;

• Exchanges between Family Funds ("Family Funds" include the PACE Select funds, the UBS Funds, and other funds for which UBS AM (US) serves as principal underwriter), if purchasing the same class of shares;

• Redemptions following the death or disability of the shareholder or beneficial owner;

• Tax-free returns of excess contributions from employee benefit plans;

• Distributions from employee benefit plans, including those due to plan termination or plan transfer;

• Redemptions made in connection with the Automatic Cash Withdrawal Plan, provided that such redemptions:

– are limited annually to no more than 12% of the original account value;

– are made in equal monthly amounts, not to exceed 1% per month; and

– the minimum account value at the time the Automatic Cash Withdrawal Plan was initiated was no less than $5,000;

• Redemptions of shares purchased through certain retirement plans;

• Broker-dealers or other financial institutions that have entered into an agreement with UBS AM (US) to offer Class A shares through a no-load network or platform or self-directed investment brokerage accounts, in which clients may or may not pay a transaction fee to the broker-dealer or financial institution; and

• Customers of financial intermediaries that have a contractual arrangement with the distributor or investment advisor where such contract provides for the waiver of the deferred sales charge. Each such contractual arrangement with a financial intermediary is described in Appendix A to this prospectus.

A contingent deferred sales charge applicable to Class A shares exchanged for Class P shares for traditional individual retirement accounts (IRAs), Roth IRAs,

Rollover IRAs, Inherited IRAs, SEP IRAs, SIMPLE IRAs, BASIC Plans, Educational Savings Accounts and Medical Savings Accounts on a Merrill Lynch platform will be waived. With respect to such waiver, Merrill Lynch will pay a portion of the contingent deferred sales charge that would have otherwise applied to UBS AM (US). Please ask your financial advisor if you are eligible for exchanging your Class A shares for Class P shares pursuant to these exchange features, which are described under "Managing your fund account—Class P shares" below. For more information regarding intermediary-specific sales charge waivers and discounts, please refer to Appendix A to this prospectus.

Sales charge reductions for Class A shares

Right of accumulation. A purchaser of Class A shares may qualify for a reduction of the front-end sales charge on purchases of Class A shares by combining a current purchase with certain other Class A, Class Y and/or Class P shares of Family Funds¹ already owned. To determine if you qualify for a reduction of the front-end sales charge, the amount of your current purchase is added to the current net asset value of your other Class A, Class Y and/or Class P shares, as well as those Class A, Class Y and/or Class P shares of your spouse and children under the age of 21 and who reside in the same household. If you are the sole owner of a company, you may also add any company accounts, including retirement plan accounts invested in Class A, Class Y and/or Class P shares of the Family Funds. Companies with one or more retirement plans may add together the total plan assets invested in Class A, Class Y and/or Class P shares of the Family Funds to determine the front-end sales charge that applies. To qualify for the discount on a purchase through a financial institution, when each purchase is made, the investor or institution must provide UBS AM (US) with sufficient information to verify that the purchase qualifies for the privilege or discount. The right of accumulation may be amended or terminated by UBS AM (US) at any time as to purchases occurring thereafter.

Shares purchased through a broker-dealer may be subject to different procedures concerning Rights of Accumulation. Please contact your investment professional for more information.

¹ Please note that any Family Fund that is a money market fund will not count for purposes of the right of accumulation discount or for purposes of satisfying the terms of a Letter of Intent.

Letter of Intent

Investors may also obtain reduced sales charges for Class A shares for investments of a particular amount by means of a written Letter of Intent, which expresses the investor's intention to invest that amount within a period of 13 months in shares of one or more Family Funds.¹ Each purchase of Class A shares under a Letter of Intent will be made at the public offering price applicable at the time of such purchase to a single transaction of the total dollar amount indicated in the Letter of Intent. A Letter of Intent may include purchases of Class A and/or Class P shares made not more than three months prior to the date that the investor signs a Letter of Intent and during the 13-month period in which the Letter of Intent is in effect; however, the 13-month period during which the Letter of Intent is in effect will begin on the date on which the Letter of Intent is signed.

Investors do not receive credit for shares purchased by the reinvestment of distributions. Investors qualifying for a right of accumulation discount (described above) may purchase shares under a single Letter of Intent.

The Letter of Intent is not a binding obligation upon the investor to purchase the full amount indicated. The minimum initial investment under a Letter of Intent is 5% of such amount, which must be invested immediately. Class A shares purchased with the first 5% of such amount may be held in escrow to secure payment of the higher sales charge applicable to the shares actually purchased if the full amount indicated is not purchased. When the full amount indicated has been purchased, the escrow will be released. If an investor desires to redeem escrowed shares before the full amount has been purchased, the shares will be released only if the investor pays the sales charge that, without regard to the Letter of Intent, would apply to the total investment made to date.

Letter of Intent forms may be obtained from UBS AM (US) or from investment professionals. Investors should read the Letter of Intent carefully.

Shares purchased through a broker-dealer may be subject to different procedures concerning Letters of Intent. Please contact your investment professional for more information.

Note on sales charge reductions and waivers for Class A

Additional information concerning sales charge reductions and waivers is available in the Funds' SAI and Appendix A to this prospectus. You are responsible for notifying your financial intermediary of any facts that may qualify you for a sales charge waiver or discount. If you think you qualify for any of the sales charge waivers described above, you may need to notify and/or provide documentation to UBS AM (US). You will also need to notify UBS AM (US) of the existence of other accounts in which there are holdings eligible to be aggregated to meet certain sales load breakpoints. Information you may need to provide to UBS AM (US) includes:

• Information or records regarding shares of the Funds or other funds held in all accounts at any financial intermediary;

• Information or records regarding shares of the Funds or other funds held in any account at any financial intermediary by related parties of the shareholder, such as members of the same family; and/or

• Any information that may be necessary for UBS AM (US) to determine your eligibility for a reduction or waiver of a sales charge.

For more information, you should contact your investment professional or call 1-800-647 1568. If you want information on the Automatic Cash Withdrawal Plan, see the SAI or contact your investment professional. Also, information regarding the Funds' distribution arrangements and the applicable sales charge reductions and waivers is available on the Funds' Web Site, free of charge, at http://www.ubs.com/us/en/asset_
management/individual_investors/mutual_fund.html.

For more information regarding intermediary-specific sales charge waivers and discounts, please refer to Appendix A to this prospectus.

Class P shares

Shareholders pay no front-end or deferred sales charges on Class P shares. UBS AM (US), the principal underwriter of the Funds, may make payments out of its own resources to certain affiliated dealers (e.g., UBS Financial

Services Inc.) and, from time to time, unaffiliated dealers in UBS AM (US)'s sole discretion. Only specific types of investors can purchase Class P shares.

The following are eligible to purchase Class P shares:

• Shareholders of the Class I shares of any UBS Fund who held such shares as of the date the shares were redesignated Class Y shares (now designated Class P shares);

• Retirement plans with 5,000 or more eligible employees or $100 million or more in plan assets;

• Retirement plan platforms/programs that include Fund shares if the platform/program covers plan assets of at least $100 million;

• Trust companies and bank trust departments purchasing shares on behalf of their clients in a fiduciary capacity;

• Banks, registered investment advisors and other financial institutions purchasing Fund shares for their clients as part of an advisory program;

• College savings plans organized under Section 529 of the IRC, if shareholder servicing fees are paid exclusively outside of the participating funds;

• Other investors as approved by the Funds' Board of Trustees;

• Shareholders who invest a minimum initial amount of $5 million in the Fund. An institutional investor may aggregate its holdings with holdings of certain related institutional investors to meet the foregoing minimum;

• Foundations, Endowments and Religious and other charitable organizations described in Section 501(c)(3) of the IRC that invest a minimum initial amount of $2,500,000;

• Employees of UBS AM (Americas) and UBS AM (US), as long as the employee establishes an account in his or her name directly at the Funds' transfer agent and purchases a minimum initial amount of $50,000;

• Members of the Board of Directors/Trustees (and former Board members who retire from such Boards after December 1, 2005) of any investment company for which UBS AM (US) or any of its affiliates serves as principal underwriter, subject to a minimum initial purchase amount of $50,000 in an account established by the member in his or her name directly at the Funds' transfer agent; and

• Investors who are clients of a wrap fee advisory program, including those programs sponsored by UBS AM (Americas) or its affiliates, and who invest a minimum initial amount of $1,000 (with a minimum subsequent investment of $100), unless waived by agreement or otherwise with UBS AM (US).

• A prior investor in a series of the UBS Relationship Funds that was an investor of such series on the date that the UBS Relationship Funds' series liquidated, as long as such investor establishes an account in the investor's name directly at the Funds' transfer agent within thirty days of such liquidation and purchases a minimum initial amount of $100,000.

• Merrill Lynch brokerage account holders who hold Class A shares of the funds and Merrill Lynch customers transferring external accounts to Merrill Lynch who hold Class A shares of the funds may exchange those Class A for Class P shares of the same fund to be held in a Merrill Advisory Program. Such exchanges will occur at the net asset value per share, without requiring any investment minimum to be met and without the imposition of any fees or other charges.

Class P shares do not pay ongoing 12b-1 distribution or service fees.

Buying shares

You can buy Class A or Class P shares through your investment professional at a broker-dealer or other financial institution with which UBS AM (US) has a sales agreement.

If you wish to invest in other Family Funds, you can do so by:

• Contacting your investment professional (if you have an account at a financial institution that has entered into a sales agreement with UBS AM (US));

• Buying shares through the transfer agent as described later in this prospectus; or

• Opening an account by exchanging shares from another Family Fund.

Selected securities dealers or other financial institutions, including UBS Financial Services Inc., may charge a processing fee to confirm a purchase. UBS Financial Services Inc. currently charges a fee of $5.25.

The Funds and UBS AM (US) reserve the right to reject a purchase order or suspend the offering of shares.

Through financial institutions/professionals

As mentioned above, the Funds have entered into one or more sales agreements with brokers, dealers or other financial intermediaries ("Service Providers"), as well as with financial institutions (banks and bank trust departments) (each an "Authorized Dealer"). The Authorized Dealer, or intermediaries designated by the Authorized Dealer (a "Sub-designee"), may in some cases be authorized to accept purchase and redemption orders that are in "good form" on behalf of the Funds. A Fund will be deemed to have received a purchase or redemption order when the Authorized Dealer or Sub- designee receives the order in good form. Such orders will be priced at the Fund's net asset value next computed after such order is received in good form by the Authorized Dealer or Sub-designee. These Authorized Dealers may charge the investor a transaction fee or other fee for their services at the time of purchase. These fees would not be otherwise charged if you purchased shares directly from the Funds. It is the responsibility of such Authorized Dealers or Sub-designees to promptly forward purchase orders with payments to the Funds.

A note about financial intermediary fee based advisory programs—intermediary directed share class conversions

Class A shares of a Fund held through a financial intermediary may be converted into Class P shares of the same Fund at net asset value per share (the "Conversion"). Class A shares may only be converted into Class P shares if the Conversion is made to facilitate the shareholder's participation in a fee based advisory program and the transaction is recorded by the financial intermediary or the Fund's transfer agent as a share class conversion. To qualify for a Conversion, the shareholder

must satisfy the conditions for investing in the Class P shares. Financial intermediaries may only convert a shareholder's Class A shares into Class P shares if the Class A shares are no longer subject to a CDSC or the financial intermediary has agreed to reimburse UBS AM (US) a portion of the CDSC otherwise payable on those shares. The timing and implementation of the Conversion are at the discretion of the shareholder's financial intermediary. Please contact your financial intermediary for more information about a Conversion of shares within your account.

Shareholders that no longer participate in a fee based advisory program may not buy any additional Class P shares (except through dividend reinvestments) unless such shareholder otherwise meets eligibility requirements of the share class. Additionally, shareholders no longer participating in a fee based advisory program may be required by the shareholder's financial intermediary to convert the existing Class P shares to Class A shares of the Fund.

Shareholders converting from Class A shares into Class P shares of the Fund will experience lower total share class expenses because Class P shares do not pay Rule 12b-1 service fees. It is generally expected that the Conversion will be tax-free for federal income tax purposes, which means former Class A shareholders would not have a taxable gain or loss on the Conversion of their shares to Class P shares of the same fund.

Please contact your investment professional for further information

Additional compensation to affiliated dealer

UBS AM (US) may pay its affiliate, UBS Financial Services Inc., the additional compensation in connection with the sale of Fund shares in consideration of distribution, marketing support and other services at an annual rate of 0.05% (5 basis points) of the value of the net assets invested in each Fund to be paid on a quarterly basis (although UBS Financial Services Inc. may choose not to receive such payments, or receive a reduced amount, on assets held in certain types of accounts or wrap fee advisory programs).

UBS Financial Services Inc. charges a minimum of $75,000 per calendar year for distribution, marketing support and other services.

The foregoing payments are made by UBS AM (US) out of its own resources. These payments are often referred to as "revenue sharing."

Additional compensation to other financial institution(s)

UBS AM (US) or the Advisor may pay compensation, out of the Advisor's profits and not as an additional charge to the Fund, to certain financial institutions (which may include banks, securities dealers and other industry professionals) for the sale and/or distribution of Fund shares or the retention and/or servicing of Fund investors and Fund shares. These payments are often referred to as "revenue sharing." Revenue sharing payments are paid in addition to any distribution or servicing fees payable under a 12b-1 or service plan of the Fund, any record keeping or sub-transfer agency fees payable by the Fund, or other fees described in the fee tables or elsewhere in the prospectus or SAI. Revenue sharing payments are paid from the Advisor's own resources and not as an additional charge to the Fund.

The level of revenue sharing payments made to financial institutions may be a fixed fee or based upon one or more of the following factors: gross sales, current assets and/or number of accounts of the Fund attributable to the financial institution, or other factors as agreed to by the Advisor and the financial institution or any combination thereof. The amount of the revenue share may be different for different financial institutions. For specific information about revenue sharing arrangements for a particular financial institution please see the SAI.

In some circumstances, revenue sharing payments may create an incentive for a financial institution, its employees or associated persons to recommend or sell shares of a Fund to you. You should consult with your financial advisor and review carefully any disclosure by the financial institution as to compensation received.

Minimum investments:

Class A shares (except retirement accounts):

To open an account: $1,000
To add to an account: $100

Class A (retirement accounts):

To open an account: $250
To add to an account: $25

Class P shares (except investors who are clients of a wrap fee program):

To open an account: $5,000,000
To add to an account: $0

Class P shares (investors who are clients of a wrap fee program):

To open an account: $1,000
To add to an account: $100

UBS AM (US) may waive or reduce these amounts for (or as otherwise noted in the prospectus):

• Employees of UBS AM (US) or its affiliates; or

• Participants in certain pension plans, retirement accounts, unaffiliated investment programs or the Funds' automatic investment plan.

Market timers. The interests of the Funds' long-term shareholders and their ability to manage their investments may be adversely affected when the Funds' shares are repeatedly bought and sold in response to short-term market fluctuations—also known as "market timing." Market timing may cause a Fund to have difficulty implementing long-term investment strategies, because it cannot predict how much cash it will have to invest. Market timing also may force a Fund to sell portfolio securities at disadvantageous times to raise the cash needed to buy a market timer's Fund shares. Market timing also may materially increase a Fund's transaction costs, administrative costs or taxes. These factors may hurt a Fund's performance and its shareholders.

In addition, the nature of a Fund's portfolio holdings may allow a shareholder to engage in a short-term trading strategy to take advantage of possible delays between the change in the Fund's portfolio holdings and the reflection of that change in the Fund's net asset value (often called "arbitrage market timing"). Such a delay may occur if a Fund has significant investments in non-US securities, where due to time zone differences, the value of those securities is established some time before the Fund calculates its net asset value. In such circumstances, the available market prices for such non-US securities may not accurately reflect the latest indications of value at the time the Fund calculates its net asset value. A Fund also may be subject to arbitrage

market timing because the Fund may have significant holdings in smaller cap securities, which may have market prices that do not accurately reflect the latest indications of value of these securities at the time that the Fund calculates its net asset value due to, among other reasons, infrequent trading or illiquidity. There is a possibility that arbitrage market timing may dilute the value of Fund shares if redeeming shareholders receive proceeds (and buying shareholders receive shares) based upon a net asset value that does not reflect appropriate fair value prices. One of the objectives of the Funds' fair value pricing procedures is to minimize the possibilities of this type of arbitrage market timing.

The Board of Trustees of the Trust has adopted the following policies as a means to discourage, detect and prevent market timing. A Fund will reject purchase orders and exchanges into the Fund by any person, group or account that UBS AM (Americas), as the Funds' Advisor and Administrator, determines to be a market timer. UBS AM (Americas) maintains market timing prevention procedures under which it reviews daily reports from the Funds' transfer agent of all accounts that engaged in transactions in Fund shares that exceed a specified monetary threshold and effected such transactions within a certain period of time to evaluate whether any such account had engaged in market timing activity. In evaluating the account transactions, UBS AM (Americas) will consider the potential harm of the trading or exchange activity to a Fund or its shareholders. If UBS AM (Americas) determines, in its sole discretion, that a shareholder has engaged in market timing, the shareholder will be permanently barred from making future purchases or exchanges into the Funds. Additionally, in making a determination as to whether a shareholder has engaged in market timing, the shareholder's account may be temporarily barred from making additional investments into a Fund pending a definitive determination. In addition, if a Financial Advisor is identified as the Financial Advisor of two or more accounts that have engaged in market timing, UBS AM (Americas) may prohibit the Financial Advisor from making additional purchases of the Fund on behalf of its clients.

Shares of the Funds may be held through omnibus account arrangements, whereby a broker-dealer, investment advisor, retirement plan sponsor or other financial intermediary (each a "Financial Intermediary") maintains an omnibus account with the Funds for trading on

behalf of its customers or participants. Omnibus accounts are accounts that aggregate the transactions of underlying shareholders, thus making it difficult to identify individual underlying account holder activity. If UBS AM (Americas) detects an unusual pattern of trading activity, UBS AM (Americas) will notify the Financial Intermediary of the omnibus account and will generally request that the Financial Intermediary provide underlying account detail. If UBS AM (Americas) identifies market timing activity, it generally will instruct the Financial Intermediary to block the customer or participant from further purchases of Fund shares. In the event that the Financial Intermediary is unable to identify and block the customer or participant, UBS AM (Americas) generally will require the Financial Intermediary to block the particular plan from further purchases of Fund shares or instruct the Funds' transfer agent to block all purchases and exchange purchase orders from the Financial Intermediary. UBS AM (Americas) may periodically request underlying account detail for omnibus accounts for review and analysis.

While the Funds will seek to take actions (directly and with the assistance of Financial Intermediaries) that will detect market timing, the Funds' efforts may not be completely successful in minimizing or eliminating such trading activity.

When it is determined that a Financial Intermediary's frequent trading policies and procedures sufficiently protect Fund shareholders, the Funds and UBS AM (Americas) may rely on the Financial Intermediary's frequent trading policies and procedures with respect to transactions by shareholders investing through the Financial Intermediary rather than applying the Funds' market timing prevention procedures. The determination to rely on a Financial Intermediary's frequent trading policies and procedures will be made after a review of the policies and procedures by the Legal and Compliance Departments of UBS AM (Americas). The Chief Compliance Officer of UBS AM (Americas) will determine whether the policies and procedures sufficiently protect Fund shareholders. The types of Financial Intermediaries that may have frequent trading policies and procedures on which the Funds and UBS AM (Americas) may rely may include broker-dealers, advisors, clearing firms, bank trust departments, retirement plan administrators, other record keepers and certain wrap fee program/platforms. In such cases, a Financial Intermediary through which a shareholder may own

Fund shares may impose frequent trading restrictions that differ from those of the Funds. If you have purchased shares through a Financial Intermediary as described above, you should contact your Financial Intermediary to determine the frequent trading restrictions that apply to your account.

Certain types of transactions are generally exempt from the market timing prevention procedures. These exempt transactions include redemptions through the Automatic Cash Withdrawal Plan, purchases through an automatic investment plan, purchases and redemptions by wrap fee accounts that have an automatic rebalancing feature and that have been identified to the Funds' principal underwriter and transfer agent, purchases and redemptions on behalf of clients of a fee based advisory program or certain other advisory programs in which UBS AM (Americas) exercises investment discretion, purchases and redemptions on behalf of institutional clients with which UBS AM (Americas) has signed an investment management agreement and exercises investment discretion on behalf of such client, purchases and redemptions below a specified monetary threshold by institutional clients with which UBS AM (Americas) has signed a separate investment management agreement, and purchases and redemptions by other registered investment companies managed by the Advisor.

Selling shares

You can sell your Fund shares at any time. If you own more than one class of shares, you should specify which Class you want to sell. If you do not, a Fund will assume that you want to sell shares in the following order: Class A, then Class P.

If you want to sell shares that you purchased recently, a Fund may delay payment until it verifies that it has received good payment. If you hold your shares through a financial institution, you can sell shares by contacting your investment professional, or an Authorized Dealer or Sub-designee, for more information. Important note: Each institution or professional may have its own procedures and requirements for selling shares and may charge fees. If you purchased shares through the Funds' transfer agent, you may sell them as explained later in this prospectus.

The Funds typically expect to pay sale proceeds to redeeming shareholders within 1-3 business days following receipt of a shareholder redemption order for

those payments made to your account held with a financial institution; however, the Fund may take up to 7 days to pay sale proceeds. For sale proceeds that are paid directly to a shareholder by a Fund, the Fund typically expects to pay proceeds by wire, ACH, or mailing a check to redeeming shareholders within 1 business day following receipt of the shareholder redemption order; however, the Fund may take up to 7 days to pay sale proceeds.

If you sell Class A shares and then repurchase Class A shares of the same Fund within 365 days of the sale, you can reinstate your account without paying a sales charge.

Securities dealers or other financial institutions, including UBS Financial Services Inc., may charge a fee to process a redemption of shares. UBS Financial Services Inc. currently charges a fee of $5.25.

Typically, redemptions of Fund shares will be made in cash. Each Fund typically expects to meet redemption requests by using holdings of cash or cash equivalents and/or proceeds from the sale of portfolio holdings. On a less regular basis, a Fund also may draw on a bank line of credit to meet redemption requests. In addition, under stressed market conditions or a particularly large redemption, a Fund may distribute redemption proceeds in-kind (instead of cash) to meet redemption requests, as described below.

Although not routinely used by the Funds, the Funds reserve the right to pay redemptions "in kind" (i.e., payment in securities rather than cash) if the investment you are redeeming is large enough to affect a Fund's operations or in particularly stressed market conditions. In these cases, you might incur brokerage or other costs converting the securities to cash. The securities included in a redemption in kind may include illiquid securities that may not be immediately saleable.

It costs the Funds money to maintain shareholder accounts. Therefore, the Funds reserve the right to repurchase all shares in any account that has a net asset value of less than $500. Any applicable deferred sales charge may be assessed on such redemptions. If a Fund elects to do this with your account, it will notify you that you can increase the amount invested to $500 or more within 60 days. A Fund will not repurchase shares in accounts that fall below $500 solely because of a decrease in the Fund's net asset value.

To help the government fight the funding of terrorism and money laundering activities, federal law requires all financial institutions to obtain, verify and record information that identifies each person who opens an account. If you do not provide the information requested, a Fund may not be able to maintain your account. If a Fund is unable to verify your identity (or that of another person(s) authorized to act on your behalf) within a reasonable time, the Fund and UBS AM (US) reserve the right to close your account and/or take such other action they deem reasonable or required by law. If we decide to close your account for this reason, your fund shares will be redeemed at the net asset value per share next calculated after the account is closed, less any applicable CDSC or fees. In addition, you will not be entitled to recoup any sales charges paid to a Fund in connection with your purchase of Fund shares. You may recognize a gain or loss on the redemption of your Fund shares, and you may incur a tax liability.

Exchanging shares

You may exchange Class A or Class P shares of a Fund for shares of the same class of most other Family Funds.

You will not pay either a front-end sales charge or a deferred sales charge when you exchange shares. Also, you may have to pay a deferred sales charge if you later sell the shares you acquired in the exchange. A Fund will use the date of your original share purchase to determine whether you must pay a deferred sales charge when you sell the shares of the fund acquired in the exchange.

Other Family Funds may have different minimum investment amounts. You may not be able to exchange your shares if the value of shares you exchange is not as large as the minimum investment amount in that other fund. Further, other Family Funds may have different eligibility requirements for purchase. You may not be able to exchange your shares if you are not eligible to purchase shares of the other Family Fund.

You may exchange shares of one fund for shares of another Family Fund only after the first purchase has settled and the first fund has received your payment.

If you hold your Fund shares through a financial institution, you may exchange your shares by placing an order with that institution. If you hold Fund shares through

the Funds' transfer agent, you may exchange your shares as explained below.

The Funds may modify or terminate the exchange privilege at any time.

Transfer agent

If you wish to invest in the Fund or any other of the Family Funds through the Funds' transfer agent, BNY Mellon Investment Servicing (US) Inc., you can obtain an application by calling 1-800-647 1568. You must complete and sign the application and mail it, along with a check to the transfer agent.

You may also sell or exchange your shares by writing to the Funds' transfer agent. Your letter must include:

• Your name and address;

• Your account number;

• The name of the fund whose shares you are selling, and if exchanging shares, the name of the fund whose shares you want to buy;

• The dollar amount or number of shares you want to sell and/or exchange; and

• A guarantee of each registered owner's signature. A signature guarantee may be obtained from a financial institution, broker, dealer or clearing agency that is a participant in one of the medallion programs recognized by the Securities Transfer Agents Association. These are: Securities Transfer Agents Medallion Program (STAMP), Stock Exchanges Medallion Program (SEMP) and the New York Stock Exchange Medallion Signature Program (MSP). The Fund will not accept signature guarantees that are not part of these programs.

Applications to purchase shares (along with a check), and letters requesting redemptions of shares or exchanges of shares through the transfer agent should be mailed to:

BNY Mellon Investment Serving (US) Inc.
UBS Asset Management
P.O. Box 9786
Providence, RI 02940

You do not have to complete an application when you make additional investments in the same Fund.

Unless you specifically elect otherwise, you will receive telephone privileges when you open your account, allowing you to obtain your account information, and conduct a number of transactions by phone, including: buy, sell, or exchange shares of the Funds; use electronic funds transfer or wire to buy or sell shares of the Funds; change your address; and add or change account services by calling 1-800-647 1568.

As long as we follow reasonable security procedures and act on instructions we reasonably believe are genuine, we will not be responsible for any losses that may occur from unauthorized requests. We will request account information and also may record calls. To help safeguard your account, keep your account information confidential and verify the accuracy of your confirmation statements immediately after you receive them. Contact us immediately if you believe someone has obtained unauthorized access to your account. Certain methods of contacting us (such as by phone) may be unavailable or delayed during periods of unusual market activity. If you have telephone privileges on your account and want to discontinue them, please contact us for instructions. You may reinstate these privileges at any time in writing.

Note that telephone privileges may not be available to all Family Funds. The Fund may modify, suspend or terminate telephone privileges at any time. For more information, you should contact your investment professional or call 1-800-647 1568.

Transfer of account limitations

If you hold your shares with UBS Financial Services, Inc. or another securities firm, please note that if you change securities firms, you may not be able to transfer your Fund shares to an account at the new securities firm. Fund shares may only be transferred to an account held with a securities dealer or financial intermediary that has entered into an agreement with the Funds' principal underwriter. If you cannot transfer your shares to another firm, you may choose to hold the shares directly in your own name with the Funds' transfer agent, BNY Mellon Investment Servicing (US) Inc. Please contact your broker or financial advisor, for information on how to transfer your shares to the Funds' transfer agent. If you transfer your shares to the Funds' transfer

agent, the Funds' principal underwriter may be named as the dealer of record and you will receive ongoing account statements from BNY Mellon Investment Servicing (US) Inc.

Should you decide to sell your shares of a Fund in lieu of transfer, you will pay a CDSC if those fees are applicable. Should you have any questions regarding the portability of your Fund shares, please contact your broker or financial advisor.

Pricing and valuation

The price at which you may buy, sell or exchange Fund shares is based on net asset value per share. Each Fund generally calculates its net asset value on days that the New York Stock Exchange ("NYSE") is open. A Fund calculates net asset value separately for each class as of the close of regular trading on the NYSE (generally, 4:00 p.m., Eastern time). The NYSE normally is not open, and the Funds do not price their shares, on most national holidays and on Good Friday. To the extent that a Fund's assets are traded in other markets on days when the NYSE is not open, the value of a Fund's assets may be affected on those days. If trading on the NYSE is halted for the day before 4:00 p.m., Eastern time, a Fund's net asset value per share generally will still be calculated as of the close of regular trading on the NYSE. The time at which a Fund calculates its net asset value and until which purchase, sale or exchange orders are accepted may be changed as permitted by the SEC.

Your price for buying, selling or exchanging shares will be based on the net asset value (adjusted for any applicable sales charges) that is next calculated after a Fund receives your order in good form. If you place your order on a day the NYSE is not open, your price for buying, selling or exchanging shares will be based on the net asset value (adjusted for any applicable sales charges) that is calculated on the next day that the NYSE is open. If you place your order through a financial institution, your financial advisor is responsible for making sure that your order is promptly sent to the Fund.

Each Fund calculates its net asset value based on the current market value, where available, for its portfolio investments. The Funds normally obtain market values for their investments from independent pricing sources and broker-dealers. Independent pricing sources may use reported last sale prices, official market closing prices, current market quotations or valuations from

computerized "evaluation" systems that derive values based on comparable investments. An evaluation system incorporates parameters such as security quality, maturity and coupon, and/or research and evaluations by its staff, including review of broker-dealer market price quotations, if available, in determining the valuation of the portfolio investments. If a market value is not readily available from an independent pricing source for a particular investment, that investment is valued at fair value as determined in good faith by or under the direction of the Trust's Board of Trustees.

The amortized cost method of valuation, which approximates market value, generally is used to value short-term debt instruments with 60 days or less remaining to maturity, unless the Board (or a committee designated by it) determines that this does not represent fair value. Investments in open-end investment companies are valued at the daily closing net asset value of the respective investment company. Investments in non-registered investment companies are also valued at the daily net asset value. All investments quoted in foreign currencies are valued daily in US dollars on the basis of the foreign currency exchange rates prevailing at the time such valuation is determined by the Funds' custodian. Foreign currency exchange rates are generally determined as of the close of the NYSE.

Investments traded in the OTC market and listed on The NASDAQ Stock Market, Inc. ("NASDAQ") normally are valued at the NASDAQ Official Closing Price. Other OTC securities are normally valued at the last bid price on the valuation date available prior to valuation. Investments that are listed on US and foreign stock exchanges normally are valued at the market closing price, the last sale price on the day the securities are valued or, lacking any sales on such day, at the last available bid price.

to transfer or resale. The need to fair value the Funds' portfolio investments may also result from low trading volume in foreign markets or thinly traded domestic investments, and when a security subject to a trading limit or collar on the exchange or market on which it is primarily traded reaches the "limit up" or "limit down" price and no trading has taken place at that price. Various factors may be reviewed in order to make a good faith determination of an investment's fair value. These factors include, but are not limited to, fundamental analytical data relating to the investment; the nature and duration of restrictions on disposition of the investments; and the evaluation of forces that influence the market in which the investments are purchased and sold.

Each Fund expects to price most of its portfolio investments based on current market value, as discussed previously. Investments for which market quotations are not readily available may be valued based upon appraisals received from a pricing service using a computerized evaluation system or formula method that takes into consideration market indices, matrices, yield curves and other specific adjustments. This may result in the investments being valued at a price different from the price that would have been determined had the evaluation or formula method not been used. Investments also may be valued based on appraisals derived from information concerning the investment or similar investments received from recognized dealers in those holdings. If a Fund concludes that a market quotation is not readily available for a portfolio investment for any number of reasons, including the occurrence of a "significant event" (e.g., natural disaster or governmental action), after the close of trading in its principal domestic or foreign market but before the close of regular trading on the NYSE, the Fund may use fair value methods to reflect those events. This policy is intended to assure that each Fund's net asset value fairly reflects the value of its portfolio holdings as of the time of pricing. Certain Funds may use a systematic fair valuation model provided by an independent third party to value investments principally traded in foreign markets in order to adjust for possible stale pricing that may occur between the close of the foreign exchanges and the time for valuation. The systematic fair valuation model may use calculations based on indices of domestic securities and other appropriate indicators, such as prices of relevant American Depositary Receipts and futures contracts. If an investment is valued at a "fair value," that

value is likely to be different from the last quoted market price for the investment. In cases where investments are traded on more than one exchange, the investments are valued on the exchange designated as the primary market by UBS AM (Americas), the investment advisor of the Funds.

Valuing investments at fair value involves greater reliance on judgment than valuing investments that have readily available market quotations. Fair value determinations can also involve reliance on quantitative models employed by a fair value pricing service. There can be no assurance that the Fund could obtain the fair value assigned to an investment if it were to sell the investment at approximately the time at which the Fund determines its net asset value per share. As a result, a Fund's sale or redemption of its shares at net asset value, at a time when a holding or holdings are valued at fair value, may have the effect of diluting or increasing the economic interest of existing shareholders.

A Fund may invest in investments that trade primarily in foreign markets that trade on weekends or other days on which the Fund does not calculate its net asset value. As a result, the Fund's net asset value may change on days when you will not be able to buy and sell your Fund shares. Certain investments in which the Funds invest are traded in markets that close before 4:00 p.m., Eastern time. Normally, developments that occur between the close of the foreign markets and 4:00 p.m., Eastern time, will not be reflected in the Fund's net asset value. However, if any of the Funds determine that such developments are so significant that they will materially affect the value of the Fund's investments, the Fund may adjust the previous closing prices to reflect what the Board believes to be the fair value of these investments as of 4:00 p.m., Eastern time.

Futures contracts are generally valued at the settlement price established each day on the exchange on which they are traded. Forward foreign currency contracts are valued daily using forward exchange rates quoted by independent pricing services. Swaps are marked-to-market daily based upon values from third party vendors or quotations from market makers to the extent available and the change in value, if any, is recorded as an unrealized gain or loss on the Statement of assets and liabilities. In the event that market quotations are not readily available or deemed unreliable, the swap is val-

ued at fair value as determined in good faith by or under the direction of the Board (or a committee designated by it).

A Fund's portfolio holdings may also consist of shares of other investment companies in which the Fund invests. The value of each such investment company will be its net asset value at the time the Fund's shares are priced. Each investment company calculates its net asset value based on the current market value for its portfolio holdings. Each investment company values securities and other instruments in a manner as described in that investment company's prospectus.

Management

Investment advisor

UBS Asset Management (Americas) Inc. ("UBS AM (Americas)") is a Delaware corporation with its principal business offices located at One North Wacker Drive, Chicago, IL 60606 and at 1285 Avenue of the Americas, New York, NY 10019. UBS AM (Americas) is an investment advisor registered with the SEC. UBS AM (Americas) serves as the investment advisor to the Funds by managing the investment of assets of each Fund. As of June 30, 2018, the Advisor had approximately $171 billion in assets under management. The Advisor is an indirect asset management subsidiary of UBS Group AG and a member of the UBS Asset Management Division, which had approximately $817 billion in assets under management as of June 30, 2018. UBS is an internationally diversified organization headquartered in Zurich, Switzerland, with operations in many areas of the financial services group of industries.

Portfolio management

The Advisor's investment professionals are organized into investment management teams, with a particular team dedicated to a specific asset class. Information is provided below for those portfolio managers within each investment management team that are primarily responsible for coordinating the day-to-day management of each Fund.

UBS Engage For Impact Fund

Bruno Bertocci and Joseph Elegante are the portfolio managers for the UBS Engage For Impact Fund and are jointly and primarily responsible for the day-to-day man-

agement of the Fund's portfolio. The portfolio managers have access to global analysts who are responsible for researching, projecting cash flow and providing a basis for determining which securities are selected for the Fund's portfolio. The portfolio managers work closely with the analysts to decide how to structure the UBS Engage For Impact Fund. Information about Messrs. Bertocci and Elegante is provided below.

Bruno Bertocci is Team Head of the Global Sustainable Equity team and a Managing Director at UBS Asset Management. Mr. Bertocci has over 33 years of industry experience and has been with UBS Asset Management for 15 years. Mr. Bertocci has been responsible for constructing and managing our global equity portfolios worldwide. Mr. Bertocci has been a portfolio manager of the Fund since inception.

Joe Elegante, CFA, is a member of the Global Sustainable Equity team and an Executive Director at UBS Asset Management. The Global Sustainable Equity team is responsible for constructing and managing global equity strategies. Mr. Elegante has over 20 years of portfolio management experience, including managing both institutional and private client portfolios. Prior to joining UBS Asset Management, Mr. Elegante was a portfolio manager at RMB Capital Management from 2012 to 2015 and a portfolio manager and senior vice president at AllianceBernstein from 2000 to 2012. Mr. Elegante has been a portfolio manager of the Fund since inception.

UBS Sustainable Development Bank Bond Fund

Matthias Dettwiler is the portfolio manager for UBS Sustainable Development Bank Bond Fund. Mr. Dettwiler has access to other members of the Fixed Income investment management team who may contribute to security selection and portfolio construction.

Matthias Dettwiler is Head of Index Fixed Income and has overall responsibility for all index tracking fixed income portfolios globally. Mr. Dettwiler is a Managing Director at UBS Asset Management and has been with UBS since 1995 and joined fixed income portfolio management in 2000. Mr. Dettwiler has been the portfolio manager of the Fund since inception.

The Funds' SAI provides information about the Funds' portfolio managers' compensation, other accounts man-

aged by the portfolio managers and the portfolio managers' ownership of Fund shares.

Advisory fees

The investment advisory fees (expressed as a monthly fee at an annual rate multiplied by the average daily net assets of the Funds) payable to the Advisor, before fee waivers and/or expense reimbursements, if applicable, by the Funds, are presented in the table below.

The Advisor has contractually agreed to waive its fees and/or reimburse certain expenses so that the ordinary operating expenses of the Funds (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) do not exceed the amounts listed in the footnotes to the Expense Tables. The contractual fee waiver and/or expense reimbursement agreement will remain in place for the period ending October 29, 2019. The contractual fee waiver agreement also provides that the Advisor is entitled to be reimbursed of fees it waived and/or expenses it reimbursed to the extent such reimbursement can be made during the three fiscal years following the date on which such expense reimbursements were made, provided that the reimbursement by a Fund of the Advisor will not cause the total operating expense ratio to exceed the lesser of the contractual limit as then may be in effect for that Fund (i) at the time of waiver or reimbursement or (ii) at the time of the recoupment.

The Funds have not yet commenced operations as of the date of this prospectus. A discussion regarding the basis for the Board of Trustees' approval of the investment advisory agreement between the Trust and Advisor on behalf of the Funds will be available in the Funds' semiannual report to shareholders for the period ending December 31.

	Advisory breakpoint schedule
Fund	Assets Under Management Fee	Fee
UBS Engage For Impact Fund	All		0.750	%
UBS Sustainable Development Bank Bond Fund	First $250 million		0.150	%
	On the next $250 million – $500 million		0.145
	On the next $500 million – $750 million		0.140
	On the next $750 million – $1 billion		0.135
	Above $1 billion		0.130

Administrator

UBS AM (Americas) is also the administrator of the Funds. Each Fund pays UBS AM (Americas) an annual contract rate of 0.075% of its average daily net assets for administrative services.

Disclosure of portfolio holdings

The UBS Engage For Impact Fund will generally post on its Web Site at http://www.ubs.com/us/en/asset_
management/individual_investors/mutual_fund.html, the ten largest equity portfolio holdings of the Fund, and the percentage that each of these holdings represents of the Fund's total assets, as of the most recent calendar quarter-end, 25 calendar days after the end of the calendar quarter. In addition, due to the recent launch of the Funds, the Funds will provide initial public disclosures of portfolio holdings on the Funds' Web Site at https://www.ubs.com/us/en/asset-management/individual-investors-and-financial-advisors/products/mutual_fund.html. Within five business days after the October 2018 month-end, each Fund will post a complete schedule of portfolio holdings as of October 31, 2018. Each Fund will file its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. The Funds' Forms N-Q are available on the SEC's Web Site at www.sec.gov. The Funds' Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the SEC's Public Reference Room may be obtained by calling 202-551 8090. Additionally, you may obtain copies of Forms N-Q from the Fund upon request by calling 1-800-647 1568.

Each Fund's complete schedule of portfolio holdings for the second and fourth quarters of each fiscal year is filed with the SEC on Form N-CSR and appears in the semiannual and annual reports, respectively, sent to shareholders. The semiannual and annual reports for the Funds will be posted on the Funds' Web Site at http://www.ubs.com/us/en/asset_management/
individual_investors/mutual_fund.html. Please consult the Funds' SAI for a description of the policies and procedures that govern disclosure of the Funds' portfolio holdings.

Dividends and taxes

Dividends and distributions

Each Fund intends to qualify each year as a regulated investment company under the Internal Revenue Code of 1986, as amended ("IRC"). As a regulated investment company, each Fund generally pays no federal income tax on the income and gains it distributes to you. The UBS Sustainable Development Bank Bond Fund expects to declare and distribute all of its net investment income, if any, to shareholders as dividends monthly, and the UBS Engage For Impact Fund expects to declare and distribute all of its net investment income, if any, to shareholders as dividends annually. Each Fund will distribute net realized capital gains, if any, at least annually, usually in December. A Fund may distribute such income dividends and capital gains more frequently, if necessary, in order to reduce or eliminate federal excise or income taxes on a Fund. The amount of any distribution will vary, and there is no guarantee a Fund will pay either an income dividend or a capital gains distribution.

Classes with higher expenses are expected to have lower income dividends.

You will receive income dividends and capital gain distributions in additional shares of the same class of a Fund unless you notify your investment professional or a Fund in writing that you elect to receive them in cash. Clients who own Fund shares through certain wrap fee programs may not have the option of electing to receive dividends in cash. Distribution options may be changed at any time by requesting a change in writing. Dividends and distributions are reinvested on the reinvestment date at the net asset value determined at the close of business on that date.

Annual statements—Each year, the Funds will send you an annual statement (Form 1099) of your account activity to assist you in completing your federal, state and local tax returns. Distributions declared in December to shareholders of record in such month, but paid in January, are taxable as if they were paid in December.

Prior to issuing your statement, the Funds make every effort to reduce the number of corrected forms mailed to you. However, if a Fund finds it necessary to reclassify its distributions or adjust the cost basis of any covered shares sold or exchanged after you receive your tax

statement, the Fund will send you a corrected Form 1099.

Avoid "buying a dividend"—At the time you purchase your Fund shares, a Fund's net asset value may reflect undistributed income, undistributed capital gains, or net unrealized appreciation in value of portfolio securities held by the Fund. For taxable investors, a subsequent distribution to you of such amounts, although constituting a return of your investment, would be taxable. Buying shares in a Fund just before it declares an income dividend or capital gains distribution is sometimes known as "buying a dividend."

Taxes

Fund distributions—Each Fund expects, based on its investment objective and strategies, that its distributions, if any, will be taxable as ordinary income, capital gains, or some combination of both. This is true whether you reinvest your distributions in additional Fund shares or receive them in cash.

For federal income tax purposes, Fund distributions of short-term capital gains are taxable to you as ordinary income. Fund distributions of long-term capital gains are taxable to you as long-term capital gains no matter how long you have owned your shares. A portion of income dividends reported by a Fund may be qualified dividend income eligible for taxation by individual shareholders at long-term capital gain rates, provided certain holding period requirements are met. However, because the income of the UBS Sustainable Development Bank Bond Fund is derived from investments earning interest rather than dividend income, generally none or only a small portion of the income dividends paid to you by the Fund is anticipated to be qualified dividend income eligible for taxation by individuals at long-term capital gain tax rates.

The use of derivatives by a Fund may cause the Fund to realize higher amounts of ordinary income or short-term capital gain, distributions from which are taxable to individual shareholders at ordinary income tax rates rather than at the more favorable tax rates for long-term capital gain.

If a Fund qualifies to pass through to you the tax benefits from foreign taxes it pays on its investments, and elects to do so, then any foreign taxes it pays on these

investments may be passed through to you as a foreign tax credit.

Sale or redemption of Fund shares—If you are a taxable investor, when you sell or redeem your shares in the Fund, you may realize a capital gain or loss. For tax purposes, an exchange of your Fund shares for shares of a different Fund is the same as a sale. Any loss incurred on the sale or exchange of Fund shares held for six months or less will be treated as a long-term capital loss to the extent of capital gain distributions received with respect to such shares. Each Fund is required to report to you and the Internal Revenue Service ("IRS") annually on Form 1099-B not only the gross proceeds of Fund shares you sell or redeem but also the cost basis. Cost basis will be calculated using the Funds' default method of average cost, unless you instruct a Fund to use a different calculation method. Shareholders should carefully review the cost basis information provided by a Fund and make any additional basis, holding period or other adjustments that are required when reporting these amounts on their federal income tax returns. If your account is held by your investment representative (financial advisor or other broker), please contact that representative with respect to reporting of cost basis and available elections for your account. Their default method for cost basis reporting may be different than the Fund's default method. Tax-advantaged retirement accounts will not be affected.

Medicare tax—An additional 3.8% Medicare tax is imposed on certain net investment income (including ordinary dividends and capital gain distributions received from a Fund and net gains from redemptions or other taxable dispositions of Fund shares) of US individuals, estates and trusts to the extent that such person's "modified adjusted gross income" (in the case of an individual) or "adjusted gross income" (in the case of an estate or trust) exceeds a threshold amount. This Medicare tax, if applicable, is reported by you on, and paid with, your federal income tax return.

Backup withholding—By law, if you do not provide a Fund with your proper taxpayer identification number and certain required certifications, you may be subject to backup withholding on any distributions of income, capital gains, or proceeds from the sale of your shares. A Fund also must withhold if the IRS instructs it to do so. When withholding is required, the amount will be 24% of any distributions or proceeds paid.

State and local taxes—Fund distributions and gains from the sale or exchange of your Fund shares generally are subject to state and local taxes.

Non-US investors—Non-US investors may be subject to US withholding tax at a 30% or lower treaty rate and US estate tax and are subject to special US tax certification requirements to avoid backup withholding and claim any treaty benefits. Exemptions from US withholding tax are provided for certain capital gain dividends paid by a Fund from net long-term capital gains, interest-related dividends paid by a Fund from its qualified net interest income from US sources and short-term capital gain dividends, if such amounts are reported by a Fund. However, any such dividends and distributions of income and capital gains will be subject to backup withholding at a rate of 24% if you fail to properly certify that you are not a US person.

Other reporting and withholding requirements—Under the Foreign Account Tax Compliance Act ("FATCA"), a Fund will be required to withhold a 30% tax on the following payments or distributions made by the Fund to

certain foreign entities, referred to as foreign financial institutions or non-financial foreign entities, that fail to comply (or be deemed compliant) with extensive reporting and withholding requirements designed to inform the US Department of the Treasury of US-owned foreign investment accounts: (a) income dividends and (b) after December 31, 2018, certain capital gain distributions, return of capital distributions and the proceeds arising from the sale of Fund shares. A Fund may disclose the information that it receives from its shareholders to the IRS, non-US taxing authorities or other parties as necessary to comply with FATCA or similar laws. Withholding also may be required if a foreign entity that is a shareholder of a Fund fails to provide the Fund with appropriate certifications or other documentation concerning its status under FATCA.

This discussion of "Dividends and taxes" is not intended or written to be used as tax advice. Because everyone's tax situation is unique, you should consult your tax professional about federal, state, local, or foreign tax consequences before making an investment in a Fund.

Financial highlights

No financial information is presented for the Funds as they were not publicly offered prior to the date of this prospectus.

Funds' privacy notice

This notice describes the privacy policy of the UBS Family of Funds, the PACE Funds and all closed-end funds managed by UBS Asset Management (collectively, the "Funds"). The Funds are committed to protecting the personal information that they collect about individuals who are prospective, current or former investors.

The Funds collect personal information in order to process requests and transactions and to provide customer service. Personal information, which is obtained from applications and other forms or correspondence submitted to the Funds, may include name(s), address, e-mail address, telephone number, date of birth, social security number or other tax identification number, bank account information, information about your transactions and experiences with the Funds, and any affiliation a client has with UBS Financial Services Inc. or its affiliates ("Personal Information").

The Funds limit access to Personal Information to those individuals who need to know that information in order to process transactions and service accounts. These individuals are required to maintain and protect the confidentiality of Personal Information and to follow established procedures. The Funds maintain physical, electronic and procedural safeguards to protect Personal Information and to comply with applicable laws and regulations.

The Funds may share Personal Information with their affiliates to facilitate the servicing of accounts and for other business purposes, or as otherwise required or permitted by applicable law. The Funds may also share Personal Information with non-affiliated third parties that perform services for the Funds, such as vendors that provide data or transaction processing, computer software maintenance and development, and other administrative services. When the Funds share Personal Information with a non-affiliated third party, they will do so pursuant to a contract that includes provisions designed to ensure that the third party will uphold and maintain privacy standards when handling Personal Information. In addition to sharing information with non-affiliated third parties to facilitate the servicing of accounts and for other business purposes, the Funds may disclose Personal Information to non-affiliated third parties as otherwise required or permitted by applicable law. For example, the Funds may disclose Personal Information to credit bureaus or regulatory authorities to facilitate or comply with investigations; to protect against or prevent actual or potential fraud, unauthorized transactions, claims or other liabilities; or to respond to judicial or legal process, such as subpoena requests.

Except as described in this privacy notice, the Funds will not use Personal Information for any other purpose unless the Funds describe how such Personal Information will be used and clients are given an opportunity to decline approval of such use of Personal Information relating to them (or affirmatively approve the use of Personal Information, if required by applicable law). The Funds endeavor to keep their customer files complete and accurate. The Funds should be notified if any Personal Information needs to be corrected or updated. Please call 1-800-647 1568 with any questions or concerns regarding your Personal Information or this privacy notice.

UBS Asset Management, Americas Region

Business Continuity Planning Overview

UBS Asset Management affiliates UBS Asset Management (US) and UBS Asset Management (Americas) protect information assets, processes, and customer data from unpredictable events through preparation and testing of a comprehensive business continuity capability. This capability seeks recovery of the technology infrastructure and information, and prevention of the loss of company or customer information and transactions. In the event of a crisis scenario, we will recover those functions deemed to be critical to our business and our clients, and strive to resume processing within predefined time frames following a disaster declaration (typically 4-6 hours). Business continuity processes provide us the ability to continue critical business functions regardless of the type, scope, or duration of a localized event. However, these processes are dependent upon various external resources, such as regional telecommunications, transportation networks, and other public utilities.

Essential elements of the business continuity plan include:

• Crisis communication procedures—Action plans for coordinating essential communications for crisis management leaders, employees, and key business partners

• Information technology backup and recovery procedures—Comprehensive technology and data management plans designed to protect the integrity and quick recovery of essential technology infrastructure and data

• Disaster recovery site—Alternative dedicated workspace, technology infrastructure, and systems support that is fully operational during a disaster declaration

• Testing regimen—The business continuity plan is reviewed on an annual basis, including the disaster recovery facility. In addition, all IT application recovery plans are updated and tested annually

Appendix A

Intermediary-Specific Sales Charge Waivers and Discounts

The availability of certain sales charge waivers and discounts will depend on whether you purchase your shares directly from the funds or through a financial intermediary. Intermediaries identified in this Appendix A may have different policies and procedures regarding the availability of front-end sales load waivers or contingent deferred (back-end) sales load ("CDSC") waivers, which are discussed below. In all instances, it is the purchaser's responsibility to notify the funds or the purchaser's financial intermediary at the time of purchase of any relationship or other facts qualifying the purchaser for sales charge waivers or discounts. For waivers and discounts not available through a particular intermediary, shareholders will have to purchase fund shares directly from the funds or through another intermediary to receive these waivers or discounts.

*****

Shareholders purchasing fund shares through a Merrill Lynch platform or account are eligible only for the following load waivers (front-end sales charge waivers and contingent deferred, or back-end, sales charge waivers) and discounts, which may differ from those disclosed elsewhere in the funds' prospectus or SAI

Front-end Sales Load Waivers on Class A Shares available at Merrill Lynch

Employer-sponsored retirement, deferred compensation and employee benefit plans (including health savings accounts) and trusts used to fund those plans, provided that the plan is a group plan (more than one participant), the shares are not held in a commission-based brokerage account and shares are held in the name of the plan through an omnibus account

Shares purchased by or through a 529 Plan

Shares purchased through a Merrill Lynch affiliated investment advisory program

Shares purchased by third party investment advisors on behalf of their advisory clients through Merrill Lynch's platform

Shares of funds purchased through the Merrill Edge Self-Directed platform (if applicable)

Shares purchased through reinvestment of capital gains distributions and dividend reinvestment when purchasing shares of the same fund (but not any other fund within the fund family (fund family includes UBS Funds, UBS U.S. Allocation Fund and other funds for which UBS Asset Management (US) Inc. serves as principal underwriter))

Employees and registered representatives of Merrill Lynch or its affiliates and their family members

Directors or Trustees of the funds, and employees of the funds' investment adviser or any of its affiliates, as described in this prospectus

Shares purchased from the proceeds of redemptions within the same fund family, provided (1) the repurchase occurs within 90 days following the redemption, (2) the redemption and purchase occur in the same account, and (3) redeemed shares were subject to a front-end or deferred sales load (known as rights of reinstatement)

CDSC Waivers on A available at Merrill Lynch

Death or disability of the shareholder

Shares sold as part of a systematic withdrawal plan as described in the funds' prospectus

Return of excess contributions from an IRA Account

Shares sold as part of a required minimum distribution for IRA and retirement accounts due to the shareholder reaching age 70 1/2

Shares sold to pay Merrill Lynch fees but only if the transaction is initiated by Merrill Lynch

There will be no CDSC charged on the sale of fund shares acquired through a right of reinstatement

Shares held in retirement brokerage accounts, that are exchanged for a lower cost share class due to transfer to certain fee based accounts or platforms

A-1

Front-end load Discounts Available at Merrill Lynch:
Breakpoints, Rights of Accumulation & Letters of Intent

Breakpoints as described in this prospectus

Rights of Accumulation (ROA) which entitle shareholders to breakpoint discounts will be automatically calculated based on the aggregated holding of fund family assets held by accounts within the purchaser's household at Merrill Lynch. Eligible fund family assets not held at Merrill Lynch may be included in the ROA calculation only if the shareholder notifies his or her financial advisor about such assets

Letters of Intent (LOI) which allow for breakpoint discounts based on anticipated purchases within a fund family, through Merrill Lynch, over a 13-month period of time (if applicable)

Effective July 1, 2018, shareholders purchasing fund shares through a Morgan Stanley Wealth Management transactional brokerage account will be eligible only for the following front-end sales charge waivers with respect to Class A shares, which may differ from and may be more limited than those disclosed elsewhere in the funds' prospectus or SAI.

Front-end Sales Load Waivers on Class A Shares available at Morgan Stanley Wealth Management

Employer-sponsored retirement plans (e.g., 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit sharing and money purchase pension plans and defined benefit plans). For purposes of this provision, employer-sponsored retirement plans do not include SEP IRAs, Simple IRAs, SAR-SEPs or Keogh plans

Morgan Stanley employee and employee-related accounts according to Morgan Stanley's account linking rules

Shares purchased through reinvestment of dividends and capital gains distributions when purchasing shares of the same fund

Shares purchased through a Morgan Stanley self-directed brokerage account

Shares purchased from the proceeds of redemptions within the same fund family, provided (i) the repurchase occurs within 90 days following the redemption, (ii) the redemption and purchase occur in the same account, and (iii) redeemed shares were subject to a front-end or deferred sales charge

A-2

If you want more information about the Funds, the following documents are available free upon request:

Annual/Semiannual Reports

Additional information about the Funds' investments will be available in the Fund's annual and semiannual reports to shareholders. In the Funds' annual reports, you will find a discussion of the market conditions and investment strategies that significantly affected the Funds' performance during the last fiscal year. As of the date of this prospectus, the annual and semiannual reports were not yet available for the Funds because the Funds had not yet commenced operations.

Statement of Additional Information (SAI)

The SAI provides more detailed information about the Funds and is incorporated by reference into this prospectus (i.e., it is legally considered a part of this prospectus).

When available, you may obtain free copies of the Funds' annual and semiannual reports and the SAI, and discuss your questions about the Funds, by contacting the Funds directly at 1-800-647 1568, or by contacting your investment professional. The annual and semiannual reports and the SAI may also be obtained, free of charge, by accessing the documents on the Funds' Web Site at http://www.ubs.com/us/en/asset_management/
individual_investors/mutual_fund.html.

You may review and copy information about the Funds, including shareholder reports and the SAI, at the Public Reference Room of the US Securities and Exchange Commission (SEC) in Washington, D.C. You may obtain information about the operations of the SEC's Public Reference Room by calling the SEC at 202-551 8090. You may get copies of reports and other information about the Funds:

• For a fee, by electronic request at [email protected] or by writing the SEC's Public Reference Section, Washington, D.C. 20549-1520; or

• Free from the EDGAR Database on the SEC's Internet Web Site at: http://www.sec.gov.

The UBS Funds

Investment Company Act File No. 811-6637

UBS Asset Management (Americas) Inc.

is a subsidiary of UBS Group AG.

S1697

The UBS Funds

Statement of Additional Information | October 23, 2018

One North Wacker Drive
Chicago, Illinois 60606

This Statement of Additional Information ("SAI") relates to the Class A and Class P shares of the following funds (each a "Fund", and collectively, the "Funds"), which are series of The UBS Funds, an open-end management investment company (the "Trust"):

	Class A	Class P
UBS Engage For Impact Fund	UEIAX	UEIPX
UBS Sustainable Development Bank Bond Fund	UDBAX	UDBPX

UBS Asset Management (Americas) Inc. ("UBS AM (Americas)"), an indirect asset management subsidiary of UBS Group AG, serves as the investment advisor and administrator for the Funds. UBS Asset Management (US) Inc. ("UBS AM (US)") serves as the underwriter for the Funds. UBS AM (US) is an indirect wholly owned subsidiary of UBS Group AG.

This SAI is not a prospectus and should be read only in conjunction with the Funds' current Prospectus, dated October 23, 2018. A copy of the Prospectus may be obtained by calling your investment professional or by calling the Trust toll-free at 1-800-647 1568. The Prospectus contains more complete information about the Funds. You should read it carefully before investing.

Table of contents	Page
General information about the Trust		4
Diversification status		4
General definitions		4
Investment strategies		5
Investments relating to the Funds		5
Cash and cash equivalents		5
Repurchase agreements		5
Reverse repurchase agreements		6
Borrowing		6
Loans of portfolio securities		7
Futures		8
Options on futures contracts		10
Risks of potential regulation of swaps and other derivatives		11
Special risks of certain derivatives		11
Commodity pool operator exclusion		11

Table of contents	Page
Illiquid securities		12
Rule 144A		12
Non-publicly traded securities, private placements and restricted securities		13
Regulation S Securities		13
Investment company securities and investments in affiliated investment companies		14
Foreign securities		14
Emerging markets investments		15
Risks of investing in emerging markets		16
Issuer location		18
Short sales		18
Investments relating to UBS Engage For Impact Fund		19
Equity securities		19
Swaps		19
Forward foreign currency contracts		22
Non-deliverable forwards		23
Options		24
Index options		26
Special risks of options on indices		26
Options on swap agreements		27
Exchange-traded notes ("ETNs")		27
Options on foreign currencies		27
Convertible securities		28
Exchange-traded funds ("ETFs")		29
Real estate investment trusts		30
Special purpose acquisition companies ("SPACs")		30
Equity participation notes or equity linked notes ("EPNs")		30
Investments relating to UBS Sustainable Development Bank Bond Fund		31
Fixed income securities		31
Yield factors		32
Duration		32
Development bank bonds		33
Eurodollar securities		33
Floating rate and variable rate obligations		33
When-issued and delayed delivery securities		34
Asset-backed securities		34
Zero coupon and delayed interest securities		36
Other investments		37
Summary of risks		37
Cybersecurity risk		37
Investment restrictions		37
Management of the Trust		39

Table of contents	Page
Independent trustees		42
Officers		44
Information about Independent trustee ownership of securities issued by UBS AM		46
Information about trustee ownership of Fund shares		46
Compensation table		47
Principal holders of securities		47
Investment advisory, principal underwriting and other service arrangements		48
Advisor		48
Portfolio managers		49
Administrative, accounting and custody services		51
Principal underwriting arrangements		52
Transfer agency services		53
Independent registered public accounting firm		53
Legal counsel		54
Personal trading policies		54
Proxy voting policies		54
Portfolio holdings disclosure policies and procedures		55
Bank line of credit		59
Portfolio transactions and brokerage commissions		59
Portfolio turnover		60
Shares of beneficial interest		61
Reduced sales charges, additional purchase, exchange and redemption information and other services		62
Sales charge reductions and waivers		62
Additional information regarding purchases through letter of intent		64
Automatic cash withdrawal plan		65
Individual retirement accounts		66
Transfer of securities		66
Valuation of shares		66
Taxes		68
Taxation of the Fund		68
Taxation of Fund distributions		71
Sales, exchanges and redemptions of Fund shares		73
Tax treatment of portfolio transactions		76
Backup withholding		80
Non-US investors		80
Effect of future legislation; local tax considerations		82
Potential conflicts of interest		83
Performance calculations		91
Securities lending		91
Financial statements and report of independent registered public accounting firm		92
Appendix A—Debt ratings		A-1

General information about the Trust

The Trust currently offers shares of the following ten funds, representing separate portfolios of investments: UBS Dynamic Alpha Fund, UBS Emerging Markets Equity Opportunity Fund, UBS Engage For Impact Fund, UBS Global Allocation Fund, UBS International Sustainable Equity Fund, UBS U.S. Small Cap Growth Fund, UBS Sustainable Development Bank Bond Fund, UBS U.S. Sustainable Equity Fund, UBS Municipal Bond Fund and UBS Total Return Bond Fund. The UBS Dynamic Alpha Fund, UBS Emerging Markets Equity Opportunity Fund, UBS Global Allocation Fund, UBS International Sustainable Equity Fund, UBS U.S. Small Cap Growth Fund, UBS U.S. Sustainable Equity Fund, UBS Municipal Bond Fund and UBS Total Return Bond Fund are offered in separate Prospectuses and SAIs, and are not included in this SAI. This SAI relates to Class A and Class P shares of the UBS Engage For Impact Fund and the UBS Sustainable Development Bank Bond Fund (each a "Fund" and collectively, the "Funds") only. Each Fund offers Class A and Class P shares. The UBS Sustainable Development Bank Bond Fund also offers Class P2 shares, which are offered in a separate prospectus and SAI. Class A shares of UBS Engage For Impact Fund have a front-end sales charge, a contingent deferred sales charge ("CDSC") on purchases over $1 million and sold within one year of the purchase date, and are subject to annual 12b-1 plan service fees of 0.25% of average daily net assets of the UBS Engage For Impact Fund. Class A Shares of UBS Sustainable Development Bank Bond Fund are not subject to a front-end sales load and are subject to annual 12b-1 plan service fees of 0.10% of average daily net assets of the UBS Sustainable Development Bank Bond Fund. Class P shares, which are designed primarily for institutional investors and wrap fee advisory accounts, have no sales charges and are not subject to annual 12b-1 plan expenses. The Trust is a Delaware statutory trust organized on August 13, 1993.

Diversification status

The UBS Engage For Impact Fund is "diversified" as that term is defined in the Investment Company Act of 1940, as amended (the "Act"). The Sustainable Development Bank Bond Fund is classified as "non-diversified" for purposes of the Act, which means that the Fund is not limited by the Act with regard to the portion of its assets that may be invested in the securities of a single issuer. To the extent that a non-diversified Fund makes investments in excess of 5% of its total assets in the securities of a particular issuer, its exposure to the risks associated with that issuer is increased. Because the non-diversified Fund may invest in a limited number of issuers, the performance of particular securities may adversely affect the performance of the Fund or subject the Fund to greater price volatility than that experienced by diversified investment companies.

General definitions

As used throughout this SAI, the following terms shall have the meanings listed:

"Act" shall mean the Investment Company Act of 1940, as amended.

"Administrator" or "UBS AM (Americas)" shall mean UBS Asset Management (Americas) Inc., which serves as the Funds' administrator.

"Advisor" or "UBS AM (Americas)" shall mean UBS Asset Management (Americas) Inc., which serves as the Funds' investment advisor.

"Board" shall mean the Board of Trustees of the Trust.

"Code" shall mean the Internal Revenue Code of 1986, as amended.

"Family Funds" shall mean the Fund and other funds for which UBS Asset Management (US) Inc. or any of its affiliates serves as principal underwriter.

"Funds" shall mean the UBS Engage For Impact Fund and UBS Sustainable Development Bank Bond Fund (or individually, a "Fund").

"Fitch" shall mean Fitch Ratings, Inc.

"Moody's" shall mean Moody's Investors Service, Inc.

"SEC" shall mean the US Securities and Exchange Commission.

"S&P" shall mean Standard & Poor's Financial Services LLC.

"Trust" shall mean The UBS Funds, an open-end management investment company registered under the Act.

"Underwriter" or "UBS AM (US)" shall mean UBS Asset Management (US) Inc., which serves as the Funds' underwriter.

"1933 Act" shall mean the Securities Act of 1933, as amended.

Investment strategies

The following discussion of investment techniques and instruments supplements and should be read in conjunction with the investment objectives and policies set forth in the Funds' Prospectus. The investment practices described below, except for the discussion of percentage limitations with respect to portfolio loan transactions and borrowing, are not fundamental and may be changed by the Board without the approval of the shareholders.

Investments relating to the Funds

Cash and cash equivalents

Each Fund may invest a portion of its assets in short-term debt securities (including repurchase agreements and reverse repurchase agreements) of corporations, governments and their agencies and instrumentalities and banks and finance companies, which may be denominated in any currency. The Funds may also invest a portion of their assets in shares issued by money market mutual funds. When unusual market conditions warrant, the Funds may make substantial temporary defensive investments in cash equivalents up to a maximum of 100% of its net assets. Cash equivalent holdings may be in any currency (although any such non-US holdings may not constitute "cash or cash equivalents" for tax diversification purposes under the Code). When a Fund invests for defensive purposes, it may affect the attainment of the Fund's investment objective.

Pursuant to the rules and regulations under the Act and any exemptive orders issued thereunder, the Fund may invest cash: (i) held for temporary defensive purposes; (ii) not invested pending investment in securities; (iii) that is set aside to cover an obligation or commitment of the Fund to purchase securities or other assets at a later date; and (iv) to be invested on a strategic management basis in one or more money market funds or other pooled investment vehicles, including other funds sponsored by UBS AM (US).

Repurchase agreements

When a Fund enters into a repurchase agreement, it purchases securities from a bank or broker-dealer that simultaneously agrees to repurchase the securities at a mutually agreed upon time and price or upon demand, thereby determining the yield during the term of the agreement. As a result, a repurchase agreement provides a fixed rate

of return insulated from market fluctuations during the term of the agreement. The term of a repurchase agreement generally is short, possibly overnight or for a few days, although it may extend over a number of months (up to one year) from the date of delivery. Repurchase agreements are considered under the Act to be collateralized loans by a Fund to the seller secured by the securities transferred to the Fund. In accordance with the Act, repurchase agreements will be fully collateralized and the collateral will be marked-to-market daily. The Funds consider a repurchase agreement having more than seven days remaining to maturity as illiquid and will not enter into such repurchase agreement if, as a result, the Fund would have invested more than 15% of its net assets in illiquid investments that are assets.

Repurchase agreements are securities, and may be treated as "Government Securities" as defined in the Act, if fully collateralized with such securities, for purposes of the tax diversification requirement that must be met for a Fund to qualify for pass-through treatment under the Code. Accordingly, the Fund will limit the value of its repurchase agreements on each of the quarterly testing dates to ensure compliance with Subchapter M of the Code.

Reverse repurchase agreements

Reverse repurchase agreements involve sales of portfolio securities of the Fund to member banks of the Federal Reserve System or securities dealers believed creditworthy, concurrently with an agreement by the Fund to repurchase the same securities at a later date at a fixed price which is generally equal to the original sales price plus interest. The Fund retains record ownership and the right to receive interest and principal payments on the portfolio securities involved. In connection with each reverse repurchase transaction, the Fund's custodian will maintain Segregated Assets in an amount equal to the repurchase price (inclusive of interest charges). The cover amount for a reverse repurchase agreement that lacks a specified repurchase price is an amount equal to the value of the proceeds received on any sale subject to repurchase plus accrued interest beginning on the date the Fund enters into the reverse repurchase agreement.

A reverse repurchase agreement involves the risk that the market value of the securities retained by a Fund may decline below the price of the securities the Fund has sold but is obligated to repurchase under the agreement. In the event the buyer of securities under a reverse repurchase agreement files for bankruptcy or becomes insolvent, the Fund's use of the proceeds of the agreement may be restricted pending a determination by the other party, or its trustee or receiver, whether to enforce the Fund's obligation to repurchase the securities. Reverse repurchase agreements are considered borrowings by the Funds and as such, are subject to the same investment limitations.

Borrowing

The Funds may borrow money for temporary emergency or extraordinary purposes, or to facilitate redemptions. The Fund will not borrow money in excess of 33¹/₃% of the value of its total assets (including amounts borrowed, but reduced by any liabilities not constituting senior securities). Any borrowing will be done from a bank with the required asset coverage of at least 300%. In the event that such asset coverage shall at any time fall below 300%, a Fund shall, within three days thereafter (not including Sundays or holidays), or such longer period as the SEC may prescribe by rules and regulations, reduce the amount of its borrowings to such an extent that the asset coverage of such borrowings shall be at least 300%.

Segregation of assets—Financial instruments that involve the Fund's obligation to make future payments to third parties will not be viewed as creating any senior security provided that the Fund covers its obligations as described below. Those financial instruments can include, among others, (i) reverse repurchase agreements, (ii) when-issued and delayed delivery securities, (iii) dollar rolls, (iv) to-be-announced securities, (v) securities sold short (vi) swaps, (vii) futures contracts, (viii) written options, (ix) forward currency contracts, and (x) non-deliverable forwards.

has approved, govern the kinds of transactions that can be deemed to be offsetting positions for purposes of (1) above, and the amounts of assets that need to be segregated for purposes of (2) above (segregated assets procedures). Any assets designated as segregated by the Fund, either physically or "earmarked" as segregated, for purposes of (2) above shall be liquid, unencumbered and marked-to-market daily (any such assets designated as segregated, either physically or "earmarked" as segregated, are referred to in this SAI as "Segregated Assets"), and such Segregated Assets shall be maintained in accordance with pertinent positions of the SEC.

The SEC has proposed a new rule which, if adopted, would replace current SEC and staff guidance with respect to asset segregation requirements for derivatives and other instruments such as reverse repurchase agreements, short sales, firm or standby commitment agreements and similar agreements. While it is not possible to fully predict the effects of the proposed regulation, the Advisor will continue to monitor developments as they apply to the Fund.

The Fund's segregated assets procedures may require the Fund to sell a portfolio security or exit a transaction, including a transaction in a financial instrument, at a disadvantageous time or price in order for the Fund to be able to segregate the required amount of assets. If Segregated Assets decline in value, the Fund will need to segregate additional assets or reduce its position in the financial instruments. In addition, Segregated Assets may not be available to satisfy redemptions or for other purposes, until the Fund's obligations under the financial instruments have been satisfied. In addition, the Fund's ability to use the financial instruments identified above may under some circumstances depend on the nature of the instrument and amount of assets that the segregated assets procedures require the Fund to segregate. The segregated assets procedures provide that for futures and forward contracts that require only cash settlement, and swap agreements that call for periodic netting between the Fund and its counterparty, the segregated amount is the net amount due under the contract, as determined daily on a mark-to-market basis. For other kinds of futures, forwards and swaps, the Fund must segregate a larger amount of assets to cover its obligations, which essentially limits the Fund's ability to use these instruments. If the SEC staff changes its positions concerning the segregation of the net amount due under certain forwards, futures and swap contracts, the ability of the Fund to use the financial instruments could be negatively affected.

Loans of portfolio securities

The Funds may lend portfolio securities to qualified broker-dealers and financial institutions pursuant to agreements, provided the following conditions are satisfied: (1) the loan is secured continuously by collateral marked-to-market daily as described below; (2) a Fund may call the loan at any time and receive the securities loaned; (3) a Fund will receive any interest, dividends or other distributions paid on the loaned securities; and (4) the aggregate market value of securities loaned will not at any time exceed 33¹/₃% of the market value of a Fund's total assets. However, as a non-fundamental policy, a Fund may not enter into a securities loan if, after giving effect thereto, portfolio securities having a value in excess of 30% of the market value of the Fund's total assets would be subject to securities loans.

When loaning portfolio securities, a Fund will initially require the borrower to provide the Fund with collateral in an amount at least equal to 102% of the market value of the loaned securities with respect to domestic securities or 105% of the market value of the loaned securities with respect to foreign securities provided that loans of "Government Securities" as defined in the Act may be collateralized at 100%. Thereafter, collateral will generally be maintained in an amount at least equal to 102% of the value of the securities loaned with respect to domestic securities, 105% of the value of the securities loaned with respect to foreign securities or 100% of the value of the securities loaned with respect to "Government Securities." Occasionally, for certain securities, the market value of the collateral may fall below the collateral amount stated above by a de minimis amount for a period of time. However, at no time will the market value of the collateral fall below the market value of the loaned securities with respect to domestic securities or 102% of the value of the loaned securities with respect to foreign securities.

Collateral may consist of cash or "Government Securities" as defined in the Act. Pursuant to rules and regulations under the Act, under normal conditions, the Funds invest cash collateral from securities lending activities into a

money market fund. In addition, cash collateral may be invested in repurchase agreements. In the case that voting or consent rights that accompany a loaned security pass to the borrower, a Fund will recall the loaned security to permit the exercise of such rights if the matter involved would have a material effect on the Fund's investment in the security.

Loans of securities involve a risk that the borrower may fail to return the securities or may fail to maintain the proper amount of collateral, which may result in a loss of money by a Fund or a delay in recovering the loaned securities. In addition, in the event of bankruptcy of the borrower, a Fund could experience delays in recovering the loaned securities or only recover cash or a security of equivalent value. Therefore, a Fund will only enter into portfolio loans after a review of all pertinent factors by the Advisor under the supervision of the Board, including the creditworthiness of the borrower and then only if the consideration to be received from such loans would justify the risk. Creditworthiness will be monitored on an ongoing basis by the Advisor.

Futures

The Funds may enter into contracts for the purchase or sale for future delivery of securities and indices. UBS Engage For Impact Fund may also enter into contracts for the purchase or sale for future delivery of foreign currencies.

When a Fund enters into a futures transaction, it must deliver to the FCM selected by the Fund, an amount referred to as "initial margin." The initial margin is required to be deposited in cash or government securities with an FCM. Minimum initial margin requirements are established by the futures exchange and FCMs may establish initial margin requirements that are higher than the exchange requirements. After a futures contract position is opened, the value of the contract is marked-to-market daily. If a futures contract price changes to the extent that the margin deposit does not satisfy margin requirements, payment of a "variation margin" to be held by the FCM, will be required. Conversely, a reduction in the contract value may reduce the required margin, resulting in a repayment of excess margin to the custodial accounts of a Fund. The Funds may also effect futures transactions through FCMs who are affiliated with the Advisor or the Funds in accordance with procedures adopted by the Board. Because all transactions in the futures market are made, offset or fulfilled by an FCM through a clearinghouse associated with the exchange on which the contracts are traded, a Fund will incur brokerage fees when it buys or sells futures contracts.

The Funds will enter into futures transactions on domestic exchanges and, to the extent such transactions have been approved by the CFTC for sale to customers in the United States, on foreign exchanges. In addition, a Fund may sell stock index futures in anticipation of or during a market decline to attempt to offset the decrease in market value of its common stocks that might otherwise result; and they may purchase such contracts in order to offset increases in the cost of common stocks that they intend to purchase. Although some futures contracts by their terms require the actual delivery or acquisition of the underlying instrument or asset, some require cash settlement. Where futures contracts provide for the delivery of securities, deliveries usually do not occur. Futures contracts can be terminated by entering into offsetting transactions.

Each Fund will cover its obligations under the futures transactions in which it participates by either (i) holding offsetting positions that appropriately equal the daily market value of the particular Fund's position in the futures contract (less the initial margin and any variation margins deposited with an FCM); or (ii) accruing such amounts on a daily basis and maintaining Segregated Assets to cover the futures contract. With respect to a futures contract that is not

contractually required to "cash-settle," a Fund must cover its open position by maintaining Segregated Assets equal to the contract's full, notional value. However, the Fund may net non-cash settled futures contracts if the futures have the same expiration date and underlying instruments. With respect to a futures contract that is contractually required to "cash-settle" the Fund is permitted to maintain Segregated Assets in an amount equal to the Fund's daily marked-to-market (net) obligation (i.e., the Fund's daily net liability, if any) rather than the notional value (in other words, the initial margin plus any variation margin (unrealized loss) due based on the previous day's trading). The total cover required for all cash-settled futures contracts may be determined by netting the aggregate obligations of such contracts. By setting aside assets equal to only its net obligation under cash-settled future contracts, a Fund will have the ability to employ leverage to a greater extent than if the Fund were required to segregate assets equal to the full notional value of such contracts. The value of any liquid assets held as initial or variation margin with an FCM for a cash-settled or non-settled futures contract may be deemed physically segregated or earmarked for "cover" purposes so long as such assets are held in compliance with Rule 17f-6 under the Act.

The Funds may enter into futures contracts to protect against the adverse effects of fluctuations in security prices, interest rates or, for UBS Engage For Impact Fund, foreign exchange rates without actually buying or selling the securities or foreign currency. For example, if interest rates are expected to increase, a Fund might enter into futures contracts for the sale of debt securities. Such a sale would have much the same effect as selling an equivalent value of the debt securities owned by the Fund. If interest rates did increase, the value of the debt securities in the portfolio would decline, but the value of the futures contracts to the Fund would increase at approximately the same rate, thereby keeping the net asset value of the Fund from declining as much as it otherwise would have. Similarly, when it is expected that interest rates may decline, futures contracts may be purchased to hedge in anticipation of subsequent purchases of securities at higher prices. Because fluctuations in the value of futures contracts should be similar to those of debt securities, a Fund could take advantage of the anticipated rise in value of debt securities without actually buying them until the market had stabilized. At that time, the futures contracts could be liquidated, and the Fund could then buy debt securities on the cash market. The Funds may also enter into futures contracts as a low cost method for gaining or reducing exposure to a particular currency or securities market without directly investing in those currencies or securities.

To the extent that market prices move in an unexpected direction, a Fund may not achieve the anticipated benefits of futures contracts or may realize a loss. For example, if a Fund is hedged against the possibility of an increase in interest rates, which would adversely affect the price of securities held in its portfolio, and interest rates decrease instead, the Fund would lose part or all of the benefit of the increased value that it has because it would have offsetting losses in its futures position. In addition, in such situations, if the Fund had insufficient cash, it may be required to sell securities from its portfolio to meet daily variation margin requirements. Such sales of securities may, but will not necessarily, be at increased prices that would reflect the rising market. A Fund may be required to sell securities at a time when it may be disadvantageous to do so.

Futures exchanges may also limit the amount of fluctuation permitted in certain futures contract prices during a single trading day. This daily limit establishes the maximum amount that the price of a futures contract may vary either up or down from the previous day's settlement price. Once the daily limit has been reached in a futures contract subject to the limit, no more trades may be made on that day at a price beyond that limit. The daily limit governs only price movements during a particular trading day and does not limit potential losses because the limit may prevent the liquidation of unfavorable positions. For example, futures prices have occasionally moved to the daily limit for several consecutive trading days with little or no trading, thereby preventing prompt liquidation of positions and subjecting some holders of futures contracts to substantial losses.

affected by any change in the non-US exchange rate between the time a particular order is placed and the time it is liquidated, offset or exercised.

There is a risk of loss by a Fund of the initial and variation margin deposits in the event of bankruptcy of the FCM with which the Fund has an open position in a futures contract. The assets of the Fund may not be fully protected in the event of the bankruptcy of the FCM or central counterparty because the Fund might be limited to recovering only a pro rata share of all available funds and margin segregated on behalf of an FCM's customers. If the FCM does not provide accurate reporting, a Fund is also subject to the risk that the FCM could use the Fund's assets, which are held in an omnibus account with assets belonging to the FCM's other customers, to satisfy its own financial obligations or the payment obligations of another customer to the central counterparty.

Options on futures contracts

A Fund may purchase and write options on futures contracts in which it is allowed to invest. For more information about the risks of entering into futures contracts, see "Futures" above.

When a Fund buys an option on a futures contract, it pays a premium for the right, but does not have the obligation, to purchase (call) or sell (put) the futures contract at a set price (called the exercise price). The purchase of a call or put option on a futures contract is similar in some respects to the purchase of a call or put option on an individual security or currency. Depending on the premium paid for the option compared to either the price of the futures contract upon which it is based or the price of the underlying reference instrument, the option may be less risky than direct ownership of the futures contract or the underlying reference instrument. For example, a Fund could purchase a call option on a long futures contract when seeking to hedge against an increase in the market value of the underlying reference instrument, such as appreciation in the value of a non-US currency against the US dollar.

When a Fund writes an option on a futures contract, the Fund becomes contractually obligated to take the opposite futures position if the buyer of the option exercises its rights to the futures position specified in the option. In return for the premium paid by the buyer, the seller assumes the risk of taking a possibly adverse futures position, which could result in substantial and potentially unlimited losses. The writing of a call option on a futures contract constitutes a partial hedge against the declining price of the security or foreign currency that is deliverable upon exercise of the futures contract. If the futures price at the expiration of the option is below the exercise price, the Funds will retain the full amount of the option premium, which provides a partial hedge against any decline that may have occurred in the value of a Fund's investment portfolio holdings. The writing of a put option on a futures contract constitutes a partial hedge against the increasing price of the security or foreign currency that is deliverable upon exercise of the futures contract. If the futures price at the expiration of the option is higher than the exercise price, the Funds will retain the full amount of the option premium, which provides a partial hedge against any increase in the price of securities that the Funds intend to purchase.

Options on a stock index futures contract give the holder the right to receive cash. Upon exercise of the option, the delivery of the futures position by the writer of the option to the holder of the option will be accompanied by delivery of the accumulated balance in the writer's futures margin account, which represents the amount by which the market price of the futures contract, at exercise, exceeds, in the case of a call, or is less than, in the case of a put, the exercise price of the futures contract. If an option is exercised on the last trading day prior to the expiration date of the option, the settlement will be made entirely in cash equal to the difference between the exercise price of the option and the closing price of the futures contract on the expiration date. If a put or call option that a Fund has written is exercised, the Fund may incur a loss, which will be reduced by the amount of the premium it received. Depending on the degree of correlation between changes in the value of its portfolio securities and changes in the value of its options positions, a Fund's losses from existing options on futures may, to some extent, be reduced or increased by changes in the value of portfolio securities. For example, a Fund will purchase a put option on an interest rate futures contract to hedge the Fund's investment portfolio against the risk of rising interest rates.

Furthermore, with respect to options on futures contracts, a Fund may seek to close out an option position by writing or buying an offsetting position covering the same securities or contracts and have the same exercise price and expiration date. The ability to establish and close out positions on options will be subject to the maintenance of a liquid secondary market, which cannot be assured.

Risks of potential regulation of swaps and other derivatives

The regulation of cleared and uncleared swaps, as well as other derivatives, is a rapidly changing area of law and is subject to modification by government and judicial action. In addition, the SEC, CFTC and the exchanges are authorized to take extraordinary actions in the event of a market emergency, including, for example, the implementation or reduction of speculative position limits, the implementation of higher margin requirements, the establishment of daily price limits and the suspension of trading.

It is not possible to predict fully the effects of current or future regulation. However, it is possible that developments in government regulation of various types of derivative instruments, such as speculative position limits on certain types of derivatives, or limits or restrictions on the counterparties with which the Fund engages in derivative transactions, may limit or prevent the Fund from using or limit a Fund's use of these instruments effectively as a part of its investment strategy, and could adversely affect the Fund's ability to achieve its investment objective. The Advisor will continue to monitor developments in the area, particularly to the extent regulatory changes affect the Fund's ability to enter into desired swap agreements. New requirements, even if not directly applicable to the Fund, may increase the cost of the Fund's investments and cost of doing business.

Special risks of certain derivatives

Certain derivative contracts entered into by a Fund may contain certain credit-risk related contingent features that could be triggered subject to certain circumstances. If triggered, the derivative counterparty could request additional cash margin and/or terminate the derivative contract.

Commodity pool operator exclusion

With respect to each Fund, the Advisor will claim an exclusion from the definition of CPO under the Commodity Exchange Act ("CEA") and the rules of the CFTC and, therefore, will not be subject to CFTC registration or regulation as a CPO. In addition, the Advisor will rely upon a related exclusion from the definition of "commodity trading advisor" ("CTA") under the CEA and the rules of the CFTC.

The terms of the CPO exclusion require each Fund, among other things, to adhere to certain limits on its investments in "commodity interests." Commodity interests include commodity futures, commodity options and swaps, which in turn include non-deliverable currency forwards, as further described in this SAI. Because the Advisor and the Funds intend to comply with the terms of the CPO exclusion, a Fund may, in the future, need to adjust its investment strategies, consistent with its investment objective, to limit its investments in these types of instruments. These Funds are not intended as a vehicle for trading in the commodity futures, commodity options or swaps markets. The CFTC has neither reviewed nor approved the Advisor's reliance on these exclusions, or the Funds, its investment strategies or this SAI.

Generally, the exclusion from CPO regulation on which the Advisor relies requires each Fund to meet one of the following tests for its commodity interest positions, other than positions entered into for bona fide hedging purposes (as defined in the rules of the CFTC): either (1) the aggregate initial margin and premiums required to establish the Fund's positions in commodity interests may not exceed 5% of the liquidation value of a Fund's portfolio (after taking into account unrealized profits and unrealized losses on any such positions); or (2) the aggregate net notional value of a Fund's commodity interest positions, determined at the time the most recent such position was established, may not exceed 100% of the liquidation value of the Fund's portfolio (after taking into account unrealized profits and unrealized losses on any such positions). In addition to meeting one of these trading limitations, the Funds may not be marketed as a commodity pool or otherwise as a vehicle for trading in the commodity futures,

commodity options or swaps markets. If, in the future, the Funds can no longer satisfy these requirements, the Advisor would withdraw its notice claiming an exclusion from the definition of a CPO, and the Advisor would be subject to registration and regulation as a CPO with respect to that Fund, in accordance with CFTC rules that apply to CPOs of registered investment companies. Generally, these rules allow for substituted compliance with CFTC disclosure and shareholder reporting requirements, based on the Advisor's compliance with comparable SEC requirements. However, as a result of CFTC regulation with respect to the Fund, the Fund may incur additional compliance and other expenses.

Illiquid securities

The term "illiquid securities" includes securities that cannot be disposed of within seven days in the ordinary course of business at approximately the amount at which the Fund has valued the securities and includes, among other securities, OTC options purchased, and repurchase agreements maturing in more than seven days other than those the Advisor has determined are liquid pursuant to guidelines established by the Board.

Effective December 1, 2018, the preceding paragraph is replaced with the following paragraph: The term "illiquid securities" includes any investment that a Fund reasonably expects cannot be sold or disposed of in current market conditions in seven calendar days or less without the sale or disposition significantly changing the market value of the investment, as classified by the Fund. In classifying securities as illiquid, a Fund will use information obtained after reasonable inquiry and take into account relevant market, trading, and investment-specific considerations. The Funds review liquidity classifications at least monthly, and more frequently if changes in relevant market, trading, and investment-specific considerations are reasonably expected to materially affect one or more of its investments' classifications.

The Fund may not be able to readily liquidate its investments in illiquid investments and may have to sell other investments if necessary to raise cash to meet its obligations. The lack of a liquid secondary market for illiquid investments may make it more difficult for the Fund to assign a value to those securities for purposes of valuing its portfolio and calculating its net asset value. The Advisor monitors the liquidity of investments in the Funds' portfolios and reports periodically on liquidity decisions to the Board. No Fund may acquire any illiquid investment if, immediately after the acquisition, the Fund would have invested more than 15% of its net assets in illiquid investments that are assets.

Rule 144A

The Funds may invest in securities that are exempt under Rule 144A from the registration requirements of the 1933 Act. Those securities purchased under Rule 144A are traded among qualified institutional buyers.

The Board has instructed the Advisor to consider the following factors in determining the liquidity of a security purchased under Rule 144A: (i) the security can be sold within seven days at approximately the same amount at which it is valued by the Fund; (ii) there is reasonable assurance that the security will remain marketable throughout the period it is expected to be held by the Fund, taking into account the actual frequency of trades and quotations for the security (expected frequency in the case of initial offerings); (iii) at least two dealers make a market in the security; (iv) there are at least three sources from which a price for the security is readily available; (v) settlement is made in a "regular way" for the type of security at issue; (vi) for Rule 144A securities that are also exempt from registration under Section 3(c)(7) of the Act, there is a sufficient market of "qualified purchasers" (as defined in the Act) to assure that it will remain marketable throughout the period it is expected to be held by the Fund; (vii) the issuer is a reporting company under the Securities Exchange Act of 1934, as amended (the "1934 Act") and (viii) the security is not in the same class as, or convertible into, any listed security of the issuer.

Effective December 1, 2018, the preceding paragraph is replaced with the following paragraph: A Fund will classify the liquidity of a security exempt under Rule 144A using information obtained after reasonable inquiry and taking into account relevant market, trading, and investment-specific considerations. The restricted nature of a Rule 144A security is one factor considered by a Fund in evaluating the liquidity of a Rule 144A security. The Funds review liquidity classifications of a Rule 144A security at least monthly, and more frequently if changes in relevant market, trading, and investment-specific considerations are reasonably expected to materially affect one or more of its investments' classifications.

Investing in securities under Rule 144A could have the effect of increasing the level of a Fund's illiquidity to the extent that qualified institutional buyers become, for a time, uninterested in purchasing these securities. After the purchase of a security under Rule 144A, however, the Trust and the Advisor will continue to monitor the liquidity of that security to ensure that a Fund has no more than 15% of its net assets in illiquid investments.

The Funds will limit investments in securities of issuers which the Funds are restricted from selling to the public without registration under the 1933 Act to no more than 15% of the Fund's net assets, excluding restricted securities eligible for resale pursuant to Rule 144A that have been determined to be liquid pursuant to a policy and procedures adopted by the Trust, on behalf of the Funds, which include continuing oversight by the Board.

If the Advisor determines that a security purchased in reliance on Rule 144A that was previously determined to be liquid, is no longer liquid and, as a result, a Fund's holdings of illiquid investments exceed the Fund's 15% limit on investment in such securities, the Advisor will determine what action shall be taken to ensure that the Fund continues to adhere to such a limitation, including disposing of illiquid assets which may include such Rule 144A securities.

Non-publicly traded securities, private placements and restricted securities

The Funds may invest in securities that are neither listed on a stock exchange nor traded OTC, including privately placed securities and limited partnerships. Investing in unregistered or unlisted securities, including investments in new and early stage companies, may involve a high degree of business and financial risk that can result in substantial losses. As a result of the absence of a public trading market for these securities, they may be less liquid than publicly traded securities. Although these securities may be resold in privately negotiated transactions, the prices realized from these sales could be less than those originally paid by a Fund, or less than what may be considered the fair value of such securities. Furthermore, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that would be applicable if their securities were publicly traded. If such securities are required to be registered under the securities laws of one or more jurisdictions before being resold, a Fund may be required to bear the expense of registration. Investments by the Funds in non-publicly traded securities, private placements and restricted securities will be limited by each Fund's prohibition on investing more than 15% of its net assets in illiquid investments.

Regulation S securities

The Funds may invest in the securities of US and non-US issuers that are issued through private offerings without registration with the SEC pursuant to Regulation S ("Regulation S Securities") under the 1933 Act. Offerings of Regulation S Securities may be conducted outside of the United States. Because Regulation S Securities are subject to legal or contractual restrictions on resale, Regulation S Securities may be considered illiquid. If a Regulation S Security is determined to be illiquid, the investment will be included with a Fund's 15% of net assets limitation on investment in illiquid investments. Furthermore, because Regulation S Securities are generally less liquid than registered securities, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Although Regulation S Securities may be resold in privately negotiated transactions, the price realized from these sales could be less than those originally paid by a Fund. Further, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that would be applicable if their securities were publicly traded. Accordingly, Regulation S Securities may involve a high degree of business and financial risk and may result in substantial losses.

Investment company securities and investments in affiliated investment companies

Subject to the provisions of any rules and regulations under the Act or exemptive orders issued thereunder, securities of other investment companies may be acquired by each Fund to the extent that such purchases are consistent with that Fund's investment objective and restrictions and are permitted under the Act. The Act requires that, as determined immediately after a purchase is made, (i) not more than 5% of the value of a Fund's total assets will be invested in the securities of any one investment company, (ii) not more than 10% of the value of the Fund's total assets will be invested in securities of investment companies as a group and (iii) not more than 3% of the outstanding voting stock of any one investment company will be owned by the Fund. Certain exceptions to these limitations may apply. As a shareholder of another investment company, a Fund would bear, along with other shareholders, its pro rata portion of the other investment company's expenses, including advisory fees. These expenses would be in addition to the expenses that such a Fund would bear in connection with its own operations.

The Funds may invest in securities issued by other registered investment companies advised by the Advisor, including portfolios of the UBS Relationship Funds, beyond the above percentage maximums pursuant to rules promulgated by the SEC and/or exemptive relief granted by the SEC to the extent that the Advisor determines that such investments are a more efficient means for a Fund to gain exposure to certain asset classes than by the Fund investing directly in individual securities. A Fund may only invest in portfolios of UBS Relationship Funds or other affiliated investment companies to the extent that the asset class exposure in such portfolios is consistent with the permissible asset class exposure for the Fund, had the Fund invested directly in securities, and the portfolios of such investment companies are subject to similar risks and limitations as the Fund.

Foreign securities

Investors should recognize that investing in foreign issuers involves certain considerations, including those set forth in the Funds' Prospectus, which are not typically associated with investing in US issuers. Because the stocks of foreign companies are frequently denominated in foreign currencies, and because the Fund may temporarily hold uninvested reserves in bank deposits in foreign currencies, the Fund will be affected favorably or unfavorably by changes in currency rates and in exchange control regulations and may incur costs in connection with conversions between various currencies. The investment policies of the UBS Engage For Impact Fund permits it to enter into forward foreign currency exchange contracts, futures and options and interest rate swaps in order to hedge portfolio holdings and commitments against changes in the level of future currency rates.

Investment in the securities of foreign governmental entities involves risk. The governmental entity that controls the repayment of sovereign debt may not be able or willing to repay the principal and/or interest when due in accordance with the terms of such debt. A governmental entity's willingness or ability to repay principal and interest due in a timely manner may be affected by, among other factors, its cash flow situation, the extent of its foreign reserves, the availability of sufficient foreign exchange on the date a payment is due, the relative size of the debt service burden to the economy as a whole, the governmental entity's policy toward the International Monetary Fund ("IMF"), and the political constraints to which a governmental entity may be subject. Governmental entities may also be dependent on expected disbursements from foreign governments, multilateral agencies and others abroad to reduce principal and interest arrearages on their debt. The commitment on the part of these governments, agencies and others to make such disbursements may be conditioned on a governmental entity's implementation of economic reforms and/or economic performance and the timely service of such debtor's obligations. Failure to implement such reforms, achieve such levels of economic performance or repay principal or interest when due may result in the cancellation of such third parties commitments to lend funds to the governmental entity, which may further impair such debtor's ability or willingness to service its debts in a timely manner. Consequently, governmental entities may default on their sovereign debt. Holders of sovereign debt may be requested to participate in the rescheduling of such debt and to extend further loans to governmental entities. There is no bankruptcy proceeding by which sovereign debt on which governmental entities have defaulted may be collected in whole or in part.

Emerging markets investments

The UBS Engage For Impact Fund may invest in equity securities of emerging market issuers, or securities with respect to which the return is derived from the equity securities of issuers in emerging markets. The UBS Sustainable Development Bank Bond Fund may invest in debt securities of corporate issuers in developing countries and fixed income securities of emerging market issuers, including government and government-related entities (including participation in loans between governments and financial institutions), and of entities organized to restructure outstanding debt of such issuers.

A Fund's investments in emerging market government and government-related securities may consist of: (i) debt securities or obligations issued or guaranteed by governments, governmental agencies or instrumentalities and political subdivisions located in emerging market countries (including participation in loans between governments and financial institutions), (ii) debt securities or obligations issued by government owned, controlled or sponsored entities located in emerging market countries and (iii) interests in issuers by any of the entities described above.

UBS Sustainable Development Bank Bond Fund's investments in the fixed income securities of emerging market issuers may include investments in Structured Securities, Brady Bonds (as such capitalized terms are defined below) and certain non-publicly traded securities.

The Fund may invest a portion of its assets in structured foreign investments. This term generally refers to interests in US and foreign entities organized and operated solely for the purpose of securitizing or restructuring the investment characteristics of foreign securities. This type of securitization or restructuring usually involves the deposit with or purchase by a US or foreign entity, such as a corporation or trust, of specified instruments (such as commercial bank loans or Brady Bonds) and the issuance by that entity of one or more classes of securities backed by, or representing interests in, the underlying instruments. The cash flow on the underlying instruments may be apportioned among the newly issued structured foreign investments to create securities with different investment characteristics such as varying maturities, payment priorities and interest rate provisions, and the extent of the payments made with respect to structured foreign investments is often dependent on the extent of the cash flow on the underlying instruments.

Structured foreign investments frequently involve no credit enhancement. Accordingly, their credit risk generally will be equivalent to that of the underlying instruments. In addition, classes of structured foreign investments may be subordinated to the right of payment of another class. Subordinated structured foreign investments typically have higher yields and present greater risks than unsubordinated structured foreign investments.

The UBS Sustainable Development Bank Bond Fund may invest in fixed rate and floating rate loans ("Loans") arranged through private negotiations between an issuer of sovereign debt obligations and one or more financial institutions ("Lenders"). The Fund's investments in Loans are expected in most instances to be in the form of a participation in loans ("Participation") and assignments of all or a portion of Loans ("Assignments") from third parties. The Fund will have the right to receive payments of principal, interest and any fees to which they are entitled only from the Lender selling the Participation and only upon receipt by the Lender of the payments from the borrower. In the event of the insolvency of the Lender selling a Participation, the Fund may be treated as a general creditor of the Lender and may not benefit from any set-off between the Lender and the borrower. Certain Participations may be structured in a manner designed to avoid subjecting purchasers of Participations to the credit risk of the Lender with respect to the Participations. Even under such a structure, in the event of the Lender's insolvency, the Lender's servicing of the Participation may be delayed and the assignability of the Participation may be impaired. The Fund will acquire the Participations only if the Lender interpositioned between the Fund and a borrower is determined by the Advisor to be creditworthy.

When the UBS Sustainable Development Bank Bond Fund purchases Assignments from Lenders, it will acquire direct rights against the borrower on the Loan. However, because Assignments are arranged through private negotiations

between potential assignees and potential assignors, the rights and obligations acquired by the Fund as the purchaser of an Assignment may differ from, and be more limited than, those held by the assigning Lender.

The UBS Sustainable Development Bank Bond Fund may invest in Brady Bonds, which are securities created through the exchange of existing commercial bank loans to public and private entities in certain emerging markets for new bonds in connection with debt restructurings under a debt restructuring plan introduced by former US Secretary of the Treasury, Nicholas F. Brady (the "Brady Plan"). Brady Plan debt restructurings have been implemented to date in Argentina, Bulgaria, Brazil, Costa Rica, the Dominican Republic, Ecuador, Ivory Coast, Jordan, Mexico, Morocco, Nicaragua, Nigeria, Panama, Peru, the Philippines, Poland, Russia, Uruguay, Venezuela and Vietnam. Brady Bonds may be collateralized or uncollateralized, are issued in various currencies (but primarily the US dollar), and are actively traded in OTC secondary markets. Dollar-denominated, collateralized Brady Bonds, which may be fixed-rate bonds or floating-rate bonds, are generally collateralized in full as to principal by US Treasury zero coupon bonds having the same maturity as the bonds.

Brady Bonds are often viewed as having three or four valuation components: the collateralized repayment of principal at final maturity; the collateralized interest payments; the uncollateralized interest payments; and any uncollateralized repayment of principal at maturity (these uncollateralized amounts constitute the "residual risk"). In light of the residual risk of Brady Bonds and the history of defaults of countries issuing Brady Bonds with respect to commercial bank loans by public and private entities, investments in Brady Bonds may be viewed as speculative. There can be no assurance that the Brady Bonds in which the Fund invests will not be subject to restructuring arrangements or to requests for a new credit which may cause the Fund to suffer a loss of interest or principal in any of its holdings.

The Funds also may invest in securities that neither are listed on a stock exchange nor traded OTC, including privately placed securities and limited partnerships. Investing in such unlisted emerging market equity securities, including investments in new and early stage companies, may involve a high degree of business and financial risk that can result in substantial losses. As a result of the absence of a public trading market for these securities, they may be less liquid than publicly traded securities.

Risks of investing in emerging markets

There are additional risks inherent in investing in less developed countries that are applicable to the Funds. An emerging market country is a country defined as an emerging or developing economy by any of the World Bank, the International Finance Corporation or the United Nations or its authorities. Additionally, the Funds, for purposes of their investments, may consider a country included in JP Morgan or MSCI emerging markets indices to be an emerging market country. The countries included in this definition will change over time. An emerging market security is a security issued by a government or other issuer that, in the opinion of the Advisor, has one or more of the following characteristics: (i) the security's principal trading market is an emerging market; (ii) at least 50% of the issuer's (or the issuer's parent company's) revenue is generated from goods produced or sold, investments made, or services performed in emerging market countries; (iii) at least 50% of the issuer's (or the issuer's parent company's) physical assets are located in emerging market countries; (iv) at least 50% of the issuer's (or the issuer's parent company's) economic activities are in emerging market countries; or (v) the principal place of business of the issuer (or the issuer's parent company) is an emerging market country. In addition, an emerging market security includes derivative instruments on emerging market securities or indices.

Funds may invest have historically experienced, and may continue to experience, high rates of inflation, high interest rates, exchange rate fluctuations or currency depreciation, large amounts of external debt, balance of payments and trade difficulties and extreme poverty and unemployment. Additional factors that may influence the ability or willingness to service debt include, but are not limited to: a country's cash flow situation; the availability of sufficient foreign exchange on the date a payment is due; the relative size of its debt service burden to the economy as a whole; its government's policy towards the IMF, the World Bank and other international agencies; and the political constraints to which a government debtor may be subject.

The ability of a foreign government or government-related issuer to make timely and ultimate payments on its external debt obligations will be strongly influenced by the issuer's balance of payments, including export performance, its access to international credits and investments, fluctuations in interest rates and the extent of its foreign reserves. A country whose exports are concentrated in a few commodities or whose economy depends on certain strategic imports could be vulnerable to fluctuations in international prices of these commodities or imports. To the extent that a country receives payment for its exports in currencies other than dollars, its ability to make debt payments denominated in dollars could be adversely affected. If a foreign government or government-related issuer cannot generate sufficient earnings from foreign trade to service its external debt, it may need to depend on continuing loans and aid from foreign governments, commercial banks and multilateral organizations, and inflows of foreign investment. The commitment on the part of these foreign governments, multilateral organizations and others to make such disbursements may be conditioned on the government's implementation of economic reforms and/or economic performance and the timely service of its obligations. Failure to implement such reforms, achieve such levels of economic performance or repay principal or interest when due may curtail the willingness of such third parties to lend funds, which may further impair the issuer's ability or willingness to service its debts in a timely manner. The cost of servicing external debt will also generally be adversely affected by rising international interest rates because many external debt obligations bear interest at rates that are adjusted based upon international interest rates. The ability to service external debt will also depend on the level of the relevant government's international currency reserves and its access to foreign exchange. Currency devaluations may affect the ability of a governmental issuer to obtain sufficient foreign exchange to service its external debt.

As a result of the foregoing, a governmental issuer may default on its obligations. If such a default occurs, the Funds may have limited effective legal recourse against the issuer and/or guarantor. Remedies must, in some cases, be pursued in the courts of the defaulting country itself, and the ability of the holder of foreign government and government-related debt securities to obtain recourse may be subject to the political climate in the relevant country. In addition, no assurance can be given that the holders of commercial bank debt will not contest payments to the holders of other foreign government and government-related debt obligations in the event of default under their commercial bank loan agreements.

The issuers of the government and government-related debt securities in which UBS Sustainable Development Bank Bond Fund expects to invest have in the past experienced substantial difficulties in servicing their external debt obligations, which has led to defaults on certain obligations and the restructuring of certain indebtedness. Restructuring arrangements have included, among other things, reducing and rescheduling interest and principal payments by negotiating new or amended credit agreements or converting outstanding principal and unpaid interest to Brady Bonds, and obtaining new credit to finance interest payments. Holders of certain foreign government and government-related debt securities may be requested to participate in the restructuring of such obligations and to extend further loans to their issuers. There can be no assurance that the Brady Bonds and other foreign government and government-related debt securities in which the Fund may invest will not be subject to similar defaults or restructuring arrangements which may adversely affect the value of such investments. Furthermore, certain participants in the secondary market for such debt may be directly involved in negotiating the terms of these arrangements and may therefore have access to information not available to other market participants.

Payments to holders of the high yield, high risk, foreign debt securities in which UBS Sustainable Development Bank Bond Fund may invest may be subject to foreign withholding and other taxes. Although the holders of foreign government and government-related debt securities may be entitled to tax gross-up payments from the issuers of such instruments, there is no assurance that such payments will be made.

Issuer location

The Advisor considers a number of factors to determine whether an investment is tied to a particular country, including whether the investment is issued or guaranteed by a particular government or any of its agencies, political subdivisions or instrumentalities; the investment has its primary trading market in a particular country; the issuer is organized under the laws of, derives at least 50% of its revenues from, or has at least 50% of its assets in a particular country; the investment is included in an index representative of a particular country or region; and the investment is exposed to the economic fortunes and risks of a particular country.

Short sales

The Funds may, from time to time, sell securities short. In a short sale, a Fund sells a security it does not own in anticipation of a decline in the market value of that security. To complete the transaction, the Fund must borrow the security to make delivery to the buyer. The Fund is then obligated to replace the security borrowed by purchasing it at the market price at the time of replacement. Until the security is replaced, the Fund must pay the lender any dividends or interest that accrues during the period of the loan. To borrow the security, a Fund may also be required to pay a premium, which would increase the cost of the security sold. The proceeds of the short sale (which may be invested in equity securities) will be retained by the broker, to the extent necessary to meet margin requirements, until the short position is closed out.

A Fund will incur a loss as a result of the short sale if the price of the security increases between the date of the short sale and the date on which the Fund replaces the borrowed security, and a Fund will realize a gain if the security declines in price between those same dates. The amount of any gain will be decreased, and the amount of any loss increased, by the amount of any premium, dividends or interest the Fund is required to pay in connection with the short sale. Because a Fund's loss on a short sale arises from increases in the value of the security sold short, such loss, like the potential increase in price of the security sold short, is theoretically unlimited. In addition, a Fund's securities held long could decline in value at the same time the value of the security sold short increases, thereby increasing the Fund's potential for loss.

Until a Fund replaces a borrowed security, the Fund will designate Segregated Assets in an amount equal to its obligation to purchase the stocks sold short, as required by law. The amount segregated in this manner will be increased or decreased each business day to equal the change in market value of the Fund's obligation to purchase the security sold short. If the lending broker requires a Fund to deposit additional collateral (in addition to the short sales proceeds that the broker holds during the period of the short sale), the amount of the additional collateral may be deducted in determining the amount of cash or liquid assets the Fund is required to segregate to cover the short sale obligation. The amount segregated must be unencumbered by any other obligation or claim than the obligation that is being covered. The Advisor and the Funds believe that short sale obligations that are covered, either by an offsetting asset or right (acquiring the stock sold short or having an option to purchase the stock sold short at an exercise price that covers the obligation), or by a Fund's Segregated Assets procedures (or a combination thereof), are not senior securities under the Act and are not subject to a Fund's borrowing restrictions. A Fund is also required to repay the lender of the stock any dividends or interest that accrues on the stock during the period of the loan.

Investments relating to UBS Engage For Impact Fund

Equity securities

The Fund may invest in a broad range of equity securities of US and non-US issuers, including, but not limited to, common stocks of companies or closed-end investment companies, preferred stocks, debt securities convertible into or exchangeable for common stock, securities such as warrants or rights that are convertible into common stock and sponsored or unsponsored American, European and Global depositary receipts ("Depositary Receipts"). The issuers of unsponsored Depositary Receipts are not obligated to disclose material information in the United States. The Fund expects its US equity investments and its non-US component to include available shares of large, intermediate and small capitalization companies. Capitalization levels are measured relative to specific markets, thus large, intermediate and small capitalization ranges vary country by country. The Fund may invest in equity securities of issuers in emerging markets and in securities with respect to which the return is derived from the equity securities of issuers in emerging markets.

Swaps

The Fund may engage in swaps, including, but not limited to, interest rate and total return swaps, and the purchase or sale of related caps, floors, collars and other derivative instruments. The Fund expects to enter into these transactions to preserve a return or spread on a particular investment or portion of the portfolio's duration, to protect against any increase in the price of securities the Fund anticipates purchasing at a later date, or to gain exposure to certain markets or returns. When the Fund enters into a swap transaction, there is a risk that the Fund may experience a loss that is greater than the amount it originally invested.

Generally, swap agreements are contracts between the Fund and another party (the swap counterparty) involving the exchange of payments on specified terms over periods ranging from a few days to multiple years. In a basic swap transaction, the Fund agrees with the swap counterparty to exchange the returns (or differentials in rates of return) and/or cash flows earned or realized on a particular "notional amount" or value of predetermined underlying reference assets. The notional amount is the set dollar or other value selected by the parties to use as the basis on which to calculate the obligations that the parties to a swap agreement have agreed to exchange. The parties typically do not actually exchange the notional amount. Instead they agree to exchange the returns that would be earned or realized if the notional amount were invested in given investments or at given interest rates. Examples of returns that may be exchanged in a swap agreement are those of a particular security, a particular fixed or variable interest rate, a particular non-US currency, or a "basket" of securities representing a particular index. Swaps can also be based on credit and other events.

A swap agreement may be negotiated bilaterally and traded over-the-counter ("OTC") between the two parties (for an uncleared swap) or, in some instances, must be transacted through a futures commission merchant ("FCM") and cleared through a clearinghouse that serves as a central counterparty (for a cleared swap). As a result of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and related regulatory developments, which have imposed comprehensive new regulatory requirements on swaps and swap market participants, certain categories of swaps, such as most types of standardized interest rate and credit default swap index agreements, are now subject to mandatory central clearing, and some of these cleared swaps must be traded on an exchange or swap execution facility. It is expected that additional categories of swaps will in the future be designated as subject to mandatory clearing and exchange trading. Mandatory clearing and exchange-trading of additional swaps will occur on a phased-in basis based on the type of market participant, US Commodity Futures Trading Commission ("CFTC") approval of contracts for central clearing and public trading facilities making such cleared swaps available to trade. Some categories of swaps may also be cleared and traded on exchanges on a voluntary basis. While the intent of these regulatory reforms requiring clearing and exchange trading for swaps is to mitigate counterparty risk and increase liquidity and transparency in the swaps markets, mandatory clearing and exchange trading may increase trading costs and impose other risks.

The use of swaps involves investment techniques and risks different from those associated with ordinary portfolio security transactions. If the Advisor is incorrect in its forecast of market values, total return of securities, interest rates and other applicable factors, the investment performance of the Fund will be less favorable than it would have been if this investment technique was never used.

In an uncleared swap, the swap counterparty is typically a brokerage firm, bank or other financial institution. During the term of an uncleared swap, the Fund will be required to pledge to the swap counterparty, from time to time, an amount of cash and/or other assets equal to the net amount (if any) that would be payable by the Fund to the counterparty if all outstanding swaps between the parties were terminated on the date in question, including any early termination payments (variation margin). Periodically, changes in the amount pledged are made to recognize changes in value of the contract resulting from, among other things, interest on the notional value of the contract, market value changes in the underlying investment, and/or dividends paid by the issuer of the underlying asset. Likewise, the counterparty will be required to pledge cash or other assets to cover its obligations to the Fund. However, the amount pledged may not always be equal to or more than the amount due to the other party. Therefore, if a counterparty defaults on its obligations to the Fund, the amount pledged by the counterparty and available to the Fund may not be sufficient to cover all the amounts due to the Fund, and the Fund may sustain a loss.

Currently, the Fund does not typically provide initial margin in connection with uncleared swaps. However, rules requiring initial and variation margin to be posted by certain market participants for uncleared swaps have been adopted and are being phased in over time. When these rules take effect with respect to the Fund, if the Fund is deemed to have material swaps exposure under the applicable swaps regulation, it will be required to post both initial margin in addition to variation margin.

In a cleared swap, the Fund's ultimate counterparty is a central clearinghouse rather than a brokerage firm, bank or other financial institution. Cleared swaps are submitted for clearing through each party's FCM, which must be a member of the clearinghouse that serves as the central counterparty. When the Fund enters into a cleared swap, the Fund must make an initial margin deposit with the FCM, which is typically calculated as an amount equal to the volatility in market value of the cleared swap over a fixed period. If the value of the Fund's cleared swap declines, the Fund will be required to make additional "variation margin" payments to the FCM to settle the change in value. Conversely, if the market value of the Fund's position increases, the FCM will return "variation margin" to the Fund.

Central clearing is designed to reduce counterparty credit risk and increase liquidity compared to uncleared swaps because central clearing interposes the central clearinghouse as the counterparty to each participant's swap, but it does not eliminate those risks completely and may involve additional costs and risks not associated with uncleared swaps. There is also a risk of loss by the Fund of the initial and variation margin deposits in the event of bankruptcy of the FCM with which the Fund has an open position, or of the central counterparty in a swap contract. If the FCM does not provide accurate reporting, the Fund is also subject to the risk that the FCM could use the Fund's assets, which are held in an omnibus account with assets belonging to the FCM's other customers, to satisfy its own financial obligations or the payment obligations of another customer to the central counterparty. Credit risk of cleared swap participants is concentrated in a few clearinghouses and the consequences of insolvency of a clearinghouse are not clear.

With cleared swaps, the Fund may not be able to obtain terms as favorable as it would be able to negotiate for an uncleared swap. In addition, an FCM may unilaterally amend the terms of its agreement with the Fund, which may include the imposition of position limits or additional margin requirements with respect to the Fund's investment in certain types of swaps. Central counterparties and FCMs can require termination of existing cleared swap transactions upon the occurrence of certain events, and can also require increases in margin above the margin that is required at the initiation of the swap agreement.

The Fund is also subject to the risk that, after entering into a cleared swap with an executing broker, no FCM or central counterparty is willing or able to clear the transaction. In such an event, the Fund may be required to break the trade and make an early termination payment to the executing broker.

Some types of swaps that are subject to mandatory clearing are also required to be traded on swap execution facilities ("SEFs"). A SEF is a trading platform where multiple market participants can execute swap transactions by accepting bids and offers made by multiple other participants on the platform. Transactions executed on a SEF may increase market transparency and liquidity but may require a Fund to incur increased expenses to access the same types of swaps that it has used in the past.

If a swap transaction is particularly large or if the relevant market is illiquid, the Fund may not be able to establish or liquidate a position at an advantageous time or price, which may result in significant losses. Participants in the swap markets are not required to make continuous markets in the swap contracts they trade. Participants could refuse to quote prices for swap contracts or quote prices with an unusually wide spread between the price at which they are prepared to buy and the price at which they are prepared to sell. Some swap agreements entail complex terms and may require a greater degree of subjectivity in their valuation. However, the swap markets have grown substantially in recent years, with a large number of financial institutions acting both as principals and agents, utilizing standardized swap documentation. As a result, the swap markets have become increasingly liquid. In addition, central clearing and the trading of cleared swaps on public facilities are intended to increase liquidity.

Interest rate swaps involve the exchange by the Fund with another party of their respective commitments to receive or pay interest (e.g., an exchange of fixed rate payments for floating rate payments) with respect to a notional amount of principal. Currency swaps involve the exchange of cash flows on a notional amount based on changes in the values of referenced currencies.

The purchase of a cap entitles the purchaser, in return for a premium paid to the seller, to receive payments on a notional principal amount from the seller of the cap to the extent that a specified index exceeds a predetermined interest rate or amount. The purchase of an interest rate floor entitles the purchaser of the floor to receive payments, in return for a premium paid to the seller, on a notional principal amount from the seller of the floor to the extent that a specified index falls below a predetermined interest rate or amount. A collar is a combination of a cap and a floor that preserves a certain return within a predetermined range of interest rates or values.

Total return swap contracts are agreements between two parties where one counterparty pays the other the total return of a particular instrument (e.g., a specified security, basket of securities or securities indices, including real estate market indices) during the specified period in return for periodic payments based on a fixed or variable interest rate, typically at a floating rate based on the London Interbank Offered Rate ("LIBOR"), or the total rate of return on another financial instrument. The "total return" includes interest or dividend payments from, along with any change in value of, the referenced asset over a specified period. In a typical total return equity swap, payments made by the Fund or the counterparty are based on the total return of a particular reference asset or assets (such as an equity security, a combination of such securities, or an index). That is, one party agrees to pay another party the return on a stock, basket of stocks, or stock index in return for a specified interest rate. The Fund will enter into total return swap contracts only on a net basis, i.e., the two parties' obligations are netted out, with the Fund paying or receiving, as the case may be, only the net amount of the payments. Total return swap contracts may be used to obtain exposure to a security or market without owning or taking physical custody of such security or investing directly in such market. The value of the swap position as well as the payments required to be made by a Fund or a counterparty will increase or decrease depending on the changes in value of the underlying asset. Total return swap contracts may effectively add leverage to the Fund's portfolio because, in addition to its total net assets, the Fund would be subject to investment exposure on the notional amount of the swap.

Total return swap transactions involve greater risks than if a Fund had invested in the underlying asset directly. Total return swap transactions involve counterparty risks, as discussed above, but also involve additional risks, including interest rate risk and market risk. The total rate of return of an investment on which a total return swap contract is based may exhibit substantial volatility and, in any given period, may be positive or negative for the specified period of the total return swap contract. If the Advisor is incorrect in its forecast of the underlying asset's total return, the investment performance of the Fund will be less favorable than it would have been if this investment technique was never used. In the event the total rate of return of the underlying asset is negative for the specified period of the swap contract, the Fund will be required to make a payment to the counterparty in addition to the periodic payment required by the swap contract to cover the decline in value of the underlying asset. A Fund's risk of loss, therefore, is increased because the Fund could lose an amount equal to the decrease in value of the underlying asset for the specified period of time, in addition to the periodic payments required by the total return swap contract.

The Fund may also purchase swaptions. An option on a swap agreement, also called a "swaption," is an option that gives the buyer the right, but not the obligation, to enter into a swap on a future date in exchange for paying a market-based "premium." A receiver swaption gives the owner the right to enter into a swap pursuant to which the owner will receive payments based on a fixed rate in exchange for making payments based on the total return of a specified asset, reference rate, or index. A payer swaption gives the owner the right to make payments based on a fixed rate and, in exchange, receive payments based on the total return of a specified asset, reference rate, or index. Swaptions also include options that allow an existing swap to be terminated or extended by one of the counterparties.

Forward foreign currency contracts

The Fund may purchase or sell currencies and/or engage in forward foreign currency transactions in order to expedite settlement of portfolio transactions, manage currency risk or to gain exposure to a currency without purchasing securities denominated in that currency.

Forward foreign currency contracts are traded in the inter-bank market conducted directly between currency traders (usually large commercial banks) and their customers. A forward contract generally has no deposit requirement and no commissions are charged at any stage for trades. The Fund will account for forward contracts by marking-to-market each day at current forward contract values.

The Fund will enter into forward contracts to sell, for a fixed amount of US dollars or other appropriate currency, an amount of foreign currency, to the extent that the value of the short forward contract is covered by the underlying value of securities denominated in the currency being sold. Alternatively, when the Fund enters into a non-cash settled forward contract, or enters into a cash settled forward contract for a foreign currency for which it does not own securities denominated in that currency, to sell an amount of foreign currency, the Fund's custodian or subcustodian will maintain Segregated Assets in an amount equal to the contract's full notional exposure of the Fund's delivery obligation under the contract. However, where a forward is executed pursuant to an agreement that provides that the different currency deliverable amounts may be converted into a single currency to determine the net realized gain or loss for settlement purposes, the cover amount is equal to the daily mark-to-market (net) obligation of the Fund (the unrealized loss, if any), as opposed to the full notional exposure of the Fund's delivery obligation. Further, where the Fund has offsetting long and short positions in identical currencies, the notional amounts of the currency positions may be netted against each other, and the cover amount is the net notional amount owed. The cover amount may be further reduced if the netting arrangement described above applies to both currency transactions, whereby the cover amount would equal the aggregate net unrealized loss of the Fund. Settlement processes for deliverable forward currency contracts may further reduce the Fund's delivery obligation and therefore the cover amount. Where a settlement arrangement (such as a Currency Linked Settlement) provides that on the expiration date the gross notional delivery amount across all transactions will be aggregated, the cover amount is equal to the Fund's net notional amount owed.

Non-deliverable forwards

The Fund may, from time to time, engage in non-deliverable forward transactions to manage currency risk or to gain exposure to a currency without purchasing securities denominated in that currency. A non-deliverable forward is a transaction that represents an agreement between the Fund and a counterparty (usually a commercial bank) to buy or sell a specified (notional) amount of a particular currency at an agreed upon foreign exchange rate on an agreed upon future date. Unlike other currency transactions, there is no physical delivery of the currency on the settlement of a non-deliverable forward transaction. Rather, the Fund and the counterparty agree to net the settlement by making a payment in US dollars or another fully convertible currency that represents any differential between the foreign exchange rate agreed upon at the inception of the non-deliverable forward agreement and the actual exchange rate on the agreed upon future date. Thus, the actual gain or loss of a given non-deliverable forward transaction is calculated by multiplying the transaction's notional amount by the difference between the agreed upon forward exchange rate and the actual exchange rate when the transaction is completed.

When the Fund enters into a non-deliverable forward transaction, the Fund's custodian will maintain Segregated Assets in an amount equal to the daily mark-to-market (net) obligation of the Fund. If the additional Segregated Assets decline in value or the amount of the Fund's commitment increases because of changes in currency rates, additional cash or securities will be designated as Segregated Assets on a daily basis so that the value of the account will be equal to the daily mark-to-market (net) obligation of the Fund under the non-deliverable forward agreement.

Because the Fund generally may only close out a non-deliverable forward with the particular counterparty, there is a risk that the counterparty will default on its obligation under the agreement. If the counterparty defaults, the Fund will have contractual remedies pursuant to the agreement related to the transaction, but there is no assurance that contract counterparties will be able to meet their obligations pursuant to such agreements or that, in the event of a default, the Fund will succeed in pursuing contractual remedies. The Fund thus assumes the risk that it may be delayed or prevented from obtaining payments owed to it pursuant to non-deliverable forward transactions.

In addition, where the currency exchange rates that are the subject of a given non-deliverable forward transaction do not move in the direction or to the extent anticipated, the Fund could sustain losses on the non-deliverable forward transaction. The Fund's investment in a particular non-deliverable forward transaction will be affected favorably or unfavorably by factors that affect the subject currencies, including economic, political and legal developments that impact the applicable countries, as well as exchange control regulations of the applicable countries. These risks are heightened when a non-deliverable forward transaction involves currencies of emerging market countries because such currencies can be volatile and there is a greater risk that such currencies will be devalued against the US dollar or other currencies.

Under definitions adopted by the CFTC and SEC, non-deliverable forwards (including some deliverable forwards that are cash-settled) are considered swaps, and therefore are included in the definition of "commodity interests." Although non-deliverable forwards have historically been traded in the OTC market, as swaps they may in the future be required to be centrally cleared and traded on public facilities. For more information on central clearing and trading of cleared swaps, see "Swaps" and "Risks of potential regulation of swaps and other derivatives." Currency and cross currency forwards that qualify as deliverable forwards are not regulated as swaps for most purposes, and are not included in the definition of "commodity interests." However these forwards are subject to some requirements applicable to swaps, including reporting to swap data repositories, documentation requirements, and business conduct rules applicable to swap dealers. CFTC regulation of currency and cross currency forwards, especially non-deliverable forwards, may restrict the Fund's ability to use these instruments in the manner described above or subject the Advisor to CFTC registration and regulation as a commodity pool operator ("CPO").

Options

The Fund may purchase and write call or put options on foreign or US securities and indices and enter into related closing transactions. The Fund may also purchase call options on particular market segment indices to achieve temporary exposure to a specific industry.

The Fund may invest in options that are either listed on US or recognized foreign exchanges or traded OTC. Certain OTC options may be illiquid. Thus, it may not be possible to close options positions, and this may have an adverse impact on the Fund's ability to effectively hedge its securities. The Trust has been notified by the SEC that it considers OTC options to be illiquid. Accordingly, the Fund will only invest in such options to the extent consistent with its 15% limit on investments in illiquid investments.

Purchasing call options—The Fund may purchase call options on securities to the extent that premiums on all outstanding call options paid by the Fund do not aggregate to more than 20% of the Fund's total assets. When the Fund purchases a call option, in return for a premium paid by the Fund to the writer of the option, the Fund obtains the right to buy the security underlying the option at a specified exercise price at any time during the term of the option. The writer of the call option, who receives the premium upon writing the option, has the obligation upon exercise of the option, to deliver the underlying security against payment of the exercise price.

The Fund may, following the purchase of a call option, liquidate its position by effecting a closing sale transaction. This is accomplished by selling an option of the same series as the option previously purchased. The Fund will realize a profit from a closing sale transaction if the price received on the transaction is more than the premium paid to purchase the original call option; the Fund will realize a loss from a closing sale transaction if the price received on the transaction is less than the premium paid to purchase the original call option.

Although the Fund will generally purchase only those call options for which there appears to be an active secondary market, there is no assurance that a liquid secondary market on an exchange will exist for any particular option, or at any particular time, and for some options no secondary market on an exchange may exist. In such an event, it may not be possible to effect closing transactions in particular options, with the result that the Fund would have to exercise its options in order to realize any profit and would incur brokerage commissions upon the exercise of such options and upon the subsequent disposition of the underlying securities acquired through the exercise of such options. Further, unless the price of the underlying security changes sufficiently, a call option purchased by the Fund may expire without any value to the Fund, in which event the Fund would realize a capital loss, which will be short-term unless the option was held for more than one year.

Call writing—The Fund may write call options from time to time on such portions of its portfolio, without limit, as the Advisor determines is appropriate in seeking to achieve the Fund's investment objective. If the security over which a call has been sold rises in value beyond the strike price of the sold option, then the Fund may not fully participate in the price appreciation.

During the option period for a call option, the writer may be assigned an exercise notice by the broker-dealer through whom such call option was sold, requiring the writer to deliver the underlying security against payment of the exercise price. This obligation is terminated upon the expiration of the option or upon entering a closing purchase transaction. A closing purchase transaction, in which the Fund, as writer of an option, terminates its obligation by purchasing an option of the same series as the option previously written, cannot be effected once the option writer has received an exercise notice for such option.

Closing purchase transactions will ordinarily be effected to realize a profit on an outstanding call option, to prevent an underlying security from being called, to permit the sale of the underlying security or to enable the Fund to write another call option on the underlying security with either a different exercise price, expiration date or both. The Fund may realize a net gain or loss from a closing purchase transaction depending upon whether the net amount of the original premium received on the call option is more or less than the cost of effecting the closing purchase

transaction. Any loss incurred in a closing purchase transaction may be partially or entirely offset by the premium received from a sale of a different call option on the same underlying security. Such a loss may also be wholly or partially offset by unrealized appreciation in the market value of the underlying security. Conversely, a gain resulting from a closing purchase transaction could be offset in whole or in part by a decline in the market value of the underlying security.

If a call option expires unexercised, the Fund will realize a short-term capital gain in the amount of the premium on the option less the commission paid. Such a gain, however, may be offset by depreciation in the market value of the underlying security during the option period. If a call option is exercised, the Fund will realize a gain or loss from the sale of the underlying security equal to the difference between the cost of the underlying security and the proceeds of the sale of the security plus the amount of the premium on the option less the commission paid.

The Fund will generally write call options on a covered basis. A call option written by the Fund is "covered" if the Fund owns the underlying security covered by the call or has an absolute and immediate right to acquire that security without additional cash consideration (or for additional cash consideration maintained as Segregated Assets by the Fund's custodian) upon conversion or exchange of other securities held by the Fund. A call option is also deemed to be covered if the Fund holds a call on the same security and in the same principal amount as the call written and the exercise price of the call held (i) is equal to or less than the exercise price of the call written or (ii) is greater than the exercise price of the call written if the difference is maintained as Segregated Assets by the Fund's custodian.

Purchasing put options—The Fund may only purchase put options to the extent that the premiums on all outstanding put options do not exceed 20% of the Fund's total assets. The Fund generally will, at all times during which it holds a put option, own the security covered by such option. With regard to the writing of put options, the Fund will limit the aggregate value of the obligations underlying such put options to 50% of its total assets. A put option purchased by the Fund gives it the right to sell one of its securities for an agreed price up to an agreed date. The Fund intends to purchase put options in order to protect against a decline in the market value of the underlying security below the exercise price less the premium paid for the option ("protective puts"). The ability to purchase put options will allow the Fund to protect unrealized gains in an appreciated security in its portfolio without actually selling the security. If the security does not drop in value, the Fund will lose the value of the premium paid. The Fund may sell a put option that it has previously purchased prior to the sale of the securities underlying such option. Such sale will result in a net gain or loss depending on whether the amount received on the sale is more or less than the premium and other transaction costs paid on the put option that is sold.

The Fund may sell put options purchased on individual portfolio securities. Additionally, the Fund may enter into closing sale transactions. A closing sale transaction is one in which the Fund, when it is the holder of an outstanding option, liquidates its position by selling an option of the same series as the option previously purchased.

Writing put options—The Fund may also write put options on a secured basis, which means that the Fund's custodian will maintain Segregated Assets in an amount not less than the exercise price of the option at all times during the option period. Further, assets segregated or earmarked to cover a sale of a put option will be different from the security or the instrument underlying the option. The amount of Segregated Assets will be adjusted on a daily basis to reflect changes in the market value of the securities covered by the put option written by the Fund. Secured put options will generally be written in circumstances where the Advisor wishes to purchase the underlying security for the Fund's portfolio at a price lower than the current market price of the security. In such event, the Fund would write a secured put option at an exercise price, which, reduced by the premium received on the option, reflects the lower price it is willing to pay. Following the writing of a put option, the Fund may wish to terminate the obligation to buy the security underlying the option by effecting a closing purchase transaction. This is accomplished by buying an option of the same series as the option previously written. The Fund may not, however, effect such a closing transaction after it has been notified of the exercise of the option.

Index options

The Fund may purchase exchange-listed call options on stock indices and fixed income indices and sell such options in closing sale transactions for hedging purposes. The Fund also may purchase call options on indices primarily as a substitute for taking positions in certain securities or a particular market segment. The Fund may also purchase call options on an index to protect against increases in the price of securities underlying that index that the Fund intends to purchase pending its ability to invest in such securities.

In addition, the Fund may purchase put options on stock indices and fixed income indices and sell such options in closing sale transactions. The Fund may purchase put options on broad market indices in order to protect its fully invested portfolio from a general market decline. Put options on market segments may be bought to protect a Fund from a decline in the value of heavily weighted industries in the Fund's portfolio. Put options on stock and fixed income indices may also be used to protect a Fund's investments in the case of a major redemption. The Fund may also write (sell) put and call options on stock indices and fixed income indices. While the option is open, the Fund's custodian will maintain Segregated Assets to cover the transactions, marked-to-market daily in accordance with SEC positions.

Options on indices are similar to regular options except that an option on an index gives the holder the right, upon exercise, to receive an amount of cash if the closing level of the index upon which the option is based is greater than (in the case of a call) or lesser than (in the case of a put) the exercise price of the option. This amount of cash is equal to the difference between the closing price of the index and the exercise price of the option expressed in dollars multiplied by a specified multiple (the "multiplier"). The indices on which options are traded include both US and non-US markets.

Special risks of options on indices

The Fund's purchases of options on indices will subject them to the risks described below.

Because the value of an index option depends upon movements in the level of the index rather than the price of a particular security, whether the Fund will realize gain or loss on the purchase of an option on an index depends upon movements in the level of prices in the market generally or in an industry or market segment, rather than movements in the price of a particular security. Accordingly, successful use by the Fund of options on indices is subject to the Advisor's ability to predict correctly the direction of movements in the market generally or in a particular industry. This requires different skills and techniques than predicting changes in the prices of individual securities.

Index prices may be distorted if trading of a substantial number of securities included in the index is interrupted causing the trading of options on that index to be halted. If a trading halt occurred, the Fund would not be able to close out options that it had purchased and the Fund may incur losses if the underlying index moved adversely before trading resumed. If a trading halt occurred and restrictions prohibiting the exercise of options were imposed through the close of trading on the last day before expiration, exercises on that day would be settled on the basis of a closing index value that may not reflect current price information for securities representing a substantial portion of the value of the index.

If the Fund holds an index option and exercises it before final determination of the closing index value for that day, it runs the risk that the level of the underlying index may change before closing. If such a change causes the exercised option to fall "out-of-the-money," the Fund will be required to pay the difference between the closing index value and the exercise price of the option (multiplied by the applicable multiplier) to the assigned writer. Although the Fund may be able to minimize this risk by withholding exercise instructions until just before the daily cutoff time or by selling rather than exercising the option when the index level is close to the exercise price, it may not be possible to eliminate this risk entirely because the cutoff times for index options may be earlier than those fixed for other types of options and may occur before definitive closing index values are announced.

Options on swap agreements

The Fund may purchase options on swap agreements. For more information about these types of investments, see "Swaps" above.

Exchange-traded notes ("ETNs")

The Fund may invest in ETNs. ETNs are senior, unsecured, unsubordinated debt securities whose returns are linked to the performance of a particular market benchmark or strategy minus applicable fees. ETNs are traded on an exchange (e.g., the New York Stock Exchange ("NYSE")) during normal trading hours. However, investors can also hold the ETN until maturity. At maturity, the issuer pays to the investor a cash amount equal to the principal amount, subject to the day's market benchmark or strategy factor.

ETNs do not make periodic coupon payments or provide principal protection. ETNs are subject to credit risk and the value of the ETN may drop due to a downgrade in the issuer's credit rating, despite the underlying market benchmark or strategy remaining unchanged.

The value of an ETN may also be influenced by time to maturity, level of supply and demand for the ETN, volatility and lack of liquidity in underlying assets, changes in the applicable interest rates, changes in the issuer's credit rating, and economic, legal, political, or geographic events that affect the referenced underlying asset. When the Fund invests in ETNs it will bear its proportionate share of any fees and expenses borne by the ETN. The Fund's decision to sell its ETN holdings may be limited by the availability of a secondary market. In addition, although an ETN may be listed on an exchange, the issuer may not be required to maintain the listing, and there can be no assurance that a secondary market will exist for an ETN.

The timing and character of income and gains derived from ETNs is under consideration by the US Treasury and IRS and may also be affected by future legislation.

An ETN that is tied to a specific market benchmark or strategy may not be able to replicate and maintain exactly the composition and relative weighting of securities, commodities or other components in the applicable market benchmark or strategy. Some ETNs that use leverage can, at times, be relatively illiquid and, thus, they may be difficult to purchase or sell at a fair price. Leveraged ETNs are subject to the same risk as other instruments that use leverage in any form.

The market value of an ETN may differ from their market benchmark or strategy. This difference in price may be due to the fact that the supply and demand in the market for ETN shares at any point in time is not always identical to the supply and demand in the market for the securities, commodities or other components underlying the market benchmark or strategy that the ETN seeks to track. As a result, there may be times when an ETN share trades at a premium or discount to its market benchmark or strategy.

Options on foreign currencies

The Fund also may purchase and write put and call options on foreign currencies (traded on US and foreign exchanges or OTC markets) to manage the Fund's exposure to changes in currency exchange rates. The Fund may purchase and write options on foreign currencies for hedging purposes in a manner similar to that in which futures contracts on foreign currencies or forward contracts will be utilized. For example, a decline in the dollar value of a foreign currency in which portfolio securities are denominated will reduce the dollar value of such securities, even if their value in the foreign currency remains constant. In order to protect against such diminutions in the value of portfolio securities, the Fund may purchase put options on the foreign currency. If the dollar price of the currency does decline, the Fund will have the right to sell such currency for a fixed amount in dollars and will thereby offset, in whole or in part, the adverse effect on its portfolio which otherwise would have resulted.

Conversely, where a rise in the dollar value of a currency in which securities to be acquired are denominated is projected, thereby increasing the dollar price of such securities, the Funds may purchase call options on such currency.

The purchase of such options could offset, at least partially, the effects of the adverse movement in exchange rates. As in the case of other types of options, however, the benefit to the Funds to be derived from purchases of foreign currency options will be reduced by the amount of the premium and related transaction costs. In addition, where currency exchange rates do not move in the direction or to the extent anticipated, the Fund could sustain losses on transactions in foreign currency options that would require it to forego a portion or all of the benefits of advantageous changes in such rates.

The Fund may write options on foreign currencies for the same types of hedging purposes. For example, where the Fund anticipates a decline in the dollar value of foreign currency denominated securities due to adverse fluctuations in exchange rates, it could, instead of purchasing a put option, write a call option on the relevant currency. If the expected decline occurs, the option will most likely not be exercised, and the diminution in the value of portfolio securities will be offset by the amount of the premium received.

Similarly, instead of purchasing a call option to hedge against an anticipated increase in the dollar cost of securities to be acquired, the Fund could write a put option on the relevant currency, which, if rates move in the manner projected, will expire unexercised and allow the Fund to hedge such increased cost up to the amount of the premium. As in the case of other types of options, however, the writing of a foreign currency option will constitute only a partial hedge up to the amount of the premium, and only if rates move in the expected direction. If this does not occur, the option may be exercised and the Fund would be required to purchase or sell the underlying currency at a loss that may not be offset by the amount of the premium. Through the writing of options on foreign currencies, the Fund also may be required to forego all or a portion of the benefit that might otherwise have been obtained from favorable movements in exchange rates.

The Funds may also engage in options transactions for non-hedging purposes. The Funds may use options transactions to gain exposure to a currency when the Advisor believes that exposure to the currency is beneficial to the Fund but believes that the securities denominated in that currency are unattractive.

The Fund may write covered call options on foreign currencies. A call option written on a foreign currency by the Fund is "covered" if the Fund owns the underlying foreign currency covered by the call or has an absolute and immediate right to acquire that foreign currency without additional cash consideration (or for additional cash consideration maintained as Segregated Assets by the Fund's custodian) upon conversion or exchange of other foreign currency held in its portfolio. A call option is also covered if the Fund has a call on the same foreign currency and in the same principal amount as the call written where the exercise price of the call held (a) is equal to or less than the exercise price of the call written, or (b) is greater than the exercise price of the call written if the difference is maintained in Segregated Assets by the Fund's custodian.

With respect to writing put options, at the time the put is written, the Fund's custodian will maintain Segregated Assets in an amount equal in value to the exercise price of the put. The Segregated Assets will be maintained and marked-to-market daily until the put is exercised, has expired or the Fund has purchased a closing put of the same series as the one previously written.

Convertible securities

The Fund may invest in convertible securities, which generally offer lower interest or dividend yields than non-convertible debt securities of similar quality. The value of convertible securities may reflect changes in the value of the underlying common stock. Convertible securities entail less credit risk than the issuer's common stock because they rank senior to common stock. Convertible securities entitle the holder to exchange the securities for a specified number of shares of common stock, usually of the same company, at specified prices within a certain period of time

and to receive interest or dividends until the holder elects to convert. The provisions of a convertible security determine its ranking in a company's capital structure. In the case of subordinated convertible debentures, the holder's claims on assets and earnings are subordinated to the claims of other creditors but are senior to the claims of preferred and common shareholders. In the case of preferred stock and convertible preferred stock, the holder's claim on assets and earnings are subordinated to the claims of all creditors but are senior to the claims of common shareholders.

Contingent convertible instruments. Contingent convertible securities ("CoCos") are a form of hybrid debt security that are intended to either convert into equity or have their principal written down upon the occurrence of certain "triggers." The triggers are generally linked to regulatory capital thresholds or regulatory actions calling into question the issuing banking institution's continued viability as a going concern. CoCos' unique equity conversion or principal write-down features are tailored to the issuing banking institution and its regulatory requirements. Some additional risks associated with CoCos include, but are not limited to:

• Loss absorption risk. CoCos have fully discretionary coupons. This means coupons can potentially be cancelled at the banking institution's discretion or at the request of the relevant regulatory authority in order to help the bank absorb losses.

• Subordinated instruments. CoCos will, in the majority of circumstances, be issued in the form of subordinated debt instruments in order to provide the appropriate regulatory capital treatment prior to a conversion. Accordingly, in the event of liquidation, dissolution or winding-up of an issuer prior to a conversion having occurred, the rights and claims of the holders of the CoCos, such as the Fund, against the issuer in respect of or arising under the terms of the CoCos shall generally rank junior to the claims of all holders of unsubordinated obligations of the issuer. In addition, if the CoCos are converted into the issuer's underlying equity securities following a conversion event (i.e., a "trigger"), each holder will be subordinated due to their conversion from being the holder of a debt instrument to being the holder of an equity instrument.

• Market value will fluctuate based on unpredictable factors. The value of CoCos is unpredictable and will be influenced by many factors including, without limitation: (i) the creditworthiness of the issuer and/or fluctuations in such issuer's applicable capital ratios; (ii) supply and demand for the CoCos; (iii) general market conditions and available liquidity; and (iv) economic, financial and political events that affect the issuer, its particular market or the financial markets in general.

Exchange-traded funds ("ETFs")

Subject to the limitations on investments in investment company securities and its own investment objective, the Fund may invest in securities of ETFs that attempt to track or replicate the performance of a US or foreign market index. The Fund may invest in ETFs that are currently operational and that may be developed in the future. ETFs usually trade on stock exchanges and generally bear certain operational expenses. To the extent the Fund invests in securities of ETFs, the Fund must bear these expenses in addition to the expenses of its own operation.

Investments in ETFs are subject to a variety of risks, including all of the risks of a direct investment in the underlying securities that the ETF holds. For example, the general level of stock prices may decline, thereby adversely affecting the value of the underlying investments of the ETF and, consequently, the value of the ETF. In addition, the market value of the ETF shares may differ from their net asset value because the supply and demand in the market for ETF shares at any point in time is not always identical to the supply and demand in the market for the underlying securities. Also, ETFs that track particular indexes typically will be unable to match the performance of the index exactly due to the ETF's operating expenses and transaction costs.

Real estate investment trusts

The Fund may invest in equity REITs and equity interests issued by REITs and non-US REIT-like entities (collectively, "REITs"). A REIT is a pooled investment vehicle that purchases primarily income-producing real estate, real estate-related loans or other real estate-related interests. The pooled vehicle, typically a trust, then issues shares whose value and investment performance are dependent upon the investment performance of the underlying real estate-related investments. Generally, REITs can be classified as equity REITs, mortgage REITs or hybrid REITs. Equity REITs invest the majority of their assets directly in real property and derive their income primarily from rents and capital gains from appreciation realized through property sales. Equity REITs are further categorized according to the types of real estate securities they own (e.g., apartment properties, retail shopping centers, office and industrial properties, hotels, health-care facilities, manufactured housing and mixed-property types). Mortgage REITs invest the majority of their assets in real estate mortgages and derive their income primarily from interest payments. Hybrid REITs combine the characteristics of both equity REITs and mortgage REITs. Debt securities issued by REITs are, for the most part, general and unsecured obligations and are subject to risks associated with REITs.

A REIT is not taxed on income distributed to its shareholders if it complies with regulatory requirements relating to its organization, ownership, assets and income, and with a regulatory requirement that it distribute to its shareholders or unitholders at least 90% of its taxable income for each taxable year. In addition, a shareholder in the Fund, by investing in REITs indirectly through the Fund, will bear not only the shareholder's proportionate share of the expenses of the Fund, but also, indirectly, the management expenses of the underlying REITs. REITs are subject to risks related to the specialized skill of their management, changes in value of the properties the REITs own, the quality of any credit extended by the REITs, and general economic and other factors. An investment in REITs includes the possibility of a decline in the value of real estate, possible lack of available money for loans to purchase real estate, risks related to general and local economic conditions, overbuilding and increased competition, increases in property taxes and operating expenses, prolonged vacancies in rental properties, changes in zoning laws, casualty or condemnation losses, variations in rental income, changes in neighborhood values, the appeal of properties to tenants, costs of clean up and liability to third parties resulting from environmental problems, costs associated with damage from natural disasters not covered by insurance, increases in interest rates and changes to tax and regulatory requirements.

In addition, some REITs may have limited diversification and may be subject to risks inherent in investments in a limited number of properties in a narrow geographic area or in a single property type, such as being more susceptible to adverse developments affecting a single project or market segment than more broadly diversified investments. Also, the performance of a REIT may be affected by its failure to qualify for tax-free pass-through of income, or the REIT's failure to maintain exemption from registration under the Act.

Special purpose acquisition companies ("SPACs")

The Fund may invest in stock, warrants, and other securities of SPACs or similar special purpose entities that pool funds to seek potential acquisition opportunities. Until an acquisition is completed, a SPAC generally invests its assets in US government securities, money market securities and cash. If an acquisition that meets the requirements for the SPAC is not completed within a pre-established period of time, the funds invested in the SPAC are returned to its shareholders. Because SPACs and similar entities do not have an operating history or ongoing business other than seeking acquisitions, the value of their securities is particularly dependent on the ability of the SPAC's management to identify and complete a profitable acquisition. Some SPACs may pursue acquisitions only within certain industries or regions, which may increase the volatility of their prices. In addition, these securities, which are typically traded in the OTC market, may be considered illiquid and/or be subject to restrictions on resale.

Equity participation notes or equity linked notes (collectively "EPNs")

The Fund may invest up to 10% of its total assets in EPNs. An EPN is a debt instrument whose return is determined by the performance of a single equity security. When purchasing an EPN, the Fund pays the counterparty the current value of the underlying security plus a commission. During the time that the EPN is owned, the price of the EPN will fluctuate in accordance with the price fluctuation of the underlying security, with a currency adjustment to

reflect the fact that EPNs are generally priced in US dollars whereas the underlying security is generally denominated in a foreign currency. At maturity or sale, the EPN owner's profit or loss is the sum of the appreciation/depreciation of the underlying security, plus the appreciation/depreciation of the underlying security's currency relative to the US dollar, less any commissions paid. The Fund only invests in EPNs for which the underlying security is a permissible investment pursuant to the Fund's investment policies and restrictions.

The Fund invests in EPNs only to gain exposure to equities in foreign markets where direct investments in equity securities are not easily accessible or otherwise obtainable. The Fund may only invest in EPNs that are unleveraged and that do not have a "cap" or a "floor" on the maximum principal amount to be repaid to the Fund at maturity. In addition, the Fund may only invest in EPNs that are based on the performance of a single underlying equity security; that have no premium or discount in relation to the underlying asset; and that provide for the retention of dividend rights. Investments in EPNs will only be made if the counterparty is a financial institution rated at least A1 by S&P or P1 by Moodys. EPNs are not considered equity securities for purposes of the Fund's policy to invest 80% of its net assets in equity securities.

EPNs possess the risks associated with the underlying security, such as market risk, and, with respect to EPNs based on foreign securities, foreign securities and currency risks. EPNs, however, involve greater risks than if the Fund had invested in the underlying security directly, since, in addition to general market and foreign securities risks, EPNs are subject to counterparty, credit and illiquidity risks. Counterparty risk is the risk that the issuer of the EPN may fail to pay the full amount due at maturity or redemption. In addition, an investment in an EPN creates exposure to the credit risk of the issuing financial institution. Also, the secondary market for EPNs may be limited, and the lack of liquidity in the secondary market may make EPNs difficult to dispose of and to value. In choosing EPNs appropriate for the Fund, the Advisor will select only those EPNs that have demonstrated patterns of brokers willing to provide liquidity on demand to ensure that the EPNs maintain their liquidity. The Fund, however, will treat EPNs as illiquid and subject to its overall limit on illiquid investments of 15% of its net assets.

Investments relating to UBS Sustainable Development Bank Bond Fund

Fixed income securities

The Fund may invest in all types of fixed income securities of US and non-US issuers, as described in this SAI, including, but not limited to, governments and governmental entities and supranational issuers as well as corporations and other issuers. These securities may include US and non-US dollar denominated securities that reflect a broad range of investment securities, qualities and sectors. The Fund may also invest in floating rate and variable rate obligations, which are debt securities that provide for periodic adjustments in the interest rate paid on the debt security. The Fund may also invest in US Treasury Securities, which include bills, notes, bonds, and other debt securities issued by the US Treasury. These are direct obligations of the US government and differ mainly in the length of their maturities. Other US government securities in which the Fund may invest may be backed by the full faith and credit of the US government or supported primarily or solely by the creditworthiness of the government-related issuer.

Securities issued by agencies and instrumentalities of the US government that are supported by the full faith and credit of the United States, such as securities issued by the Federal Housing Administration and Ginnie Mae (formally known as Government National Mortgage Association or GNMA), present little credit risk but are not free of credit risk. Other securities issued by agencies and instrumentalities sponsored by the US government that are supported only by the issuer's right to borrow from the US Treasury, subject to certain limitations, such as securities issued by Federal Home Loan Banks, and securities issued by agencies and instrumentalities sponsored by the US government that are supported only by the credit of the issuing agencies are subject to a greater degree of credit risk.

Any controversy or ongoing uncertainty regarding the status of negotiations in the US Congress to increase the statutory debt ceiling could increase the risk that the US government may default on payments on certain US government securities, including those held by the Fund, which could have a material adverse impact on the Fund. In recent years, the long-term US credit rating was downgraded by at least one major rating agency as a result of disagreements within the US government over raising the debt ceiling to repay outstanding obligations, and similar situations in the future could increase volatility in both stock and bond markets, result in higher interest rates, lower prices of US Treasury securities and increase the costs of different kinds of debt. It is at least theoretically possible that under certain scenarios the US government could default on its debt, including US Treasuries. UBS AM cannot predict the effects of these or similar events in the future on the US economy and securities markets or on the Fund's portfolio.

The Advisor considers investment grade securities to include: (i) securities with a minimum rating of Baa3 by Moody's or BBB- by S&P or Fitch, comparably rated by another nationally recognized statistical rating organization ("NRSRO"), (ii) securities with comparable short-term NRSRO ratings, or (iii) unrated securities determined by the Advisor to be of comparable quality, each at the time of purchase. The descriptions of debt securities ratings may be found in Appendix A.

Yield factors

The yield on a bond depends on a variety of factors, including general municipal or fixed income security market conditions, the financial condition of the issuer, the size of the particular offering, the maturity, credit quality and rating of the issue and/or expectations regarding changes in tax rates. The Fund may invest in bonds with a broad range of maturities, based on the Advisor's judgment of current and future market conditions as well as other factors, such as the Fund's liquidity needs. Generally, the longer the maturity of a bond, the higher the rate of interest paid and the greater the volatility.

Duration

Duration is a measure of the price sensitivity of a fixed income investment or portfolio to a change in interest rates. Duration incorporates the bond's yield, coupon interest payments, final maturity and call features into one measure and is one of the fundamental tools used by the Advisor in portfolio selection and yield curve positioning for the Fund's bond investments. Duration was developed as a more precise alternative to the concept of "term to maturity." Traditionally, a bond's "term to maturity" has been used as a proxy for the sensitivity of the security's price to changes in interest rates (which is the "interest rate risk" or "volatility" of the security). However, "term to maturity" measures only the time until the scheduled final payment on the bond, taking no account of the pattern of payments prior to maturity.

Duration takes the length of the time intervals between the present time and the time that the interest and principal payments are scheduled or, in the case of a callable bond, expected to be made, and weights them by the present values of the cash to be received at each future point in time. For any bond with interest payments occurring prior to the payment of principal, duration is always less than maturity. For example, depending on its coupon and the level of market yields, a Treasury note with a remaining maturity of five years might have a duration of 4.5 years. For mortgage-backed and other securities that are subject to prepayments, put or call features or adjustable coupons, the difference between the remaining stated maturity and the duration is likely to be much greater.

Duration allows the Advisor to make certain predictions as to the effect that changes in the level of interest rates will have on the value of a Fund's portfolio of bonds. For example, when the level of interest rates increases by 1%, a bond having a positive duration of three years generally will decrease by approximately 3%. Thus, if the Advisor calculates the duration of a Fund's portfolio of bonds as three years, it normally would expect the portfolio to change in value by approximately 3% for every 1% change in the level of interest rates. However, various factors, such as changes in anticipated prepayment rates, qualitative considerations and market supply and demand, can cause particular securities to respond somewhat differently to changes in interest rates than indicated in the above

example. Moreover, in the case of mortgage-backed and other complex securities, duration calculations are estimates and are not precise. This is particularly true during periods of market volatility. Accordingly, the net asset value of the Fund's portfolio of bonds may vary in relation to interest rates by a greater or lesser percentage than indicated by the above example.

Futures, options and options on futures have durations that, in general, are closely related to the duration of the securities that underlie them. Holding long futures or call option positions will lengthen portfolio duration by approximately the same amount as would holding an equivalent amount of the underlying securities. Short futures or put options have durations roughly equal to the negative duration of the securities that underlie these positions and have the effect of reducing portfolio duration by approximately the same amount as would selling an equivalent amount of the underlying securities.

There are some situations in which the standard duration calculation does not properly reflect the interest rate exposure of a security. For example, floating and variable rate securities often have final maturities of ten or more years; however, their interest rate exposure corresponds to the frequency of the coupon reset. Another example where the interest rate exposure is not properly captured by the standard duration calculation is the case of mortgage-backed securities. The stated final maturity of such securities is generally 30 years, but current prepayment rates are critical in determining the securities' interest rate exposure. In these and other similar situations, the Advisor will use more sophisticated analytical techniques that incorporate the economic life of a security into the determination of its duration and, therefore, its interest rate exposure.

Development bank bonds

UBS Sustainable Development Bank Bond Fund will invest substantially all of its assets in development bank bonds. Development banks are financial organizations formed by government entities to promote economic and social development. Development banks generally use their capital for projects that seek to improve the state of the developing world, promote sustainable growth, and raise living standards. The value of the Fund's investments in bonds issued by development banks may fall due to adverse financial market developments in the US and abroad. Borrowers from development banks include foreign countries, which may include emerging market countries, and borrowers of specific development banks also include the private sector with or without government guarantee. Therefore, negative economic, social and political developments could affect the ability of a borrower to repay its loan to the development bank and thus affect its financial condition. In addition, investments in such development bank bonds may involve special risks because the Fund may have limited legal recourse in the event of default. Also, development bank bonds may sometimes be less liquid and more difficult to sell and to value than high-quality securities of US issuers. Bonds issued by a development bank are backed by the shareholders of the development bank. The development bank may be supported via various mechanisms, including preferred creditor status, equity injections by its shareholders, and callable capital, even though the latter may have never been tested with respect to an issuer. Changes in the shareholder structure of a development bank or changes in the strength of the support by its shareholders could affect the credit rating and thus the value of the bonds issued by the development bank.

Eurodollar securities

The Fund may invest in Eurodollar securities, which are fixed income securities of a US issuer or a foreign issuer that are issued outside the United States. Interest and dividends on Eurodollar securities are payable in US dollars.

Floating rate and variable rate obligations

The Fund may invest in floating rate and variable rate obligations. Floating rate and variable rate obligations are bonds that bear interest at rates that are not fixed, but that vary with changes in specified market rates or indices. The interest rate on floating rate or variable rate securities ordinarily is readjusted on the basis of the prime rate of the bank that originated the financing or some other index or published rate, such as the 90-day US Treasury bill rate, or is otherwise reset to reflect market rates of interest. Generally, these interest rate adjustments cause the

market value of floating rate and variable rate securities to fluctuate less than the market value of fixed rate obligations. Accordingly, as interest rates decrease or increase, the potential for capital appreciation or capital depreciation is less than for fixed rate obligations. Floating rate or variable rate obligations typically permit the holder to demand payment of principal from the issuer or remarketing agent at par value prior to maturity and may permit the issuer to prepay principal, plus accrued interest, at its discretion after a specified notice period. Frequently, floating rate or variable rate obligations and/or the demand features thereon are secured by letters of credit or other credit support arrangements provided by banks or other financial institutions, the credit standing of which affects the credit quality of the obligations. Changes in the credit quality of these institutions could cause losses to the Fund and adversely affect its share price.

When-issued and delayed delivery securities

The Fund may purchase securities offered on a "when-issued" or "delayed delivery" basis. When so offered, the price, which is generally expressed in yield terms, is fixed at the time the commitment to purchase is made, but delivery and payment for the when-issued or delayed delivery securities take place at a later date. During the period between purchase and settlement, no payment is made by the purchaser to the issuer and no interest on the when-issued or delayed delivery security accrues to the purchaser. While when-issued or delayed delivery securities may be sold prior to the settlement date, it is intended that the Fund will purchase such securities with the purpose of actually acquiring them unless a sale appears desirable for investment reasons. At the time the Fund makes the commitment to purchase a security on a when-issued or delayed delivery basis, it will record the transaction and reflect the value of the security in determining its net asset value. The market value of when-issued or delayed delivery securities may be more or less than the purchase price. The Advisor does not believe that the Fund's net asset value or income will be adversely affected by its purchase of securities on a when-issued or delayed delivery basis. The Fund's custodian will maintain Segregated Assets equal in value to the purchase price and the interest rate payable on the securities which are fixed on the purchase commitment date or at the time of settlement for when-issued or delayed delivery securities, marked-to-market daily, in accordance with pertinent SEC positions.

When-issued and delayed-delivery transactions also are subject to the risk that a counterparty may become bankrupt or otherwise fail to perform its obligations due to financial difficulties, including making payments to the Fund. The Fund may obtain no or only limited recovery in a bankruptcy or other organizational proceedings, and any recovery may be significantly delayed.

Asset-backed securities

The Fund may invest a portion of its assets in debt obligations known as "asset-backed securities." Asset-backed securities are securities that represent a participation in, or are secured by and payable from, a stream of payments generated by particular assets, most often a pool or pools of similar assets (e.g., receivables on home equity and credit loans and receivables regarding automobile, credit card, mobile home and recreational vehicle loans, wholesale dealer floor plans and leases).

Such receivables are securitized in either a pass-through or a pay-through structure. Pass-through securities provide investors with an income stream consisting of both principal and interest payments in respect of the receivables in the underlying pool. Pay-through asset-backed securities are debt obligations issued usually by a special purpose entity The securities are collateralized by the various receivables and the payments on the underlying receivables provide the proceeds to pay the debt service on the debt obligations issued. The Fund may invest in these and other types of asset-backed securities that may be developed in the future.

The credit quality of these securities depends primarily upon the quality of the underlying assets and the level of credit support and/or enhancement provided. Such asset-backed securities are subject to the same prepayment risks as mortgage-backed securities. For federal income tax purposes, the Fund will be required to accrue income on pay-through asset-backed securities using the "catch-up method," with an aggregate prepayment assumption.

The credit quality of most asset-backed securities depends primarily on the credit quality of the assets underlying such securities, how well the entity issuing the security is insulated from the credit risk of the originator or any other affiliated entities, and the amount and quality of any credit support provided to the securities. The rate of principal payment on asset-backed securities generally depends on the rate of principal payments received on the underlying assets, which in turn may be affected by a variety of economic and other factors. As a result, the yield on any asset-backed security is difficult to predict with precision, and the actual yield to maturity may be more or less than the anticipated yield to maturity. Asset-backed securities may be classified as "pass-through certificates" or "collateral-ized obligations."

Asset-backed securities are often backed by a pool of assets representing the obligations of a number of different parties. To lessen the effect of failures by obligors on underlying assets to make payment, such securities may contain elements of credit support. Such credit support falls into two categories: (i) liquidity protection; and (ii) protection against losses resulting from ultimate default by an obligor on the underlying assets. Liquidity protection refers to the provision of advances, generally by the entity administering the pool of assets, to ensure that the receipt of payments due on the underlying pool is timely. Protection against losses resulting from ultimate default enhances the likelihood of payments of the obligations on at least some of the assets in the pool. Such protection may be provided through guarantees, insurance policies or letters of credit obtained by the issuer or sponsor from third parties, through various means of structuring the transaction or through a combination of such approaches. The Fund will not pay any additional fees for such credit support, although the existence of credit support may increase the price of a security.

Due to the shorter maturity of the collateral backing such securities, there is less of a risk of substantial prepayment than with mortgage-backed securities. Such asset-backed securities do, however, involve certain risks not associated with mortgage-backed securities, including the risk that security interests cannot be adequately, or in many cases, ever, established. In addition, the market for asset-backed securities may experience periods of extreme volatility, which may negatively impact market liquidity conditions. In addition, with respect to credit card receivables, a number of state and federal consumer credit laws give debtors the right to set off certain amounts owed on the credit cards, thereby reducing the outstanding balance. In the case of automobile receivables, there is a risk that the holders may not have either a proper or first security interest in all of the obligations backing such receivables due to the large number of vehicles involved in a typical issuance and technical requirements under state laws. Therefore, recoveries on repossessed collateral may not always be available to support payments on the securities.

Examples of credit support arising out of the structure of the transaction include "senior-subordinated securities" (multiple class securities with one or more classes subordinate to other classes as to the payment of principal thereof and interest thereon, with the result that defaults on the underlying assets are borne first by the holders of the subordinated class), creation of "reserve funds" (where cash or investments, sometimes funded from a portion of the payments on the underlying assets, are held in reserve against future losses) and "over collateralization" (where the scheduled payments on, or the principal amount of, the underlying assets exceeds that required to make payments of the securities and pay any servicing or other fees). The degree of credit support provided for each issue is generally based on historical credit information with respect to the level of credit risk associated with the underlying assets. Delinquencies or losses in excess of those anticipated could adversely affect the return on an investment in such issue.

The Fund may invest asset-backed securities that are categorized as collateralized debt obligations ("CDOs"). CDOs include collateralized bond obligations ("CBOs"), collateralized loan obligations ("CLOs") and other similarly structured securities. A CBO is a trust that is backed by a diversified pool of high risk, below investment grade fixed income securities. A CLO is a trust typically collateralized by a pool of loans, which may include, among others, domestic and foreign senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade or equivalent unrated loans. CDOs may charge management fees and administrative expenses.

Zero coupon and delayed interest securities

The Fund may invest in zero coupon or delayed interest securities, which pay no cash income until maturity or a specified date when the securities begin paying current interest (the "cash payment date") and are sold at substantial discounts from their value at maturity. When held to maturity or cash payment date, the entire income of such securities, which consists of accretion of discount, comes from the difference between the purchase price and the securities' value at maturity or cash payment date. The discount varies depending on the time remaining until maturity or cash payment date, prevailing interest rates, liquidity of the security and the perceived credit quality of the issuer. The discount, in the absence of financial difficulties of the issuer, decreases as the final maturity or cash payment date of the security approaches. The market prices of zero coupon and delayed interest securities are generally more volatile and more likely to respond to changes in interest rates than the market prices of securities having similar maturities and credit qualities that pay interest periodically.

Zero coupon securities are subject to greater market value fluctuations from changing interest rates than debt obligations of comparable maturities that make current distributions of interest (cash). Zero coupon convertible securities offer the opportunity for capital appreciation as increases (or decreases) in market value of such securities closely follow the movements in the market value of the underlying common stock. Zero coupon convertible securities generally are expected to be less volatile than the underlying common stocks, as they usually are issued with short maturities (15 years or less) and are issued with options and/or redemption features exercisable by the holder of the obligation, entitling the holder to redeem the obligation and receive a defined cash payment.

Zero coupon securities include securities issued directly by the US Treasury, and US Treasury bonds or notes and their unmatured interest coupons and receipts for their underlying principal ("coupons") which have been separated by their holder, typically a custodian bank or investment brokerage firm. A holder will separate the interest coupons from the underlying principal (the "corpus") of the US Treasury security. A number of securities firms and banks have stripped the interest coupons and receipts and then resold them in custodial receipt programs with a number of different names, including "Treasury Income Growth Receipts" ("TIGRS") and Certificate of Accrual on Treasuries ("CATS"). The underlying US Treasury bonds and notes themselves are held in book-entry form at the Federal Reserve Bank or, in the case of bearer securities (i.e., unregistered securities that are owned ostensibly by the bearer or holder thereof), in trust on behalf of the owners thereof. Counsel to the underwriters of these certificates or other evidences of ownership of the US Treasury securities has stated that for federal tax and securities purposes, in its opinion, purchasers of such certificates, such as the Fund, most likely will be deemed the beneficial holder of the underlying US government securities.

The US Treasury has facilitated transfers of ownership of zero coupon securities by accounting separately for the beneficial ownership of particular interest coupon and corpus payments on Treasury securities through the Federal Reserve book-entry record-keeping system. The Federal Reserve program as established by the US Treasury Department is known as "STRIPS" or "Separate Trading of Registered Interest and Principal of Securities." Under the STRIPS program, the Fund will be able to have its beneficial ownership of zero coupon securities recorded directly in the book-entry record-keeping system in lieu of having to hold certificates or other evidences of ownership of the underlying US Treasury securities.

When US Treasury obligations have been stripped of their unmatured interest coupons by the holder, the principal or corpus is sold at a deep discount because the buyer receives only the right to receive a future fixed payment on the security and does not receive any rights to periodic interest (cash) payments. Once stripped or separated, the corpus and coupons may be sold separately. Typically, the coupons are sold separately or grouped with other coupons with like maturity dates and sold in such bundled form. Purchasers of stripped obligations acquire, in effect, discount obligations that are economically identical to the zero coupon securities that the US Treasury sells itself. These stripped securities are also treated as zero coupon securities with original issue discount for tax purposes.

Other investments

The Board may, in the future, authorize a Fund to invest in securities other than those listed in this SAI and in the Prospectus, provided such investment would be consistent with such Fund's investment objective and that it would not violate any fundamental investment policies or restrictions applicable to the Fund.

Summary of risks

The principal risks of investing in the Funds are described in the risks sections of the Prospectus.

Cybersecurity risk

The Funds, like all companies, may be susceptible to operational and information security risks. Cybersecurity failures or breaches of the Funds or their service providers or the issuers of securities in which the Funds invest have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, the inability of Fund shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, and/or additional compliance costs. The Funds and their shareholders could be negatively impacted as a result.

Investment restrictions

The investment restrictions set forth below are fundamental policies and may not be changed as to a Fund without the approval of a majority of the outstanding voting securities (as defined in the Act) of the Fund. Unless otherwise indicated, all percentage limitations listed below apply to the Funds only at the time of the transaction. Accordingly, if a percentage restriction is adhered to at the time of investment, a later increase or decrease in the percentage that results from a relative change in values or from a change in a Fund's total assets will not be considered a violation. Each Fund may not:

(i) Purchase or sell real estate, except that the Fund may purchase or sell securities of real estate investment trusts;

(ii) Purchase or sell commodities, except to the extent permitted by the Act or any rules, exemptions or interpretations thereunder that may be adopted, granted or issued by the SEC;

(iii) Issue securities senior to the Fund's presently authorized shares of beneficial interest, except that this restriction shall not be deemed to prohibit the Fund from: (a) making any permitted borrowings, loans or pledges; (b) entering into options, futures contracts, forward contracts, repurchase transactions, or reverse repurchase transactions; or (c) making short sales of securities to the extent permitted by the Act and any rule or order thereunder, or SEC staff interpretations thereof;

(iv) Make loans to other persons, except: (a) through the lending of its portfolio securities or to affiliated investment companies to the extent permitted by the Act or any exemptions therefrom that may be granted to the SEC; (b) through the purchase of debt securities, loan participations and/or engaging in direct corporate loans for investment purposes in accordance with its investment objectives and policies; and (c) to the extent the entry into a repurchase agreement is deemed to be a loan;

(v) Borrow money in excess of 33¹/₃% of the value of its assets, except as a temporary measure for extraordinary or emergency purposes to facilitate redemptions. All borrowings will be done from a bank and to the extent that such borrowing exceeds 5% of the value of the Fund's assets, asset coverage of at least 300% is required;

(vi) Act as an underwriter, except to the extent the Fund may be deemed to be an underwriter when selling its own shares.

With respect to the real estate restriction described in (i) above, the restriction does not prevent the Fund from investing in REITs or similar real estate securities.

The UBS Engage For Impact Fund may not:

(vii) Purchase the securities of any one issuer (other than the US government or any of its agencies or instrumentalities or securities of other investment companies) if immediately after such investment: (a) more than 5% of the value of the Fund's total assets would be invested in such issuer; or (b) more than 10% of the outstanding voting securities of such issuer would be owned by the Fund, except that up to 25% of the value of the Fund's total assets may be invested without regard to such 5% and 10% limitations;

(viii) Concentrate (invest more than 25% of its net assets) in securities of issuers in a particular industry (other than securities issued or guaranteed by the US government or any of its agencies); and

The UBS Sustainable Development Bank Bond Fund may not:

(ix) Concentrate (invest more than 25% of its net assets) in securities of issuers in a particular industry (other than securities issued or guaranteed by the US government or any of its agencies), except that the Fund will, under normal circumstances, invest at least 25% of its net assets in issuers related to development banks.

Management of the Trust

Organization of the Board

The Board is responsible for establishing the Trust's policies and for overseeing the management of the Trust and each Fund. The Board appoints the officers of the Trust, who, along with third-party service providers, are responsible for administering the day-to-day operations of the Trust. The Board is comprised of five trustees that are not considered to be "interested persons" by reason of their relationship with the Trust's management or otherwise as defined under the Act ("Independent Trustees"). Frank K. Reilly, an Independent Trustee, is Chairman of the Board. As Chairman of the Board, Mr. Reilly approves agendas for Board meetings and generally facilitates communication and coordination among the Independent Trustees and between the Independent Trustees and management. Ms. Adela Cepeda acts as liaison between the Trust's Chief Compliance Officer ("CCO") and the Independent Trustees with respect to compliance matters between scheduled Board meetings.

The Board meets in person at least four times each year. At each in-person meeting, the Independent Trustees meet in executive session to discuss matters outside the presence of management. In addition, the Board holds special telephonic meetings throughout the year, and the Trustees also discuss other matters on a more informal basis at other times.

The Board has two standing committees: an Audit Committee and a Nominating, Compensation and Governance Committee (the "Nominating Committee"). As described below, through these Committees, the Independent Trustees have direct oversight of the Trust's accounting and financial reporting policies, the selection and nomination of candidates to the Board and the Trust's governance procedures.

Each Independent Trustee (except Abbie J. Smith) sits on the Trust's Audit Committee, which has the responsibility, among other things, to: (i) select, oversee and approve the compensation of the Trust's independent registered public accounting firm; (ii) oversee the Trust's accounting and financial reporting policies and practices, its internal controls and, as appropriate, the internal controls of certain service providers; and (iii) oversee the quality and objectivity of the Fund's financial statements and the independent audit(s) thereof. The Audit Committee met four times during the fiscal year ended June 30, 2018.

Each Independent Trustee sits on the Trust's Nominating Committee, which has the responsibility, among other things, to: (i) make recommendations and to consider shareholder recommendations for nominations for Board members; (ii) review Board governance procedures and recommend any appropriate changes to the full Board; (iii) periodically review Trustee compensation and recommend any changes to the Independent Trustees as a group; and (iv) make recommendations to the full Board for nominations for membership on all committees, review all committee assignments annually and periodically review the responsibilities and need for all committees of the Board. The Nominating Committee met one time during the fiscal year ended June 30, 2018.

The Board also at times creates other committees of Board members to assist in the evaluation of specific matters. The Independent Trustees have also engaged independent legal counsel, and the Trustees have from time to time engaged consultants and other advisors to assist them in performing their oversight responsibilities.

The Board believes that the existing Board structure for the Trust is appropriate because it allows the Independent Trustees to exercise independent judgment in evaluating the governance of the Trust and performance of the Fund's service providers.

Board oversight of risk management

The Board, as a whole, considers risk management issues as part of its general oversight responsibilities throughout the year at regular board meetings, through regular reports that have been developed by Fund management and the Advisor. These reports address certain investment, valuation, liquidity, and compliance matters. The Board also may receive special written reports or presentations on a variety of risk issues, either upon the Board's request or upon the initiative of the Advisor, including discussions with the Advisor's Chief Risk Officer. In addition, the Audit Committee of the Board meets at least annually with the Advisor's internal audit group to discuss the results of the internal audit group's examinations of the functions and processes of the Advisor that affect the Fund and to be advised regarding the internal audit group's plans for upcoming audits.

With respect to investment risk, the Board receives regular written reports describing and analyzing the investment performance of each Fund. The Board discusses these reports and the performance of each Fund and investment risks with management of the Advisor at the Board's regular meetings. To the extent that the Advisor seeks to change a Fund's investment strategy that may have a material impact on the Fund's risk profile or invest in a new type of security or instrument, the Board generally is provided information on such proposed changes for the Board's approval. In addition, the Advisor provides, at the request of the Board, an annual report on the use of derivatives by the Fund.

With respect to valuation, the Advisor provides regular written reports to the Board that enables the Board to monitor fair valued securities in each Fund. Such reports also include information concerning illiquid securities held by a Fund. In addition, the Audit Committee reviews valuation procedures and pricing results with the Trust's independent registered public accounting firm in connection with such Committee's review of the results of the audit of the Fund's year-end financial statements.

With respect to liquidity, upon applicable compliance dates of Rule 22e-4, the Board will be required to approve a liquidity risk management program, which provides the framework for evaluating the liquidity of the Funds' investments. The Board will also be required to approve the designation of person(s) designated to administer such program, and review, no less frequently than annually, a written report prepared by the person(s) designated to administer the program that addresses the operation of the program and assesses its adequacy and effectiveness of implementation.

With respect to compliance risks, the Board receives regular compliance reports prepared by the Advisor's compliance group and meets regularly with the Trust's CCO to discuss compliance issues, including compliance risks. As required under SEC rules, the Independent Trustees meet at least quarterly in executive session with the CCO, and the Fund's CCO prepares and presents an annual written compliance report to the Board. The Board adopts compliance policies and procedures for the Fund and receives information about the procedures in place for the Trust's service providers. The compliance policies and procedures are specifically designed to detect and prevent violations of the federal securities laws.

At the request of the Board, the Advisor also has provided presentations to the Board with respect to the Advisor's operational risk management.

Trustee qualifications

When a vacancy occurs on the Board, the Nominating Committee of the Board evaluates a candidate's qualification for Board membership and the independence of such candidate from the Advisor and other principal service providers. The Nominating Committee will consider nominees recommended by Qualifying Fund Shareholders if an Independent Trustee vacancy on the Board occurs. A Qualifying Fund Shareholder is a shareholder that: (i) owns of record, or beneficially through a financial intermediary, 1/2 of 1% or more of the Trust's outstanding shares and (ii) has been a shareholder of at least 1/2 of 1% of the Trust's total outstanding shares for 12 months or more prior

to submitting the recommendation to the Nominating Committee. In order to recommend a nominee, a Qualifying Fund Shareholder should send a letter to the chairperson of the Nominating Committee, Adela Cepeda, care of Mark Kemper, the Secretary of the Trust, at UBS Asset Management, One North Wacker Drive, Chicago, Illinois 60606, and indicate on the envelope "Nominating Committee." The Qualifying Fund Shareholder's letter should include: (i) the name and address of the Qualifying Fund Shareholder making the recommendation; (ii) the number of shares of each class and series of shares of the Trust that are owned of record and beneficially by such Qualifying Fund Shareholder and the length of time that such shares have been so owned by the Qualifying Fund Shareholder; (iii) a description of all arrangements and understandings between such Qualifying Fund Shareholder and any other person or persons (naming such person or persons) pursuant to which the recommendation is being made; (iv) the name and address of the nominee; and (v) the nominee's resume or curriculum vitae. The Qualifying Fund Shareholder's letter must be accompanied by a written consent of the individual to stand for election if nominated for the Board and to serve if elected by shareholders.

The Nominating Committee of the Board believes that it is in the best interests of the Trust and its shareholders to obtain highly-qualified individuals to serve as members of the Board. In assessing Trustees for the Board, the Nominating Committee may consider factors such as the person's judgment, skill, diversity and experience with investment companies and other organizations of comparable purpose, complexity and size and subject to similar legal restrictions and oversight and the interplay of a Trustee or candidate's experience with the experience of other Board members. The Board believes that collectively, the Trustees currently serving on the Board have balanced and diverse experience, qualifications, attributes and skills that allow the Board to effectively oversee the management of the Trust and protect the interests of shareholders. The Board noted that each Independent Trustee had experience serving as a director on the boards of operating companies and/or other investment companies. The Board also considered that Adela Cepeda, John J. Murphy and J. Mikesell Thomas have or had careers in the financial services or investment industries, including holding executive positions in companies engaged in these industries, which allows these Trustees to bring valuable, relevant experience as members of the Board. The Board also noted that both Frank K. Reilly and Abbie J. Smith, as Professors of Finance and Accounting, respectively, also have the relevant skills and experience to serve as members of the Board.

The Trustees and executive officers of the Trust, along with their principal occupations over the past five years and their affiliations, if any, with UBS AM, are listed below. None of the Trustees is an "interested person" (as defined in the 1940 Act) of the Trust.

Independent trustees

Name,
address,
and age

Position(s) held
with trust

Term of office¹and length of
time served

Principal occupation(s)
during past 5 years

Number of portfolios
in fund complex
overseen by trustee

Other directorships held
by trustee during
past 5 years

Adela Cepeda; 60
PFM Financial
Advisors LLC,
222 N. LaSalle
Street
Suite 910
Chicago,
IL 60601

Trustee

Since 2004

Ms. Cepeda is managing director of PFM Financial Advisors LLC (since 2016). From 1995 to 2016, Ms. Cepeda was the founder and president of A.C. Advisory, Inc.

Ms. Cepeda is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Ms. Cepeda is director (since 2012) of BMO Financial Corp. (US holding company for the BMO Harris Bank N.A.), director of the Mercer Funds (9 portfolios) (since 2005) and trustee of the Morgan Stanley Smith Barney Consulting Group Capital Markets Funds (11 portfolios) (since 2008).

John J. Murphy;
74
268 Main Street
P.O. Box 718
Gladstone,
N.J. 07934

Trustee

Since 2009

Mr. Murphy is the president of Murphy Capital Management (investment advisor) (since 1983).²

Mr. Murphy is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Mr. Murphy is director (since 2007) of the Legg Mason Equity Funds (54 portfolios); and is a trustee of Morgan Stanley Smith Barney Consulting Group Capital Markets Funds (11 portfolios).

Frank K. Reilly;
82
Mendoza College of Business University of Notre Dame
Notre Dame,
IN 46556-5646

Chairperson and Trustee

Since 1992

Mr. Reilly is the Bernard J. Hank Professor Emeritus of Finance in the Mendoza College of Business at the University of Notre Dame (since 1982) and is a Chartered Financial Analyst (CFA).

Mr. Reilly is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Mr. Reilly is a director (since 1994) of Discover Bank and Bank of New Castle, both banks are subsidiaries of Discover Financial Services, and Mr. Reilly is chairman of the audit committee for both banks.

Name,
address,
and age

Position(s) held
with trust

Term of office¹and length of
time served

Principal occupation(s)
during past 5 years

Number of portfolios
in fund complex
overseen by trustee

Other directorships held
by trustee during
past 5 years

Abbie J. Smith;
65
University of Chicago Booth School of Business
5807 S. Woodlawn Avenue
Chicago, IL 60637

Trustee

Since 2009

Ms. Smith is a Boris and Irene Stern Distinguished Service Professor of Accounting in the University of Chicago Booth School of Business (since 1980). Formerly, Ms. Smith was a co-founding partner and director of research of Fundamental Investment Advisors (hedge fund) (co-founded in 2004, commenced operations in 2008) (from 2008 to 2010).

Ms. Smith is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Ms. Smith is a director (since 2000) of HNI Corporation (formerly known as HON Industries Inc.) (office furniture) and a director and also a member of the audit committee (since May 2017). Ms. Smith was also chair (until 2015) of the audit committee of Ryder System Inc. (transportation, logistics and supply-chain management). In addition, Ms. Smith is a trustee/ director (since 2000) and a member of the audit committee of the Dimensional Funds complex (128 portfolios).

J. Mikesell
Thomas; 67
c/o UBS AM
One North
Wacker Drive
Chicago,
IL 60606

Trustee

Since 2004

Mr. Thomas is a principal with the investment firm Castle Creek Capital (since 2008) and president and sole shareholder of Mikesell Advisory Corp. (since 2009.) He is the former president and CEO of Federal Home Loan Bank of Chicago (from 2004 to 2008) and of First Chicago Bancorp (from 2008 to 2011).

Mr. Thomas is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Mr. Thomas is a director (since 1992) and chairman of the audit committee for Northshore University Health System, a not-for-profit healthcare organization, and a director and member (since 2016) of the audit committee of four indirect subsidiaries of Tokio Marine Holdings, Inc., a publicly traded insurance company headquartered in Tokyo, Japan: HCC Life Insurance Co., U.S. Specialty Insurance Co., Houston Casualty Co., and Producers Agriculture Insurance Co. Mr. Thomas was previously a director (2012-2015), a member of the audit committee (2012-2015) and chairman of the investment and finance committees (2014-2015) of HCC Insurance Holdings Inc.; and a director of First Chicago Bancorp (from 2008 to 2010) and First Chicago Bank & Trust (from 2008 to 2010).

¹ Each Trustee holds office for an indefinite term.

² Mr. Murphy is the president and owner of Murphy Capital Management Inc. ("Murphy Capital"), an investment advisory firm. Murphy Capital serves as an investment manager through certain wrap fee investment advisory programs sponsored by UBS Financial Services, Inc., an affiliate of UBS AM (Americas). Murphy Capital is paid management fees for the clients it advises through these wrap fee programs.

Officers

Name,
address,
and age

Position(s) held
with trust

Term of office¹and length of
time served

Principal occupation(s) during past 5 years

Rose Ann Bubloski*
Age: 50

Vice President and Assistant Treasurer

Since 2011

Ms. Bubloski is a director (since 2012) (prior to which she was an associate director (from 2008 to 2012)) and senior manager of product control and investment support (previously named registered fund product control) of UBS Asset Management (Americas) Inc. and/or UBS Asset Management (US) Inc. ("UBS AM—Americas region"). Ms. Bubloski is vice president and assistant treasurer of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Franklin P. Dickson*
Age: 40

Vice President

Since December 2017

Mr. Dickson is an associate director (since 2015) and tax compliance manager (since October 2017) (prior to which he was a product controller (from 2015 to 2017) of product control and investment support (previously named registered fund product control of UBS AM—Americas region). From 2013 through 2015, Mr. Dickson was fund administration and compliance manager for U.S. Bancorp Fund Services, LLC, and from April 2008 through June 2013, Mr. Dickson was vice president, client service manager at BNY Mellon Asset Servicing. Mr. Dickson is a vice president of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Mark F. Kemper***
Age: 60

Vice President and Secretary

Since 1999

Mr. Kemper is a managing director and general counsel of UBS AM—Americas region (since 2006 and 2004, respectively). He has been secretary of UBS AM—Americas region (since 2004) and assistant secretary of UBS Asset Management Trust Company (since 1993). Mr. Kemper is vice president and secretary of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager. Mr. Kemper is employed by UBS Business Solutions US LLC (since January 2017).

Joanne M. Kilkeary*
Age: 50

Vice President, Treasurer and Principal Accounting Officer

Since 2006 and 2017 respectively

Ms. Kilkeary is an executive director (since 2013) (prior to which she was a director (from 2008 to 2013)) and head of regulatory, tax, audit and board governance for product control and investment support (since October 2017) (prior to which she was a senior manager of registered fund product control of UBS AM—Americas region (from 2004-2017)). Ms. Kilkeary is a vice president and treasurer and principal accounting officer of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Igor Lasun*
Age: 39

President

Since September 2018

Mr. Lasun is an executive director and head of product development and management for UBS AM—Americas region (since September 2018) (prior to which he was a senior fixed income product specialist from 2007 to September 2018, and had joined the firm in 2005). In this role, he oversees product development and management for both wholesale and institutional businesses. Mr. Lasun serves as president of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Name,
address,
and age

Position(s) held
with trust

Term of office¹and length of
time served

Principal occupation(s) during past 5 years

William Lawlor***
Age: 31

Vice President and Assistant Secretary

Since June 2018

Mr. Lawlor is a director and associate general counsel with UBS Business Solutions US LLC (since January 2017) and also with UBS AM—Americas region (since 2013). Prior to joining UBS AM-Americas region, Mr. Lawlor attended Kent College of Law, where he graduated in 2013. Mr. Lawlor is a vice president and assistant secretary of 10 investment companies (consisting of 64 portfolios) for which UBS AM services as investment advisor or manager.

Nancy D. Osborn*
Age: 52

Vice President and Assistant Treasurer

Since 2007

Mrs. Osborn is a director (since 2010) (prior to which she was an associate director) and a senior manager of product control and investment support (previously named registered fund product control) of UBS AM—Americas region (since 2006). Mrs. Osborn is a vice president and assistant treasurer of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Frank S. Pluchino**
Age: 59

Chief Compliance Officer

Since March 2018

Mr. Pluchino is an executive director with UBS AM—Americas region and is also the chief compliance officer of UBS Hedge Fund Solutions LLC (since 2010). Mr. Pluchino serves as chief compliance officer of 15 investment companies (consisting of 69 portfolios) for which UBS AM or one of its affiliates serves as investment advisor or manager.

Eric Sanders*
Age: 53

Vice President and Assistant Secretary

Since 2005

Mr. Sanders is a director and associate general counsel with UBS Business Solutions US LLC (since January 2017) and also with UBS AM—Americas region (since 2005). Mr. Sanders is a vice president and assistant secretary of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Philip Stacey***
Age: 33

Vice President and Assistant Secretary

Since June 2018

Mr. Stacey is a director and associate general counsel with UBS Business Solutions US LLC (since January 2017) and also with UBS AM—Americas region since 2015. Prior to joining UBS AM—Americas region Mr. Stacey was a legal associate with the Chicago-based investment manager of HFR Asset Management, LLC from 2009 through January 2015. Mr. Stacey is a vice-president and assistant secretary of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Keith A. Weller*
Age: 57

Vice President and Assistant Secretary

Since 2004

Mr. Weller is an executive director and senior associate general counsel with UBS Business Solutions US LLC (since January 2017) and also with UBS AM—Americas region (since 2005) and has been an attorney with affiliated entities since 1995. Mr. Weller is a vice president and assistant secretary of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

† Officers of the Trust are appointed by the Trustees and serve at the pleasure of the Board.

* This person's business address is 1285 Avenue of the Americas, New York, NY 10019-6028.

** This person's business address is 787 Seventh Avenue, New York, NY 10019.

*** This person's business address is One North Wacker Drive, Chicago, IL 60606.

Information about Independent trustee ownership of securities issued by UBS AM (Americas) or UBS AM (US) or any company controlling, controlled by or under common control with UBS AM (Americas) or UBS AM (US)

As of December 31, 2017, the Independent Trustees did not own any securities issued by UBS AM (Americas) or UBS AM (US) or any company controlling, controlled by or under common control with UBS AM (Americas) or UBS AM (US).

Information about trustee ownership of Fund shares

Trustee	Dollar range of equity securities in the Funds¹		Aggregate dollar range of equity securities in all registered investment companies overseen by trustee for which UBS AM or an affiliate serves as Investment advisor, sub-advisor or manager¹
*Independent Trustees*
Adela Cepeda		None	$10,001 – $50,000
John J. Murphy		None	None
Frank K. Reilly		None	Over $100,000
Abbie J. Smith		None	Over $100,000
J. Mikesell Thomas		None	None

¹ Information regarding ownership is as of December 31, 2017. The Funds have not yet commenced operations as of the date of this SAI.

Note regarding ranges: In disclosing the dollar range of equity securities beneficially owned by a Trustee in these columns, the following ranges will be used: (i) none; (ii) $1 - $10,000; (iii) $10,001 - $50,000; (iv) $50,001 - $100,000; or (v) over $100,000.

Compensation table

Trustees

Name and position held	Annual aggregate compensation from the trust¹		Pension or retirement benefits accrued as part of fund expenses		Total compensation from the trust and fund complex paid to trustees²
Adela Cepeda	$	82,958		N/A	$	167,500
John J. Murphy		79,244		N/A		160,000
Frank K. Reilly		89,149		N/A		180,000
Abbie J. Smith		79,244		N/A		160,000
J. Mikesell Thomas		86,673		N/A		175,000

¹ Represents aggregate annual compensation paid by the Trust to each Trustee indicated for the fiscal year ended June 30, 2018.

² This amount represents the aggregate amount of compensation paid to the Trustees for service on the Board of Trustees of three registered investment companies managed by UBS AM (Americas) or an affiliate for the fiscal year ended June 30, 2018.

No officer or Trustee of the Trust who is also an officer or employee of the Advisor receives any compensation from the Trust for services to the Trust.

Each Independent Trustee receives for his or her service to the Fund complex (which consists of the Trust and three other registered investment companies), an annual retainer of $160,000 paid quarterly for serving as a Board member. In addition, the chairman of the Board, for serving as chairman of the Board; the chairman of the Audit Committee, for serving as chairman of the Audit Committee; and the chairman of the Nominating, Compensation and Governance Committee, for serving as chairman of the Nominating, Compensation and Governance Committee, each receive from the Fund complex, for his or her service, an annual retainer of $20,000, $15,000 and $7,500, respectively. The Fund complex also reimburses each Trustee for out-of-pocket expenses in connection with travel and attendance at Board meetings.

Principal holders of securities

As of the date of this SAI, the Funds have not yet commenced operations.

Any person who owns beneficially, either directly or through one or more controlled companies, more than 25% of the voting securities of a Trust is presumed to control the Trust under the provisions of the Act. Note that a controlling person possesses the ability to control the outcome of matters submitted for shareholder vote of a Trust or a particular Fund.

Investment advisory, principal underwriting and other service arrangements

Advisor

UBS Asset Management (Americas) Inc., with its principal offices located at One North Wacker Drive, Chicago, IL 60606 and at 1285 Avenue of the Americas, New York, NY 10019, manages the assets of the Trust pursuant to its investment advisory agreement with each Fund (the "Agreements"). The Advisor is an investment management firm managing approximately $171 billion, as of June 30, 2018. The Advisor is an indirect asset management subsidiary of UBS Group AG and a member of the UBS Asset Management Division, which had approximately $817 billion in assets under management as of June 30, 2018. The Advisor is also an affiliate of UBS Financial Services Inc., which provides certain sub-transfer agency and administration services to the Fund.

Pursuant to its Agreements with the Trust, on behalf of each Fund, the Advisor receives from the Fund a monthly fee at an annual rate (as described in the Prospectus and below) multiplied by the average daily net assets of the Fund for providing investment advisory services. The Advisor is responsible for paying its expenses. The Fund pays the following expenses: (1) the fees and expenses of the Trust's Trustees who are not interested persons (as defined in the Act) of the Trust by reason of affiliation with UBS AM (Americas) or any of UBS AM (Americas)'s affiliates; (2) the salaries and expenses of any of the Trust's officers or employees who are not affiliated with the Advisor; (3) interest expenses; (4) taxes and governmental fees; (5) brokerage commissions and other expenses incurred in acquiring or disposing of portfolio securities; (6) the expenses of registering and qualifying shares for sale with the SEC and with various state securities commissions; (7) auditing and legal costs; (8) insurance premiums; (9) fees and expenses of the Trust's custodian, administrator and transfer agent and any related services; (10) expenses of obtaining quotations of the Fund's portfolio securities and of pricing the Fund's shares; (11) expenses of maintaining the Trust's legal existence and of shareholders' meetings; (12) expenses of preparation and distribution to existing shareholders of reports, proxies and prospectuses; and (13) fees and expenses of membership in industry organizations.

Under the Agreements, the Advisor is entitled to a monthly fee of the respective Fund's average daily net assets equal to annual rates as set forth below:

	Advisory fee breakpoint schedule
Fund	Assets under management	Fee
UBS Engage For Impact Fund	All		0.750	%
UBS Sustainable Development Bank Bond Fund	$0 – $250 million On the next $250 million – $500 million On the next $500 million – $750 million On the next $750 million – $1 billion Above $1 billion		0.150 0.145 0.140 0.135 0.130	%

Each Fund is subject to a contractual expense limit at the following rates of the respective Fund's average daily net assets, excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses:

Fund	Class A			Class P
UBS Engage For Impact Fund		1.10	%		0.85	%
UBS Sustainable Development Bank Bond Fund		0.35	%		0.25	%

The contractual fee waiver and/or expense reimbursement agreement will remain in place through the period ending October 29, 2019. Prior to its expiration, it is expected that the expense limit for each Fund will be reviewed, at which time the continuation of the expense limit will be considered by the Advisor and the Board. The contractual fee waiver and/or expense reimbursement agreement also provides that the Advisor is entitled to reimbursement of fees it waived and/or expenses it reimbursed to the extent such reimbursement can be made during the three fiscal years following the date on which such fee waivers and expense reimbursements were made, provided that the reimbursement by the Fund of the Advisor will not cause the total operating expense ratio to exceed the lesser of the contractual limit as may be in effect for that Fund (i) at the time of the waiver or reimbursement; or (ii) at the time of the recoupment.

General expenses of the Trust (such as costs of maintaining corporate existence, legal fees, insurance, etc.) will be allocated to the series of the Trust in proportion to its relative net assets. Expenses that relate exclusively to the series of the Trust, such as certain registration fees, brokerage commissions and other portfolio expenses, will be borne directly by the series of the Trust.

Portfolio managers

Presented below is information about those individuals identified as portfolio managers of the Funds in the Funds' Prospectus.

The following table provides information relating to other accounts managed by the portfolio managers as of June 30, 2018:

	Registered investment companies				Other pooled investment vehicles				Other accounts
Portfolio manager	Number		Assets managed (in millions)		Number		Assets managed (in millions)		Number		Assets managed (in millions)
Bruno Bertocci (UBS Engage For Impact Fund)		3	$	203		10	$	2,714		2,094	$	3,334
Joseph Elegante (UBS Engage For Impact Fund)		2		132		10		2,714		2,094		3,334
Matthias Dettwiler (UBS Sustainable Development Bank Bond Fund)		0		0		24		11,549		10		9,883

The portfolio management team's management of a Fund and other accounts could result in potential conflicts of interest if the Fund and other accounts have different objectives, benchmarks and fees because the portfolio management team must allocate its time and investment expertise across multiple accounts, including the Fund. A portfolio manager and his or her team manage a Fund and other accounts utilizing a model portfolio approach that groups similar accounts within a model portfolio. The portfolio management team manages accounts according to the appropriate model portfolio, including where possible, those accounts that have specific investment restrictions. Accordingly, portfolio holdings, position sizes and industry and sector exposures tend to be similar across accounts, which may minimize the potential for conflicts of interest.

If a portfolio manager identifies a limited investment opportunity that may be suitable for more than one account or model portfolio, the Fund may not be able to take full advantage of that opportunity due to an allocation of filled purchase or sale orders across all eligible model portfolios and accounts. To deal with these situations, the Advisor has adopted procedures for allocating portfolio trades across multiple accounts to provide fair treatment to all accounts.

The management of personal accounts by a portfolio manager may also give rise to potential conflicts of interest. The Advisor and the Trust have adopted Codes of Ethics that govern such personal trading but there is no assurance that the Codes will adequately address all such conflicts.

UBS AM's compensation and benefits programs are designed to provide its investment professionals with incentives to excel, and to promote an entrepreneurial, performance-oriented culture with clear accountability. They also align the interests of investment professionals with those of our clients and other stakeholders.

In general, the total compensation received by the portfolio managers and analysts at UBS Asset Management consists of two elements: a fixed component (base salary and benefits) and an annual discretionary performance award that is correlated with investment performance.

Fixed component (base salary and benefits):

• Set with the aim of being competitive in the industry and monitored and adjusted periodically with reference to the relevant local labor market in order to remain so.

• The fixed component is used to recognize the experience, skills and knowledge that each portfolio manager or analyst brings to their role.

Performance award:

• Determined annually on a discretionary basis.

• Based on the individual's financial and non-financial contribution—as assessed through a rigorous performance assessment process—as well as on the performance of their respective function, of UBS Asset Management and of UBS as a whole.

• Delivered in cash and, when total compensation is over a defined threshold, partly in deferral vehicles.

• For awards subject to deferral, the deferred amount is calculated using graduated marginal deferral rates, which increase as the value of the performance award increases.

• Deferred amounts are then delivered via two deferral vehicles—75% in the UBS Asset Management Equity Ownership Plan (AM EOP) and 25% in the Deferred Contingent Capital Plan (DCCP):

• AM EOP awards vest over five years with 40% of the award vesting in year two, 40% in year three and 20% in year five, provided the vesting conditions, including continued service, are met and the awards have not been forfeited on or before the vesting dates. Deferred awards under the AM EOP are granted in the form of Notional Funds. The Notional Funds are aligned to selected UBS Asset Management funds. They provide for a high level of transparency and correlation between an employee's compensation and the investment performance of UBS Asset Management. This enhances the alignment of investment professionals' and other employees' interests with those of our clients.

• The DCCP was introduced for performance year 2012 onwards as a key component of UBS's compensation incentives with the capital strength of the firm. Awards under the DCCP vest 100% in year five, subject to vesting conditions, including continued employment, and subject to forfeiture.

The DCCP aligns the interests of our key employees with the interests of external investors and, alongside the AM EOP, ensures an appropriate balance between client and other stakeholder alignment.

For our Equities, Fixed Income, Investment Solutions and Passive investment areas:

From January 1, 2015, UBS Asset Management introduced a new Key Performance Indicator (KPI)-led model for each business area, aligning our business steering logic with our strategic priorities. For our investment areas, sustainable investment performance is a major component of the KPI model.

Portfolio managers' performance awards are subject to detailed KPIs, mainly focused on investment performance of relevant client portfolios and funds, and also including some other factors such as risk management and client focus. Investment performance is assessed annually over rolling one, three and five years against benchmark, performance target and peers. This ensures that the interests of portfolio managers are aligned with those of our clients. In addition, we evaluate our passive strategies in terms of how closely the performance of the strategies tracks their respective benchmarks over time.

For analysts, performance awards are, in general, based on the performance of some combination of model and/or client portfolios, generally evaluated over one and three years. This is coupled with a qualitative assessment of their contribution considering factors such as the quality of their research, stock recommendations and their communication within and between teams and with portfolio managers.

Of all amounts deferred, 75% is granted in the AM EOP. Within the AM EOP, 50% of the Notional Funds amount is allocated to a core balanced fund aligned to a diversified range of internally managed funds. The other 50% is aligned to the most representative fund managed by/contributed to by the investment professional to further align their interests with those of our clients and other stakeholders.

As of October 22, 2018, the portfolio managers identified above owned no shares of the Funds because the Funds have not yet been publicly offered.

Administrative, accounting and custody services

Administrative and accounting services. UBS AM (Americas) also serves as the Funds' administrator. The Administrator is an indirect wholly owned asset management subsidiary of UBS Group AG.

As administrator, UBS AM (Americas) supervises and manages all aspects (other than investment advisory activities) of the Trust's operations. Under the Administration Contract, the Administrator will not be liable for any error of judgment or mistake of law or for any loss suffered by any Fund, the Trust or any of its shareholders in connection with the performance of the Administration Contract, except to the extent that such a loss results from negligence, willful misfeasance, bad faith or gross negligence on the part of the Administrator in the performance of its duties or from reckless disregard of its duties and obligations thereunder. The Administration Contract is terminable at any time without penalty by the Board or by vote of the holders of a majority of the Funds' outstanding voting securities, on 60 days' written notice to the Administrator, or by the Administrator on 60 days' written notice to the Trust. Each Fund pays a fee to the Administrator that is computed daily and paid monthly at an annual rate of 0.075% of average daily net assets of such Fund.

UBS AM (Americas) has entered into a Sub-Administration Contract with State Street Bank and Trust Company ("State Street") to provide accounting, portfolio valuation and certain sub-administrative services for each Fund. UBS AM (Americas) pays State Street for the services it provides under the Sub-Administration Contract.

Custody services. State Street, located at One Lincoln Street, Boston, Massachusetts 02111, provides custodian services for the securities and cash of each Fund and employs foreign sub-custodians in accordance with applicable requirements under the Act to provide custody of each Fund's foreign securities and cash. State Street maintains certain books and records of each Fund that are required by applicable federal regulations.

Principal underwriting arrangements

UBS Asset Management (US) Inc. (the "Underwriter"), with its principal office located at 1285 Avenue of the Americas, New York, New York 10019-6028, acts as the principal underwriter of each class of shares of the Funds pursuant to a Principal Underwriting Contract with the Trust. The Principal Underwriting Contract requires the Underwriter to use its best efforts, consistent with its other businesses, to sell shares of the Funds. Shares of the Funds are offered continuously. The Underwriter may enter into dealer agreements with other broker-dealers (affiliated and non-affiliated) and with other financial institutions to authorize them to sell Fund shares.

Under a plan pertaining to the Class A shares of the Funds adopted by the Trust in the manner prescribed under Rule 12b-1 under the Act (the "Plan"), the Funds pay the Underwriter a service fee, accrued daily and payable monthly, at the annual rates of 0.25% and 0.10% of the average daily net assets of each class of shares for the UBS Engage For Impact Fund and the UBS Sustainable Development Bank Bond Fund, respectively. There is no distribution/service plan with respect to the Fund's Class P shares, and the Funds pay no service or distribution fees with respect to their Class P shares.

The Underwriter uses the service fees under the Plan primarily to pay dealers for shareholder servicing, currently at the annual rates of 0.25% and 0.10% of the aggregate investment amounts maintained in the UBS Engage For Impact Fund and UBS Sustainable Development Bank Bond Fund, respectively, by each dealer. Each dealer then compensates its investment professionals for shareholder servicing that they perform and offsets its own expenses in servicing and maintaining shareholder accounts including related overhead expenses.

The Underwriter receives the proceeds of the initial sales charge paid when Class A shares are bought and of the contingent deferred sales charge paid upon sales of shares. These proceeds also may be used to cover distribution expenses.

UBS AM (US) may also make cash and non-cash payments to banks, broker-dealers, insurance companies, financial planning firms and other financial intermediaries (collectively, "Financial Intermediaries"), that sell shares of the Funds, subject to UBS AM (US)'s internal policies and procedures. The source of such payments may come from sales charges on such shares, 12b-1 fees collected from the Funds and/or from the underwriter's own resources (including through transfers from affiliates). Payments made out of the underwriter's own resources are often referred to as "revenue sharing." UBS AM (US) provides Financial Intermediaries with sales literature and advertising materials relating to the registered investment companies advised by UBS AM (US). UBS AM (US) also shares expenses with Financial Intermediaries for costs incurred in hosting seminars for employees and clients of Financial Intermediaries, subject to UBS AM (US)'s internal policies and procedures governing payments for such seminars. These seminars may take place at UBS AM (US)'s headquarters or other appropriate locations and may include reimbursement of travel expenses (i.e., transportation, lodging and meals) of employees of Financial Intermediaries in connection with training and education seminars. Subject to UBS AM (US)'s internal policies and procedures, UBS AM (US) may provide any or all of the following to employees of Financial Intermediaries and their guest(s): (i) an occasional meal, a sporting event or theater ticket or other comparable entertainment; (ii) gifts of less than $100 per person per year; and/or (iii) UBS AM (US)'s promotional items of nominal value (golf balls, shirts, etc.).

In addition, Financial Intermediaries may maintain omnibus accounts and/or have similar arrangements with UBS AM (US) and may be paid by UBS AM (US) for providing sub-transfer agency and other services. Financial Intermediaries may be paid a sub-transfer agency or related fee out of Fund assets similar to which that the Fund otherwise would have paid the Fund's transfer agent. In addition, the Financial Intermediary, for the services provided, may charge a higher fee than would be represented by the sub-transfer agency or related fee. To the extent 12b-1 fees and sub-transfer agency or related fees do not meet the charge, the underwriter or an affiliate will pay the difference out of its own resources. Such payments are often referred to as "revenue sharing." Such expenses, to the extent they are Fund expenses, are included in the annual operating expenses set forth in the Fund's prospectus.

You should ask your Financial Intermediary about any payment it receives from the underwriter and any services provided.

The Plan and the Principal Underwriting Contract specify that the Funds must pay service and distribution fees to the Underwriter as compensation for its service and distribution related activities, not as reimbursement for specific expenses incurred. Therefore, even if the Underwriter's expenses for the Funds exceed the service or distribution fees it receives, the Funds will not be obligated to pay more than those fees. On the other hand, if the Underwriter's expenses are less than such fees, it will retain its full fees and realize a profit. Expenses in excess of service and distribution fees received or accrued through the termination date of any Plan will be the Underwriter's sole responsibility and not that of the Fund. Annually, the Board reviews the Plan and the Underwriter's corresponding expenses for each class of shares of the Fund separately from the Plan and expenses of the other classes of shares.

Among other things, the Plan provides that (1) the Underwriter will submit to the Board at least quarterly, and the Board members will review, reports regarding all amounts expended under the Plan and the purposes for which such expenditures were made, (2) the Plan will continue in effect only so long as it is approved at least annually, and any material amendment thereto is approved, by the Board, including those Board members who are not "interested persons" of the Trust and who have no direct or indirect financial interest in the operation of the Plan or any agreement related to the Plan, acting in person at a meeting called for that purpose, (3) payments by a Fund under the Plan shall not be materially increased without the approval by a majority of the outstanding voting securities of the relevant class of the Fund, and (4) while the Plan remains in effect, the selection and nomination of Board members who are not "interested persons" of the Trust shall be committed to the discretion of the Board members who are not "interested persons" of the Trust.

In reporting amounts expended under the Plan to the Board members, the Underwriter allocates expenses attributable to the sale of each class of the Funds' shares to such class based on the ratio of sales of shares of such class to the sales of both classes of shares. The fees paid by one class of a Fund's shares will not be used to subsidize the sale of any other class of the Fund's shares.

In approving the Plan, the Board considered all of the features of the distribution system and the anticipated benefits to the Funds and its shareholders. With regard to the Plan, the Board considered (1) the advantages to the shareholders of economies of scale resulting from growth in the Fund's assets and potential continued growth, (2) the services provided to the Fund and its shareholders by the Underwriter, (3) the services provided by dealers pursuant to each dealer agreement with the Underwriter, and (4) the Underwriter shareholder service-related and, where applicable, distribution-related expenses and costs.

With respect to the Plan, the Board considered all compensation that the Underwriter would receive under the Plan and the Principal Underwriting Contract, including service fees and, as applicable, initial sales charges, distribution fees and contingent deferred sales charges. The Board also considered the benefits that would accrue to the Underwriter under the Plan, in that the Underwriter would receive service, distribution, advisory and administrative fees that are calculated based upon a percentage of the average net assets of the Fund, which fees would increase if the Plan was successful and the Fund attained and maintained significant asset levels.

Transfer agency services

BNY Mellon Investing Servicing (US) Inc. ("BNY Mellon"), a subsidiary of BNY Mellon Bank, N.A. serves as the Trust's transfer and dividend disbursing agent. It is located at 760 Moore Road, King of Prussia, Pennsylvania 19406.

Independent registered public accounting firm

Ernst & Young LLP, 5 Times Square, New York, New York 10036, is the independent registered public accounting firm of the Trust.

Legal counsel

Stradley Ronon Stevens & Young, LLP, Philadelphia, Pennsylvania, is legal counsel to the Trust and the Independent Trustees.

Personal trading policies

The Trust, the Advisor and the Underwriter have adopted a Code of Ethics. The Code of Ethics establishes standards by which employees of UBS Asset Management (including all employees of the Advisor and Underwriter) (together, "Covered Persons") must abide when engaging in personal securities trading conduct.

Under the Code of Ethics, Covered Persons are prohibited from, among other things: (i) executing a securities transaction on a day during which the Fund has a pending or executed buy or sell in the same security; (ii) entering into a net short position with respect to any security; (iii) purchasing or selling futures (except currency forwards) that are not traded on an exchange, as well as options on any type of futures (exchange-traded or not); (iv) purchasing securities issued by a supplier or vendor about which the Covered Person has information or with whom the Covered Person is directly involved in negotiating a contract; and (v) acquiring securities in an initial public offering (other than a new offering of a registered open-end investment company).

In addition, Covered Persons must obtain prior written approval before purchasing, selling or transferring any security subject to certain exceptions listed in the Code of Ethics. Covered Persons and Trustees are required to file the following reports: (1) an initial holdings report disclosing all securities owned by the Covered Person and any securities accounts maintained by the Covered Person, which must be filed within ten days of becoming a Covered Person and gaining access to UBS AM systems (Independent Trustees are not required to file this report); (2) quarterly reports of security investment transactions and new securities accounts. Independent Trustees need only report a transaction in a security if such Trustee, at the time of the transaction, knew or should have known, in the ordinary course of fulfilling his official duties as a Trustee, that, during the 15-day period immediately preceding or after the date of the transaction by the Trustee, such security was purchased or sold by the Fund, or was being considered for purchase or sale by the Fund; and (3) an annual certification that they have read and understand the Code of Ethics, that they have complied with its requirements during the preceding year, and that they have disclosed or reported all personal transactions/holdings required to be disclosed or reported.

A copy of the Code of Ethics has been filed with and is available through the SEC.

Proxy voting policies

The Board believes that the voting of proxies on securities held by each Fund is an important element of the overall investment process. As such, the Board has delegated the responsibility to vote such proxies to UBS AM (Americas). Following is a summary of UBS AM (Americas)'s proxy voting policy.

You may obtain information about the Fund's proxy voting decisions for the most recent 12-month period ended June 30, without charge, by calling the Trust toll-free at 1-800-647 1568 or on the EDGAR database on the SEC's Web Site (www.sec.gov).

The proxy voting policy of UBS AM (Americas) is based on its belief that voting rights have economic value and should be treated accordingly. Good corporate governance should in the long term, lead towards better corporate performance and improved shareholder value. Generally, UBS AM (Americas) expects the boards of directors of companies issuing securities held by its clients to act in the service of the shareholders, view themselves as stewards of the company, exercise good judgment and practice diligent oversight of the management of the company. A commitment to acting in as transparent a manner as possible is fundamental to good governance. While there is no absolute set of rules that determine appropriate corporate governance under all circumstances and no set of rules will guarantee ethical board behavior, there are certain principles, which provide evidence of good corporate governance. UBS AM (Americas) may delegate to an independent proxy voting and research service the authority to

exercise the voting rights associated with certain client holdings. Any such delegation shall be made with the direction that the votes be exercised in accordance with UBS AM (Americas)'s proxy voting policy.

When UBS AM (Americas)'s view of a company's management is favorable, UBS AM (Americas) generally supports current management initiatives. When UBS AM (Americas)'s view is that changes to the management structure would probably increase shareholder value, UBS AM (Americas) may not support existing management proposals. In general, UBS AM (Americas) generally exercises voting rights in accordance with the following principles: (1) with respect to board structure, (a) an effective chairman is key, (b) the roles of chairman and chief executive generally should be separated, (c) board members should have appropriate and diverse experience and be capable of providing good judgment and diligent oversight of management of the company, (d) the board should include executive and non-executive members, and (e) the non-executive members should provide a challenging, but generally supportive environment; and (2) with respect to board responsibilities, (a) the whole board should be fully involved in endorsing strategy and in all major strategic decisions, and (b) the board should ensure that at all times (i) appropriate management succession plans are in place; (ii) the interests of executives and shareholders are aligned and the financial audit is independent and accurate; (iv) the brand and reputation of the company is protected and enhanced; (v) a constructive dialogue with shareholders is encouraged; and (vi) it receives all the information necessary to hold management accountable. In addition, UBS AM (Americas) focuses on the following areas of concern when voting its clients' securities: economic value resulting from acquisitions or disposals; operational performance; quality of management; independent non-executive board directors not holding executive management accountable; quality of internal controls; lack of transparency; inadequate succession planning; poor approach to corporate social responsibility; inefficient management structure; and corporate activity designed to frustrate the ability of shareholders to hold the board accountable or realize the maximum value of their investment. UBS AM (Americas) exercises its voting rights in accordance with overarching rationales outlined by its proxy voting policies and procedures that are based on the principles described above.

UBS AM (Americas) has implemented procedures designed to address a conflict of interest in voting a particular proxy proposal, which may arise as a result of its or its affiliates' client relationships, marketing efforts or banking, investment banking and broker-dealer activities. To address such conflicts, UBS AM (Americas) has imposed information barriers between it and its affiliates who conduct banking, investment banking and broker-dealer activities and has implemented procedures to prevent business, sales and marketing issues from influencing its proxy votes. Whenever UBS AM (Americas) is aware of a conflict with respect to a particular proxy, the UBS AM Americas Committee is notified and determines the manner in which such proxy is voted.

Portfolio holdings disclosure policies and procedures

Introduction. UBS AM (Americas) and the Board have adopted portfolio holdings disclosure policies and procedures to govern the disclosure of the portfolio holdings of the Funds (the "Disclosure Policy"). The Trust's policy with respect to the release of portfolio holdings information is to only release such information consistent with applicable legal requirements and the fiduciary duties owed to shareholders. Subject to the limited exceptions described below, the Funds' portfolio holdings will not be made available to anyone outside of UBS AM (Americas) unless and until the information has been made available to all shareholders or the general public in a manner consistent with the spirit and terms of the Disclosure Policy. A description of the type and frequency of portfolio holdings that are disclosed to the public is contained in the Funds' Prospectus, as it may be updated from time to time.

The Disclosure Policy requires that the UBS AM (Americas) Legal and Compliance Departments address any material conflicts of interest regarding a disclosure of portfolio holdings and determine whether a disclosure of a Fund's portfolio holdings is for a legitimate business purpose and in the best interest of the Fund's shareholders prior to the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust or an attorney in the UBS AM (Americas) Legal and Compliance Departments authorizing the disclosure of portfolio holdings. The UBS AM (Americas) Legal and Compliance Departments will periodically review how a Fund's portfolio holdings are being disclosed to and

used by, if at all, shareholders, service providers, UBS AM (Americas) affiliates, fiduciaries and broker-dealers, to ensure that such disclosure and use is for legitimate Fund business reasons and consistent with the best interests of the Funds' shareholders.

The Board exercises continuing oversight of the disclosure of Fund portfolio holdings by: (i) overseeing the implementation and enforcement by the CCO of the Disclosure Policy, the Trust's code of ethics and policies and procedures regarding the misuse of inside information; (ii) considering reports and recommendations by the CCO concerning any material compliance matters (as defined in Rule 38a-1 under the Act and Rule 206(4)-7 under the Investment Advisers Act of 1940, as amended ("Advisers Act")) that may arise in connection with any policies governing portfolio holdings; and (iii) considering whether to approve or ratify any amendment to any policies governing portfolio holdings. The Disclosure Policy may be amended from time to time, subject to approval by the Board.

Disclosure of complete portfolio holdings to service providers subject to confidentiality and trading restrictions. UBS AM (Americas), for legitimate fund business purposes, may disclose the Funds' complete portfolio holdings if it deems such disclosure necessary and appropriate to rating and ranking organizations, financial printers, proxy voting service providers, pricing information vendors, derivatives collateral managers, third-parties that deliver analytical, statistical or consulting services, custodians or a redeeming party's custodian or transfer agent, as necessary in connection with redemptions in-kind, and other third parties that provide services (collectively, "Service Providers") to UBS AM (Americas) and/or the Funds.

Disclosure of complete portfolio holdings to a Service Provider is conditioned on the Service Provider being subject to a written duty of confidentiality, including a duty not to trade on the basis of any material non-public information, pursuant to the terms of the service agreement between the Service Provider and the Trust or UBS AM (Americas), or the terms of a separate confidentiality agreement. The frequency with which complete portfolio holdings may be disclosed to a Service Provider, and the length of lag, if any, between the date of information and the date on which the information is disclosed to the Service Provider, is to be determined based on the facts and circumstances, including, without limitation, the nature of the portfolio holdings information to be disclosed, the risk of harm to the Funds' shareholders, and the legitimate fund business purposes served by such disclosure. Disclosure of Fund complete portfolio holdings to a Service Provider must be authorized in writing by the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust or by an attorney in the UBS AM (Americas) Legal and Compliance Departments.

Disclosure of complete portfolio holdings to UBS Asset Management affiliates and certain fiduciaries subject to confidentiality and trading restrictions. The Funds' complete portfolio holdings may be disclosed between and among the following persons (collectively, "Affiliates and Fiduciaries") subject to authorization by the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust, or an attorney in the UBS AM (Americas) Legal and Compliance Departments, for legitimate fund business purposes within the scope of their official duties and responsibilities, and subject to such Affiliate/Fiduciary's continuing duty of confidentiality and duty not to trade on the basis of any material non-public information, as such duties are imposed under the Trust's and/or UBS AM (Americas)'s Code of Ethics, the Funds' policies and procedures regarding the prevention of the misuse of inside information, by agreement or under applicable laws, rules and regulations: (i) persons who are subject to UBS AM (Americas)'s Codes of Ethics or the policies and procedures regarding the prevention of the misuse of inside information; (ii) an investment advisor, distributor, administrator, sub-administrator, transfer agent, custodian or securities lending agent to the Funds; (iii) an accounting firm, an auditing firm or outside legal counsel retained by UBS AM (Americas) or the Funds; (iv) an investment advisor to whom complete portfolio holdings are disclosed for due diligence purposes when the advisor is in merger or acquisition talks with the Funds' current advisor; and (v) a newly hired investment advisor or sub-advisor to whom complete portfolio holdings are disclosed prior to the time it commences its duties.

The frequency with which complete portfolio holdings may be disclosed between and among Affiliates and Fiduciaries, and the length of the lag, if any, between the date of the information and the date on which the information is disclosed between and among the Affiliates and Fiduciaries, is to be determined by the UBS AM (Americas) Legal and Compliance Departments based on the facts and circumstances, including, without limitation, the nature of the portfolio holdings information to be disclosed, and the risk of harm to a Fund and its shareholders, and the legitimate fund business purposes served by such disclosure.

Arrangements to disclose portfolio holdings to service providers and fiduciaries. As of the date of this SAI, the specific Service Providers and Fiduciaries with whom the Trust has arrangements to provide portfolio holdings in advance of their release to the general public in the course of performing or to enable them to perform services for the Fund are:

• State Street, the Fund's custodian, accounting agent, securities lending agent, and sub-administrator, receives portfolio holdings information daily on a real-time basis in connection with the custodian, fund accounting, securities lending, and sub-administration services it provides to the Fund.

• Ernst & Young LLP, the Fund's independent registered public accounting firm, receives portfolio holdings information on an annual and semiannual basis for financial reporting purposes. There is a 25-day lag between the date of portfolio holdings information and the date on which the information is disclosed to Ernst & Young. Ernst & Young also receives portfolio holdings information annually at year-end for audit purposes. For information received at year-end for audit purposes, there is no lag between the date of the portfolio holdings information and the date on which the information is disclosed to Ernst & Young. In addition, Ernst & Young receives holdings twice a year for PFIC, fiscal income and excise tax provision reporting purposes with a 2-day lag time.

• The Funds use a limited number of financial printers to print and file their annual and semiannual shareholder reports and other regulatory materials. There is at least a three week lag between the date of the portfolio holdings information and the date on which the information is disclosed to the printer.

• The rating agencies of Morningstar and Lipper and the financial news and data companies, Bloomberg L.P. and FactSet Research Systems Inc., receive portfolio holdings information on a quarterly basis so that the Funds may be included in each company's industry reports and other materials. There is a 60-day lag between the date of the portfolio holdings information and the date on which the information is disclosed to these companies.

• Marketing Spectrum and Karen Murray receive portfolio holdings information on a semi-annual basis to provide writing services in connection with the preparation of shareholder reports. There is typically a 15-day lag between the date of the portfolio holdings information and the date on which they receive the information.

Disclosure of complete portfolio holdings to certain shareholders subject to confidentiality and trading restrictions. UBS AM (Americas) may make available a Fund's complete non-public portfolio holdings, as of the most recent month-end, no sooner than 8 business days after the month-end for the purpose of assisting a shareholder to comply with the shareholder's legal or other regulatory obligations. UBS AM (Americas) may release the non-public portfolio holdings to a shareholder of a Fund if: (i) the shareholder requests the non-public portfolio holdings for the purpose of assisting the shareholder in complying with the shareholder's legal or other regulatory obligations; (ii) the disclosure of the non-public portfolio holdings is consistent with the Fund's legitimate business purpose; and (iii) the shareholder (and, if applicable, the shareholder's service provider) executes a written confidentiality agreement whereby the shareholder (and, if applicable, the shareholder's service provider) agrees not to disclose the non-public portfolio holdings information to third parties and not to purchase or sell any portfolio securities listed in the non-public portfolio holdings in reliance on the non-public portfolio holdings information.

Disclosure to a shareholder of a Fund of the non-public portfolio holdings information must be authorized in writing by the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Fund or by an attorney in the UBS AM (Americas) Legal and Compliance Departments.

As of the date of this SAI, the Trust, on behalf of the Funds, had no arrangements with shareholders to provide portfolio holdings in advance of their release to the general public to assist shareholders in complying with the shareholders' legal or regulatory obligations.

Disclosure of portfolio holdings to broker-dealers in the normal course of managing Fund assets. An investment advisor, administrator or custodian for the Funds may, for legitimate fund business purposes within the scope of their official duties and responsibilities, disclose portfolio holdings (whether partial portfolio holdings or complete portfolio holdings) and other investment positions comprising a Fund to one or more broker-dealers during the course of, or in connection with, normal day-to-day securities and derivatives transactions with or through such broker-dealers subject to the broker-dealer's legal obligation not to use or disclose material non-public information concerning a Fund's portfolio holdings, other investment positions, securities transactions or derivatives transactions without the consent of the Trust or the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust or an attorney in the UBS AM (Americas) Legal and Compliance Departments. The Trust has not given its consent to any such use or disclosure and no person including the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust or an attorney in the UBS AM (Americas) Legal and Compliance Departments is authorized to give such consent except as approved by the Board. In the event consent is given to disclose portfolio holdings to a broker-dealer, the frequency with which the portfolio holdings may be disclosed to a broker-dealer, and the length of the lag, if any, between the date of the information and the date on which the information is disclosed to the broker-dealer, is to be determined based on the facts and circumstances, including, without limitation, the nature of the portfolio holdings information to be disclosed, and the risk of harm to a Fund and its shareholders, and the legitimate fund business purposes served by such disclosure.

Disclosure of non-material information. Policies and procedures regarding disclosure of non-material information permit the officers of the Trust, UBS Asset Management Funds portfolio managers and senior officers of UBS AM (Americas) Product Control and Investment Support, UBS AM (Americas) Legal and Compliance Departments, and anyone employed by or associated with UBS AM (Americas) who has been authorized by the UBS AM (Americas) Legal Department (collectively, "Approved Representatives") to disclose any views, opinions, judgments, advice or commentary, or any analytical, statistical, performance or other information, in connection with or relating to the Funds or its portfolio holdings and/or other investment positions (collectively, commentary and analysis) or any changes in the portfolio holdings of a Fund that occurred after the most recent calendar-quarter end (recent portfolio changes) to any person if such information does not constitute material non-public information.

An Approved Representative must make a good faith determination whether the information constitutes material non-public information, which involves an assessment of the particular facts and circumstances. UBS AM (Americas) believes that in most cases recent portfolio changes that involve a few or even several securities in a diversified portfolio or commentary and analysis would be immaterial and would not convey any advantage to a recipient in making an investment decision concerning a Fund. Nonexclusive examples of commentary and analysis include: (i) the allocation of the Fund's portfolio holdings and other investment positions among various asset classes, sectors, industries and countries; (ii) the characteristics of the stock and bond components of the Fund's portfolio holdings and other investment positions; (iii) the attribution of Fund returns by asset class, sector, industry and country; and (iv) the volatility characteristics of the Fund. An Approved Representative may in his or her sole discretion determine whether to deny any request for information made by any person, and may do so for any reason or no reason.

Disclosure of portfolio holdings as required by applicable law. Fund portfolio holdings and other investment positions comprising a Fund may be disclosed to any person as required by applicable laws, rules and regulations. Examples of such required disclosure include, but are not limited to, disclosure of Fund portfolio holdings: (i) in a

filing or submission with the SEC or another regulatory body; (ii) in connection with seeking recovery on defaulted bonds in a federal bankruptcy case; (iii) in connection with a lawsuit; or (iv) as required by court order, subpoena or similar process (e.g., arbitration proceedings).

Prohibitions on disclosure of portfolio holdings. No person is authorized to disclose Fund portfolio holdings or other investment positions (whether online at www.ubs.com, in writing, by fax, by e-mail, orally or by other means) except in accordance with the Disclosure Policy. In addition, no person is authorized to make disclosure pursuant to the Disclosure Policy if such disclosure would be unlawful under the antifraud provisions of the federal securities laws (as defined in Rule 38a-1 under the Act). Furthermore, UBS AM (Americas), in its sole discretion, may determine not to disclose portfolio holdings or other investment positions comprising a Fund to any person who might otherwise be eligible to receive such information under the Disclosure Policy, or may determine to make such disclosures publicly as described above.

Prohibitions on receipt of compensation or other consideration. Neither UBS AM (Americas), the Funds nor any other person may pay or receive any compensation or other consideration of any type for the purpose of obtaining disclosure of Fund portfolio holdings or other investment positions. "Consideration" includes any agreement to maintain assets in the Funds or in other investment companies or accounts managed by the investment advisor or by any affiliated person of the investment advisor.

Bank line of credit

The Funds participate with other funds managed by UBS AM in a $125 million committed credit facility (the "Credit Facility") with State Street, to be utilized for temporary financing until the settlement of sales or purchases of portfolio securities, the repurchase or redemption of shares at the request of shareholders and other temporary or emergency purposes. Under the Credit Facility arrangement, the Funds have agreed to pay commitment fees on the average daily balance of the Credit Facility not utilized. Under the Credit Facility arrangement, commitment fees are allocated amongst the participating funds as follows: 50% of the allocation is based on the relative asset size of the funds and the other 50% of the allocation is based on utilization. During the fiscal period ended June 30, 2018, the Funds were not operational and did not utilize the Credit Facility.

Portfolio transactions and brokerage commissions

The Advisor is responsible for decisions to buy and sell securities for the Funds and for the placement of the Funds' portfolio business and the negotiation of commissions, if any, paid on such transactions. Fixed income securities in which the Funds invest are traded in the OTC market. These securities are generally traded on a net basis with dealers acting as principal for their own accounts without a stated commission, although the bid/ask spread quoted on securities includes an implicit profit to the dealers. In OTC transactions, orders are placed directly with a principal market-maker unless a better price and execution can be obtained by using a broker. Brokerage commissions are paid on transactions in listed securities, futures contracts and options. The Advisor is responsible for effecting portfolio transactions and will do so in a manner deemed fair and reasonable to the Funds. Under its advisory agreements with the Funds, the Advisor is authorized to utilize the trading desk of its foreign affiliates to execute foreign securities transactions, but monitors the selection by such affiliates of brokers and dealers used to execute transactions for the Funds.

which the Advisor exercises investment discretion. In selecting and monitoring broker-dealers and negotiating commissions, the Advisor considers the firm's reliability, the quality of its execution services on a continuing basis and its financial condition. When more than one firm is believed to meet these criteria, preference may be given to brokers who provide research or statistical material or other services to the Funds or the Advisor. Such services include advice, both directly and in writing, as to the value of the securities; the advisability of investing in, purchasing or selling securities; and the availability of securities, or purchasers or sellers of securities, as well as analyses and reports concerning issues, industries, securities, economic factors and trends, portfolio strategy and the performance of accounts. This allows the Advisor to supplement its own investment research activities and obtain the views and information of others prior to making investment decisions. The Advisor is of the opinion that, because this material must be analyzed and reviewed by its staff, the receipt and use of such material does not tend to reduce expenses but may benefit the Funds by supplementing the Advisor's research.

The Advisor effects portfolio transactions for other investment companies and advisory accounts. Research services furnished by dealers through whom the Funds effect their securities transactions may be used by the Advisor, or its affiliated investment advisors, in servicing all of their accounts; not all such services may be used in connection with the Funds. In the opinion of the Advisor, it is not possible to measure separately the benefits from research services to each of the accounts (including the Funds). The Advisor will attempt to equitably allocate portfolio transactions among the Funds and others whenever concurrent decisions are made to purchase or sell securities by the Funds and another account. In making such allocations between the Funds and others, the main factors to be considered are the respective investment objectives, the relative size of portfolio holdings of the same or comparable securities, the availability of cash for investment, the size of investment commitments generally held and the opinions of the persons responsible for recommending investments to the Funds and the others. In some cases, this procedure could have an adverse effect on the Funds. In the opinion of the Advisor, however, the results of such procedures will, on the whole, be in the best interest of each of the clients.

When buying or selling securities, the Funds may pay commissions to brokers who are affiliated with the Advisor or the Funds. The Funds may purchase securities in certain underwritten offerings for which an affiliate of the Funds or the Advisor may act as an underwriter. The Funds may effect futures transactions through, and pay commissions to, FCMs who are affiliated with the Advisor or the Funds in accordance with procedures adopted by the Board.

Certain series of the Trust maintain a commission recapture program with certain brokers for such series. Under the program, a percentage of commissions generated by portfolio transactions for the fund is rebated to the fund by the brokers.

Portfolio turnover

The Funds are free to dispose of their portfolio securities at any time, subject to complying with the Code and the Act, when changes in circumstances or conditions make such a move desirable in light of each Fund's investment objective. The Funds will not attempt to achieve or be limited to a predetermined rate of portfolio turnover, such a turnover always being incidental to transactions undertaken with a view to achieving that Fund's investment objective.

The Funds do not intend to use short-term trading as a primary means of achieving their investment objectives. The rate of portfolio turnover shall be calculated by dividing (a) the lesser of purchases and sales of portfolio securities for the particular fiscal year by (b) the monthly average of the value of the portfolio securities owned by that Fund during the particular fiscal year. Such monthly average shall be calculated by totaling the values of the portfolio securities as of the beginning and end of the first month of the particular fiscal year and as of the end of each of the succeeding eleven months and dividing the sum by 13.

Under normal circumstances, the portfolio for the UBS Engage For Impact Fund is not expected to exceed 100%. The portfolio turnover rate for the UBS Sustainable Development Bank Bond Fund may exceed 100%. High

portfolio turnover rates (over 100%) may involve correspondingly greater brokerage commissions and other transaction costs, which will be borne directly by the Funds and ultimately by the Fund's shareholders. In addition, high portfolio turnover may result in increased short-term capital gains, which, when distributed to shareholders, are treated as ordinary income.

Shares of beneficial interest

The UBS Engage For Impact Fund currently offers two classes of shares: the UBS Fund—Class A (the Class A shares), UBS Fund—Class P (the Class P shares). The UBS Sustainable Development Bank Bond Fund currently offers three classes of shares: the UBS Fund—Class A (the Class A shares), UBS Fund—Class P (the Class P shares) and UBS Fund—Class P2 (the Class P2 shares). Class P2 shares are included in a separate SAI.

Each Fund is authorized to issue an unlimited number of shares of beneficial interest with a $0.001 par value per share. Each share of beneficial interest represents an equal proportionate interest in the assets and liabilities of the applicable Fund and has identical voting, dividend, redemption, liquidation and other rights and preferences as the other classes of that Fund, except that only the Class A shares may vote on any matter affecting the Plan. No class may vote on matters that affect only another class. Under Delaware law, the Trust does not normally hold annual meetings of shareholders. Shareholders' meetings may be held from time to time to consider certain matters, including changes to a Fund's fundamental investment objective and fundamental investment policies, changes to the Trust's investment advisory agreements and the election of Trustees when required by the Act. When matters are submitted to shareholders for a vote, shareholders are entitled to one vote per share with proportionate voting for fractional shares. The shares of the Funds do not have cumulative voting rights or any preemptive or conversion rights, and the Trustees have authority, from time to time, to divide or combine the shares of the Funds into a greater or lesser number of shares so affected. In the case of a liquidation of a Fund, each shareholder of the Fund will be entitled to share, based upon the shareholder's percentage share ownership, in the distribution of assets, net of liabilities, of the Fund. No shareholder is liable for further calls or assessment by a Fund.

On any matters affecting only one series of the Trust or class, only the shareholders of that series of the Trust or class are entitled to vote. On matters relating to the Trust but affecting the series of the Trust differently, separate votes by the affected series or classes are required. With respect to the submission to shareholder vote of a matter requiring separate voting by a series or class, the matter shall have been effectively acted upon with respect to any series or class if a majority of the outstanding voting securities of that series or class votes for the approval of the matter, notwithstanding that: (1) the matter has not been approved by a majority of the outstanding voting securities of any other series or class; and (2) the matter has not been approved by a majority of the outstanding voting securities of the Trust.

The Trustees of the Trust do not intend to hold annual meetings of shareholders of the Funds. The SEC, however, requires the Trustees to promptly call a meeting for the purpose of voting upon the question of removal of any Trustee when requested to do so by not less than 10% of the outstanding shareholders of the respective Funds. In addition, subject to certain conditions, shareholders of each Fund may apply to the Fund to communicate with other shareholders to request a shareholders' meeting to vote upon the removal of a Trustee or Trustees.

Reduced sales charges, additional purchase, exchange and redemption information and other services

Sales charge reductions and waivers

Waivers of sales charges—Class A shares (UBS Engage For Impact Fund). The following additional sales charge waivers are available for Class A shares if you:

• Acquire shares in connection with a reorganization pursuant to which the Fund acquires substantially all of the assets and liabilities of another fund in exchange solely for shares of the acquiring fund;

• Acquire shares in connection with the disposition of proceeds from the sale of shares of Managed High Yield Plus Fund Inc. that were acquired during that fund's initial public offering of shares and that meet certain other conditions described in its prospectus; or

• Acquire shares in connection with shares purchased by UBS AM (US) or any affiliate on behalf of a discretionary advisory client.

Reinstatement privilege—Class A shares. Shareholders who have redeemed Class A shares may reinstate their account without a sales charge by notifying the transfer agent of such desire and forwarding a check for the amount to be purchased within 365 days after the date of redemption. The reinstatement will be made at the net asset value per share next computed after the notice of reinstatement and check are received. The amount of a purchase under this reinstatement privilege cannot exceed the amount of the redemption proceeds. Gain on a redemption will be taxable regardless of whether the reinstatement privilege is exercised, although a loss arising out of a redemption will not be deductible to the extent the reinstatement privilege is exercised within 30 days after redemption, in which event an adjustment will be made to the shareholder's tax basis for shares acquired pursuant to the reinstatement privilege. Gain or loss on a redemption also will be readjusted for federal income tax purposes by the amount of any sales charge paid on Class A shares, under the circumstances and to the extent described in "Taxes—Special Rule for Class A Shareholders," below.

Purchases of shares through the PACE^SM Multi Advisor Program. An investor who participates in the PACE^SM Multi Advisor Program is eligible to purchase Class P shares. The PACE^SM Multi Advisor Program is an advisory program sponsored by UBS Financial Services Inc. that provides comprehensive investment services, including investor profiling, a personalized asset allocation strategy using an appropriate combination of funds and a quarterly investment performance review. Participation in the PACE^SM Multi Advisor Program is subject to payment of an advisory fee at the effective maximum annual rate of 2.5% of assets. Employees of UBS Financial Services Inc. and its affiliates are entitled to a waiver of this fee. Please contact your UBS Financial Services Inc. Financial Advisor or UBS Financial Services Inc. correspondent firms for more information concerning mutual funds that are available through the PACE^SM Multi Advisor Program.

Payments by UBS AM (US)—Class P shares. Class P shares are sold without sales charges and do not pay ongoing 12b-1 distribution or service fees. Only specific types of investors can purchase Class P shares.

Additional compensation to affiliated dealer. UBS AM (US) may pay its affiliate, UBS Financial Services Inc., the additional compensation in connection with the sale of Fund shares in consideration of distribution, marketing support and other services at an annual rate of 0.05% (5 basis points) of the value of the net assets invested in each Fund to be paid on a quarterly basis (although UBS Financial Services Inc. may choose not to receive such payments, or receive a reduced amount, on assets held in certain types of accounts or wrap fee advisory programs).

UBS Financial Services Inc. charges a minimum of $75,000 per calendar year for distribution, marketing support and other services.

The foregoing payments are made by UBS AM (US) out of its own resources. These payments are often referred to as "revenue sharing."

Additional compensation to financial institution(s). The unaffiliated financial institutions that receive additional compensation (as described in the Prospectus) from UBS AM (US) or the Advisor, from the Advisor's own resources, include:

Morgan Stanley Smith Barney LLC ("Morgan Stanley")

With respect to Fund Shares, UBS AM (US) as per written agreement between both parties, shall pay Morgan Stanley at an annual rate of 0.01% to 0.10% of each Fund, applied to Customer domestic Fund assets held in brokerage and advisory accounts at Morgan Stanley, based on the management fee of each Fund as determined by Morgan Stanley. Certain types of qualified accounts and fund types are excluded from this fee calculation.

Merrill Lynch, Pierce, Fenner & Smith Incorporated ("Merrill Lynch")

With respect to Fund Shares, UBS AM (US), as per written agreement between both parties, pays Merrill Lynch additional compensation as follows: (i) a fee of 0.25% (25 basis points) of the value of Gross Sales of Fund Shares; and (ii) an annual fee of 0.10% (10 basis points) of the aggregate average daily net asset value of Fund Shares held by Merrill Lynch customers for more than one year (including Fund Shares exchanged for Fund Shares of the Fund for certain other funds in the UBS fund complex).

"Fund Shares" for the purposes of the Merrill Lynch agreement mean all classes of shares of the Fund and certain other funds in the UBS fund complex where Merrill Lynch or any of its affiliates is the record owner or is broker-dealer of record, except (i) shares held in retirement or other benefit accounts under the record-keeping management of Merrill Lynch Retirement Group for which fees are payable by the Advisor to Merrill Lynch pursuant to a services agreement (i.e., not including IRA or similar accounts), and (ii) shares held through Merrill Lynch investment advisory programs. Fund Shares that are no longer held through such Merrill Lynch retirement accounts or investment advisory programs but continue to be held by Merrill Lynch customers will cease to be excluded from the definition of Fund Shares.

"Gross Sales" for the purposes of the Merrill Lynch agreement mean all sales of Fund Shares in which Merrill Lynch or any of its affiliates is record owner or broker-dealer of record, excluding sales of Fund Shares resulting from reinvestment of distributions and exchanges of Fund Shares within the UBS fund complex.

Raymond James & Associates, Inc. and Raymond James Financial Services, Inc. (collectively, "Raymond James")

With respect to Class A and Class P qualifying shares (shares sold through Raymond James), UBS AM (US), as per a written agreement between the parties, pays Raymond James quarterly at the annual rate of 0.17% of the average daily value of all qualifying shares of the Fund on assets. In addition, UBS AM (US) agrees to pay Raymond James $15 per purchase (Buy) transaction for Clients in Select account types which are made available without the imposition of a sales charge, transaction or trade charge by Raymond James. The foregoing payments are subject to a minimum payment to Raymond James of $15,000 per year.

Wells Fargo Advisors, LLC, Wells Fargo Advisors Financial Network, LLC, First Clearing, LLC (collectively, "Wells Fargo")

With respect to Fund Shares, UBS AM (US), per written agreement between said parties, pays Wells Fargo additional compensation as follows: (i) an annual fee of 0.13% (13 basis points), payable quarterly, on the total assets under management for the Fund held by Wells Fargo's customers or (ii) $250,000, whichever is greater. "Fund Shares" for purposes of the Wells Fargo agreement means all classes of shares of the Fund and certain other funds in the UBS Fund complex where Wells Fargo is the broker-dealer of record. This applies to both retail and advisory assets but does not apply to advisory fee based ERISA accounts. It does apply, however, to individual retirement accounts not covered by ERISA.

The foregoing payments are made by UBS AM (US) out of its own resources. Such payments are often referred to as "revenue sharing."

Additional information regarding purchases through letter of intent

To the extent that an investor purchases less than the dollar amount indicated on the Letter of Intent within the 13-month period, the sales charge will be adjusted upward for the entire amount purchased at the end of the 13-month period. This adjustment will be made by redeeming shares first from amounts held in escrow, and then from the account to cover the additional sales charge, the proceeds of which will be paid to the investor's investment professional and UBS Asset Management, as applicable, in accordance with the prospectus.

Letters of Intent are not available for certain employee benefit plans.

Additional exchange and redemption information. As discussed in the Prospectus, eligible shares of the Fund may be exchanged for shares of the corresponding class of most other Family Funds.

Shareholders will receive at least 60 days' notice of any termination or material modification of the exchange offer, except no notice need be given if, under extraordinary circumstances, either redemptions are suspended under the circumstances described below or the Fund temporarily delays or ceases the sales of its shares because it is unable to invest amounts effectively in accordance with the Fund's investment objective, policies and restrictions.

The Trust will satisfy redemption requests in cash to the fullest extent feasible, so long as such payments would not, in the opinion of the Advisor or the Board, result in the necessity of the Fund selling assets under disadvantageous conditions and to the detriment of the remaining shareholders of the Fund. Pursuant to the Trust's Agreement and Declaration of Trust, payment for shares redeemed may be made either in cash or in-kind, or partly in cash and partly in-kind. Under unusual circumstances, when the Board deems it in the best interest of the Fund's shareholders, the Trust may make payment for shares repurchased or redeemed in whole or in part in securities of the Fund taken at current values. With respect to such redemptions in kind, the Trust has made an election pursuant to Rule 18f-1 under the Act. This will require the Trust to redeem in cash at a shareholder's election in any case where the redemption involves less than $250,000 (or 1% of the Fund's net asset value at the beginning of each 90-day period during which such redemptions are in effect, if that amount is less than $250,000), during any 90-day period for any one shareholder. Should payment be made in securities, the redeeming shareholder may incur brokerage costs in converting such securities to cash. In-kind payments to non-affiliated shareholders need not constitute a cross-section of the Fund's portfolio. Where a shareholder has requested redemption of all or a part of the shareholder's investment and where the Fund computes such redemption in-kind, the Fund will not recognize gain or loss for federal tax purposes on the securities used to compute the redemption, but the shareholder will recognize gain or loss equal to the difference between the fair market value of the securities received and the shareholder's basis in the Fund shares redeemed. Pursuant to redemption in-kind procedures adopted by the Board on behalf of the Fund, the Trust is permitted to pay redemptions in-kind to shareholders that are affiliated persons of the Fund by nature of a greater than 5% ownership interest in the Fund.

A Fund may suspend redemption privileges or postpone the date of payment during any period (1) when the NYSE is closed or trading on the NYSE is restricted as determined by the SEC, (2) when an emergency exists, as defined by the SEC, that makes it not reasonably practicable for the Fund to dispose of securities owned by it or to determine fairly the value of its assets, or (3) as the SEC may otherwise permit. The redemption price may be more or less than the shareholder's cost, depending on the market value of the Fund's portfolio at the time.

Financial institutions. The Funds may authorize financial institutions, or their agents, to accept on the Funds' behalf purchase and redemption orders that are in "good form" in accordance with the policies of those institutions. The Funds will be deemed to have received these purchase and redemption orders when such financial institution or its agent accepts them. Like all customer orders, these orders will be priced based on a Fund's net asset value next computed after receipt of the order by the financial institutions or their agents. Financial institutions may include retirement plan service providers who aggregate purchase and redemption instructions received from numerous retirement plans or plan participants.

Automatic investment plan—Class A shares. The Underwriter or your investment professional offers an automatic investment plan with a minimum initial investment of $1,000 through which a Fund will deduct $50 or more on a monthly, quarterly, semiannual or annual basis from the investor's bank account to invest directly in the Fund's Class A shares. In addition to providing a convenient and disciplined manner of investing, participation in the automatic investment plan enables an investor to use the technique of "dollar cost averaging." When a shareholder invests the same dollar amount each month under the plan, the shareholder will purchase more shares when the Fund's net asset value per share is low and fewer shares when the net asset value per share is high. Using this technique, a shareholder's average purchase price per share over any given period will be lower than if the shareholder purchased a fixed number of shares on a monthly basis during the period. Of course, investing through the automatic investment plan does not assure a profit or protect against loss in declining markets. Additionally, because the automatic investment plan involves continuous investing regardless of price levels, an investor should consider his or her financial ability to continue purchases through periods of both low and high price levels. An investor should also consider whether a large, single investment would qualify for sales load reductions.

Automatic cash withdrawal plan—Class A shares

The Automatic Cash Withdrawal Plan allows investors to set up monthly, quarterly (March, June, September and December), semiannual (June and December) or annual (December) withdrawals from their Family Fund accounts. Minimum balances and withdrawals are:

• Minimum value of Fund shares is $5,000;

• Minimum withdrawals of $100.

Withdrawals under the Automatic Cash Withdrawal Plan will not be subject to a contingent deferred sales charge if the investor withdraws no more than 12% of the value of the Fund account when the shareholder signed up for the plan (during the first year under the plan). Shareholders who elect to receive dividends or other distributions in cash may not participate in the plan.

An investor's participation in the Automatic Cash Withdrawal Plan will terminate automatically if the "Initial Account Balance" (a term that means the value of the Fund account at the time the shareholder elects to participate in the Automatic Cash Withdrawal Plan), less aggregate redemptions made other than pursuant to the Automatic Cash Withdrawal Plan, is less than the minimum values specified above. Purchases of additional shares of the Fund concurrent with withdrawals are ordinarily disadvantageous to shareholders because of tax liabilities and, for Class A shares, initial sales charges. On or about the 20th of a month for monthly, quarterly and semiannual plans, your investment professional will arrange for redemption by a Fund of sufficient Fund shares to provide the withdrawal payments specified by participants in the Automatic Cash Withdrawal Plan. The payments generally are

mailed approximately five Business Days (defined under "Net Asset Value") after the redemption date. Withdrawal payments should not be considered dividends, but redemption proceeds. If periodic withdrawals continually exceed reinvested dividends and other distributions, a shareholder's investment may be correspondingly reduced. A shareholder may change the amount of the automatic cash withdrawal or terminate participation in the Automatic Cash Withdrawal Plan at any time without charge or penalty by written instructions with signatures guaranteed to your investment professional or BNY Mellon. Instructions to participate in the plan, change the withdrawal amount or terminate participation in the plan will not be effective until five days after written instructions with signatures guaranteed are received by BNY Mellon. Shareholders may request the forms needed to establish an Automatic Cash Withdrawal Plan from their investment professionals or BNY Mellon at 1-800-647 1568.

Individual retirement accounts

Self-directed IRAs are available in which purchases of shares of Family Funds and other investments may be made. Investors considering establishing an IRA should review applicable tax laws and should consult their tax advisors.

Transfer of securities

At the discretion of the Trust, investors may be permitted to purchase Fund shares by transferring securities to a Fund that meet the Fund's investment objective and policies. Securities transferred to a Fund will be valued in accordance with the same procedures used to determine the Fund's net asset value at the time of the next determination of net asset value after such acceptance. Shares issued by a Fund in exchange for securities will be issued at net asset value per share of the Fund determined as of the same time. All dividends, interest, subscription or other rights pertaining to such securities shall become the property of the Fund and must be delivered to the Fund by the investor upon receipt from the issuer. Investors who are permitted to transfer such securities will be required to recognize a gain or loss on such transfer and pay tax thereon, if applicable, measured by the difference between the fair market value of the securities and the investors' basis therein. Securities will not be accepted in exchange for shares of a Fund unless: (1) such securities are, at the time of the exchange, eligible to be included in the Fund's portfolio and current market quotations are readily available for such securities; (2) the investor represents and warrants that all securities offered to be exchanged are not subject to any restrictions upon their sale by the Fund under the 1933 Act, or under the laws of the country in which the principal market for such securities exists, or otherwise; and (3) the value of any such security (except US government securities) being exchanged, together with other securities of the same issuer owned by the Fund, will not exceed 5% of the Fund's net assets immediately after the transaction.

Valuation of shares

The price at which you may buy, sell or exchange Fund shares is based on net asset value per share. Each Fund generally calculates its net asset value on days that the NYSE is open. A Fund calculates net asset value separately for each class as of the close of regular trading on the NYSE (generally, 4:00 p.m., Eastern time). The NYSE normally is not open, and the Funds do not price their shares, on most national holidays and on Good Friday. To the extent that a Fund's assets are traded in other markets on days when the NYSE is not open, the value of the Fund's assets may be affected on those days. If trading on the NYSE is halted for the day before 4:00 p.m., Eastern time, a Fund's net asset value per share generally will still be calculated as of the close of regular trading on the NYSE. The time at which a Fund calculates its net asset value and until which purchase, sale or exchange orders are accepted may be changed as permitted by the SEC.

Each Fund calculates its net asset value based on the current market value, when available, for its portfolio securities. The Funds normally obtain market values for their investments from independent pricing sources and broker-dealers. Independent pricing sources may use reported last sale prices, official market closing prices, current market quotations or valuations from computerized "matrix" systems that derive values based on comparable investments. A matrix system incorporates parameters such as security quality, maturity and coupon, and/or

research and evaluations by its staff, including review of broker-dealer market price quotations, if available, in determining the valuation of the portfolio investments. Investments also may be valued based on appraisals derived from information concerning the investment or similar investments received from recognized dealers in those holdings. Investments traded in the OTC market and listed on The NASDAQ Stock Market, Inc. ("NASDAQ") normally are valued at the NASDAQ Official Closing Price. Other OTC securities are valued at the last bid price on the valuation date available prior to valuation. Investments that are listed on US and foreign stock exchanges normally are valued at the market closing price, the last sale price on the day the investments are valued or, lacking any sales on such day, at the last available bid price. In cases where investments are traded on more than one exchange, the investments are valued on the exchange designated as the primary market by the Advisor. If a market value is not readily available from an independent pricing source for a particular investment, that security or instrument is valued at fair value as determined in good faith by or under the direction of the Board. Various factors may be reviewed in order to make a good faith determination of an investment's fair value. These factors include, but are not limited to, fundamental analytical data relating to the investment; the nature and duration of restrictions on disposition of the investments; and the evaluation of forces which influence the market in which the investments are purchased and sold. Foreign currency exchange rates are generally determined as of the close of the NYSE.

Certain investments in which certain Funds invest are traded in markets that close before 4:00 p.m., Eastern time. Normally, developments that occur between the close of the foreign markets and 4:00 p.m., Eastern time, will not be reflected in the Fund's net asset value. However, if either of the Funds determine that such developments are so significant that they will materially affect the value of the Fund's investments, the Fund may adjust the previous closing prices to reflect what the Board believes to be the fair value of these investments as of 4:00 p.m., Eastern time.

A Fund may use a systematic fair valuation model provided by an independent third party to value investments principally traded in foreign markets in order to adjust for possible stale pricing that may occur between the close of the foreign exchanges and the time for valuation. The systematic fair valuation model may use calculations based on indices of domestic securities and other appropriate indicators, such as prices of relevant American Depositary Receipts and futures contracts. If an investment is valued at a "fair value," that value is likely to be different from the last quoted market price for the investment.

The amortized cost method of valuation, which approximates market value, generally is used to value short-term debt instruments with 60 days or less remaining to maturity, unless the Board determines that this does not represent fair value. Investments in open-end investment companies are valued at the daily closing net asset value of the respective investment company. Pursuant to the Funds' use of the practical expedient within ASC Topic 820, investments in non-registered investment companies are also valued at the daily net asset value. All investments quoted in foreign currencies will be valued daily in US dollars on the basis of the foreign currency exchange rates prevailing at the time such valuation is determined by the Funds' custodian.

Swaps are marked-to-market daily based upon values from third party vendors or quotations from market makers to the extent available, and the change in value, if any, is recorded as an unrealized gain or loss on the Statement of assets and liabilities. In the event that market quotations are not readily available or deemed unreliable, the swap is valued at fair value as determined in good faith by or under the direction of the Board.

Taxes

The following is a summary of certain additional tax considerations generally affecting the Funds and their shareholders that are not described in the Prospectus. No attempt is made to present a detailed explanation of the tax treatment of a Fund or its shareholders, and the discussion here and in the Prospectus is not intended as a substitute for careful tax planning.

This "Taxes" section is based on the Code and applicable regulations in effect on the date of this SAI. Future legislative, regulatory or administrative changes or court decisions may significantly change the tax rules applicable to a Fund and its shareholders. Any of these changes or court decisions may have a retroactive effect.

This is for general information only and not tax advice. All investors should consult their own tax advisors as to the federal, state, local and foreign tax provisions applicable to them.

Taxation of the Fund

Each Fund intends to elect and qualify each year as a regulated investment company (sometimes referred to as a "regulated investment company," "RIC" or "fund") under Subchapter M of the Code. If a Fund so qualifies, the Fund will not be subject to federal income tax on the portion of its investment company taxable income (that is, generally, taxable interest, dividends, net short-term capital gains, and other taxable ordinary income, net of expenses, without regard to the deduction for dividends paid) and net capital gain (that is, the excess of net long-term capital gains over net short-term capital losses) that it distributes to shareholders.

Qualification as a regulated investment company—In order to qualify for treatment as a regulated investment company, each Fund must satisfy the following requirements:

(i) Distribution Requirement—A Fund must distribute an amount equal to the sum of at least 90% of its investment company taxable income and 90% of its net tax-exempt income, if any, for the tax year (including, for purposes of satisfying this distribution requirement, certain distributions made by the Fund after the close of its taxable year that are treated as made during such taxable year).

(ii) Income Requirement—A Fund must derive at least 90% of its gross income from dividends, interest, certain payments with respect to securities loans, and gains from the sale or other disposition of stock, securities or foreign currencies, or other income (including, but not limited to, gains from options, futures or forward contracts) derived from its business of investing in such stock, securities or currencies and net income derived from qualified publicly traded partnerships ("QPTPs").

(iii) Asset Diversification Test—A Fund must satisfy the following Asset Diversification Test at the close of each quarter of the Fund's tax year: (1) at least 50% of the value of the Fund's assets must consist of cash and cash items, US government securities, securities of other regulated investment companies, and securities of other issuers (as to which the Fund has not invested more than 5% of the value of the Fund's total assets in securities of an issuer and as to which the Fund does not hold more than 10% of the outstanding voting securities of the issuer); and (2) no more than 25% of the value of the Fund's total assets may be invested in the securities of any one issuer (other than US government securities or securities of other regulated investment companies) or of two or more issuers which the Fund controls and which are engaged in the same or similar trades or businesses, or, in the securities of one or more QPTPs.

In some circumstances, the character and timing of income realized by a Fund for purposes of the Income Requirement or the identification of the issuer for purposes of the Asset Diversification Test is uncertain under current law with respect to a particular investment, and an adverse determination or future guidance by the Internal Revenue Service ("IRS") with respect to such type of investment may adversely affect a Fund's ability to satisfy these

requirements. See, "Tax Treatment of Portfolio Transactions" below with respect to the application of these requirements to certain types of investments. In other circumstances, a Fund may be required to sell portfolio holdings in order to meet the Income Requirement, Distribution Requirement, or Asset Diversification Test, which may have a negative impact on the Fund's income and performance.

Each Fund may use "equalization accounting" (in lieu of making some cash distributions) in determining the portion of its income and gains that has been distributed. If a Fund uses equalization accounting, it will allocate a portion of its undistributed investment company taxable income and net capital gain to redemptions of Fund shares and will correspondingly reduce the amount of such income and gains that it distributes in cash. If the IRS determines that a Fund's allocation is improper and that the Fund has under-distributed its income and gain for any taxable year, the Fund may be liable for federal income and/or excise tax. If, as a result of such adjustment, the Fund fails to satisfy the Distribution Requirement, the Fund will not qualify that year as a regulated investment company the effect of which is described in the following paragraph.

If for any taxable year a Fund does not qualify as a regulated investment company, all of its taxable income (including its net capital gain) would be subject to tax at the applicable corporate income tax rate without any deduction for dividends paid to shareholders, and the dividends would be taxable to the shareholders as ordinary income (or possibly as qualified dividend income) to the extent of the Fund's current and accumulated earnings and profits. Failure to qualify as a regulated investment company would thus have a negative impact on a Fund's income and performance. Subject to savings provisions for certain failures to satisfy the Income Requirement or Asset Diversification Test, which, in general, are limited to those due to reasonable cause and not willful neglect, it is possible that a Fund will not qualify as a regulated investment company in any given tax year. Even if such savings provisions apply, a Fund may be subject to a monetary sanction of $50,000 or more. Moreover, the Board reserves the right not to maintain the qualification of a Fund as a regulated investment company if it determines such a course of action to be beneficial to shareholders.

Portfolio turnover—For investors that hold their Fund shares in a taxable account, a high portfolio turnover rate may result in higher taxes. This is because a fund with a high turnover rate is likely to accelerate the recognition of capital gains and more of such gains are likely to be taxable as short-term rather than long-term capital gains in contrast to a comparable fund with a low turnover rate. Any such higher taxes would reduce the Fund's after-tax performance. See, "Taxation of Fund distributions—Distributions of capital gains" below. For non-US investors, any such acceleration of the recognition of capital gains that results in more short-term and less long-term capital gains being recognized by the Fund may cause such investors to be subject to increased US withholding taxes. See, "Non-US investors—Capital gain dividends" and "—Interest-related dividends and short-term capital gain dividends" below.

Capital loss carryovers—The capital losses of a Fund, if any, do not flow through to shareholders. Rather, a Fund may use its capital losses, subject to applicable limitations, to offset its capital gains without being required to pay taxes on or distribute to shareholders such gains that are offset by the losses. If a Fund has a "net capital loss" (that is, capital losses in excess of capital gains), the excess (if any) of the Fund's net short-term capital losses over its net long-term capital gains is treated as a short-term capital loss arising on the first day of the Fund's next taxable year, and the excess (if any) of the Fund's net long-term capital losses over its net short-term capital gains is treated as a long-term capital loss arising on the first day of the Fund's next taxable year. Any such net capital losses of a Fund that are not used to offset capital gains may be carried forward indefinitely to reduce any future capital gains realized by the Fund in succeeding taxable years. The amount of capital losses that can be carried forward and used in any single year is subject to an annual limitation if there is a more than 50% "change in ownership" of the Fund. An ownership change generally results when shareholders owning 5% or more of the Fund increase their aggregate holdings by more than 50% over a three-year look-back period. An ownership change could result in capital loss carryovers being used at a slower rate thereby reducing the Fund's ability to offset capital gains with those losses. An increase in the amount of taxable gains distributed to the Fund's shareholders could result from an ownership change. The Fund undertakes no obligation to avoid or prevent an ownership change, which can occur in the

normal course of shareholder purchases and redemptions or as a result of engaging in a tax-free reorganization with another fund. Moreover, because of circumstances beyond the Fund's control, there can be no assurance that the Fund will not experience, or has not already experienced, an ownership change. Additionally, if the Fund engages in a tax-free reorganization with another fund, the effect of these and other rules not discussed herein may be to disallow or postpone the use by the Fund of its capital loss carryovers (including any current year losses and built-in losses when realized) to offset its own gains or those of the other fund, or vice versa, thereby reducing the tax benefits Fund shareholders would otherwise have enjoyed from use of such capital loss carryovers.

Deferral of late year losses—The Fund may elect to treat part or all of any "qualified late year loss" as if it had been incurred in the succeeding taxable year in determining the Fund's taxable income, net capital gain, net short-term capital gain, and earnings and profits. The effect of this election is to treat any such "qualified late year loss" as if it had been incurred in the succeeding taxable year in characterizing Fund distributions for any calendar year (see, "Taxation of Fund Distributions—Distributions of capital gains" below). A "qualified late year loss" includes:

(i) any net capital loss incurred after October 31 of the current taxable year, or, if there is no such loss, any net long-term capital loss or any net short-term capital loss incurred after October 31 of the current taxable year ("post-October capital losses"), and

(ii) the sum of (1) the excess, if any, of (a) specified losses incurred after October 31 of the current taxable year, over (b) specified gains incurred after October 31 of the current taxable year and (2) the excess, if any, of (a) ordinary losses incurred after December 31 of the current taxable year, over (b) the ordinary income incurred after December 31 of the current taxable year.

The terms "specified losses" and "specified gains" mean ordinary losses and gains from the sale, exchange, or other disposition of property (including the termination of a position with respect to such property), foreign currency losses and gains, and losses and gains resulting from holding stock in a passive foreign investment company ("PFIC") for which a mark-to-market election is in effect. The terms "ordinary losses" and "ordinary income" mean other ordinary losses and income that are not described in the preceding sentence.

Undistributed capital gains—A Fund may retain or distribute to shareholders its net capital gain for each taxable year. Each Fund currently intends to distribute net capital gains. If a Fund elects to retain its net capital gain, the Fund will be taxed thereon (except to the extent of any available capital loss carryovers) at the applicable corporate income tax rate. If a Fund elects to retain its net capital gain, it is expected that the Fund also will elect to have shareholders treated as if each received a distribution of its pro rata share of such gain, with the result that each shareholder will be required to report its pro rata share of such gain on its tax return as long-term capital gain, will receive a refundable tax credit for its pro rata share of tax paid by the Fund on the gain, and will increase the tax basis for its shares by an amount equal to the deemed distribution less the tax credit.

Federal excise tax—To avoid a 4% non-deductible excise tax, a Fund must distribute by December 31 of each year an amount equal to at least: (1) 98% of its ordinary income for the calendar year, (2) 98.2% of capital gain net income (that is, the excess of the gains from sales or exchanges of capital assets over the losses from such sales or exchanges) for the one-year period ended on October 31 of such calendar year, and (3) any prior year undistributed ordinary income and capital gain net income. The Fund may elect to defer to the following year any net ordinary loss incurred for the portion of the calendar year which is after the beginning of the Fund's taxable year. Also, the Fund will defer any "specified gain" or "specified loss" which would be properly taken into account for the portion of the calendar year after October 31. Any net ordinary loss, specified gain, or specified loss deferred shall be treated as arising on January 1 of the following calendar year. Generally, each Fund intends to make sufficient distributions prior to the end of each calendar year to avoid any material liability for federal income and excise tax, but can give no assurances that all or a portion of such liability will be avoided. In addition, under certain circumstances,

temporary timing or permanent differences in the realization of income and expense for book and tax purposes can result in a Fund having to pay an excise tax.

Foreign income tax—Investment income received by a Fund from sources within foreign countries may be subject to foreign income tax withheld at the source and the amount of tax withheld generally will be treated as an expense of the Fund. The United States has entered into tax treaties with many foreign countries which entitle a Fund to a reduced rate of, or exemption from, tax on such income. Some countries require the filing of a tax reclaim or other forms to receive the benefit of the reduced tax rate; whether or when a Fund will receive the tax reclaim is within the control of the individual country. Information required on these forms may not be available such as shareholder information; therefore, a Fund may not receive the reduced treaty rates or potential reclaims. Other countries have conflicting and changing instructions and restrictive timing requirements which may cause a Fund not to receive the reduced treaty rates or potential reclaims. Other countries may subject capital gains realized by a Fund on sale or disposition of securities of that country to taxation. It is impossible to determine the effective rate of foreign tax in advance since the amount of a Fund's assets to be invested in various countries is not known. Under certain circumstances, a Fund may elect to pass-through foreign taxes paid by the Fund to shareholders, although it reserves the right not to do so. If the Fund makes such an election and obtains a refund of foreign taxes paid by the Fund in a prior year, the Fund may be eligible to reduce the amount of foreign taxes reported by the Fund to its shareholders, generally by the amount of the foreign taxes refunded, for the year in which the refund is received. See, "Taxation of Fund Distributions—Pass-through of foreign tax credits."

Taxation of fund distributions

Each Fund anticipates distributing substantially all of its investment company taxable income and net capital gain for each taxable year. Distributions by the Fund will be treated in the manner described below regardless of whether such distributions are paid in cash or reinvested in additional shares of the Fund (or of another fund). The Fund will send you information annually as to the federal income tax consequences of distributions made (or deemed made) during the year. A Fund will send you information annually as to the federal income tax consequences of distributions made (or deemed made) during the year.

Distributions of net investment income—The Funds receive ordinary income generally in the form of dividends and/or interest on their investments in portfolio securities. The Funds may also recognize ordinary income from other sources, including, but not limited to, certain gains on foreign currency-related transactions. This income, less expenses incurred in the operation of a Fund, constitutes the Fund's net investment income from which dividends may be paid to you. The Fund calculates income dividends and capital gains distributions the same way for each class. The amount of any income dividends per share will differ, however, generally due to any differences in the service (Rule 12b-1) fees applicable to the classes. If you are a taxable investor, distributions of net investment income generally are taxable as ordinary income to the extent of the Fund's earnings and profits. In the case of a Fund whose strategy includes investing in stocks of corporations, a portion of the income dividends paid to you may be qualified dividends eligible to be taxed at reduced rates. See the discussion below under the headings, "Qualified dividend income for individuals" and "Dividends-received deduction for corporations."

Distributions of capital gains—A Fund may derive capital gain and loss in connection with sales or other dispositions of its portfolio securities. Distributions derived from the excess of net short-term capital gain over net long-term capital loss will be taxable to you as ordinary income. Distributions paid from the excess of net long-term capital gain over net short-term capital loss will be taxable to you as long-term capital gain, regardless of how long you have held your shares in a Fund. Any net short-term or long-term capital gain realized by a Fund (net of any capital loss carryovers) generally will be distributed once each year and may be distributed more frequently, if necessary, in order to reduce or eliminate federal excise or income taxes on the Fund.

Returns of capital—Distributions by a Fund that are not paid from earnings and profits will be treated as a return of capital to the extent of (and in reduction of) the shareholder's tax basis in his shares; any excess will be treated as

gain from the sale of his shares. Thus, the portion of a distribution that constitutes a return of capital will decrease the shareholder's tax basis in his Fund shares (but not below zero), and will result in an increase in the amount of gain (or decrease in the amount of loss) that will be recognized by the shareholder for tax purposes on the later sale of such Fund shares. Return of capital distributions can occur for a number of reasons including, among others, a Fund over-estimates the income to be received from certain investments such as those classified as partnerships or equity REITs (see, "Tax treatment of portfolio transactions—Investments in US REITs" below).

Qualified dividend income for individuals—Ordinary income dividends reported by the Fund to shareholders as derived from qualified dividend income will be taxed in the hands of individuals and other noncorporate shareholders (i.e., certain trusts and estates) at the rates applicable to long-term capital gain. "Qualified dividend income" means dividends paid to a Fund (a) by domestic corporations, (b) by foreign corporations that are either (i) incorporated in a possession of the United States, or (ii) are eligible for benefits under certain income tax treaties with the United States that include an exchange of information program, or (c) with respect to stock of a foreign corporation that is readily tradable on an established securities market in the United States. Both a Fund and the investor must meet certain holding period requirements to qualify Fund dividends for this treatment. Specifically, a Fund must hold the stock for at least 61 days during the 121-day period beginning 60 days before the stock becomes ex-dividend. Similarly, investors must hold their Fund shares for at least 61 days during the 121-day period beginning 60 days before a Fund distribution goes ex-dividend. Income derived from investments in derivatives, fixed-income securities, US REITs, PFICs, and income received "in lieu of" dividends in a securities lending transaction generally is not eligible for treatment as qualified dividend income. If the qualifying dividend income received by a Fund is equal to or greater than 95% of the Fund's gross income (exclusive of net capital gain) in any taxable year, all of the ordinary income dividends paid by the Fund will be qualifying dividend income.

Dividends-received deduction for corporations—For corporate shareholders, a portion of the dividends paid by a Fund may qualify for the 50% corporate dividends-received deduction. The portion of dividends paid by a Fund that so qualifies will be reported by the Fund to shareholders each year and cannot exceed the gross amount of dividends received by the Fund from domestic (US) corporations. The availability of the dividends-received deduction is subject to certain holding period and debt financing restrictions that apply to both a Fund and the investor. Specifically, the amount that a Fund may report as eligible for the dividends-received deduction will be reduced or eliminated if the shares on which the dividends earned by the Fund were debt-financed or held by the Fund for less than a minimum period of time, generally 46 days during a 91-day period beginning 45 days before the stock becomes ex-dividend. Similarly, if your Fund shares are debt-financed or held by you for less than a 46-day period then the dividends-received deduction for Fund dividends on your shares may also be reduced or eliminated. Even if reported as dividends eligible for the dividends-received deduction, all dividends (including any deducted portion) must be included in your alternative minimum taxable income calculation. (Under 2017 legislation commonly known as the Tax Cuts and Jobs Act ("TCJA"), corporations are no longer subject to the alternative minimum tax for taxable years of the corporation beginning after December 31, 2017.) Income derived by a Fund from investments in derivatives, fixed-income and foreign securities generally is not eligible for this treatment.

Impact of realized but undistributed income and gains, and net unrealized appreciation of portfolio securities—At the time of your purchase of shares, the Fund's net asset value may reflect undistributed income, undistributed capital gains, or net unrealized appreciation of portfolio securities held by the Fund. A subsequent distribution to you of such amounts, although constituting a return of your investment, would be taxable, and would be taxed as ordinary income (some portion of which may be taxed as qualified dividend income), capital gains, or some combination of both, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an individual retirement account. The Fund may be able to reduce the amount of such distributions from capital gains by utilizing its capital loss carryovers, if any.

Pass-through of foreign tax credits—If more than 50% of a Fund's total assets are invested in securities of foreign corporations, the Fund may elect to pass through to you your pro rata share of foreign taxes paid by the Fund. If

this election is made, the Fund may report more taxable income to you than it actually distributes. You will then be entitled either to deduct your share of these taxes in computing your taxable income, or to claim a foreign tax credit for these taxes against your US federal income tax (subject to limitations for certain shareholders). A Fund will provide you with the information necessary to claim this deduction or credit on your personal income tax return if it makes this election. No deduction for foreign tax may be claimed by a noncorporate shareholder who does not itemize deductions or who is subject to the alternative minimum tax. Shareholders may be unable to claim a credit for the full amount of their proportionate shares of the foreign income tax paid by a Fund due to certain limitations that may apply. A Fund reserves the right not to pass through to its shareholders the amount of foreign income taxes paid by the Fund. Additionally, any foreign tax withheld on payments made "in lieu of" dividends or interest will not qualify for the pass-through of foreign tax credits to shareholders. See, "Tax treatment of portfolio transactions—Securities lending" below.

Tax credit bonds—If a Fund holds, directly or indirectly, one or more "tax credit bonds" (including Build America Bonds, clean renewable energy bonds and qualified tax credit bonds) on one or more applicable dates during a tax- able year, the Fund may elect to permit its shareholders to claim a tax credit on their income tax returns equal to each shareholder's proportionate share of tax credits from the applicable bonds that otherwise would be allowed to the Fund. (Under the TCJA, the Build America Bonds, clean renewable energy bonds and certain other qualified bonds may no longer be issued after December 31, 2017.) In such a case, shareholders must include in gross income (as interest) their proportionate share of the income attributable to their proportionate share of those offsetting tax credits. A shareholder's ability to claim a tax credit associated with one or more tax credit bonds may be subject to certain limitations imposed by the Code. Even if a Fund is eligible to pass through tax credits to shareholders, the Fund may choose not to do so.

US government securities—Income earned on certain US government obligations is exempt from state and local personal income taxes if earned directly by you. States also grant tax-free status to dividends paid to you from interest earned on direct obligations of the US government, subject in some states to minimum investment or reporting requirements that must be met by the Fund. Income on investments by the Fund in certain other obligations, such as repurchase agreements collateralized by US government obligations, commercial paper and federal agency-backed obligations (e.g., Ginnie Mae or Fannie Mae securities), generally does not qualify for tax-free treatment. The rules on exclusion of this income are different for corporations.

Dividends declared in December and paid in January—Ordinarily, shareholders are required to take distributions by a Fund into account in the year in which the distributions are made. However, dividends declared in October, November or December of any year and payable to shareholders of record on a specified date in such a month will be deemed to have been received by the shareholders (and made by the Fund) on December 31 of such calendar year if such dividends are actually paid in January of the following year. Shareholders will be advised annually as to the US federal income tax consequences of distributions made (or deemed made) during the year in accordance with the guidance that has been provided by the IRS.

Medicare tax—A 3.8% Medicare tax is imposed on net investment income earned by certain individuals, estates and trusts. "Net investment income," for these purposes, means investment income, including ordinary dividends and capital gain distributions received from a Fund and net gains from redemptions or other taxable dispositions of Fund shares, reduced by the deductions properly allocable to such income. In the case of an individual, the tax will be imposed on the lesser of (1) the shareholder's net investment income or (2) the amount by which the shareholder's modified adjusted gross income or adjusted gross income, as applicable, exceeds a certain threshold. This Medicare tax, if applicable, is reported by you on, and paid with, your federal income tax return.

Sales, exchanges and redemptions of Fund shares

If you are a taxable investor, sales, exchanges and redemptions (including redemptions in kind) of Fund shares are taxable transactions for federal and state income tax purposes. If you redeem your Fund shares, or exchange them for shares of a different fund, the IRS requires you to report any gain or loss on your redemption. If you held your

shares as a capital asset, the gain or loss that you realize will be a capital gain or loss and will be long-term or short-term, generally depending on how long you have held your shares. Capital losses in any year are deductible only to the extent of capital gains plus, in the case of a noncorporate taxpayer, $3,000 of ordinary income.

Tax basis information—Unless you are investing in a Fund through a tax-advantaged retirement account, such as a 401(k) plan or an individual retirement account, or a money market account, the Fund is required to report to you and the IRS annually on Form 1099-B the cost basis of shares where the cost basis of the shares is known by the Fund (referred to as "covered shares"). Cost basis will be calculated using the Funds' default method of average cost, unless you instruct a Fund in writing to use a different calculation method. In general, average cost is the total cost basis of all your shares in an account divided by the total number of shares in the account. To determine whether short-term or long-term capital gains taxes apply, the IRS presumes you redeem your oldest shares first.

The IRS permits the use of several methods to determine the cost basis of mutual fund shares. The method used will determine which specific shares are deemed to be sold when there are multiple purchases on different dates at differing share prices, and the entire position is not sold at one time. The Funds do not recommend any particular method of determining cost basis, and the use of other methods may result in more favorable tax consequences for some shareholders. It is important that you consult with your tax advisor to determine which method is best for you and then notify the Funds in writing if you intend to utilize a method other than average cost for covered shares.

In addition to the Funds' default method of average cost, other cost basis methods offered by the Funds, which you may elect to apply to covered shares, include:

• First-In, First-Out (FIFO)—shares acquired first in the account are the first shares depleted.

• Last-In, First-Out (LIFO)—shares acquired last in the account are the first shares depleted.

• Highest Cost In, First Out (HIFO)—shares acquired with the highest cost per share are the first shares depleted.

• Lowest Cost In, First Out (LOFO)—shares acquired with the lowest cost per share are the first shares depleted.

• Highest Cost Long-Term In, First Out (HILT)—long-term shares with the highest cost per share are the first shares depleted.

• Highest Cost Short-Term In, First Out (HIST)—short-term shares with the highest cost per share are the first shares depleted.

• Lowest Cost Long-Term In, First out (LILT)—long-term shares with the lowest cost per share are the first shares depleted.

• Lowest Cost Short-Term In, First out (LIST)—short-term shares with the lowest cost per share are the first shares depleted.

Specific Lot Identification—shareholder selects which lots to deplete at time of each disposition. Transaction amount must be in shares. If you identify an insufficient number of shares or do not make a timely identification, the transaction will default to the first-in, first-out method.

You may elect any of the available methods detailed above for your covered shares. If you do not notify the Funds in writing of your elected cost basis method upon the initial purchase into your account, the default method of average cost will be applied to your covered shares. The cost basis for covered shares will be calculated separately from any shares you may own for which cost basis information is not known by the Funds ("noncovered shares").

You may change or revoke the use of the average cost method and elect another cost basis method for covered shares if you notify the Funds in writing. You may change from average cost to another cost basis method for covered shares at any time, but only for shares acquired after the date of the change (the change is prospective). The basis of the shares that were averaged before the change will remain averaged after the date of the change.

With the exception of the specific lot identification method, the Funds first deplete noncovered shares in first-in, first-out order before applying your elected method to your remaining covered shares. If you want to deplete your shares in a different order then you must elect specific lot identification and choose the lots you wish to deplete first.

The Funds will compute and report the cost basis of your Fund shares sold or exchanged by taking into account all of the applicable adjustments to cost basis and holding periods as required by the Code and Treasury regulations for purposes of reporting these amounts to you and the IRS. However, the Funds are not required to, and in many cases the Funds do not possess the information to, take all possible basis, holding period or other adjustments into account in reporting cost basis information to you. Therefore, shareholders should carefully review the cost basis information provided by the Funds, and make any additional basis, holding period or other adjustments that are required by the Code and Treasury regulations when reporting these amounts on their federal income tax returns. Shareholders remain solely responsible for complying with all federal income tax laws when filing their federal income tax returns.

If you hold your Fund shares through a broker (or other nominee), please contact that broker (nominee) with respect to reporting of cost basis and available elections for your account.

Wash sales—All or a portion of any loss that you realize on a redemption of your Fund shares will be disallowed to the extent that you buy other shares in the Fund (through reinvestment of dividends or otherwise) within 30 days before or after your share redemption. Any loss disallowed under these rules will be added to your tax basis in the new shares.

Redemptions at a loss within six months of purchase—Any loss incurred on a redemption or exchange of shares held for six months or less will be treated as long-term capital loss to the extent of any long-term capital gain distributed to you by the Fund on those shares.

Deferral of basis—Class A Shareholders Only—If a shareholder (a) incurs a sales charge in acquiring shares of the Fund, (b) disposes of such shares less than 91 days after they are acquired, and (c) subsequently acquires shares of the Fund or another fund by January 31 of the calendar year following the calendar year in which the disposition of the original shares occurred at a reduced sales charge pursuant to a right to reinvest at such reduced sales charge acquired in connection with the acquisition of the shares disposed of, then the sales charge on the shares disposed of (to the extent of the reduction in the sales charge on the shares subsequently acquired) shall not be taken into account in determining gain or loss on the shares disposed of, but shall be treated as incurred on the acquisition of the shares subsequently acquired. The wash sale rules may also limit the amount of loss that may be taken into account on disposition after such adjustment.

Reportable transactions—Under Treasury regulations, if a shareholder recognizes a loss with respect to a Fund's shares of $2 million or more for an individual shareholder or $10 million or more for a corporate shareholder (or certain greater amounts over a combination of years), the shareholder must file with the IRS a disclosure statement on Form 8886. The fact that a loss is reportable under these regulations does not affect the legal determination of whether the taxpayer's treatment of the loss is proper. Shareholders should consult their tax advisors to determine the applicability of these regulations in light of their individual circumstances.

Tax treatment of portfolio transactions

Set forth below is a general description of the tax treatment of certain types of securities, investment techniques and transactions that may apply to a Fund and, in turn, affect the amount, character and timing of dividends and distributions payable by a Fund to its shareholders. This section should be read in conjunction with the sections above for a detailed description of the various types of securities and investment techniques that apply to a Fund.

In general—In general, gain or loss recognized by a Fund on the sale or other disposition of portfolio investments will be a capital gain or loss. Such capital gain and loss may be long-term or short-term depending, in general, upon the length of time a particular investment position is maintained and, in some cases, upon the nature of the transaction. Property held for more than one year generally will be eligible for long-term capital gain or loss treatment. The application of certain rules described below may serve to alter the manner in which the holding period for a security is determined or may otherwise affect the characterization as long-term or short-term, and also the timing of the realization and/or character, of certain gains or losses.

Certain fixed-income investments—Gain recognized on the disposition of a debt obligation purchased by a Fund at a market discount (generally, at a price less than its principal amount) will be treated as ordinary income to the extent of the portion of the market discount which accrued during the period of time the Fund held the debt obligation unless the Fund made a current inclusion election to accrue market discount into income as it accrues. If a Fund purchases a debt obligation (such as a zero coupon security or pay-in-kind security) that was originally issued at a discount, the Fund generally is required to include in gross income each year the portion of the original issue discount which accrues during such year. Therefore, a Fund's investment in such securities may cause a Fund to recognize income and make distributions to shareholders before it receives any cash payments on the securities. To generate cash to satisfy those distribution requirements, a Fund may have to sell portfolio securities that it otherwise might have continued to hold or to use cash flows from other sources such as the sale of Fund shares.

Investments in debt obligations that are at risk of or in default present tax issues for a Fund—Tax rules are not entirely clear about issues such as whether and to what extent a Fund should recognize market discount on a debt obligation, when a Fund may cease to accrue interest, original issue discount or market discount, when and to what extent a Fund may take deductions for bad debts or worthless securities and how a Fund should allocate payments received on obligations in default between principal and income. These and other related issues will be addressed by the Funds in order to ensure that it distributes sufficient income to preserve its status as a regulated investment company.

Options, futures, forward contracts, swap agreements and hedging transactions—In general, option premiums received by a Fund are not immediately included in the income of the Fund. Instead, the premiums are recognized when the option contract expires, the option is exercised by the holder, or the Fund transfers or otherwise terminates the option (e.g., through a closing transaction). If an option written by a Fund is exercised and the Fund sells or delivers the underlying stock, the Fund generally will recognize capital gain or loss equal to (a) the sum of the strike price and the option premium received by the Fund minus (b) the Fund's basis in the stock. Such gain or loss generally will be short-term or long-term depending upon the holding period of the underlying stock. If securities are purchased by a Fund pursuant to the exercise of a put option written by it, the Fund generally will subtract the premium received from its cost basis in the securities purchased. The gain or loss with respect to any termination of a Fund's obligation under an option other than through the exercise of the option and related sale or delivery of the underlying stock generally will be short-term gain or loss depending on whether the premium income received by the Fund is greater or less than the amount paid by the Fund (if any) in terminating the transaction. Thus, for example, if an option written by a Fund expires unexercised, the Fund generally will recognize short-term gain equal to the premium received.

The tax treatment of certain futures contracts entered into by a Fund as well as listed non-equity options written or purchased by a Fund on US exchanges (including options on futures contracts, broad-based equity indices and debt

securities) may be governed by section 1256 of the Code ("section 1256 contracts"). Gains or losses on section 1256 contracts generally are considered 60% long-term and 40% short-term capital gains or losses ("60/40"), although certain foreign currency gains and losses from such contracts may be treated as ordinary in character. Also, any section 1256 contracts held by a Fund at the end of each taxable year (and, for purposes of the 4% excise tax, on certain other dates as prescribed under the Code) are "marked to market" with the result that unrealized gains or losses are treated as though they were realized and the resulting gain or loss is treated as ordinary or 60/40 gain or loss, as applicable. Section 1256 contracts do not include any interest rate swap, currency swap, basis swap, interest rate cap, interest rate floor, commodity swap, equity swap, equity index swap, credit default swap, or similar agreement.

In addition to the special rules described above in respect of options and futures transactions, a Fund's transactions in other derivative instruments (including options, forward contracts and swap agreements) as well as its other hedging, short sale, or similar transactions, may be subject to one or more special tax rules (including the constructive sale, notional principal contract, straddle, wash sale and short sale rules). These rules may affect whether gains and losses recognized by a Fund are treated as ordinary or capital or as short-term or long-term, accelerate the recognition of income or gains to a Fund, defer losses to a Fund, and cause adjustments in the holding periods of a Fund's securities. These rules, therefore, could affect the amount, timing and/or character of distributions to shareholders. Moreover, because the tax rules applicable to derivative instruments are in some cases uncertain under current law, an adverse determination or future guidance by the IRS with respect to these rules (which determination or guidance could be retroactive) may affect whether a Fund has made sufficient distributions, and otherwise satisfied the relevant requirements, to maintain its qualification as a regulated investment company and avoid a fund-level tax.

Certain of a Fund's investments in derivatives and foreign currency-denominated instruments, and a Fund's transactions in foreign currencies and hedging activities, may produce a difference between its book income and its taxable income. If a Fund's book income is less than the sum of its taxable income and net tax-exempt income (if any), the Fund could be required to make distributions exceeding book income to qualify as a regulated investment company. If a Fund's book income exceeds the sum of its taxable income and net tax-exempt income (if any), the distribution of any such excess will be treated as (i) a dividend to the extent of the Fund's remaining earnings and profits (including current earnings and profits arising from tax-exempt income, reduced by related deductions), (ii) thereafter, as a return of capital to the extent of the recipient's basis in the shares, and (iii) thereafter, as gain from the sale or exchange of a capital asset.

Foreign currency transactions—A Fund's transactions in foreign currencies, foreign currency-denominated debt obligations and certain foreign currency options, futures contracts and forward contracts (and similar instruments) may give rise to ordinary income or loss to the extent such income or loss results from fluctuations in the value of the foreign currency concerned. This treatment could increase or decrease a Fund's ordinary income distributions to you, and may cause some or all of a Fund's previously distributed income to be classified as a return of capital. In certain cases, a Fund may make an election to treat such gain or loss as capital.

PFIC investments—A Fund may invest in stocks of foreign companies that may be classified under the Code as PFICs. In general, a foreign company is classified as a PFIC if at least one-half of its assets constitute investment-type assets or 75% or more of its gross income is investment-type income. When investing in PFIC securities, a Fund intends to mark-to-market these securities under certain provisions of the Code and recognize any unrealized gains as ordinary income at the end of the Fund's fiscal and excise tax years. Deductions for losses are allowable only to the extent of any current or previously recognized gains. These gains (reduced by allowable losses) are treated as ordinary income that a Fund is required to distribute, even though it has not sold or received dividends from these securities. You should also be aware that the designation of a foreign security as a PFIC security will cause its income dividends to fall outside of the definition of qualified foreign corporation dividends. These dividends generally will not qualify for the reduced rate of taxation on qualified dividends when distributed to you by a Fund. For-

eign companies are not required to identify themselves as PFICs. Due to various complexities in identifying PFICs, a fund can give no assurances that it will be able to identify portfolio securities in foreign corporations that are PFICs in time for the fund to make a mark-to-market election. If a Fund is unable to identify an investment as a PFIC and thus does not make a mark-to-market election, the Fund may be subject to US federal income tax on a portion of any "excess distribution" or gain from the disposition of such shares even if such income is distributed as a taxable dividend by the Fund to its shareholders. Additional charges in the nature of interest may be imposed on a Fund in respect of deferred taxes arising from such distributions or gains.

Investments in US REITs—A US REIT is not subject to federal income tax on the income and gains it distributes to shareholders. Dividends paid by a US REIT, other than capital gain distributions, will be taxable as ordinary income up to the amount of the US REIT's current and accumulated earnings and profits. Capital gain dividends paid by a US REIT to a Fund will be treated as long-term capital gains by the Fund and, in turn, may be distributed by the Fund to its shareholders as a capital gain distribution. Because of certain noncash expenses, such as property depreciation, an equity US REIT's cash flow may exceed its taxable income. The equity US REIT, and in turn a Fund, may distribute this excess cash to shareholders in the form of a return of capital distribution. However, if a US REIT is operated in a manner that fails to qualify as a REIT, an investment in the US REIT would become subject to double taxation, meaning the taxable income of the US REIT would be subject to federal income tax at the applicable corporate income tax rate without any deduction for dividends paid to shareholders and the dividends would be taxable to shareholders as ordinary income (or possibly as qualified dividend income) to the extent of the US REIT's current and accumulated earnings and profits. Also, see, "Tax treatment of portfolio transactions—Investment in taxable mortgage pools (excess inclusion income)" and "Non-US investors—Investment in US real property" below with respect to certain other tax aspects of investing in US REITs.

Investment in non-US REITs—While non-US REITs often use complex acquisition structures that seek to minimize taxation in the source country, an investment by a Fund in a non-US REIT may subject the Fund, directly or indirectly, to corporate taxes, withholding taxes, transfer taxes and other indirect taxes in the country in which the real estate acquired by the non-US REIT is located. A Fund's pro rata share of any such taxes will reduce the Fund's return on its investment. A Fund's investment in a non-US REIT may be considered an investment in a PFIC, as discussed above in "PFIC investments." Additionally, foreign withholding taxes on distributions from the non-US REIT may be reduced or eliminated under certain tax treaties, as discussed above in "Taxation of the Fund—Foreign income tax." Also, a Fund in certain limited circumstances may be required to file an income tax return in the source country and pay tax on any gain realized from its investment in the non-US REIT under rules similar to those in the United States which tax foreign persons on gain realized from dispositions of interests in US real estate.

Investment in taxable mortgage pools (excess inclusion income)—Under a Notice issued by the IRS, the Code and Treasury regulations to be issued, a portion of a Fund's income from a US REIT that is attributable to the REIT's residual interest in REMIC or equity interests in a "taxable mortgage pool" (referred to in the Code as an excess inclusion) will be subject to federal income tax in all events. The excess inclusion income of a regulated investment company, such as a Fund, will be allocated to shareholders of the regulated investment company in proportion to the dividends received by such shareholders, with the same consequences as if the shareholders held the related REMIC residual interest or, if applicable, taxable mortgage pool directly. In general, excess inclusion income allocated to shareholders (i) cannot be offset by net operating losses (subject to a limited exception for certain thrift institutions), (ii) will constitute unrelated business taxable income ("UBTI") to entities (including qualified pension plans, individual retirement accounts, 401(k) plans, Keogh plans or other tax-exempt entities) subject to tax on UBTI, thereby potentially requiring such an entity that is allocated excess inclusion income, and otherwise might not be required to file a tax return, to file a tax return and pay tax on such income, and (iii) in the case of a foreign stockholder, will not qualify for any reduction in US federal withholding tax. In addition, if at any time during any taxable year a "disqualified organization" (which generally includes certain cooperatives, governmental entities, and tax-exempt organizations not subject to UBTI) is a record holder of a share in a regulated investment company, then the regulated investment company will be subject to a tax equal to that portion of its excess inclusion income for

the taxable year that is allocable to the disqualified organization, multiplied by the applicable corporate income tax rate. The Notice imposes certain reporting requirements upon regulated investment companies that have excess inclusion income. There can be no assurance that a Fund will not allocate to shareholders excess inclusion income.

These rules are potentially applicable to a Fund with respect to any income it receives from the equity interests of certain mortgage pooling vehicles, either directly or, as is more likely, through an investment in a US REIT. It is unlikely that these rules will apply to a Fund that has a non-REIT strategy.

Investments in partnerships and QPTPs—For purposes of the Income Requirement, income derived by a Fund from a partnership that is not a QPTP will be treated as qualifying income only to the extent such income is attributable to items of income of the partnership that would be qualifying income if realized directly by the Fund. While the rules are not entirely clear with respect to a Fund investing in a partnership outside a master-feeder structure, for purposes of testing whether a Fund satisfies the Asset Diversification Test, the Fund generally is treated as owning a pro rata share of the underlying assets of a partnership. See, "Taxation of the Fund." In contrast, different rules apply to a partnership that is a QPTP. A QPTP is a partnership (a) the interests in which are traded on an established securities market, (b) that is treated as a partnership for federal income tax purposes, and (c) that derives less than 90% of its income from sources that satisfy the Income Requirement (e.g., because it invests in commodities). All of the net income derived by a Fund from an interest in a QPTP will be treated as qualifying income but the Fund may not invest more than 25% of its total assets in one or more QPTPs. However, there can be no assurance that a partnership classified as a QPTP in one year will qualify as a QPTP in the next year. Any such failure to annually qualify as a QPTP might, in turn, cause a Fund to fail to qualify as a regulated investment company. Although, in general, the passive loss rules of the Code do not apply to RICs, such rules do apply to a Fund with respect to items attributable to an interest in a QPTP. Fund investments in partnerships, including in QPTPs, may result in the Fund's being subject to state, local or foreign income, franchise or withholding tax liabilities.

Securities lending—While securities are loaned out by a Fund, the Fund generally will receive from the borrower amounts equal to any dividends or interest paid on the borrowed securities. For federal income tax purposes, payments made "in lieu of" dividends are not considered dividend income. These distributions will neither qualify for the reduced rate of taxation for individuals on qualified dividends nor the 50% dividends-received deduction for corporations. Also, any foreign tax withheld on payments made "in lieu of" dividends or interest will not qualify for the pass-through of foreign tax credits to shareholders.

Investments in convertible securities—Convertible debt is ordinarily treated as a "single property" consisting of a pure debt interest until conversion, after which the investment becomes an equity interest. If the security is issued at a premium (i.e., for cash in excess of the face amount payable on retirement), the creditor-holder may amortize the premium over the life of the bond. If the security is issued for cash at a price below its face amount, the creditor-holder must accrue original issue discount in income over the life of the debt. The creditor-holder's exercise of the conversion privilege is treated as a nontaxable event. Mandatorily convertible debt (e.g., an exchange traded note or ETN issued in the form of an unsecured obligation that pays a return based on the performance of a specified market index, exchange currency, or commodity) is often, but not always, treated as a contract to buy or sell the reference property rather than debt. Similarly, convertible preferred stock with a mandatory conversion feature is ordinarily, but not always, treated as equity rather than debt. Dividends received generally are qualified dividend income and eligible for the corporate dividends-received deduction. In general, conversion of preferred stock for common stock of the same corporation is tax-free. Conversion of preferred stock for cash is a taxable redemption. Any redemption premium for preferred stock that is redeemable by the issuing company might be required to be amortized under original issue discount principles.

Investments in securities of uncertain tax character—A Fund may invest in securities the US federal income tax treatment of which may not be clear or may be subject to recharacterization by the IRS. To the extent the tax treatment of such securities or the income from such securities differs from the tax treatment expected by a Fund, it could

affect the timing or character of income recognized by the Fund, requiring the Fund to purchase or sell securities, or otherwise change its portfolio, in order to comply with the tax rules applicable to regulated investment companies under the Code.

Backup withholding

By law, a Fund may be required to withhold a portion of your taxable dividends and sales proceeds unless you:

• provide your correct social security or taxpayer identification number,

• certify that this number is correct,

• certify that you are not subject to backup withholding, and

• certify that you are a US person (including a US resident alien).

A Fund also must withhold if the IRS instructs it to do so. When withholding is required, the amount will be 24% of any distributions or proceeds paid. Backup withholding is not an additional tax. Any amounts withheld may be credited against the shareholder's US federal income tax liability, provided the appropriate information is furnished to the IRS. Certain payees and payments are exempt from backup withholding and information reporting. The special US tax certification requirements applicable to non-US investors to avoid backup withholding are described under the "Non-US investors" heading below.

Non-US investors

Non-US investors (shareholders who, as to the United States, are nonresident alien individuals, foreign trusts or estates, foreign corporations, or foreign partnerships) may be subject to US withholding and estate tax and are subject to special US tax certification requirements. Non-US investors should consult their tax advisors about the applicability of US tax withholding and the use of the appropriate forms to certify their status.

In general—The United States imposes a flat 30% withholding tax (or a withholding tax at a lower treaty rate) on US source dividends, including on income dividends paid to you by a Fund, subject to certain exemptions described below. However, notwithstanding such exemptions from US withholding at the source, any dividends and distributions of income and capital gains, including the proceeds from the sale of your Fund shares, will be subject to backup withholding at a rate of 24% if you fail to properly certify that you are not a US person.

Capital gain dividends—In general, a capital gain dividend reported by a Fund to shareholders as paid from its net long-term capital gains, other than long-term capital gains realized on disposition of US real property interests (see the discussion below) is not subject to US withholding tax unless you are a nonresident alien individual present in the United States for a period or periods aggregating 183 days or more during the calendar year.

Interest-related dividends and short-term capital gain dividends—Generally, dividends reported by a Fund to shareholders as interest-related dividends and paid from its qualified net interest income from US sources and short-term capital gain dividends reported by a Fund to shareholders as paid from its net short-term capital gains are not subject to US withholding tax. However, the Funds do not intend to report interest-related dividends or short-term capital gain dividends for the benefit of non-US investors. As a result, non-US investors may be subject to more US withholding tax than would otherwise be the case.

Net investment income from dividends on stock and foreign source interest income continue to be subject to withholding tax; foreign tax credits—Ordinary dividends paid by a Fund to non-US investors on the income earned on portfolio investments in (i) the stock of domestic and foreign corporations and (ii) the debt of foreign issuers continue to be subject to US withholding tax. Foreign shareholders may be subject to US withholding tax at a rate of 30% on the income resulting from an election to pass-through foreign tax credits to shareholders, but may not

be able to claim a credit or deduction with respect to the withholding tax for the foreign tax treated as having been paid by them.

Income effectively connected with a US trade or business—If the income from a Fund is effectively connected with a US trade or business carried on by a foreign shareholder, then ordinary income dividends, capital gain dividends and any gains realized upon the sale or redemption of shares of the Fund will be subject to US federal income tax at the rates applicable to US citizens or domestic corporations and require the filing of a nonresident US income tax return.

Investment in US real property—The Foreign Investment in Real Property Tax Act of 1980 ("FIRPTA") makes non-US persons subject to US tax on disposition of a US real property interest ("USRPI") as if he or she were a US person. Such gain is sometimes referred to as FIRPTA gain. A Fund may invest in equity securities of corporations that invest in USRPI, including US REITs, which may trigger FIRPTA gain to the Fund's non-US shareholders. The Code provides a look-through rule for distributions of FIRPTA gain when a RIC is classified as a qualified investment entity. A RIC will be classified as a qualified investment entity if, in general, 50% or more of the RIC's assets consist of interests in US REITs and other US real property holding corporations ("USRPHC"). If a RIC is a qualified investment entity and the non-US shareholder owns more than 5% of a class of Fund shares at any time during the one-year period ending on the date of the FIRPTA distribution, the FIRPTA distribution to the non-US shareholder is treated as gain from the disposition of a USRPI, causing the distribution to be subject to US withholding tax at the applicable corporate income tax rate (unless reduced by future regulations), and requiring the non-US shareholder to file a nonresident US income tax return. In addition, even if the non-US shareholder does not own more than 5% of a class of Fund shares, but the Fund is a qualified investment entity, the FIRPTA distribution will be taxable as ordinary dividends (rather than as a capital gain or short-term capital gain dividend) subject to withholding at 30% or lower treaty rate.

Because each Fund expects to invest less than 50% of its assets at all times, directly or indirectly, in US real property interests, the Funds expect that neither gain on the sale or redemption of Fund shares nor Fund dividends and distributions would be subject to FIRPTA reporting and tax withholding.

US estate tax—Transfers by gift of shares of a Fund by a foreign shareholder who is a nonresident alien individual will not be subject to US federal gift tax. An individual who, at the time of death, is a non-US shareholder will nevertheless be subject to US federal estate tax with respect to Fund shares at the graduated rates applicable to US citizens and residents, unless a treaty exemption applies. If a treaty exemption is available, a decedent's estate may nonetheless need to file a US estate tax return to claim the exemption in order to obtain a US federal transfer certificate. The transfer certificate will identify the property (i.e., Fund shares) as to which the US federal estate tax lien has been released. In the absence of a treaty, there is a $13,000 statutory estate tax credit (equivalent to US situs assets with a value of $60,000). For estates with US situs assets of not more than $60,000, a Fund may accept, in lieu of a transfer certificate, an affidavit from an appropriate individual evidencing that decedent's US situs assets are below this threshold amount.

US tax certification rules—Special US tax certification requirements may apply to non-US shareholders both to avoid US backup withholding imposed at a rate of 24% and to obtain the benefits of any treaty between the United States and the shareholder's country of residence. In general, if you are a non-US shareholder, you must provide a Form W-8 BEN (or other applicable Form W-8) to establish that you are not a US person, to claim that you are the beneficial owner of the income and, if applicable, to claim a reduced rate of, or exemption from, withholding as a resident of a country with which the United States has an income tax treaty. A Form W-8 BEN provided without a US taxpayer identification number will remain in effect for a period beginning on the date signed and ending on the last day of the third succeeding calendar year unless an earlier change of circumstances makes the information on the form incorrect. Certain payees and payments are exempt from backup withholding.

The tax consequences to a non-US shareholder entitled to claim the benefits of an applicable tax treaty may be different from those described herein. Non-US shareholders are urged to consult their own tax advisors with respect to the particular tax consequences to them of an investment in the Fund, including the applicability of foreign tax.

Foreign Account Tax Compliance Act ("FATCA")—Under FATCA, a Fund will be required to withhold a 30% tax on the following payments or distributions made by the Fund to certain foreign entities, referred to as foreign financial institutions ("FFI") or non-financial foreign entities ("NFFE"): (a) income dividends and (b) after December 31, 2018, certain capital gain distributions, return of capital distributions and the proceeds arising from the sale of Fund shares. The FATCA withholding tax generally can be avoided: (a) by an FFI, if it reports certain direct and indirect ownership of foreign financial accounts held by US persons with the FFI and (b) by an NFFE, if it meets certification requirements described below. The US Treasury has negotiated intergovernmental agreements ("IGA") with certain countries and is in various stages of negotiations with a number of other foreign countries with respect to one or more alternative approaches to implement FATCA; an entity in one of those countries may be required to comply with the terms of an IGA instead of US Treasury regulations.

An FFI can avoid FATCA withholding if it is deemed compliant or by becoming a "participating FFI," which requires the FFI to enter into a US tax compliance agreement with the IRS under section 1471(b) of the Code ("FFI agreement") under which it agrees to verify, report and disclose certain of its US accountholders and meet certain other specified requirements. The FFI will either report the specified information about the US accounts to the IRS, or, to the government of the FFI's country of residence (pursuant to the terms and conditions of applicable law and an applicable IGA entered into between the US and the FFI's country of residence), which will, in turn, report the specified information to the IRS. An FFI that is resident in a country that has entered into an IGA with the US to implement FATCA will be exempt from FATCA withholding provided that the FFI shareholder and the applicable foreign government comply with the terms of such agreement.

An NFFE that is the beneficial owner of a payment from the Fund can avoid the FATCA withholding tax generally by certifying that it does not have any substantial US owners or by providing the name, address and taxpayer identification number of each substantial US owner. The NFFE will report the information to the Fund or other applicable withholding agent, which will, in turn, report the information to the IRS.

Such foreign shareholders also may fall into certain exempt, excepted or deemed compliant categories as established by US Treasury regulations, IGAs, and other guidance regarding FATCA.

An FFI or NFFE that invests in a Fund will need to provide the Fund with documentation properly certifying the entity's status under FATCA in order to avoid FATCA withholding. Non-US investors should consult their own tax advisors regarding the impact of these requirements on their investment in a Fund. The requirements imposed by FATCA are different from, and in addition to, the US tax certification rules to avoid backup withholding described above. Shareholders are urged to consult their tax advisors regarding the application of these requirements to their own situation.

Effect of future legislation; local tax considerations

The foregoing general discussion of US federal income tax consequences is based on the Code and the regulations issued thereunder as in effect on the date of this SAI. Future legislative or administrative changes or court decisions may significantly change the conclusions expressed herein, and any such changes or decisions may have a retroactive effect with respect to the transactions contemplated herein. Rules of state and local taxation of ordinary income, qualified dividend income and capital gain dividends may differ from the rules for US federal income taxation described above. Distributions may also be subject to additional state, local and foreign taxes depending on each shareholder's particular situation. Non-US shareholders may be subject to US tax rules that differ significantly from those summarized above. Shareholders are urged to consult their tax advisors as to the consequences of these and other state and local tax rules affecting investment in a Fund.

This discussion of "Taxes" is not intended or written to be used as tax advice and does not purport to deal with all federal tax consequences applicable to all categories of investors, some of which may be subject to special rules. You should consult your own tax advisor regarding your particular circumstances before making an investment in a Fund.

Potential conflicts of interest

Activities of UBS Asset Management (Americas) Inc. and its affiliates (collectively, "UBS AM"), UBS Securities LLC and UBS Financial Services Inc. and their affiliates (collectively, "UBS") and other accounts managed by UBS

UBS AM is a large asset management firm with approximately $817 billion in assets under management worldwide as of June 30, 2018.¹ UBS AM offers investment capabilities and investment styles across all major traditional and alternative asset classes, including equity, fixed income, currency, hedge fund, real estate, infrastructure and private equity investment capabilities that can also be combined in multi-asset strategies. UBS AM has around 3,600 employees located in 23 countries. UBS Asset Management is headquartered in London with other main offices in Chicago, Frankfurt, Hartford, Hong Kong, New York, Paris, Sydney, Tokyo, Toronto and Zurich.

UBS is a worldwide full-service investment banking, broker-dealer, asset management and financial services organization. As a result, UBS AM and UBS (including, for these purposes, their directors, partners, officers and employees) worldwide, including the entities and personnel who may be involved in the investment activities and business operations of a Fund, are engaged in businesses and have interests other than that of managing the Funds. These activities and interests include potential multiple advisory, transactional, financial, consultative, and other interests in transactions, companies, securities and other instruments that may be engaged in, purchased or sold by a Fund. This section sets forth considerations of which investors in a Fund should be aware, and that may cause conflicts of interest on the part of UBS and UBS AM that could disadvantage the Funds. To address these potential conflicts, UBS and UBS AM have established various policies and procedures that are reasonably designed to detect and prevent these potential conflicts of interest and prevent the Funds from being disadvantaged.

Prospective investors should carefully review the following, which more fully describes these and other potential conflicts of interest presented by UBS AM' and UBS' other businesses and interests.

Potential conflicts relating to portfolio decisions, the sale of fund shares and the allocation of investment opportunities

UBS' other activities may have an impact on the Funds. UBS AM (Americas) makes decisions for the Funds in accordance with its obligations as investment advisor to the Funds. However, UBS' other activities may, at the same time have a negative impact on the Funds. As a result of the various activities and interests of UBS, it is likely that the Funds will have multiple business relationships with, engage in transactions with, make voting decisions with respect to, or obtain services from UBS and other entities for which UBS performs or seeks to perform investment banking or other services. It is also likely that the Funds will undertake transactions in securities in which UBS makes a market or otherwise has other direct or indirect interests.

UBS conducts extensive broker-dealer, banking and other activities around the world and provides investment banking, broker-dealer, prime brokerage, administrative and other services to clients which may involve markets and securities in which the Funds invest. These activities will give UBS broad access to the current status of certain markets and investments. As a result of the activities described in this paragraph and the access and knowledge arising from those activities, parts of UBS may be in possession of information in respect of markets and invest-

¹ UBS AM (Americas) manages approximately $171 billion as of June 30, 2018.

ments, which, if known to UBS AM (Americas), might cause UBS AM (Americas) to seek to dispose of, retain or increase interests in investments held by the Fund or acquire certain positions on behalf of the Fund. UBS will be under no duty to make any such information available to the Fund or personnel of UBS AM (Americas) making investment decisions on behalf of the Fund and maintains information barriers designed to prevent the misuse of such information. In general, personnel of UBS AM (Americas) making investment decisions will make decisions based solely upon information known by such decision makers without regard to information known by other UBS personnel.

In conformance with the Funds' investment objective and subject to compliance with applicable law, UBS AM (Americas) may purchase securities for the Funds during an underwriting or other offering of securities in which a broker-dealer affiliate acts as a manager, co-manager, underwriter or placement agent, or receives a benefit in the form of management, underwriting, or other fees. Affiliates of UBS AM (Americas) may act in other capacities in such offerings for which a fee, compensation, or other benefit will be received. From time to time, affiliates of UBS AM (Americas) will be current investors in companies engaged in an offering of securities which UBS AM (Americas) may purchase on behalf of its clients. Such purchases may provide a direct or indirect benefit to UBS AM's affiliates acting as a selling shareholder. UBS AM may also participate in structured fixed income offerings of securities in which a related person may serve as trustee, depositor, originator service agent or other service provider in which fees will be paid to such related person. Further, a related person may act as originator and/or servicing agent of loans or receivables for a structured fixed income offering in which UBS AM (Americas) may invest Fund assets. Participation in such offering may directly or indirectly relieve financial obligations of related persons.

UBS AM may purchase or sell, or recommend for purchase or sale, for its investment advisory clients securities of companies: (i) with respect to which its affiliates act as an investment banker or financial advisor; (ii) with which its affiliates have other confidential relationships; (iii) in which its affiliates maintain a position or (iv) for which its affiliates make a market; or in which it or its officers, directors or employees or those of its affiliates own securities or otherwise have an interest. Except to the extent prohibited by law or regulation or by client instruction, UBS AM may recommend to its clients, or purchase for its clients, securities of issuers in which UBS has an interest as described in this paragraph.

UBS' financial and other interests and relationships may incentivize UBS to promote the sale of Fund shares. UBS, its personnel and other financial service providers, have interests in promoting sales of the Funds. UBS AM may also make cash and non-cash payments to banks, broker-dealers, insurance companies, financial planning firms and other financial intermediaries, that sell shares of the Funds, subject to UBS AM's internal policies and procedures. The source of such payments may come from sales charges on such shares, 12b-1 fees collected from a Fund and/or from the underwriter's own resources (including through transfers from affiliates). Payments made out of the underwriter's own resources are often referred to as "revenue sharing." Please read the section entitled "Principal underwriting arrangements" for more information.

With respect to both UBS and its personnel, the remuneration and profitability relating to services to and sales of the Funds or other products may be greater than the remuneration and profitability relating to services to and sales of other products that might be provided or offered by UBS or other third parties. UBS and its sales personnel may directly or indirectly receive a portion of the fees and commissions charged to the Funds or its shareholders. UBS and its advisory or other personnel may also benefit from increased amounts of assets under management. Fees and commissions charged to the Funds may also be higher than for other products or services, and the remuneration and profitability to UBS and such personnel resulting from transactions on behalf of or management of the Funds may be greater than the remuneration and profitability resulting from similar transactions for other funds or products.

UBS also may have relationships with, and purchase, or distribute or sell, services or products from or to, distributors, consultants and others who recommend the Funds, or who engage in transactions with or for the Funds. For

example, UBS regularly participates in industry and consultant sponsored conferences and may purchase educational, data or other services from consultants or other third parties that it deems to be of value to its personnel and its business. The products and services purchased from consultants may include, but are not limited to, those that help UBS understand the consultant's points of view on the investment management process. Consultants and other parties that provide consulting or other services to potential investors in the Funds may receive fees from UBS or the Funds in connection with the distribution of shares in the Funds or other UBS products. For example, UBS may enter into revenue or fee sharing arrangements with consultants, service providers, and other intermediaries relating to investments in mutual funds, collective trusts, or other products or services offered or managed by UBS AM. UBS may also pay a fee for membership in industry-wide or state and municipal organizations or otherwise help sponsor conferences and educational forums for investment industry participants including, but not limited to, trustees, fiduciaries, consultants, administrators, state and municipal personnel and other clients. UBS' membership in such organizations allows UBS to participate in these conferences and educational forums and helps UBS interact with conference participants and to develop an understanding of the points of view and challenges of the conference participants. In addition, UBS' personnel, including employees of UBS, may have board, advisory, brokerage or other relationships with issuers, distributors, consultants and others that may have investments in the Funds or that may recommend investments in the Funds. In addition, UBS, including UBS AM, may make charitable contributions to institutions, including those that have relationships with clients or personnel of clients. UBS' personnel may also make political contributions. As a result of the relationships and arrangements described in this paragraph, consultants, distributors and other parties may have conflicts associated with their promotion of the Funds or other dealings with the Funds that create incentives for them to promote the Funds or certain portfolio transactions.

To the extent permitted by applicable law, UBS AM may make payments to authorized dealers and other financial intermediaries ("Intermediaries") from time to time to promote the Funds. The additional payments by UBS AM may also compensate Intermediaries for subaccounting, administrative and/or shareholder processing services that are in addition to the fees paid for these or similar services by such products. Payments made by UBS AM may vary between different Intermediaries. Please read the section entitled "Principal underwriting arrangements" and "Reduced sales charges, additional purchase, exchange and redemption information and other services—Additional compensation to affiliated dealer" for more information.

Potential conflicts relating to the allocation of investment opportunities among the Funds and other UBS accounts. UBS AM manages accounts of certain clients by means of separate accounts ("Separate Accounts"). With respect to the Funds, UBS AM (Americas) may follow a strategy that is expected to be similar over time to that delivered by the Separate Accounts. The Funds and the Separate Account Clients are subject to independent management and, given the independence in the implementation of advice to these accounts, there can be no assurance that such investment advice will be implemented simultaneously. While each will use reasonable endeavors to procure timely execution, it is possible that prior execution for or on behalf of the Separate Accounts could adversely affect the prices and availability of the securities, currencies and instruments in which the Funds invest.

Other potential conflicts relating to the management of the Funds by UBS AM

Potential restrictions and issues relating to information held by UBS. From time to time and subject to UBS AM's policies and procedures regarding information barriers, UBS AM may consult with personnel in other areas of UBS, or with persons unaffiliated with UBS. The performance by such persons of obligations related to their consultation with personnel of UBS AM could conflict with their areas of primary responsibility within UBS or elsewhere. There will be no obligation on the part of such persons to make available for use by the Funds any information or strategies known to them or developed in connection with their own client, proprietary or other activities. In addition, UBS will be under no obligation to make available any research or analysis prior to its public dissemination.

In connection with its management of the Funds, UBS AM may have access to certain fundamental analysis and proprietary technical models developed by UBS AM or its affiliates (including UBS). UBS AM will not be under any obligation, however, to effect transactions on behalf of the Fund in accordance with such analysis and models. In

addition, neither UBS AM nor any of its affiliates (including UBS) will have any obligation to make available any information regarding their proprietary activities or strategies, or the activities or strategies used for other accounts managed by them, for the benefit of the management of the Funds and it is not anticipated that UBS AM will have access to such information for the purpose of managing the Funds. The proprietary activities or portfolio strategies of UBS AM and its affiliates (including UBS) or the activities or strategies used for accounts managed by them or other client accounts could conflict with the transactions and strategies employed by UBS AM (Americas), and have adverse effects on the Funds.

Potential conflicts relating to UBS' and UBS AM's proprietary activities and activities on behalf of other accounts. Transactions undertaken by UBS or client accounts managed by UBS ("Client Accounts") may adversely impact the Funds. UBS and one or more Client Accounts may buy or sell positions while the Funds are undertaking the same or a differing, including potentially opposite, strategy, which could disadvantage the Funds. For example, a Fund may establish a short position in a security and UBS or other Client Accounts may buy that same security. The subsequent purchase may result in an increase of the price of the underlying position in the short sale exposure of the Fund and such increase in price would be to the Fund's detriment. Conversely, a Fund may buy a security and UBS or Client Accounts may establish a short position in that same security. The subsequent short sale may result in impairment of the price of the security that the Fund holds. Conflicts may also arise because portfolio decisions regarding a Fund may benefit UBS or other Client Accounts. For example, the sale of a long position or establishment of a short position by a Fund may impair the price of the same security sold short by (and therefore benefit) UBS or other Client Accounts, and the purchase of a security or covering of a short position in a security by a Fund may increase the price of the same security held by (and therefore benefit) UBS or other Client Accounts.

The directors, officers and employees of UBS and UBS AM may buy and sell securities or other investments for their own accounts or for seed capital accounts (including through investment funds managed by UBS and UBS AM). As a result of differing trading and investment strategies or constraints, positions may be taken by directors, officers and employees that are the same, different from or made at different times than positions taken for the Funds. To reduce the possibility that the Funds will be materially adversely affected by the personal or proprietary trading described above, each of the Funds, UBS and UBS AM, has established policies and procedures that restrict securities trading in the personal accounts of investment professionals and others who normally come into possession of information regarding the Fund's portfolio transactions. Please see the section entitled "Personal trading policies" for more detailed information regarding these policies and procedures.

UBS Asset Management's affiliates have direct or indirect interests in electronic communication networks and alternative trading systems (collectively "ECNs"). UBS Asset Management, in accordance with its fiduciary obligation to seek to obtain best execution, may execute client trades through ECNs in which our related persons have, or may acquire, an interest. A related person may receive compensation based upon its ownership percentage in relation to the transaction fees charged by the ECNs. UBS Asset Management will execute through an ECN in which a related person has an interest only in situations when we reasonably believe such transactions will be in the best interests of our clients and the requirements of applicable law have been satisfied.

In accordance with Section 11(a) of the 1934 Act, and the rules thereunder, UBS Asset Management's affiliates may effect transactions for Fund or advisory client accounts on a national securities exchange of which an affiliate is an equity owner and/or a member and may retain compensation in connection with those transactions.

would unfairly disadvantage any of UBS AM's clients. In addition, many of UBS AM's strategies are managed on a model basis, meaning the portfolio managers manage a model for the strategy and translation of the models into individual client portfolios is handled by multiple other functions within UBS AM. This division of labor imparts checks and balances into the portfolio management process that minimizes the potential for one account to be favored over another. UBS AM's performance measurement team and compliance personnel monitor for dispersion of investment performance among similarly managed accounts to confirm that no accounts are being favored. UBS AM has established a trade allocation policy designed to ensure fair and equitable allocation of investments among client accounts. Additionally, portfolio holdings, position sizes and industry and sector exposures tend to be similar across accounts, which may minimize the potential for conflicts of interests.

Gifts and entertainment. From time to time, directors, officers and employees of UBS and UBS AM may receive gifts and/or entertainment from clients, intermediaries, or service providers to the Funds, UBS and UBS AM, which could have the appearance of affecting or may potentially affect the judgment of the directors, officers and employees or the manner in which they conduct business on behalf of the Funds, UBS and UBS AM. To reduce the appearance of impropriety and the possibility that the Funds may be materially adversely affected by such gifts and entertainment, UBS and UBS AM have established policies and procedures that restrict the receipt of gifts and entertainment from clients, intermediaries, or service providers to the Funds.

UBS may in-source or outsource. Subject to applicable law, UBS, including UBS AM, may from time to time and without notice to investors in-source or outsource certain processes or functions in connection with a variety of services that it provides to the Funds in its administrative or other capacities. Such in-sourcing or outsourcing may give rise to additional conflicts of interest.

Selection of brokers and dealers and commission rates. UBS Asset Management and our affiliates utilize a common portfolio and trading platform for its clients. Certain investment professionals and other employees of UBS AM are officers of advisory affiliates and related persons and may provide investment advisory services to clients of such affiliated entities. UBS AM's personnel also provide research and trading support to personnel of certain advisory affiliates. Research-related costs may be shared by advisory affiliates and related persons and may benefit the clients of such advisory affiliates. Since research services are shared between UBS AM and its advisory affiliates, UBS AM and its advisory affiliates maintain an aggregated soft dollar budget. Therefore, research services that benefit UBS AM's clients may be paid for with commissions generated by clients of its advisory affiliates. Similarly, research services paid for by commissions generated by UBS AM's clients may benefit advisory affiliates and their clients. UBS AM does not allocate the relative costs or benefits of research received from brokers or dealers among its clients because UBS AM believes that the research received is, in the aggregate, of assistance in fulfilling UBS AM's overall responsibilities to its clients. The research may be used in connection with the management of accounts other than those for which trades are executed by the brokers or dealers providing the research. For example, equity research may be used for fixed income funds and accounts.

While we select brokers primarily on the basis of the execution capabilities, UBS Asset Management, in its discretion, may cause a client to pay a commission to brokers or dealers for effecting a transaction for that client in excess of the amount another broker or dealer would have charged for effecting that transaction. This may be done when we have determined in good faith that the commission is reasonable in relation to the value of the execution, brokerage and/or research services provided by the broker. Our arrangements for the receipt of research services from brokers may create conflicts of interest, in that we have an incentive to choose a broker or dealer that provides research services, instead of one that charges a lower commission rate but does not provide any research.

management responsibilities with respect to the various accounts over which we exercise investment discretion or otherwise provide investment advice. These topics include: issuers, industries, securities, economic factors and trends, portfolio strategy, the performance of accounts, statistical information, market data, earnings estimates, credit analysis, pricing, risk measurement analysis, and other information that may affect the US or foreign economies, security prices, or management of the portfolio.

The research services may include written reports, pricing and appraisal services, market data services, analysis of issues raised in proxy statements, educational seminars, subscriptions to trade journals, portfolio attribution and monitoring services and computer software and access charges that are directly related to investment research. Research services may be received in the form of written reports, online services, telephone contacts and personal meetings with security analysts, economists, corporate and industry spokespersons, investment consultants and government representatives. Research services are either provided directly by broker-dealers or generated by third parties and are provided by the brokerage firm to which the commissions are paid including commission sharing arrangements.

Certain services may be mixed use, or used for research purposes as well as other purposes. Payment for these services is made as follows: the portion allocated to research is paid for through commissions, and the portion allocated to other purposes is paid for by UBS Asset Management. This allocation is determined by our Best Execution and Trading Committee in good faith and based on objective criteria, to the extent available, of the amounts used for research and non-research purposes; however, the decision regarding what amounts are paid by UBS Asset Management versus paid by clients through commissions presents a conflict of interest. Research services received from brokers and dealers may be supplemental to our own research efforts and, when utilized, are subject to internal analysis before being incorporated into our investment process. As a practical matter, it would not be possible for UBS Asset Management to generate all of the information presently provided by brokers and dealers.

UBS Asset Management may receive in-house or proprietary research from dealers that execute trades on a principal basis for our clients. The research received will be of the type described above, excluding third-party research services.

Potential regulatory restrictions on investment advisor activity. From time to time, the activities of a Fund may be restricted because of regulatory requirements applicable to UBS and/or its internal policies designed to comply with, limit the applicability of, or otherwise relate to such requirements. A client not advised by UBS would not be subject to some of those considerations. There may be periods when UBS AM may not initiate or recommend certain types of transactions, or may otherwise restrict or limit its advice with respect to certain securities or instruments issued by or related to companies for which UBS is performing investment banking, market making or other services or has proprietary positions or otherwise has come into possession of material inside information. For example, when UBS is engaged in an underwriting or other distribution of securities of, or advisory services for, a company, the Funds may be prohibited from or limited in purchasing or selling securities of that company. Similar situations could arise if UBS personnel serve as directors of companies the securities of which the Funds wish to purchase or sell. The larger UBS AM's investment advisory business and UBS' businesses, the larger the potential that these restricted list policies will impact investment transactions. However, if permitted by applicable law, the Funds may purchase securities or instruments that are issued by such companies or are the subject of an underwriting, distribution, or advisory assignment by UBS, or in cases in which UBS personnel are directors or officers of the issuer.

The investment activities of UBS for its proprietary accounts and for Client Accounts may also limit the investment strategies and rights of the Funds. For example, in regulated industries, in certain emerging or international markets, in corporate and regulatory ownership definitions, and in certain futures and derivative transactions, there may be limits on the aggregate amount of investment by affiliated investors that may not be exceeded without the grant of a license or other regulatory or corporate consent or, if exceeded, may cause UBS, the Fund or other Client Accounts to suffer disadvantages or business restrictions. If certain aggregate ownership thresholds are reached or

certain transactions undertaken, the ability of UBS AM on behalf of the Funds to purchase or dispose of investments, or exercise rights or undertake business transactions, may be restricted by regulation or otherwise impaired. As a result, UBS AM on behalf of the Funds may limit purchases, sell existing investments, or otherwise restrict or limit the exercise of rights (including voting rights) when UBS AM, in its sole discretion, deems it appropriate.

UBS AM and its affiliates, including, without limitation, UBS and its advisory affiliates, have proprietary interests in, and may manage or advise with respect to, accounts or funds (including separate accounts, other funds and collective investment vehicles) that have investment objectives similar to those of a Fund and/or that engage in transactions in the same types of securities, currencies and instruments as the Fund. UBS and its affiliates are also major participants in the global currency, equities, swap and fixed income markets, in each case both on a proprietary basis and for the accounts of customers. As such, UBS and its affiliates may be actively engaged in transactions in the same securities, currencies, and instruments in which a Fund invests. Such activities could affect the prices and availability of the securities, currencies, and instruments in which a Fund invests, which could have an adverse impact on the Fund's performance. Such transactions, particularly in respect of most proprietary accounts or client accounts, will be executed independently of a Fund's transactions and thus at prices or rates that may be more or less favorable than those obtained by the Fund. UBS AM has developed policies and procedures consistent with regulatory requirements that provide that it will allocate investment opportunities and make purchase and sale decisions among the Funds and other client accounts in a manner that it considers, in its sole discretion and consistent with its fiduciary obligation to each account, to be reasonable. Allocations may be based on numerous factors and may not always be pro rata based. Thus, this system may adversely affect the size or price of the assets purchased or sold for a Fund.

The results of a Fund's investment activities may differ significantly from the results achieved by UBS AM and its affiliates for their proprietary accounts or other accounts (including investment companies or collective investment vehicles) managed or advised by them. It is possible that UBS AM and its affiliates and such other accounts will achieve investment results that are substantially more or less favorable than the results achieved by a Fund. Moreover, it is possible that a Fund will sustain losses during periods in which UBS AM and its affiliates achieve significant profits on their trading for proprietary or other accounts. The opposite result is also possible.

The investment activities of UBS AM and its affiliates for their proprietary accounts and accounts under their management may also limit the investment opportunities for a Fund in certain emerging and other markets in which limitations are imposed upon the amount of investment, in the aggregate or in individual issuers, by affiliated foreign investors.

From time to time, a Fund's activities may also be restricted because of regulatory restrictions applicable to UBS AM and its affiliates, and/or their internal policies designed to comply with such restrictions. As a result, there may be periods, for example, when UBS AM, and/or its affiliates, will not initiate or recommend certain types of transactions in certain securities or instruments with respect to which UBS AM and/or its affiliates are performing services or when position limits have been reached where such securities or instruments otherwise would have been permissible investments for a Fund. Additionally, certain Funds or certain accounts may be licensed to trade securities or engage in transactions in certain jurisdictions while other Funds and accounts are not licensed.

In addition, certain officers and certain employees of UBS AM are also officers or employees of UBS, or its affiliated entities. As a result, the performance by these officers and employees of their obligations to such other entities may be a consideration of which investors in a Fund should be aware.

UBS AM may enter into transactions and invest in securities, instruments and currencies on behalf of a Fund where customers of UBS or, to the extent permitted by the SEC, UBS itself, serves as the counterparty, principal or issuer. In such cases, such party's interests in the transaction will be adverse to the interests of the Fund, and such party may have no incentive to assure that the Fund obtains the best possible prices or terms in connection with the transac-

tion. In addition, the purchase, holding and sale of such investments by a Fund may enhance the profitability of UBS AM and/or UBS. UBS and its affiliates may also create, write or issue derivatives for customers of UBS or its affiliates, the underlying securities, currencies or instruments of which may be those in which a Fund invests or which may be based on the performance of the Fund. A Fund may, subject to applicable law, purchase investments that are the subject of an underwriting or other distribution by UBS or its affiliates and may also enter into transactions with other clients of UBS AM or its affiliates where such other clients have interests adverse to those of the Fund. At times, these activities may cause UBS AM or its affiliates to give advice to clients that may cause these clients to take actions adverse to the interests of the Fund. To the extent affiliated transactions are permitted, a Fund will deal with UBS AM, UBS and its affiliates on an arms-length basis. UBS AM or UBS may also have an ownership interest in certain trading or information systems used by a Fund. A Fund's use of such trading or information systems may enhance the profitability of UBS AM and its affiliates.

It is also possible that, from time to time, UBS AM or any of its affiliates may, although they are not required to, purchase and hold shares of a Fund. Increasing a Fund's assets may enhance investment flexibility and diversification and may contribute to economies of scale that tend to reduce the Fund's expense ratio. UBS AM and its affiliates reserve the right to redeem at any time some or all of the shares of a Fund acquired for their own accounts. A large redemption of shares of a Fund by UBS AM or its affiliates could significantly reduce the asset size of the Fund, which might have an adverse effect on the Fund's investment flexibility, portfolio diversification, expense ratio and may result in significant transaction costs. UBS AM will consider the effect of redemptions on a Fund and other shareholders in deciding whether and when to redeem its shares.

It is possible that a Fund may invest in securities of companies with which UBS has or is trying to develop investment banking relationships as well as securities of entities in which UBS AM or UBS has significant debt or equity investments or in which UBS makes a market. A Fund also may invest in securities of companies to which UBS AM or UBS provides or may someday provide research coverage. Such investments could cause conflicts between the interests of a Fund and the interests of other UBS AM or UBS clients. In making investment decisions for a Fund, UBS AM is not permitted to obtain or use material non-public information acquired by any division, department or affiliate of UBS AM in the course of these activities. In addition, from time to time, UBS' activities may limit a Fund's flexibility in purchases and sales of securities. When UBS is engaged in an underwriting or other distribution of securities of an entity, UBS AM may be prohibited from purchasing or recommending the purchase of certain securities of that entity for a Fund.

Present and future activities of UBS AM and its affiliates, in addition to those described in this section, may give rise to additional conflicts of interest.

UBS AM (Americas) may buy for the Funds securities or obligations of issuers in which UBS or other funds or accounts have made, or are making, an investment in securities or obligations that are subordinate or senior to securities of the Funds. For example, a Fund may invest in debt securities of an issuer at the same time that UBS or other funds or accounts are investing, or currently have an investment, in equity securities of the same issuer. To the extent that the issuer experiences financial or operational challenges which may impact the price of its securities and its ability to meet its obligations, decisions by UBS (including UBS AM (Americas)) relating to what actions to be taken may also raise conflicts of interests and UBS may take actions for certain accounts that have negative impacts on other advisory accounts.

While UBS AM (Americas) will make proxy voting decisions as it believes appropriate and in accordance with UBS AM's policies designed to help avoid conflicts of interest, proxy voting decisions made by UBS AM (Americas) with respect to a Fund's portfolio securities may have the effect of favoring the interests of other clients or businesses of other divisions or units of UBS. UBS AM's proxy voting policy is discussed in more detail in the section entitled "Proxy voting policies."

As a registered investment advisor under the Advisers Act, UBS AM (Americas) is required to file a Form ADV with the SEC. Form ADV Part 2A contains information about assets under management, types of fee arrangements, types of investments, potential conflicts of interest, and other relevant information regarding UBS AM (Americas). A copy of Part 1A and 2A of UBS AM (Americas)'s Form ADV is available on the SEC's website (www.adviserinfo.sec.gov).

Performance calculations

From time to time, performance information, such as yield or total return, may be quoted in advertisements or in communications to present or prospective shareholders. Performance quotations represent the Funds' past performance and should not be considered as representative of future results. The current yield will be calculated by dividing the net investment income earned per share by a Fund during the period stated in the advertisement (based on the average daily number of shares entitled to receive dividends outstanding during the period) by the maximum net asset value per share on the last day of the period and annualizing the result on a semiannual compounded basis. The Funds' total return may be calculated on an annualized and aggregate basis for various periods (which periods will be stated in the advertisement). Average annual return reflects the average percentage change per year in value of an investment in a Fund. Aggregate total return reflects the total percentage change over the stated period.

To help investors better evaluate how an investment in the Funds might satisfy their investment objectives, advertisements regarding the Funds may discuss yield or total return as reported by various financial publications. Advertisements may also compare yield or total return to other investments, indices and averages. The following publications, benchmarks, indices and averages may be used: Lipper Mutual Fund Performance Analysis; Lipper Fixed Income Analysis; Lipper Mutual Fund Indices; Morgan Stanley Capital International Indices; Bloomberg Barclays Indices; Citigroup Indices; JPMorgan Indices; Bank of America Merrill Lynch Indices; Dow Jones Composite Average or its component indices; Standard & Poor's 500 Stock Index or its component indices; Russell Indices; Wilshire Indices; The New York Stock Exchange composite or component indices; CDA Mutual Fund Report; Weisenberger-Mutual Funds Panorama and Investment Companies; Mutual Fund Values and Mutual Fund Service Book, published by Morningstar, Inc.; comparable portfolios managed by the Advisor; and financial publications, such as Business Week, Kiplinger's Personal Finance, Financial World, Forbes, Fortune, Money Magazine, The Wall Street Journal, Barron's et al., which rate fund performance over various time periods.

The principal value of an investment in the Funds will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Any fees charged by banks or other institutional investors directly to their customer accounts in connection with investments in shares of the Funds will not be included in the Funds' calculations of yield or total return.

Performance information for the various classes of shares of each Fund will vary due to the effect of expense ratios on the performance calculations.

Securities lending

The Board has approved each Fund's participation in a securities lending program. State Street serves as the securities lending agent for each Fund. Because the Funds have not yet commenced operation as of the end of the most recent fiscal year, they have not participated in the securities lending program during their most recent fiscal year.

Financial statements and report of independent registered public accounting firm

Because the Funds had not commenced operations as of the date of this SAI, financial statements were not yet available for the Funds.

Appendix A—Debt ratings

Corporate debt ratings

Moody's Investors Service, Inc. ("Moody's") Global Long-Term Ratings:

Moody's long-term ratings are assigned to issuers or obligations with an original maturity of one year or more and reflect both on the likelihood of a default on contractually promised payments and the expected financial loss suffered in the event of default.

Aaa. Obligations rated Aaa are judged to be of the highest quality, subject to the lowest level of credit risk.

Aa. Obligations rated Aa are judged to be of high quality and are subject to very low credit risk.

A. Obligations rated A are judged to be upper-medium grade and are subject to low credit risk.

Baa. Obligations rated Baa are judged to be medium-grade and subject to moderate credit risk and as such may possess certain speculative characteristics.

Ba. Obligations rated Ba are judged to be speculative and are subject to substantial credit risk.

B. Obligations rated B are considered speculative and are subject to high credit risk.

Caa. Obligations rated Caa are judged to be speculative of poor standing and are subject to very high credit risk.

Ca. Obligations rated Ca are highly speculative and are likely in, or very near, default, with some prospect of recovery of principal and interest.

C. Obligations rated C are the lowest rated and are typically in default, with little prospect for recovery of principal or interest.

Note: Moody's appends numerical modifiers 1, 2, and 3 to each generic rating classification from Aa through Caa. The modifier 1 indicates that the obligation ranks in the higher end of its generic rating category; the modifier 2 indicates a mid-range ranking; and the modifier 3 indicates a ranking in the lower end of that generic rating category. Additionally, a "(hyb)" indicator is appended to all ratings of hybrid securities issued by banks, insurers, finance companies, and securities firms.

• By their terms, hybrid securities allow for the omission of scheduled dividends, interest, or principal payments, which can potentially result in impairment if such an omission occurs. Hybrid securities may also be subject to contractually allowable write-downs of principal that could result in impairment. Together with the hybrid indicator, the long-term obligation rating assigned to a hybrid security is an expression of the relative credit risk associated with that security.

Standard & Poor's Financial Services LLC ("S&P Global Ratings") Long-Term Issue Credit Ratings:

Issue credit ratings are based, in varying degrees, on S&P Global Ratings' analysis of the following considerations:

• The likelihood of payment—the capacity and willingness of the obligor to meet its financial commitments on an obligation in accordance with the terms of the obligation;

• The nature and provisions of the financial obligation, and the promise we impute; and

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• The protection afforded by, and relative position of, the financial obligation in the event of a bankruptcy, reorganization, or other arrangement under the laws of bankruptcy and other laws affecting creditors' rights.

An issue rating is an assessment of default risk, but may incorporate an assessment of relative seniority or ultimate recovery in the event of default. Junior obligations are typically rated lower than senior obligations, to reflect the lower priority in bankruptcy, as noted above. (Such differentiation may apply when an entity has both senior and subordinated obligations, secured and unsecured obligations, or operating company and holding company obligations.)

AAA. An obligation rated AAA has the highest rating assigned by S&P Global Ratings. The obligor's capacity to meet its financial commitments on the obligation is extremely strong.

AA. An obligation rated AA differs from the highest-rated obligations only to a small degree. The obligor's capacity to meet its financial commitments on the obligation is very strong.

A. An obligation rated A is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher-rated categories. However, the obligor's capacity to meet its financial commitments on the obligation is still strong.

BBB. An obligation rated BBB exhibits adequate protection parameters. However, adverse economic conditions or changing circumstances are more likely to weaken the obligor's capacity to meet its financial commitments on the obligation.

BB, B, CCC, CC, and C. Obligations rated BB, B, CCC, CC, and C are regarded as having significant speculative characteristics. BB indicates the least degree of speculation and C the highest. While such obligations will likely have some quality and protective characteristics, these may be outweighed by large uncertainties or major exposures to adverse conditions.

BB. An obligation rated BB is less vulnerable to nonpayment than other speculative issues. However, it faces major ongoing uncertainties or exposure to adverse business, financial, or economic conditions that could lead to the obligor's inadequate capacity to meet its financial commitments on the obligation.

B. An obligation rated B is more vulnerable to nonpayment than obligations rated BB, but the obligor currently has the capacity to meet its financial commitments on the obligation. Adverse business, financial, or economic conditions will likely impair the obligor's capacity or willingness to meet its financial commitments on the obligation.

CCC. An obligation rated CCC is currently vulnerable to nonpayment and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitments on the obligation. In the event of adverse business, financial, or economic conditions, the obligor is not likely to have the capacity to meet its financial commitments on the obligation.

CC. An obligation rated CC is currently highly vulnerable to nonpayment. The CC rating is used when a default has not yet occurred, but S&P Global Ratings expects default to be a virtual certainty, regardless of the anticipated time to default.

C. An obligation rated C is currently highly vulnerable to nonpayment, and the obligation is expected to have lower relative seniority or lower ultimate recovery compared with obligations that are rated higher.

D. An obligation rated D is in default or in breach of an imputed promise. For non-hybrid capital instruments, the D rating category is used when payments on an obligation are not made on the date due, unless S&P Global

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Ratings believes that such payments will be made within five business days in the absence of a stated grace period or within the earlier of the stated grace period or 30 calendar days. The D rating also will be used upon the filing of a bankruptcy petition or the taking of similar action and where default on an obligation is a virtual certainty, for example due to automatic stay provisions. An obligation's rating is lowered to D if it is subject to a distressed exchange offer.

The ratings from AA to CCC may be modified by the addition of a plus (+) or minus (-) sign to show relative standing within the major rating categories.

Fitch Ratings, Inc. ("Fitch Ratings") Long-Term Issuer Credit Ratings:

Rated entities in a number of sectors, including financial and non-financial corporations, sovereigns, insurance companies and certain sectors within public finance, are generally assigned Issuer Default Ratings ("IDRs"). IDRs are also assigned to certain entities or enterprises in global infrastructure, project finance and public finance. IDRs opine on an entity's relative vulnerability to default (including by way of a distressed debt exchange) on financial obligations. The "threshold" default risk addressed by the IDR is generally that of the financial obligations whose non-payment would best reflect the uncured failure of that entity. As such, IDRs also address relative vulnerability to bankruptcy, administrative receivership or similar concepts.

In aggregate, IDRs provide an ordinal ranking of issuers based on the agency's view of their relative vulnerability to default, rather than a prediction of a specific percentage likelihood of default.

AAA. Highest credit quality. AAA ratings denote the lowest expectation of default risk. They are assigned only in cases of exceptionally strong capacity for payment of financial commitments. This capacity is highly unlikely to be adversely affected by foreseeable events.

AA. Very high credit quality. AA ratings denote expectations of very low default risk. They indicate very strong capacity for payment of financial commitments. This capacity is not significantly vulnerable to foreseeable events.

A. High credit quality. A ratings denote expectations of low default risk. The capacity for payment of financial commitments is considered strong. This capacity may, nevertheless, be more vulnerable to adverse business or economic conditions than is the case for higher ratings.

BBB. Good credit quality. BBB ratings indicate that expectations of default risk are currently low. The capacity for payment of financial commitments is considered adequate but adverse business or economic conditions are more likely to impair this capacity.

BB. Speculative. BB ratings indicate an elevated vulnerability to default risk, particularly in the event of adverse changes in business or economic conditions over time; however, business or financial flexibility exists that supports the servicing of financial commitments.

B. Highly speculative. B ratings indicate that material default risk is present, but a limited margin of safety remains. Financial commitments are currently being met; however, capacity for continued payment is vulnerable to deterioration in the business and economic environment.

CCC. Substantial credit risk. Default is a real possibility.

CC. Very high levels of credit risk. Default of some kind appears probable.

A-3

C. Near default. A default or default-like process has begun, or the issuer is in standstill, or for a closed funding vehicle, payment capacity is irrevocably impaired. Conditions that are indicative of a C category rating for an issuer include:

a. the issuer has entered into a grace or cure period following non-payment of a material financial obligation;

b. the issuer has entered into a temporary negotiated waiver or standstill agreement following a payment default on a material financial obligation; or

c. the formal announcement by the issuer or their agent of a distressed debt exchange;

d. a closed financing vehicle where payment capacity is irrevocably impaired such that it is not expected to pay interest and/or principal in full during the life of the transaction, but where no payment default is imminent.

RD. Restricted default. RD ratings indicate an issuer that in Fitch's opinion has experienced:

a. an uncured payment default or distressed debt exchange on a bond, loan or other material financial obligation, but

b. has not entered into bankruptcy filings, administration, receivership, liquidation or other formal winding-up procedure, and

c. has not otherwise ceased operating. This would include:

i. the selective payment default on a specific class or currency of debt;

ii. the uncured expiry of any applicable grace period, cure period or default forbearance period following a payment default on a bank loan, capital markets security or other material financial obligation;

iii. the extension of multiple waivers or forbearance periods upon a payment default on one or more material financial obligations, either in series or in parallel; ordinary execution of a distressed debt exchange on one or more material financial obligations.

D. Default. D ratings indicate an issuer that in Fitch's opinion has entered into bankruptcy filings, administration, receivership, liquidation or other formal winding-up procedure or that has otherwise ceased business.

Default ratings are not assigned prospectively to entities or their obligations; within this context, non-payment on an instrument that contains a deferral feature or grace period will generally not be considered a default until after the expiration of the deferral or grace period, unless a default is otherwise driven by bankruptcy or other similar circumstance, or by a distressed debt exchange.

In all cases, the assignment of a default rating reflects the agency's opinion as to the most appropriate rating category consistent with the rest of its universe of ratings, and may differ from the definition of default under the terms of an issuer's financial obligations or local commercial practice.

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Moody's Global Short-Term Ratings:

Moody's short-term ratings are assigned to obligations with an original maturity of thirteen months or less and reflect both on the likelihood of a default on contractually promised payments and the expected financial loss suffered in the event of default.

P-1. Issuers (or supporting institutions) rated Prime-1 have a superior ability to repay short-term debt obligations.

P-2. Issuers (or supporting institutions) rated Prime-2 have a strong ability to repay short-term debt obligations.

P-3. Issuers (or supporting institutions) rated Prime-3 have an acceptable ability to repay short-term obligations.

NP. Issuers (or supporting institutions) rated Not Prime do not fall within any of the Prime rating categories.

Moody's US Municipal Short-Term Debt and Demand Obligation Ratings:

SHORT-TERM OBLIGATION RATINGS

The Municipal Investment Grade ("MIG") scale is used to rate US municipal bond anticipation notes of up to three years maturity. Municipal notes rated on the MIG scale may be secured by either pledged revenues or proceeds of a take-out financing received prior to note maturity. MIG ratings expire at the maturity of the obligation, and the issuer's long-term rating is only one consideration in assigning the MIG rating. MIG ratings are divided into three levels—MIG 1 through MIG 3—while speculative grade short-term obligations are designated SG.

MIG 1. This designation denotes superior credit quality. Excellent protection is afforded by established cash flows, highly reliable liquidity support, or demonstrated broad-based access to the market for refinancing.

MIG 2. This designation denotes strong credit quality. Margins of protection are ample, although not as large as in the preceding group.

MIG 3. This designation denotes acceptable credit quality. Liquidity and cash-flow protection may be narrow, and market access for refinancing is likely to be less well-established.

SG. This designation denotes speculative-grade credit quality. Debt instruments in this category may lack sufficient margins of protection.

DEMAND OBLIGATION RATINGS

In the case of variable rate demand obligations ("VRDOs"), a two-component rating is assigned; a long or short-term debt rating and a demand obligation rating. The first element represents Moody's evaluation of risk associated with scheduled principal and interest payments. The second element represents Moody's evaluation of risk associated with the ability to receive purchase price upon demand ("demand feature"). The second element uses a rating from a variation of the MIG scale called the Variable Municipal Investment Grade ("VMIG") scale. VMIG ratings of demand obligations with unconditional liquidity support are mapped from the short-term debt rating (or counterparty assessment) of the support provider, or the underlying obligor in the absence of third party liquidity support, with VMIG 1 corresponding to P-1, VMIG 2 to P-2, VMIG 3 to P-3 and SG to not prime. For example, the VMIG rating for an industrial revenue bond with Company XYZ as the underlying obligor would normally have the same numerical modifier as Company XYZ's prime rating. Transitions of VMIG ratings of demand obligations with conditional liquidity support differ from transitions on the Prime scale to reflect the risk that external liquidity support will terminate if the issuer's long-term rating drops below investment grade.

VMIG 1. This designation denotes superior credit quality. Excellent protection is afforded by the superior short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

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VMIG 2. This designation denotes strong credit quality. Good protection is afforded by the strong short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

VMIG 3. This designation denotes acceptable credit quality. Adequate protection is afforded by the satisfactory short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

SG. This designation denotes speculative-grade credit quality. Demand features rated in this category may be supported by a liquidity provider that does not have an investment grade short-term rating or may lack the structural and/or legal protections necessary to ensure the timely payment of purchase price upon demand.

S&P Global Ratings' Short-Term Issue Credit Ratings:

Short-term ratings are generally assigned to those obligations considered short-term in the relevant market. Short-term ratings are also used to indicate the creditworthiness of an obligor with respect to put features on long-term obligations. Medium-term notes are assigned long-term ratings.

A-1. A short-term obligation rated A-1 is rated in the highest category by S&P Global Ratings. The obligor's capacity to meet its financial commitments on the obligation is strong. Within this category, certain obligations are designated with a plus sign (+). This indicates that the obligor's capacity to meet its financial commitments on these obligations is extremely strong.

A-2. A short-term obligation rated A-2 is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher rating categories. However, the obligor's capacity to meet its financial commitments on the obligation is satisfactory.

A-3. A short-term obligation rated A-3 exhibits adequate protection parameters. However, adverse economic conditions or changing circumstances are more likely to weaken an obligor's capacity to meet its financial commitments on the obligation.

B. A short-term obligation rated B is regarded as vulnerable and has significant speculative characteristics. The obligor currently has the capacity to meet its financial commitments; however, it faces major ongoing uncertainties that could lead to the obligor's inadequate capacity to meet its financial commitments.

C. A short-term obligation rated C is currently vulnerable to nonpayment and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitments on the obligation.

D. A short-term obligation rated D is in default or in breach of an imputed promise. For non-hybrid capital instruments, the D rating category is used when payments on an obligation are not made on the date due, unless S&P Global Ratings believes that such payments will be made within any stated grace period. However, any stated grace period longer than five business days will be treated as five business days. The D rating also will be used upon the filing of a bankruptcy petition or the taking of a similar action and where default on an obligation is a virtual certainty, for example due to automatic stay provisions. An obligation's rating is lowered to D if it is subject to a distressed exchange offer.

Fitch Short-Term Issuer Credit Ratings:

A short-term issuer or obligation rating is based in all cases on the short-term vulnerability to default of the rated entity and relates to the capacity to meet financial obligations in accordance with the documentation governing the relevant obligation. Short-term deposit ratings may be adjusted for loss severity. Short-Term Ratings are assigned to obligations whose initial maturity is viewed as short term based on market convention. Typically, this means up to

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13 months for corporate, sovereign, and structured obligations, and up to 36 months for obligations in US public finance markets.

F1: Highest short-term credit quality. Indicates the strongest intrinsic capacity for timely payment of financial commitments; may have an added "+" to denote any exceptionally strong credit feature.

F2: Good short-term credit quality. Good intrinsic capacity for timely payment of financial commitments.

F3: Fair short-term credit quality. The intrinsic capacity for timely payment of financial commitments is adequate.

B: Speculative short-term credit quality. Minimal capacity for timely payment of financial commitments, plus heightened vulnerability to near term adverse changes in financial and economic conditions.

C: High short-term default risk. Default is a real possibility.

RD: Restricted default. Indicates an entity that has defaulted on one or more of its financial commitments, although it continues to meet other financial obligations. Typically applicable to entity ratings only.

D: Default. Indicates a broad-based default event for an entity, or the default of a short-term obligation.

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You should rely only on the information contained or referred to in the Prospectus and this Statement of Additional Information. The Funds and their principal underwriter have not authorized anyone to provide you with information that is different. The Prospectus and this Statement of Additional Information are not an offer to sell shares of the Funds in any jurisdiction where the Funds or its principal underwriter may not lawfully sell those shares.

©UBS 2018. All rights reserved.
The UBS Funds
Investment Company Act File No. 811-6637
UBS Asset Management (Americas) Inc.
is a subsidiary of UBS Group AG.
S1694

The UBS Funds

Prospectus | October 23, 2018

Includes:

• UBS Sustainable Development Bank Bond Fund
Class: P2: UDBTX

This prospectus offers Class P2 shares in one of the series of The UBS Funds (the "Trust") listed above (the "Fund").

As with all mutual funds, the US Securities and Exchange Commission ("SEC") has not approved or disapproved the Fund's shares or determined whether this prospectus is complete or accurate. To state otherwise is a crime.

Not FDIC Insured. May lose value. No bank guarantee.

Contents

The UBS Funds

What every investor should know about the fund

Fund summary	Page
• UBS Sustainable Development Bank Bond Fund		3
More information about the fund
• Investment objective, strategies, securities selection and risks		7
Your investment
Information for managing your fund account
• Flexible pricing		11
• Buying shares		11
• Selling shares		12
• Exchanging shares		13
• Pricing and valuation		13
Additional information
Additional important information about the fund
• Management		15
• Disclosure of portfolio holdings		16
• Dividends and taxes		16
• Financial highlights		19
• Where to learn more about the fund		Back Cover

Please find the UBS family of funds privacy notice on page 20 of this prospectus.

Please find the UBS Asset Management business continuity planning overview on page 21 of this prospectus.

The fund is not a complete or balanced investment program.

UBS Sustainable Development Bank Bond Fund
Fund Summary

Investment objective

The Fund seeks current income.

Fees and expenses

These tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund. Shares of Class P2 are available for purchase on behalf of clients of a fee-based program or certain other advisory programs in which UBS Asset Management (Americas) Inc., the Fund's investment advisor and administrator ("UBS AM (Americas)" or the "Advisor"), exercises investment discretion. Clients pay a wrap fee or a similar advisory fee to participate in such programs. Shares of Class P2 are also available for purchase on behalf of institutional clients with which the Advisor or its affiliates has signed a separate investment management agreement, pursuant to which such clients pay an advisory fee.

Shareholder fees (fees paid directly from your investment)

	Class P2
Maximum front-end sales charge (load) imposed on purchases (as a % of offering price)		None
Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)		None

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class P2
Management fees		0.15	%
Distribution and/or service (12b-1) fees		None
Other expenses¹		0.48
Total annual fund operating expenses		0.63
Less management fee waiver/expense reimbursements²		0.48
Total annual fund operating expenses after management fee waiver/expense reimbursement²		0.15

¹ "Other expenses" are based on estimates for the current fiscal year.

² The Trust, with respect to the Fund, and the Advisor, have entered into a written agreement pursuant to which the Advisor has agreed to waive its management fees and retained administration fees, and to reimburse expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) to the extent

necessary so that the Fund's ordinary operating expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) through the period ending October 29, 2019 do not exceed 0.15%. Pursuant to the expense limitation agreement, the Advisor is entitled to be reimbursed for any expenses it reimburses to the extent such reimbursement can be made during the three fiscal years following the date on which such expense reimbursements were made, provided that the reimbursement of the Advisor by the Fund will not cause the Fund to exceed the lesser of any applicable expense limit that is in place for the Fund (i) at the time of the reimbursement or (ii) at the time of the recoupment. The expense limitation agreement may be terminated by the Fund's Board of Trustees at any time and also will terminate automatically upon the expiration or termination of the Fund's advisory contract with the Advisor. Upon termination of the expense limitation agreement, however, the Advisor's three year recoupment rights will survive.

Example

				1 year				3 years
Class P2				$	15			$	153

Portfolio turnover

Principal strategies
Principal investments

The Fund's investments in fixed income securities may have all types of interest rate payment and reset terms. The Fund generally invests only in US dollar-denominated securities.

The Fund is a non-diversified fund.

Management process

Main risks

All investments carry a certain amount of risk, and the Fund cannot guarantee that it will achieve its investment objective. You may lose money by investing in a Fund. An investment in the Fund is not a deposit of the bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Below are some of the specific risks of investing in the Fund.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an

redemptions at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the Advisor may not produce the desired results.

Risks of development bank bonds: The value of the Fund's investments in bonds issued by development banks may fall due to adverse financial market developments in the United States and abroad. Borrowers from development banks include foreign countries, which may include emerging market countries, and borrowers of specific development banks also include the private sector with or without government guarantee. Therefore, negative economic, social and political developments could affect the ability of a borrower to repay its loan to the development bank and thus affect its financial condition. In addition, investments in such development bank bonds may involve special risks because the Fund may have limited legal recourse in the event of default. Also, development bank bonds may sometimes be less liquid and more difficult to sell and to value than high-quality securities of US issuers. Bonds issued by a development bank are backed by the shareholders of the development bank. The development bank may be supported via various mechanisms including, preferred creditor status, equity injections by its shareholders and callable capital, even though the latter may have never been tested with respect to an issuer. Changes in the shareholder structure of a development bank or changes in the strength of the support by its shareholders could affect the credit rating and thus the value of the bonds issued by the development bank.

Performance

There is no performance information quoted for the Fund as the Fund had not commenced investment operations as of the date of this prospectus.

Investment advisor

UBS Asset Management (Americas) Inc. serves as the investment advisor to the Fund.

Portfolio manager

• Matthias Dettwiler, portfolio manager of the Fund since its inception.

Purchase & sale of Fund shares

required minimum initial investment is $25 million, except that UBS Asset Management (US) Inc. ("UBS AM (US)") may waive the minimum for institutional clients at UBS AM (US)'s sole discretion. Class P2 shares of the Fund may be redeemed on any business day, which is any day the New York Stock Exchange is open for business. In addition, Class P2 shares will be purchased, redeemed or exchanged when a client terminates their wrap fee or advisory program account or, for institutional clients, their investment management agreement. Other registered investment companies managed by the Advisor also may purchase Class P2 shares of the Fund, subject to no minimum investment requirements.

Tax information

More information about the fund

Investment objective, strategies,
securities selection and risks

Fund objective

The Fund seeks current income.

The Fund's investment objective is "non-fundamental." This means that it may be changed by the Fund's Board of Trustees without shareholder approval.

Principal investment strategies

The Fund's investments in fixed income securities may have all types of interest rate payment and reset terms. The Fund generally invests only in US dollar-denominated securities.

The Fund is a non-diversified fund.

The Fund will notify shareholders at least 60 days prior to any change in its policy of investing at least 80% of

its net assets (plus borrowings for investment purposes, if any) in bonds and/or instruments that provide exposure to bonds issued by development banks.

Securities selection

More information about the fund

The Fund may lend its portfolio securities to generate additional income.

More about risks

An investment in the Fund is not guaranteed; you may lose money by investing in the Fund. The other principal risks presented by an investment in the Fund are:

More information about the fund

otherwise adversely affect the value or performance of derivatives.

More information about the fund

ties. The Fund also could lose money if it does not recover the securities and/or the value of the collateral falls, including the value of investments made with cash collateral.

Other information

The terms of the CPO exclusion require the Fund, among other things, to adhere to certain limits on its investments in "commodity interests." Commodity interests include commodity futures, commodity options and swaps, which in turn include non-deliverable forward currency agreements, as further described in the Fund's SAI. Because the Advisor and the Fund intend to comply with the terms of the CPO exclusion at this time, the Fund will limit its investments in these types of instruments. The Fund is not intended as a vehicle for trading in the commodity futures, commodity options or swaps markets. The CFTC has neither reviewed nor approved the Advisor's reliance on these exclusions, or the Fund, its investment strategies or this prospectus.

Managing your fund account

Flexible pricing

The Fund offers three classes of shares—Class A, Class P, and Class P2. Each class has different sales charges and ongoing expenses. You can choose the class that is best for you, based on how much you plan to invest in a fund and how long you plan to hold your fund shares, the expenses of the share class and whether you qualify for a reduction or waiver of an applicable sales charge. Class P2 shares are available only to certain types of investors. Only Class P2 shares are offered in this prospectus.

Class P2 shares

Shareholders pay no front-end or deferred sales charges on Class P2 shares.

Class P2 shares do not pay ongoing 12b-1 distribution or service fees.

Buying shares

Class P2 shares of the Fund are available for purchase on behalf of clients of a wrap fee program or other advisory programs in which the Advisor exercises investment discretion. There are no minimum investment requirements for purchases on behalf of clients in such programs. Shares of Class P2 are also available for purchase on behalf of institutional clients with which the Advisor or its affiliates has signed a separate investment management agreement, pursuant to which such clients pay an advisory fee. For such institutional clients, the required minimum initial investment is $25 million, except that UBS AM (US) may waive the minimum for institutional clients at UBS AM (US)'s sole discretion. Other registered investment companies managed by the Advisor also may purchase Class P2 shares of the Fund, subject to no minimum investment requirements.

The Fund and UBS AM (US) reserve the right to reject a purchase order or suspend the offering of shares.

Market timers. The interests of the Fund's long-term shareholders and their ability to manage their investments may be adversely affected when the Fund's shares are repeatedly bought and sold in response to short-term market fluctuations—also known as "market timing." Market timing may cause the Fund to have difficulty implementing long-term investment strategies, because it cannot predict how much cash it will have to

invest. Market timing also may force the Fund to sell portfolio securities at disadvantageous times to raise the cash needed to buy a market timer's Fund shares. Market timing also may materially increase the Fund's transaction costs, administrative costs or taxes. These factors may hurt the Fund's performance and its shareholders.

Class P2 shares of the Fund are used for separately managed accounts advised or sub-advised by the Advisor or its affiliates, on behalf of institutional clients with which the Advisor or its affiliates have signed a separate investment management agreement, and by other registered investment companies managed by the Advisor. Decisions as to whether to invest assets of a managed account, or invest assets on behalf of an institutional client, in Class P2 shares of the Fund will be made by the Advisor. Because Class P2 shares of the Fund are used as components of "wrap" accounts, Class P2 shares may be purchased or redeemed on a frequent basis for rebalancing purposes.

The Board of Trustees of the Trust has adopted the following policies as a means to discourage, detect and prevent market timing. The Fund will reject purchase orders and exchanges into the Fund by any person, group or account that UBS AM (Americas), as the Fund's Advisor and Administrator, determines to be a market timer. UBS AM (Americas) maintains market timing prevention procedures under which it reviews daily reports from the Fund's transfer agent of all accounts that engaged in transactions in Fund shares that exceed a specified monetary threshold and effected such transactions within a certain period of time to evaluate whether any such account had engaged in market timing activity. In evaluating the account transactions, UBS AM (Americas) will consider the potential harm of the trading or exchange activity to the Fund or its shareholders. If UBS AM (Americas) determines, in its sole discretion, that a shareholder has engaged in market timing, the shareholder will be permanently barred from making future purchases or exchanges into the Fund. Additionally, in making a determination as to whether a shareholder has engaged in market timing, the shareholder's account may be temporarily barred from making additional investments into the Fund pending a definitive determination. In addition, if a Financial Advisor is identified as the Financial Advisor of two or more accounts that have engaged in market timing, UBS AM (Americas) may prohibit the Financial Advisor

from making additional purchases of the Fund on behalf of its clients.

Shares of the Fund may be held through omnibus account arrangements, whereby a broker-dealer, investment advisor, retirement plan sponsor or other financial intermediary (each a "Financial Intermediary") maintains an omnibus account with the Fund for trading on behalf of its customers or participants. Omnibus accounts are accounts that aggregate the transactions of underlying shareholders, thus making it difficult to identify individual underlying account holder activity. If UBS AM (Americas) detects an unusual pattern of trading activity, UBS AM (Americas) will notify the Financial Intermediary of the omnibus account and will generally request that the Financial Intermediary provide underlying account detail. If UBS AM (Americas) identifies market timing activity, it generally will instruct the Financial Intermediary to block the customer or participant from further purchases of Fund shares. In the event that the Financial Intermediary is unable to identify and block the customer or participant, UBS AM (Americas) generally will require the Financial Intermediary to block the particular plan from further purchases of Fund shares or instruct the Fund's transfer agent to block all purchases and exchange purchase orders from the Financial Intermediary. UBS AM (Americas) may periodically request underlying account detail for omnibus accounts for review and analysis.

While the Fund will seek to take actions (directly and with the assistance of Financial Intermediaries) that will detect market timing, the Fund's efforts may not be completely successful in minimizing or eliminating such trading activity.

Certain types of transactions are generally exempt from the market timing prevention procedures. These exempt transactions include redemptions through the Automatic Cash Withdrawal Plan, purchases through an automatic investment plan, purchases and redemptions by wrap fee accounts that have an automatic rebalancing feature and that have been identified to the Fund's principal underwriter and transfer agent, purchases and redemptions on behalf of clients of a fee based advisory program or certain other advisory programs in which UBS AM (Americas) exercises investment discretion, purchases and redemptions on behalf of institutional clients with which UBS AM (Americas) has signed an investment management agreement and exercises investment

discretion on behalf of such client, purchases and redemptions below a specified monetary threshold by institutional clients with which UBS AM (Americas) has signed a separate investment management agreement, and purchases and redemptions by other registered investment companies managed by the Advisor.

Selling shares

You can sell your Fund shares at any time.

In addition, shares will be redeemed when you terminate your managed account or, for institutional clients, your investment management agreement.

The Fund typically expects to pay sale proceeds to redeeming shareholders within 1-3 business days following receipt of a shareholder redemption order for those payments made to your account held with a financial institution; however, the Fund may take up to 7 days to pay sale proceeds. For sale proceeds that are paid directly to a shareholder by the Fund, the Fund typically expects to pay proceeds by wire, ACH, or mailing a check to redeeming shareholders within 1 business day following receipt of the shareholder redemption order; however, the Fund may take up to 7 days to pay sale proceeds.

Typically, redemptions of Fund shares will be made in cash. The Fund typically expects to meet redemption requests by using holdings of cash or cash equivalents and/or proceeds from the sale of portfolio holdings. On a less regular basis, the Fund also may draw on a bank line of credit to meet redemption requests. In addition, under stressed market conditions or a particularly large redemption, the Fund may distribute redemption proceeds in-kind (instead of cash) to meet redemption requests, as described below.

Although not routinely used by the Fund, the Fund reserves the right to pay redemptions "in kind" (i.e., payment in securities rather than cash) if the investment you are redeeming is large enough to affect the Fund's operations or in particularly stressed market conditions. In these cases, you might incur brokerage or other costs converting the securities to cash. The securities included in a redemption in kind may include illiquid securities that may not be immediately saleable.

To help the government fight the funding of terrorism and money laundering activities, federal law requires all

financial institutions to obtain, verify and record information that identifies each person who opens an account. If you do not provide the information requested, the Fund may not be able to maintain your account. If the Fund is unable to verify your identity (or that of another person(s) authorized to act on your behalf) within a reasonable time, the Fund and UBS AM (US) reserve the right to close your account and/or take such other action they deem reasonable or required by law. If we decide to close your account for this reason, your fund shares will be redeemed at the net asset value per share next calculated after the account is closed, less any applicable fees. You may recognize a gain or loss on the redemption of your Fund shares, and you may incur a tax liability.

Exchanging shares

You may exchange Class P2 shares of the Fund for shares of the same class of most other Family Funds.

You may exchange shares of one fund for shares of another Family Fund only after the first purchase has settled and the first fund has received your payment.

The Fund may modify or terminate the exchange privilege at any time.

Pricing and valuation

The price at which you may buy, sell or exchange Fund shares is based on net asset value per share. The Fund generally calculates its net asset value on days that the New York Stock Exchange ("NYSE") is open. The Fund calculates net asset value separately for each class as of the close of regular trading on the NYSE (generally, 4:00 p.m., Eastern time). The NYSE normally is not open, and the Fund does not price its shares, on most national holidays and on Good Friday. To the extent that the Fund's assets are traded in other markets on days when the NYSE is not open, the value of the Fund's assets may be affected on those days. If trading on the NYSE is halted for the day before 4:00 p.m., Eastern

time, the Fund's net asset value per share generally will still be calculated as of the close of regular trading on the NYSE. The time at which the Fund calculates its net asset value and until which purchase, sale or exchange orders are accepted may be changed as permitted by the SEC.

Your price for buying, selling or exchanging shares will be based on the net asset value (adjusted for any applicable sales charges) that is next calculated after the Fund receives your order in good form. If you place your order on a day the NYSE is not open, your price for buying, selling or exchanging shares will be based on the net asset value (adjusted for any applicable sales charges) that is calculated on the next day that the NYSE is open. If you place your order through a financial institution, your financial advisor is responsible for making sure that your order is promptly sent to the Fund.

The Fund calculates its net asset value based on the current market value, where available, for its portfolio investments. The Fund normally obtains market values for its investments from independent pricing sources and broker-dealers. Independent pricing sources may use reported last sale prices, official market closing prices, current market quotations or valuations from computerized "evaluation" systems that derive values based on comparable investments. An evaluation system incorporates parameters such as security quality, maturity and coupon, and/or research and evaluations by its staff, including review of broker-dealer market price quotations, if available, in determining the valuation of the portfolio investments. If a market value is not readily available from an independent pricing source for a particular investment, that investment is valued at fair value as determined in good faith by or under the direction of the Trust's Board of Trustees.

valuation is determined by the Fund's custodian. Foreign currency exchange rates are generally determined as of the close of the NYSE.

Investments traded in the over-the-counter ("OTC") market and listed on The NASDAQ Stock Market, Inc. ("NASDAQ") normally are valued at the NASDAQ Official Closing Price. Other OTC securities are normally valued at the last bid price on the valuation date available prior to valuation. Investments that are listed on US and foreign stock exchanges normally are valued at the market closing price, the last sale price on the day the securities are valued or, lacking any sales on such day, at the last available bid price.

The Trust's Board of Trustees has delegated to the Equities, Fixed Income, and Multi-Asset Valuation Committee the responsibility for making fair value determinations with respect to the Fund's portfolio holdings. The types of investments for which such fair value pricing may be necessary include, but are not limited to: foreign investments under some circumstances, as discussed below; investments of an issuer that has entered into a restructuring; investments whose trading has been halted or suspended; fixed-income securities that are in default and for which there is no current market value quotation; and investments that are restricted as to transfer or resale. The need to fair value the Fund's portfolio investments may also result from low trading volume in foreign markets or thinly traded domestic investments, and when a security subject to a trading limit or collar on the exchange or market on which it is primarily traded reaches the "limit up" or "limit down" price and no trading has taken place at that price. Various factors may be reviewed in order to make a good faith determination of an investment's fair value. These factors include, but are not limited to, fundamental analytical data relating to the investment; the nature and duration of restrictions on disposition of the investments; and the evaluation of forces that influence the market in which the investments are purchased and sold.

The Fund expects to price most of its portfolio investments based on current market value, as discussed previously. Investments for which market quotations are not readily available may be valued based upon appraisals received from a pricing service using a computerized evaluation system or formula method that takes into consideration market indices, matrices, yield

curves and other specific adjustments. This may result in the investments being valued at a price different from the price that would have been determined had the evaluation or formula method not been used. Investments also may be valued based on appraisals derived from information concerning the investment or similar investments received from recognized dealers in those holdings. If the Fund concludes that a market quotation is not readily available for a portfolio investment for any number of reasons, including the occurrence of a "significant event" (e.g., natural disaster or governmental action), after the close of trading in its principal domestic or foreign market but before the close of regular trading on the NYSE, the Fund may use fair value methods to reflect those events. This policy is intended to assure that the Fund's net asset value fairly reflects the value of its portfolio holdings as of the time of pricing. The Fund may use a systematic fair valuation model provided by an independent third party to value investments principally traded in foreign markets in order to adjust for possible stale pricing that may occur between the close of the foreign exchanges and the time for valuation. The systematic fair valuation model may use calculations based on indices of domestic securities and other appropriate indicators, such as prices of relevant American Depositary Receipts and futures contracts. If an investment is valued at a "fair value," that value is likely to be different from the last quoted market price for the investment. In cases where investments are traded on more than one exchange, the investments are valued on the exchange designated as the primary market by UBS AM (Americas), the investment advisor of the Fund.

Valuing investments at fair value involves greater reliance on judgment than valuing investments that have readily available market quotations. Fair value determinations can also involve reliance on quantitative models employed by a fair value pricing service. There can be no assurance that the Fund could obtain the fair value assigned to an investment if it were to sell the investment at approximately the time at which the Fund determines its net asset value per share. As a result, the Fund's sale or redemption of its shares at net asset value, at a time when a holding or holdings are valued at fair value, may have the effect of diluting or increasing the economic interest of existing shareholders.

The Fund may invest in investments that trade primarily in foreign markets that trade on weekends or other days

on which the Fund does not calculate its net asset value. As a result, the Fund's net asset value may change on days when you will not be able to buy and sell your Fund shares. Certain investments in which the Fund invests are traded in markets that close before 4:00 p.m., Eastern time. Normally, developments that occur between the close of the foreign markets and 4:00 p.m., Eastern time, will not be reflected in the Fund's net asset value. However, if the Fund determine that such developments are so significant that they will materially affect the value of the Fund's investments, the Fund may adjust the previous closing prices to reflect what the Board believes to be the fair value of these investments as of 4:00 p.m., Eastern time.

The Fund's portfolio holdings may also consist of shares of other investment companies in which the Fund invests. The value of each such investment company will be its net asset value at the time the Fund's shares are priced. Each investment company calculates its net asset value based on the current market value for its portfolio holdings. Each investment company values securities and other instruments in a manner as described in that investment company's prospectus.

Management

Investment advisor

(Americas) serves as the investment advisor to the Fund by managing the investment of assets of the Fund. As of June 30, 2018, the Advisor had approximately $171 billion in assets under management. The Advisor is an indirect asset management subsidiary of UBS Group AG and a member of the UBS Asset Management Division, which had approximately $817 billion in assets under management as of June 30, 2018. UBS is an internationally diversified organization headquartered in Zurich, Switzerland, with operations in many areas of the financial services group of industries.

Portfolio management

The Advisor's investment professionals are organized into investment management teams, with a particular team dedicated to a specific asset class. Information is provided below for the portfolio manager within the investment management team that is primarily responsible for coordinating the day-to-day management of the Fund.

The Fund's SAI provides information about the Fund's portfolio manager's compensation, other accounts managed by the portfolio manager and the portfolio manager's ownership of Fund shares.

Advisory fees

The investment advisory fees (expressed as a monthly fee at an annual rate multiplied by the average daily net assets of the Fund) payable to the Advisor, before fee waivers and/or expense reimbursements, if applicable, by the Fund, are presented in the table below.

The Advisor has contractually agreed to waive its management fees and retained administration fees and/or reimburse certain expenses so that the ordinary

operating expenses of the Fund (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) do not exceed the amounts listed in the footnote to the Expense Table. The contractual fee waiver and/or expense reimbursement agreement will remain in place for the period ending October 29, 2019. The contractual fee waiver agreement also provides that the Advisor is entitled to be reimbursed for expenses it reimbursed to the extent such reimbursement can be made during the three fiscal years following the date on which such expense reimbursements were made, provided that the reimbursement by the Fund of the Advisor will not cause the total operating expense ratio to exceed the lesser of the applicable expense limit that is in place for the Fund (i) at the time of the reimbursement or (ii) at the time of the recoupment.

The Fund has not yet commenced operations as of the date of this prospectus. A discussion regarding the basis for the Board of Trustees' approval of the investment advisory agreement between the Trust and Advisor on behalf of the Fund will be available in the Fund's semiannual report to shareholders for the period ending December 31.

Fund				Advisory Fee
UBS Sustainable Development Bank Bond Fund					0.15	%

Administrator

UBS AM (Americas) is also the administrator of the Fund. The Fund pays UBS AM (Americas) an annual contract rate of 0.075% of its average daily net assets for administrative services, to the extent such fee is not otherwise waived as noted above.

Disclosure of portfolio holdings

Due to the recent launch of the Fund, the Fund will provide initial public disclosures of portfolio holdings on the Funds' Web Site at https://www.ubs.com/us/en/asset-management/individual-investors-and-financial-advisors/products/mutual_fund.html. Within five business days after the October 2018 month-end, the Fund will post a complete schedule of portfolio holdings as of October 31, 2018.

The Fund will file its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. The Fund's Forms N-Q will be available on the SEC's Web Site at www.sec.gov. The Fund's Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the SEC's Public Reference Room may be obtained by calling 202-551 8090. Additionally, you may obtain copies of Forms N-Q from the Fund upon request by calling 1-800-647 1568.

The Fund's complete schedule of portfolio holdings for the second and fourth quarters of each fiscal year is filed with the SEC on Form N-CSR and appears in the semiannual and annual reports, respectively, sent to shareholders. The semiannual and annual reports for the Fund will be posted on the Fund's Web Site at http://www.ubs.com/us/en/asset_management/
individual_investors/mutual_fund.html. Please consult the Fund's SAI for a description of the policies and procedures that govern disclosure of the Fund's portfolio holdings.

Dividends and taxes

Dividends and distributions

The Fund intends to qualify each year as a regulated investment company under the Internal Revenue Code of 1986, as amended ("IRC"). As a regulated investment company, the Fund generally pays no federal income tax on the income and gains it distributes to you. The Fund expects to declare and distribute all of its net investment income, if any, to shareholders as dividends monthly. The Fund will distribute net realized capital gains, if any, at least annually, usually in December. The Fund may distribute such income dividends and capital gains more frequently, if necessary, in order to reduce or eliminate federal excise or income taxes on the Fund. The amount of any distribution will vary, and there is no guarantee the Fund will pay either an income dividend or a capital gains distribution.

Classes with higher expenses are expected to have lower income dividends.

You will receive income dividends and capital gain distributions in additional shares of the same class of the Fund unless you notify your investment professional or

the Fund in writing that you elect to receive them in cash. Clients who own Fund shares through certain wrap fee programs may not have the option of electing to receive dividends in cash. Distribution options may be changed at any time by requesting a change in writing. Dividends and distributions are reinvested on the reinvestment date at the net asset value determined at the close of business on that date.

Annual statements—Each year, the Fund will send you an annual statement (Form 1099) of your account activity to assist you in completing your federal, state and local tax returns. Distributions declared in December to shareholders of record in such month, but paid in January, are taxable as if they were paid in December.

Prior to issuing your statement, the Fund makes every effort to reduce the number of corrected forms mailed to you. However, if the Fund finds it necessary to reclassify its distributions or adjust the cost basis of any covered shares sold or exchanged after you receive your tax statement, the Fund will send you a corrected Form 1099.

Avoid "buying a dividend"—At the time you purchase your Fund shares, the Fund's net asset value may reflect undistributed income, undistributed capital gains, or net unrealized appreciation in value of portfolio securities held by the Fund. For taxable investors, a subsequent distribution to you of such amounts, although constituting a return of your investment, would be taxable. Buying shares in the Fund just before it declares an income dividend or capital gains distribution is sometimes known as "buying a dividend."

Taxes

Fund distributions—The Fund expects, based on its investment objective and strategies, that its distributions, if any, will be taxable as ordinary income, capital gains, or some combination of both. This is true whether you reinvest your distributions in additional Fund shares or receive them in cash.

holders at long-term capital gain rates, provided certain holding period requirements are met. However, because the income of the Fund is derived from investments earning interest rather than dividend income, generally none or only a small portion of the income dividends paid to you by the Fund is anticipated to be qualified dividend income eligible for taxation by individuals at long-term capital gain tax rates.

The use of derivatives by the Fund may cause the Fund to realize higher amounts of ordinary income or short-term capital gain, distributions from which are taxable to individual shareholders at ordinary income tax rates rather than at the more favorable tax rates for long-term capital gain.

If the Fund qualifies to pass through to you the tax benefits from foreign taxes it pays on its investments, and elects to do so, then any foreign taxes it pays on these investments may be passed through to you as a foreign tax credit.

Sale or redemption of Fund shares—If you are a taxable investor, when you sell or redeem your shares in the Fund, you may realize a capital gain or loss. For tax purposes, an exchange of your Fund shares for shares of a different Family Fund is the same as a sale. Any loss incurred on the sale or exchange of Fund shares held for six months or less will be treated as a long-term capital loss to the extent of capital gain distributions received with respect to such shares. The Fund is required to report to you and the Internal Revenue Service ("IRS") annually on Form 1099-B not only the gross proceeds of Fund shares you sell or redeem but also the cost basis. Cost basis will be calculated using the Fund's default method of average cost, unless you instruct the Fund to use a different calculation method. Shareholders should carefully review the cost basis information provided by the Fund and make any additional basis, holding period or other adjustments that are required when reporting these amounts on their federal income tax returns. If your account is held by your investment representative (financial advisor or other broker), please contact that representative with respect to reporting of cost basis and available elections for your account. Their default method for cost basis reporting may be different than the Fund's default method. Tax-advantaged retirement accounts will not be affected.

Medicare tax—An additional 3.8% Medicare tax is imposed on certain net investment income (including ordinary dividends and capital gain distributions received from the Fund and net gains from redemptions or other taxable dispositions of Fund shares) of US individuals, estates and trusts to the extent that such person's "modified adjusted gross income" (in the case of an individual) or "adjusted gross income" (in the case of an estate or trust) exceeds a threshold amount. This Medicare tax, if applicable, is reported by you on, and paid with, your federal income tax return.

Backup withholding—By law, if you do not provide the Fund with your proper taxpayer identification number and certain required certifications, you may be subject to backup withholding on any distributions of income, capital gains, or proceeds from the sale of your shares. The Fund also must withhold if the IRS instructs it to do so. When withholding is required, the amount will be 24% of any distributions or proceeds paid.

State and local taxes—Fund distributions and gains from the sale or exchange of your Fund shares generally are subject to state and local taxes.

term capital gain dividends, if such amounts are reported by the Fund. However, any such dividends and distributions of income and capital gains will be subject to backup withholding at a rate of 24% if you fail to properly certify that you are not a US person.

Other reporting and withholding requirements—Under the Foreign Account Tax Compliance Act ("FATCA"), the Fund will be required to withhold a 30% tax on the following payments or distributions made by the Fund to certain foreign entities, referred to as foreign financial institutions or non-financial foreign entities, that fail to comply (or be deemed compliant) with extensive reporting and withholding requirements designed to inform the US Department of the Treasury of US-owned foreign investment accounts: (a) income dividends and (b) after December 31, 2018, certain capital gain distributions, return of capital distributions and the proceeds arising from the sale of Fund shares. The Fund may disclose the information that it receives from its shareholders to the IRS, non-US taxing authorities or other parties as necessary to comply with FATCA or similar laws. Withholding also may be required if a foreign entity that is a shareholder of the Fund fails to provide the Fund with appropriate certifications or other documentation concerning its status under FATCA.

Financial highlights

No financial information is presented for the Fund as it was not publicly offered prior to the date of this prospectus.

Fund's privacy notice

UBS Asset Management, Americas Region

Business continuity planning overview

Essential elements of the business continuity plan include:

• Crisis communication procedures—Action plans for coordinating essential communications for crisis management leaders, employees, and key business partners

• Disaster recovery site—Alternative dedicated workspace, technology infrastructure, and systems support that is fully operational during a disaster declaration

If you want more information about the Fund, the following documents are available free upon request:

Annual/semiannual reports

Additional information about the Fund's investments will be available in the Fund's annual and semiannual reports to shareholders. In the Fund's annual reports, you will find a discussion of the market conditions and investment strategies that significantly affected the Fund's performance during the last fiscal year. As of the date of this prospectus, the annual and semiannual reports were not yet available for the Fund because the Fund had not yet commenced operations.

Statement of additional information (SAI)

The SAI provides more detailed information about the Fund and is incorporated by reference into this prospectus (i.e., it is legally considered a part of this prospectus).

When available, you may obtain free copies of the Fund's annual and semiannual reports and the SAI, and discuss your questions about the Fund, by contacting the Fund directly at 1-800-647 1568, or by contacting your investment professional. The annual and semiannual reports and the SAI may also be obtained, free of charge, by accessing the documents on the Fund's Web Site at http://www.ubs.com/us/en/asset_management/
individual_investors/mutual_fund.html.

You may review and copy information about the Fund, including shareholder reports and the SAI, at the Public Reference Room of the US Securities and Exchange Commission (SEC) in Washington, D.C. You may obtain information about the operations of the SEC's Public Reference Room by calling the SEC at 202-551 8090. You may get copies of reports and other information about the Fund:

• For a fee, by electronic request at [email protected] or by writing the SEC's Public Reference Section, Washington, D.C. 20549-1520; or

• Free from the EDGAR Database on the SEC's Internet Web Site at: http://www.sec.gov.

The UBS Funds

Investment Company Act File No. 811-6637

UBS Asset Management (Americas) Inc.

is a subsidiary of UBS Group AG.

S1696

The UBS Funds

Statement of Additional Information | October 23, 2018

One North Wacker Drive
Chicago, Illinois 60606

This Statement of Additional Information ("SAI") relates to the Class P2 shares of the following fund (the "Fund"), which is a series of The UBS Funds, an open-end management investment company (the "Trust"):

				Class P2
UBS Sustainable Development Bank Bond Fund				UDBTX

UBS Asset Management (Americas) Inc. ("UBS AM (Americas)"), an indirect asset management subsidiary of UBS Group AG, serves as the investment advisor and administrator for the Fund. UBS Asset Management (US) Inc. ("UBS AM (US)") serves as the underwriter for the Fund. UBS AM (US) is an indirect wholly owned subsidiary of UBS Group AG.

This SAI is not a prospectus and should be read only in conjunction with the Fund's current Prospectus, dated October 23, 2018. A copy of the Prospectus may be obtained by calling your investment professional or by calling the Trust toll-free at 1-800-647 1568. The Prospectus contains more complete information about the Fund. You should read it carefully before investing.

Table of contents	Page
General information about the Trust		4
Diversification status		4
General definitions		4
Investment strategies		5
Investments relating to the Fund		5
Cash and cash equivalents		5
Repurchase agreements		5
Reverse repurchase agreements		6
Borrowing		6
Loans of portfolio securities		7
Futures		8
Options on futures contracts		10
Special risks of certain derivatives		10
Risks of potential regulation of swaps and other derivatives		11
Commodity pool operator exclusion		11
Illiquid securities		12
Rule 144A		12

Table of contents	Page
Non-publicly traded securities, private placements and restricted securities		13
Regulation S Securities		13
Investment company securities and investments in affiliated investment companies		13
Eurodollar securities		14
Foreign securities		14
Emerging markets investments		14
Risks of investing in emerging markets		16
Issuer location		17
Short sales		18
Fixed income securities		18
Yield factors		19
Duration		19
Development bank bonds		20
Floating rate and variable rate obligations		20
When-issued and delayed delivery securities		21
Asset-backed securities		21
Zero coupon and delayed interest securities		23
Other investments		24
Summary of risks		24
Cybersecurity risk		24
Investment restrictions		24
Management of the Trust		26
Independent trustees		29
Officers		31
Information about Independent trustee ownership of securities issued by UBS AM		33
Information about trustee ownership of Fund shares		33
Compensation table		33
Principal holders of securities		34
Investment advisory, principal underwriting and other service arrangements		35
Advisor		35
Portfolio managers		36
Administrative, accounting and custody services		38
Principal underwriting arrangements		39
Transfer agency services		39
Independent registered public accounting firm		39
Legal counsel		39
Personal trading policies		40
Proxy voting policies		40
Portfolio holdings disclosure policies and procedures		41
Portfolio transactions and brokerage commissions		45

Table of contents	Page
Bank line of credit		45
Portfolio turnover		46
Shares of beneficial interest		47
Additional purchase, exchange and redemption information and other services		47
Transfer of securities		48
Valuation of shares		48
Taxes		50
Taxation of the Fund		50
Taxation of Fund distributions		53
Sales, exchanges and redemptions of Fund shares		56
Tax treatment of portfolio transactions		58
Backup withholding		62
Non-US investors		62
Effect of future legislation; local tax considerations		64
Potential conflicts of interest		65
Performance calculations		73
Securities lending		73
Financial statements and report of independent registered public accounting firm		73
Appendix A—Debt ratings		A-1

General information about the Trust

Diversification status

The Fund is classified as "non-diversified" for purposes of the Act, which means that the Fund is not limited by the Act with regard to the portion of its assets that may be invested in the securities of a single issuer. To the extent that a non-diversified Fund makes investments in excess of 5% of its total assets in the securities of a particular issuer, its exposure to the risks associated with that issuer is increased. Because the non-diversified Fund may invest in a limited number of issuers, the performance of particular securities may adversely affect the performance of the Fund or subject the Fund to greater price volatility than that experienced by diversified investment companies.

General definitions

As used throughout this SAI, the following terms shall have the meanings listed:

"Act" shall mean the Investment Company Act of 1940, as amended.

"Administrator" or "UBS AM (Americas)" shall mean UBS Asset Management (Americas) Inc., which serves as the Fund's administrator.

"Advisor" or "UBS AM (Americas)" shall mean UBS Asset Management (Americas) Inc., which serves as the Fund's investment advisor.

"Board" shall mean the Board of Trustees of the Trust.

"Code" shall mean the Internal Revenue Code of 1986, as amended.

"Family Funds" shall mean the Fund and other funds for which UBS Asset Management (US) Inc. or any of its affiliates serves as principal underwriter.

"Fund" shall mean the UBS Sustainable Development Bank Bond Fund.

"Fitch" shall mean Fitch Ratings, Inc.

"Moody's" shall mean Moody's Investors Service, Inc.

"SEC" shall mean the US Securities and Exchange Commission.

"S&P" shall mean Standard & Poor's Financial Services LLC.

"Trust" shall mean The UBS Funds, an open-end management investment company registered under the Act.

"Underwriter" or "UBS AM (US)" shall mean UBS Asset Management (US) Inc., which serves as the Fund's underwriter.

"1933 Act" shall mean the Securities Act of 1933, as amended.

Investment strategies

The following discussion of investment techniques and instruments supplements and should be read in conjunction with the investment objectives and policies set forth in the Fund's Prospectus. The investment practices described below, except for the discussion of percentage limitations with respect to portfolio loan transactions and borrowing, are not fundamental and may be changed by the Board without the approval of the shareholders.

Investments relating to the Fund

Cash and cash equivalents

The Fund may invest a portion of its assets in short-term debt securities (including repurchase agreements and reverse repurchase agreements) of corporations, governments and their agencies and instrumentalities and banks and finance companies, which may be denominated in any currency. The Fund may also invest a portion of its assets in shares issued by money market mutual funds. When unusual market conditions warrant, the Fund may make substantial temporary defensive investments in cash equivalents up to a maximum of 100% of its net assets. Cash equivalent holdings may be in any currency (although any such non-US holdings may not constitute "cash or cash equivalents" for tax diversification purposes under the Code). When the Fund invests for defensive purposes, it may affect the attainment of the Fund's investment objective.

Pursuant to the rules and regulations under the Act and any exemptive orders issued thereunder, the Fund may invest cash (i) held for temporary defensive purposes; (ii) not invested pending investment in securities; (iii) that is set aside to cover an obligation or commitment of the Fund to purchase securities or other assets at a later date; and (iv) to be invested on a strategic management basis in one or more money market funds or other pooled investment vehicles, including other funds sponsored by UBS AM (US).

Repurchase agreements

When the Fund enters into a repurchase agreement, it purchases securities from a bank or broker-dealer that simultaneously agrees to repurchase the securities at a mutually agreed upon time and price or upon demand, thereby determining the yield during the term of the agreement. As a result, a repurchase agreement provides a fixed rate of return insulated from market fluctuations during the term of the agreement. The term of a repurchase agreement generally is short, possibly overnight or for a few days, although it may extend over a number of months (up to one year) from the date of delivery. Repurchase agreements are considered under the Act to be collateralized loans by the Fund to the seller secured by the securities transferred to the Fund. In accordance with the Act, repurchase agreements will be fully collateralized and the collateral will be marked-to-market daily. The Fund considers a repurchase agreement having more than seven days remaining to maturity as illiquid and will not enter into such repurchase agreement if, as a result, the Fund would have invested more than 15% of its nets assets in illiquid investments that are assets.

to qualify for pass-through treatment under the Code. Accordingly, the Fund will limit the value of its repurchase agreements on each of the quarterly testing dates to ensure compliance with Subchapter M of the Code.

Reverse repurchase agreements

A reverse repurchase agreement involves the risk that the market value of the securities retained by the Fund may decline below the price of the securities the Fund has sold but is obligated to repurchase under the agreement. In the event the buyer of securities under a reverse repurchase agreement files for bankruptcy or becomes insolvent, the Fund's use of the proceeds of the agreement may be restricted pending a determination by the other party, or its trustee or receiver, whether to enforce the Fund's obligation to repurchase the securities. Reverse repurchase agreements are considered borrowings by the Fund and as such, are subject to the same investment limitations.

Borrowing

The Fund may borrow money for temporary, emergency or extraordinary purposes, or to facilitate redemptions. The Fund will not borrow money in excess of 33¹/₃% of the value of its total assets (including amounts borrowed, but reduced by any liabilities not constituting senior securities). Any borrowing will be done from a bank with the required asset coverage of at least 300%. In the event that such asset coverage shall at any time fall below 300%, the Fund shall, within three days thereafter (not including Sundays or holidays), or such longer period as the SEC may prescribe by rules and regulations, reduce the amount of its borrowings to such an extent that the asset coverage of such borrowings shall be at least 300%.

Segregation of assets—Financial instruments that involve the Fund's obligation to make future payments to third parties will not be viewed as creating any senior security provided that the Fund covers its obligations as described below. Those financial instruments can include, among others, (i) reverse repurchase agreements, (ii) when-issued and delayed delivery securities, (iii) dollar rolls, (iv) to-be-announced securities, (v) securities sold short (vi) swaps, (vii) futures contracts, (viii) written options, (ix) forward currency contracts, and (x) non-deliverable forwards.

The Fund will consider its obligations involving such a financial instrument as "covered" when the Fund (1) maintains an offsetting financial position, or (2) segregates liquid assets (which include, but are not limited to, cash, cash equivalents, equities and debt instruments of any grade) equal to the Fund's exposures relating to the financial instrument, as determined on a daily basis. Dedicated Fund compliance policies and procedures, which the Board has approved, govern the kinds of transactions that can be deemed to be offsetting positions for purposes of (1) above, and the amounts of assets that need to be segregated for purposes of (2) above (segregated assets procedures). Any assets designated as segregated by the Fund, either physically or "earmarked" as segregated, for purposes of (2) above shall be liquid, unencumbered and marked-to-market daily (any such assets designated as segregated, either physically or "earmarked" as segregated, are referred to in this SAI as "Segregated Assets"), and such Segregated Assets shall be maintained in accordance with pertinent positions of the SEC.

sales, firm or standby commitment agreements and similar agreements. While it is not possible to fully predict the effects of the proposed regulation, the Advisor will continue to monitor developments as they apply to the Fund.

Loans of portfolio securities

The Fund may lend portfolio securities to qualified broker-dealers and financial institutions pursuant to agreements, provided the following conditions are satisfied: (1) the loan is secured continuously by collateral marked-to-market daily as described below; (2) the Fund may call the loan at any time and receive the securities loaned; (3) the Fund will receive any interest, dividends or other distributions paid on the loaned securities; and (4) the aggregate market value of securities loaned will not at any time exceed 33/3% of the market value of the Fund's total assets. However, as a non-fundamental policy, the Fund may not enter into a securities loan if, after giving effect thereto, portfolio securities having a value in excess of 30% of the market value of the Fund's total assets would be subject to securities loans.

When loaning portfolio securities, the Fund will initially require the borrower to provide the Fund with collateral in an amount at least equal to 102% of the market value of the loaned securities with respect to domestic securities or 105% of the market value of the loaned securities with respect to foreign securities provided that loans of "Government Securities" as defined in the Act may be collateralized at 100%. Thereafter, collateral will generally be maintained in an amount at least equal to 102% of the value of the securities loaned with respect to domestic securities, 105% of the value of the securities loaned with respect to foreign securities or 100% of the value of the securities loaned with respect to "Government Securities." Occasionally, for certain securities, the market value of the collateral may fall below the collateral amount stated above by a de minimis amount for a period of time. However, at no time will the market value of the collateral fall below the market value of the loaned securities with respect to domestic securities or 102% of the value of the loaned securities with respect to foreign securities.

Collateral may consist of cash or "Government Securities" as defined in the Act. Pursuant to rules and regulations under the Act, under normal conditions, the Fund invests cash collateral from securities lending activities into a money market fund. In addition, cash collateral may be invested in repurchase agreements.

In the case that voting or consent rights that accompany a loaned security pass to the borrower, the Fund will recall the loaned security to permit the exercise of such rights if the matter involved would have a material effect on the Fund's investment in the security.

Loans of securities involve a risk that the borrower may fail to return the securities or may fail to maintain the proper amount of collateral, which may result in a loss of money by the Fund or a delay in recovering the loaned securities. In addition, in the event of bankruptcy of the borrower, the Fund could experience delays in recovering the

loaned securities or only recover cash or a security of equivalent value. Therefore, the Fund will only enter into portfolio loans after a review of all pertinent factors by the Advisor under the supervision of the Board, including the creditworthiness of the borrower and then only if the consideration to be received from such loans would justify the risk. Creditworthiness will be monitored on an ongoing basis by the Advisor.

Futures

The Fund may enter into contracts for the purchase or sale for future delivery of securities and indices.

Generally, a futures contract is a standard binding agreement to buy or sell a specified quantity of an underlying reference asset, such as a specific security, currency, commodity interest rate or index, at a specified price at a specified later date. A purchase of a futures contract means the acquisition of a contractual right to obtain delivery to the Fund of the securities or foreign currency called for by the contract at a specified price during a specified future month. When a futures contract is sold, the Fund incurs a contractual obligation to deliver the securities or foreign currency underlying the contract at a specified price on a specified date during a specified future month. When the Fund enters into a futures transaction, it must deliver to the FCM selected by the Fund, an amount referred to as "initial margin." The initial margin is required to be deposited in cash or government securities with an FCM. Minimum initial margin requirements are established by the futures exchange and FCMs may establish initial margin requirements that are higher than the exchange requirements. After a futures contract position is opened, the value of the contract is marked-to-market daily. If a futures contract price changes to the extent that the margin deposit does not satisfy margin requirements, payment of a "variation margin" to be held by the FCM, will be required. Conversely, a reduction in the contract value may reduce the required margin, resulting in a repayment of excess margin to the custodial accounts of the Fund. The Fund may also effect futures transactions through FCMs who are affiliated with the Advisor or the Fund in accordance with procedures adopted by the Board. Because all transactions in the futures market are made, offset or fulfilled by an FCM through a clearinghouse associated with the exchange on which the contracts are traded, the Fund will incur brokerage fees when it buys or sells futures contracts.

The Fund will enter into futures transactions on domestic exchanges and, to the extent such transactions have been approved by the CFTC for sale to customers in the United States, on foreign exchanges. In addition, the Fund may sell stock index futures in anticipation of or during a market decline to attempt to offset the decrease in market value of its common stocks that might otherwise result; and they may purchase such contracts in order to offset increases in the cost of common stocks that they intend to purchase. Although some futures contracts by their terms require the actual delivery or acquisition of the underlying instrument or asset, some require cash settlement. Where futures contracts provide for the delivery of securities, deliveries usually do not occur. Futures contracts can be terminated by entering into offsetting transactions.

The Fund will cover its obligations under the futures transactions in which it participates by either (i) holding offsetting positions that appropriately equal the daily market value of the Fund's position in the futures contract (less the initial margin and any variation margins deposited with an FCM); or (ii) accruing such amounts on a daily basis and maintaining Segregated Assets to cover the futures contract. With respect to a futures contract that is not contractually required to "cash-settle," the Fund must cover its open position by maintaining Segregated Assets equal to the contract's full, notional value. However, the Fund may net non-cash settled futures contracts if the futures have the same expiration date and underlying instruments. With respect to a futures contract that is contractually required to "cash-settle" the Fund is permitted to maintain Segregated Assets in an amount equal to the Fund's daily marked-to-market (net) obligation (i.e. , the Fund's daily net liability, if any) rather than the notional value (in other words, the initial margin plus any variation margin (unrealized loss) due based on the previous day's trading). The total cover required for all cash-settled futures contracts may be determined by netting the aggregate obligations of such contracts. By setting aside assets equal to only its net obligation under cash-settled future contracts, the Fund will have the ability to employ leverage to a greater extent than if the Fund were required to segregate assets equal to the full notional value of such contracts. The value of any liquid assets held as initial or variation margin with an

FCM for a cash-settled or non-settled futures contract may be deemed physically segregated or earmarked for "cover" purposes so long as such assets are held in compliance with Rule 17f-6 under the Act.

The Fund may enter into futures contracts to protect against the adverse effects of fluctuations in security prices, interest rates without actually buying or selling the securities or foreign currency. For example, if interest rates are expected to increase, the Fund might enter into futures contracts for the sale of debt securities. Such a sale would have much the same effect as selling an equivalent value of the debt securities owned by the Fund. If interest rates did increase, the value of the debt securities in the portfolio would decline, but the value of the futures contracts to the Fund would increase at approximately the same rate, thereby keeping the net asset value of the Fund from declining as much as it otherwise would have. Similarly, when it is expected that interest rates may decline, futures contracts may be purchased to hedge in anticipation of subsequent purchases of securities at higher prices. Because fluctuations in the value of futures contracts should be similar to those of debt securities, the Fund could take advantage of the anticipated rise in value of debt securities without actually buying them until the market had stabilized. At that time, the futures contracts could be liquidated, and the Fund could then buy debt securities on the cash market. The Fund may also enter into futures contracts as a low cost method for gaining or reducing exposure to a particular currency or securities market without directly investing in those currencies or securities.

To the extent that market prices move in an unexpected direction, the Fund may not achieve the anticipated benefits of futures contracts or may realize a loss. For example, if the Fund is hedged against the possibility of an increase in interest rates, which would adversely affect the price of securities held in its portfolio, and interest rates decrease instead, the Fund would lose part or all of the benefit of the increased value that it has because it would have offsetting losses in its futures position. In addition, in such situations, if the Fund had insufficient cash, it may be required to sell securities from its portfolio to meet daily variation margin requirements. Such sales of securities may, but will not necessarily, be at increased prices that would reflect the rising market. The Fund may be required to sell securities at a time when it may be disadvantageous to do so.

Futures contracts that are traded on non-US exchanges may not be as liquid as those purchased on CFTC-designated contract markets. In addition, non-US futures contracts and exchanges may be subject to varied regulatory oversight. The price of any non-US futures contract and, therefore, the potential profit and loss thereon, may be affected by any change in the non-US exchange rate between the time a particular order is placed and the time it is liquidated, offset or exercised.

There is a risk of loss by the Fund of the initial and variation margin deposits in the event of bankruptcy of the FCM with which the Fund has an open position in a futures contract. The assets of the Fund may not be fully protected in the event of the bankruptcy of the FCM or central counterparty because the Fund might be limited to recovering only a pro rata share of all available funds and margin segregated on behalf of an FCM's customers. If the FCM does not provide accurate reporting, the Fund is also subject to the risk that the FCM could use the Fund's assets, which are held in an omnibus account with assets belonging to the FCM's other customers, to satisfy its own financial obligations or the payment obligations of another customer to the central counterparty.

Options on futures contracts

The Fund may purchase and write options on futures contracts in which it is allowed to invest. For more information about the risks of entering into futures contracts, see "Futures" above.

When the Fund buys an option on a futures contract, it pays a premium for the right, but does not have the obligation, to purchase (call) or sell (put) the futures contract at a set price (called the exercise price). The purchase of a call or put option on a futures contract is similar in some respects to the purchase of a call or put option on an individual security or currency. Depending on the premium paid for the option compared to either the price of the futures contract upon which it is based or the price of the underlying reference instrument, the option may be less risky than direct ownership of the futures contract or the underlying reference instrument. For example, the Fund could purchase a call option on a long futures contract when seeking to hedge against an increase in the market value of the underlying reference instrument, such as appreciation in the value of a non-US currency against the US dollar.

When the Fund writes an option on a futures contract, the Fund becomes contractually obligated to take the opposite futures position if the buyer of the option exercises its rights to the futures position specified in the option. In return for the premium paid by the buyer, the seller assumes the risk of taking a possibly adverse futures position, which could result in substantial and potentially unlimited losses. The writing of a call option on a futures contract constitutes a partial hedge against the declining price of the security or foreign currency that is deliverable upon exercise of the futures contract. If the futures price at the expiration of the option is below the exercise price, the Fund will retain the full amount of the option premium, which provides a partial hedge against any decline that may have occurred in the value of the Fund's investment portfolio holdings. The writing of a put option on a futures contract constitutes a partial hedge against the increasing price of the security or foreign currency that is deliverable upon exercise of the futures contract. If the futures price at the expiration of the option is higher than the exercise price, the Fund will retain the full amount of the option premium, which provides a partial hedge against any increase in the price of securities that the Fund intends to purchase.

Options on a stock index futures contract give the holder the right to receive cash. Upon exercise of the option, the delivery of the futures position by the writer of the option to the holder of the option will be accompanied by delivery of the accumulated balance in the writer's futures margin account, which represents the amount by which the market price of the futures contract, at exercise, exceeds, in the case of a call, or is less than, in the case of a put, the exercise price of the futures contract. If an option is exercised on the last trading day prior to the expiration date of the option, the settlement will be made entirely in cash equal to the difference between the exercise price of the option and the closing price of the futures contract on the expiration date. If a put or call option that the Fund has written is exercised, the Fund may incur a loss, which will be reduced by the amount of the premium it received. Depending on the degree of correlation between changes in the value of its portfolio securities and changes in the value of its options positions, the Fund's losses from existing options on futures may, to some extent, be reduced or increased by changes in the value of portfolio securities. For example, the Fund will purchase a put option on an interest rate futures contract to hedge the Fund's investment portfolio against the risk of rising interest rates.

Furthermore, with respect to options on futures contracts, the Fund may seek to close out an option position by writing or buying an offsetting position covering the same securities or contracts and have the same exercise price and expiration date. The ability to establish and close out positions on options will be subject to the maintenance of a liquid secondary market, which cannot be assured.

Special risks of certain derivatives

Certain derivative contracts entered into by the Fund may contain certain credit-risk related contingent features that could be triggered subject to certain circumstances. If triggered, the derivative counterparty could request additional cash margin and/or terminate the derivative contract.

Risks of potential regulation of swaps and other derivatives

It is not possible to predict fully the effects of current or future regulation. However, it is possible that developments in government regulation of various types of derivative instruments, such as speculative position limits on certain types of derivatives, or limits or restrictions on the counterparties with which the Fund engages in derivative transactions, may limit or prevent the Fund from using or limit a Fund's use of its investment strategy, and could adversely affect the Fund's ability to achieve its investment objective. The Advisor will continue to monitor developments in the area, particularly to the extent regulatory changes affect the Fund's ability to enter into desired swap agreements. New requirements, even if not directly applicable to the Fund, may increase the cost of the Fund's investments and cost of doing business.

Commodity pool operator exclusion

With respect to the Fund, the Advisor will claim an exclusion from the definition of CPO under the Commodity Exchange Act ("CEA") and the rules of the CFTC and, therefore, will not be subject to CFTC registration or regulation as a CPO. In addition, the Advisor will rely upon a related exclusion from the definition of "commodity trading advisor" ("CTA") under the CEA and the rules of the CFTC.

The terms of the CPO exclusion require the Fund, among other things, to adhere to certain limits on its investments in "commodity interests." Commodity interests include commodity futures, commodity options and swaps, which in turn include non-deliverable currency forwards, as further described in this SAI. Because the Advisor and the Fund intend to comply with the terms of the CPO exclusion, the Fund may, in the future, need to adjust its investment strategies, consistent with its investment objective, to limit its investments in these types of instruments. The Fund is not intended as a vehicle for trading in the commodity futures, commodity options or swaps markets. The CFTC has neither reviewed nor approved the Advisor's reliance on these exclusions, or the Fund, its investment strategies or this SAI.

Generally, the exclusion from CPO regulation on which the Advisor relies requires the Fund to meet one of the following tests for its commodity interest positions, other than positions entered into for bona fide hedging purposes (as defined in the rules of the CFTC): either (1) the aggregate initial margin and premiums required to establish the Fund's positions in commodity interests may not exceed 5% of the liquidation value of the Fund's portfolio (after taking into account unrealized profits and unrealized losses on any such positions); or (2) the aggregate net notional value of the Fund's commodity interest positions, determined at the time the most recent such position was established, may not exceed 100% of the liquidation value of the Fund's portfolio (after taking into account unrealized profits and unrealized losses on any such positions). In addition to meeting one of these trading limitations, the Fund may not be marketed as a commodity pool or otherwise as a vehicle for trading in the commodity futures, commodity options or swaps markets. If, in the future, the Fund can no longer satisfy these requirements, the Advisor would withdraw its notice claiming an exclusion from the definition of a CPO, and the Advisor would be subject to registration and regulation as a CPO with respect to the Fund, in accordance with CFTC rules that apply to CPOs of registered investment companies. Generally, these rules allow for substituted compliance with CFTC disclosure and shareholder reporting requirements, based on the Advisor's compliance with comparable SEC requirements.

However, as a result of CFTC regulation with respect to the Fund, the Fund may incur additional compliance and other expenses.

Illiquid securities

Effective December 1, 2018, the preceding paragraph is replaced with the following paragraph: The term "illiquid securities" includes any investment that the Fund reasonably expects cannot be sold or disposed of in current market conditions in seven calendar days or less without the sale or disposition significantly changing the market value of the investment, as classified by the Fund. In classifying securities as illiquid, the Fund will use information obtained after reasonable inquiry and take into account relevant market, trading, and investment-specific considerations. The Fund reviews liquidity classifications at least monthly, and more frequently if changes in relevant market, trading, and investment-specific considerations are reasonably expected to materially affect one or more of its investments' classifications.

The Fund may not be able to readily liquidate its investments in illiquid investments and may have to sell other investments if necessary to raise cash to meet its obligations. The lack of a liquid secondary market for illiquid investments may make it more difficult for the Fund to assign a value to those securities for purposes of valuing its portfolio and calculating its net asset value. The Advisor monitors the liquidity of investments in the Fund's portfolios and reports periodically on liquidity decisions to the Board. The Fund may not acquire any illiquid investment if, immediately after the acquisition, the Fund would have invested more than 15% of its net assets in illiquid investments that are assets.

Rule 144A

The Fund may invest in securities that are exempt under Rule 144A from the registration requirements of the 1933 Act. Those securities purchased under Rule 144A are traded among qualified institutional buyers.

Effective December 1, 2018, the preceding paragraph is replaced with the following paragraph: The Fund will classify the liquidity of a security exempt under Rule 144A using information obtained after reasonable inquiry and taking into account relevant market, trading, and investment-specific considerations. The restricted nature of a Rule 144A security is one factor considered by the Fund in evaluating the liquidity of a Rule 144A security. The Fund reviews liquidity classifications of a Rule 144A security at least monthly, and more frequently if changes in relevant market, trading, and investment-specific considerations are reasonably expected to materially affect one or more of its investments' classifications.

Investing in securities under Rule 144A could have the effect of increasing the level of the Fund's illiquidity to the extent that qualified institutional buyers become, for a time, uninterested in purchasing these securities. After the

purchase of a security under Rule 144A, however, the Trust and the Advisor will continue to monitor the liquidity of that security to ensure that the Fund has no more than 15% of its net assets in illiquid investments.

The Fund will limit investments in securities of issuers which the Fund is restricted from selling to the public without registration under the 1933 Act to no more than 15% of the Fund's net assets, excluding restricted securities eligible for resale pursuant to Rule 144A that have been determined to be liquid pursuant to a policy and procedures adopted by the Trust, on behalf of the Funds, which include continuing oversight by the Board.

If the Advisor determines that a security purchased in reliance on Rule 144A that was previously determined to be liquid, is no longer liquid and, as a result, the Fund's holdings of illiquid investments exceed the Fund's 15% limit on investment in such securities, the Advisor will determine what action shall be taken to ensure that the Fund continues to adhere to such a limitation, including disposing of illiquid assets which may include such Rule 144A securities.

Non-publicly traded securities, private placements and restricted securities

The Fund may invest in securities that are neither listed on a stock exchange nor traded OTC, including privately placed securities and limited partnerships. Investing in unregistered or unlisted securities, including investments in new and early stage companies, may involve a high degree of business and financial risk that can result in substantial losses. As a result of the absence of a public trading market for these securities, they may be less liquid than publicly traded securities. Although these securities may be resold in privately negotiated transactions, the prices realized from these sales could be less than those originally paid by the Fund, or less than what may be considered the fair value of such securities. Furthermore, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that would be applicable if their securities were publicly traded. If such securities are required to be registered under the securities laws of one or more jurisdictions before being resold, the Fund may be required to bear the expense of registration. Investments by the Fund in non-publicly traded securities, private placements and restricted securities will be limited by the Fund's prohibition on investing more than 15% of its net assets in illiquid investments.

Regulation S securities

The Fund may invest in the securities of US and non-US issuers that are issued through private offerings without registration with the SEC pursuant to Regulation S ("Regulation S Securities") under the 1933 Act. Offerings of Regulation S Securities may be conducted outside of the United States. Because Regulation S Securities are subject to legal or contractual restrictions on resale, Regulation S Securities may be considered illiquid. If a Regulation S Security is determined to be illiquid, the investment will be included with the Fund's 15% of net assets limitation on investment in illiquid investments. Furthermore, because Regulation S Securities are generally less liquid than registered securities, the Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Although Regulation S Securities may be resold in privately negotiated transactions, the price realized from these sales could be less than those originally paid by the Fund. Further, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that would be applicable if their securities were publicly traded. Accordingly, Regulation S Securities may involve a high degree of business and financial risk and may result in substantial losses.

Investment company securities and investments in affiliated investment companies

Subject to the provisions of any rules and regulations under the Act or exemptive orders issued thereunder, securities of other investment companies may be acquired by the Fund to the extent that such purchases are consistent with the Fund's investment objective and restrictions and are permitted under the Act. The Act requires that, as determined immediately after a purchase is made, (i) not more than 5% of the value of the Fund's total assets will be invested in the securities of any one investment company, (ii) not more than 10% of the value of the Fund's total assets will be invested in securities of investment companies as a group and (iii) not more than 3% of the outstanding voting stock of any one investment company will be owned by the Fund. Certain exceptions to these limitations

may apply. As a shareholder of another investment company, the Fund would bear, along with other shareholders, its pro rata portion of the other investment company's expenses, including advisory fees. These expenses would be in addition to the expenses that such Fund would bear in connection with its own operations.

The Fund may invest in securities issued by other registered investment companies advised by the Advisor, including portfolios of the UBS Relationship Funds, beyond the above percentage maximums pursuant to rules promulgated by the SEC and/or exemptive relief granted by the SEC to the extent that the Advisor determines that such investments are a more efficient means for the Fund to gain exposure to certain asset classes than by the Fund investing directly in individual securities. The Fund may only invest in portfolios of UBS Relationship Funds or other affiliated investment companies to the extent that the asset class exposure in such portfolios is consistent with the permissible asset class exposure for the Fund, had the Fund invested directly in securities, and the portfolios of such investment companies are subject to similar risks and limitations as the Fund.

Eurodollar securities

Foreign securities

Investors should recognize that investing in foreign issuers involves certain considerations, including those set forth in the Fund's Prospectus, which are not typically associated with investing in US issuers. Because the stocks of foreign companies are frequently denominated in foreign currencies, and because the Fund may temporarily hold uninvested reserves in bank deposits in foreign currencies, the Fund will be affected favorably or unfavorably by changes in currency rates and in exchange control regulations and may incur costs in connection with conversions between various currencies.

Emerging markets investments

The Fund may invest in debt securities of corporate issuers in developing countries and fixed income securities of emerging market issuers, including government and government-related entities (including participation in loans between governments and financial institutions), and of entities organized to restructure outstanding debt of such issuers.

The Fund's investments in emerging market government and government-related securities may consist of: (i) debt securities or obligations issued or guaranteed by governments, governmental agencies or instrumentalities and political subdivisions located in emerging market countries (including participation in loans between governments and financial institutions), (ii) debt securities or obligations issued by government owned, controlled or sponsored entities located in emerging market countries and (iii) interests in issuers by any of the entities described above.

The Fund's investments in the fixed income securities of emerging market issuers may include investments in Structured Securities, Brady Bonds (as such capitalized terms are defined below) and certain non-publicly traded securities.

The Fund may invest in fixed rate and floating rate loans ("Loans") arranged through private negotiations between an issuer of sovereign debt obligations and one or more financial institutions ("Lenders"). The Fund's investments in Loans are expected in most instances to be in the form of a participation in loans ("Participation") and assignments of all or a portion of Loans ("Assignments") from third parties. The Fund will have the right to receive payments of principal, interest and any fees to which they are entitled only from the Lender selling the Participation and only upon receipt by the Lender of the payments from the borrower. In the event of the insolvency of the Lender selling a Participation, the Fund may be treated as a general creditor of the Lender and may not benefit from any set-off between the Lender and the borrower. Certain Participations may be structured in a manner designed to avoid subjecting purchasers of Participations to the credit risk of the Lender with respect to the Participations. Even under such a structure, in the event of the Lender's insolvency, the Lender's servicing of the Participation may be delayed and the assignability of the Participation may be impaired. The Fund will acquire the Participations only if the Lender interpositioned between the Fund and a borrower is determined by the Advisor to be creditworthy.

When the Fund purchases Assignments from Lenders, it will acquire direct rights against the borrower on the Loan. However, because Assignments are arranged through private negotiations between potential assignees and potential assignors, the rights and obligations acquired by the Fund as the purchaser of an Assignment may differ from, and be more limited than, those held by the assigning Lender.

The Fund may invest in Brady Bonds, which are securities created through the exchange of existing commercial bank loans to public and private entities in certain emerging markets for new bonds in connection with debt restructurings under a debt restructuring plan introduced by former US Secretary of the Treasury, Nicholas F. Brady (the "Brady Plan"). Brady Plan debt restructurings have been implemented to date in Argentina, Bulgaria, Brazil, Costa Rica, the Dominican Republic, Ecuador, Ivory Coast, Jordan, Mexico, Morocco, Nicaragua, Nigeria, Panama,

Peru, the Philippines, Poland, Russia, Uruguay, Venezuela and Vietnam. Brady Bonds may be collateralized or uncollateralized, are issued in various currencies (but primarily the US dollar), and are actively traded in OTC secondary markets. Dollar-denominated, collateralized Brady Bonds, which may be fixed-rate bonds or floating-rate bonds, are generally collateralized in full as to principal by US Treasury zero coupon bonds having the same maturity as the bonds.

The Fund also may invest in securities that neither are listed on a stock exchange nor traded OTC, including privately placed securities and limited partnerships. Investing in such unlisted emerging market equity securities, including investments in new and early stage companies, may involve a high degree of business and financial risk that can result in substantial losses. As a result of the absence of a public trading market for these securities, they may be less liquid than publicly traded securities.

Risks of investing in emerging markets

There are additional risks inherent in investing in less developed countries that are applicable to the Fund. An emerging market country is a country defined as an emerging or developing economy by any of the World Bank, the International Finance Corporation or the United Nations or its authorities. Additionally, the Fund, for purposes of its investments, may consider a country included in JP Morgan or MSCI emerging markets indices to be an emerging market country. The countries included in this definition will change over time. An emerging market security is a security issued by a government or other issuer that, in the opinion of the Advisor, has one or more of the following characteristics: (i) the security's principal trading market is an emerging market; (ii) at least 50% of the issuer's (or the issuer's parent company's) revenue is generated from goods produced or sold, investments made, or services performed in emerging market countries; (iii) at least 50% of the issuer's (or the issuer's parent company's) physical assets are located in emerging market countries; (iv) at least 50% of the issuer's (or the issuer's parent company's) economic activities are in emerging market countries; or (v) the principal place of business of the issuer (or the issuer's parent company) is an emerging market country. In addition, an emerging market security includes derivative instruments on emerging market securities or indices.

Compared to the United States and other developed countries, emerging countries may have relatively unstable governments, economies based on only a few industries and securities markets that trade only a small number of securities and employ settlement procedures different from those used in the United States. Prices on these exchanges tend to be volatile and, in the past, securities in these countries have offered greater potential for gain (as well as loss) than securities of companies located in developed countries. Further, investments by foreign investors are subject to a variety of restrictions in many emerging countries. Countries such as those in which the Fund may invest have historically experienced, and may continue to experience, high rates of inflation, high interest rates, exchange rate fluctuations or currency depreciation, large amounts of external debt, balance of payments and trade difficulties and extreme poverty and unemployment. Additional factors that may influence the ability or willingness to service debt include, but are not limited to: a country's cash flow situation; the availability of sufficient foreign exchange on the date a payment is due; the relative size of its debt service burden to the economy as a whole; its government's policy towards the IMF, the World Bank and other international agencies; and the political constraints to which a government debtor may be subject.

As a result of the foregoing, a governmental issuer may default on its obligations. If such a default occurs, the Fund may have limited effective legal recourse against the issuer and/or guarantor. Remedies must, in some cases, be pursued in the courts of the defaulting country itself, and the ability of the holder of foreign government and government-related debt securities to obtain recourse may be subject to the political climate in the relevant country. In addition, no assurance can be given that the holders of commercial bank debt will not contest payments to the holders of other foreign government and government-related debt obligations in the event of default under their commercial bank loan agreements.

The issuers of the government and government-related debt securities in which the Fund expects to invest have in the past experienced substantial difficulties in servicing their external debt obligations, which has led to defaults on certain obligations and the restructuring of certain indebtedness. Restructuring arrangements have included, among other things, reducing and rescheduling interest and principal payments by negotiating new or amended credit agreements or converting outstanding principal and unpaid interest to Brady Bonds, and obtaining new credit to finance interest payments. Holders of certain foreign government and government-related debt securities may be requested to participate in the restructuring of such obligations and to extend further loans to their issuers. There can be no assurance that the Brady Bonds and other foreign government and government-related debt securities in which the Fund may invest will not be subject to similar defaults or restructuring arrangements which may adversely affect the value of such investments. Furthermore, certain participants in the secondary market for such debt may be directly involved in negotiating the terms of these arrangements and may therefore have access to information not available to other market participants.

Payments to holders of the high yield, high risk, foreign debt securities in which the Fund may invest may be subject to foreign withholding and other taxes. Although the holders of foreign government and government-related debt securities may be entitled to tax gross-up payments from the issuers of such instruments, there is no assurance that such payments will be made.

Issuer location

organized under the laws of, derives at least 50% of its revenues from, or has at least 50% of its assets in a particular country; the investment is included in an index representative of a particular country or region; and the investment is exposed to the economic fortunes and risks of a particular country.

Short sales

The Fund may, from time to time, sell securities short. In a short sale, the Fund sells a security it does not own in anticipation of a decline in the market value of that security. To complete the transaction, the Fund must borrow the security to make delivery to the buyer. The Fund is then obligated to replace the security borrowed by purchasing it at the market price at the time of replacement. Until the security is replaced, the Fund must pay the lender any dividends or interest that accrues during the period of the loan. To borrow the security, the Fund may also be required to pay a premium, which would increase the cost of the security sold. The proceeds of the short sale (which may be invested in equity securities) will be retained by the broker, to the extent necessary to meet margin requirements, until the short position is closed out.

The Fund will incur a loss as a result of the short sale if the price of the security increases between the date of the short sale and the date on which the Fund replaces the borrowed security, and the Fund will realize a gain if the security declines in price between those same dates. The amount of any gain will be decreased, and the amount of any loss increased, by the amount of any premium, dividends or interest the Fund is required to pay in connection with the short sale. Because the Fund's loss on a short sale arises from increases in the value of the security sold short, such loss, like the potential increase in price of the security sold short, is theoretically unlimited. In addition, the Fund's securities held long could decline in value at the same time the value of the security sold short increases, thereby increasing the Fund's potential for loss.

Until the Fund replaces a borrowed security, the Fund will designate Segregated Assets in an amount equal to its obligation to purchase the stocks sold short, as required by law. The amount segregated in this manner will be increased or decreased each business day to equal the change in market value of the Fund's obligation to purchase the security sold short. If the lending broker requires the Fund to deposit additional collateral (in addition to the short sales proceeds that the broker holds during the period of the short sale), the amount of the additional collateral may be deducted in determining the amount of cash or liquid assets the Fund is required to segregate to cover the short sale obligation. The amount segregated must be unencumbered by any other obligation or claim than the obligation that is being covered. The Advisor and the Fund believe that short sale obligations that are covered, either by an offsetting asset or right (acquiring the stock sold short or having an option to purchase the stock sold short at a exercise price that covers the obligation), or by the Fund's Segregated Assets procedures (or a combination thereof), are not senior securities under the Act and are not subject to the Fund's borrowing restrictions. The Fund is also required to repay the lender of the stock any dividends or interest that accrues on the stock during the period of the loan.

Fixed income securities

credit risk. Other securities issued by agencies and instrumentalities sponsored by the US government that are supported only by the issuer's right to borrow from the US Treasury, subject to certain limitations, such as securities issued by Federal Home Loan Banks, and securities issued by agencies and instrumentalities sponsored by the US government that are supported only by the credit of the issuing agencies are subject to a greater degree of credit risk.

Any controversy or ongoing uncertainty regarding the status of negotiations in the US Congress to increase the statutory debt ceiling could increase the risk that the US government may default on payments on certain US government securities, including those held by the funds, which could have a material adverse impact on the funds. In recent years, the long-term US credit rating was downgraded by at least one major rating agency as a result of disagreements within the US government over raising the debt ceiling to repay outstanding obligations, and similar situations in the future could increase volatility in both stock and bond markets, result in higher interest rates, lower prices of US Treasury securities and increase the costs of different kinds of debt. It is at least theoretically possible that under certain scenarios the US government could default on its debt, including US Treasuries. UBS AM cannot predict the effects of these or similar events in the future on the US economy and securities markets or on the Fund's portfolio.

Yield factors

Duration

Duration allows the Advisor to make certain predictions as to the effect that changes in the level of interest rates will have on the value of the Fund's portfolio of bonds. For example, when the level of interest rates increases by

1%, a bond having a positive duration of three years generally will decrease by approximately 3%. Thus, if the Advisor calculates the duration of the Fund's portfolio of bonds as three years, it normally would expect the portfolio to change in value by approximately 3% for every 1% change in the level of interest rates. However, various factors, such as changes in anticipated prepayment rates, qualitative considerations and market supply and demand, can cause particular securities to respond somewhat differently to changes in interest rates than indicated in the above example. Moreover, in the case of mortgage-backed and other complex securities, duration calculations are estimates and are not precise. This is particularly true during periods of market volatility. Accordingly, the net asset value of the Fund's portfolio of bonds may vary in relation to interest rates by a greater or lesser percentage than indicated by the above example.

Development bank bonds

The Fund will invest substantially all of its assets in development bank bonds. Development banks are financial organizations formed by government entities to promote economic and social development. Development banks generally use their capital for projects that seek to improve the state of the developing world, promote sustainable growth, and raise living standards. The value of the Fund's investments in bonds issued by development banks may fall due to adverse financial market developments in the US and abroad. Borrowers from development banks include foreign countries, which may include emerging market countries, and borrowers of specific development banks also include the private sector with or without government guarantee. Therefore, negative economic, social and political developments could affect the ability of a borrower to repay its loan to the development bank and thus affect its financial condition. In addition, investments in such development bank bonds may involve special risks because the Fund may have limited legal recourse in the event of default. Also, development bank bonds may sometimes be less liquid and more difficult to sell and to value than high-quality securities of US issuers. Bonds issued by a development bank are backed by the shareholders of the development bank. The development bank may be supported via various mechanisms, including preferred creditor status, equity injections by its shareholders and callable capital, even though the latter may never been tested with respect to an issuer. Changes in the shareholder structure of a development bank or changes in the strength of the support by its shareholders could affect the credit rating and thus the value of the bonds issued by the development bank.

Floating rate and variable rate obligations

When-issued and delayed delivery securities

Asset-backed securities

Such receivables are securitized in either a pass-through or a pay-through structure. Pass-through securities provide investors with an income stream consisting of both principal and interest payments in respect of the receivables in the underlying pool. Pay-through asset-backed securities are debt obligations issued usually by a special purpose entity. The securities are collateralized by the various receivables and the payments on the underlying receivables provide the proceeds to pay the debt service on the debt obligations issued. The Fund may invest in these and other types of asset-backed securities that may be developed in the future.

Zero coupon and delayed interest securities

Other investments

The Board may, in the future, authorize the Fund to invest in securities other than those listed in this SAI and in the Prospectus, provided such investment would be consistent with the Fund's investment objective and that it would not violate any fundamental investment policies or restrictions applicable to the Fund.

Summary of risks

The principal risks of investing in the Fund are described in the risks sections of the Prospectus.

Cybersecurity risk

The Fund, like all companies, may be susceptible to operational and information security risks. Cybersecurity failures or breaches of the Fund or its service providers or the issuers of securities in which the Fund invests have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, the inability of Fund shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, and/or additional compliance costs. The Fund and its shareholders could be negatively impacted as a result.

Investment restrictions

The investment restrictions set forth below are fundamental policies and may not be changed as to the Fund without the approval of a majority of the outstanding voting securities (as defined in the Act) of the Fund. Unless otherwise indicated, all percentage limitations listed below apply to the Fund only at the time of the transaction. Accordingly, if a percentage restriction is adhered to at the time of investment, a later increase or decrease in the percentage that results from a relative change in values or from a change in the Fund's total assets will not be considered a violation. The Fund may not:

(i) Purchase or sell real estate, except that the Fund may purchase or sell securities of real estate investment trusts;

(ii) Purchase or sell commodities, except to the extent permitted by the 1940 Act or any rules, exemptions or interpretations thereunder that may be adopted, granted or issued by the SEC;

(vi) Concentrate (invest more than 25% of its net assets) in securities of issuers in a particular industry (other than securities issued or guaranteed by the US government or any of its agencies); except that the Fund will, under normal circumstances, invest at least 25% of its net assets in issuers related to development banks; and

(vii) Act as an underwriter, except to the extent the Fund may be deemed to be an underwriter when selling its own shares.

With respect to the real estate restriction described in (i) above, the restriction does not prevent the Fund from investing in REITs or similar real estate securities.

Management of the Trust

Organization of the Board

The Board is responsible for establishing the Trust's policies and for overseeing the management of the Trust and the Fund. The Board appoints the officers of the Trust, who, along with third-party service providers, are responsible for administering the day-to-day operations of the Trust. The Board is comprised of five trustees that are not considered to be "interested persons" by reason of their relationship with the Trust's management or otherwise as defined under the Act ("Independent Trustees"). Frank K. Reilly, an Independent Trustee, is Chairman of the Board. As Chairman of the Board, Mr. Reilly approves agendas for Board meetings and generally facilitates communication and coordination among the Independent Trustees and between the Independent Trustees and management. Ms. Adela Cepeda acts as liaison between the Trust's Chief Compliance Officer ("CCO") and the Independent Trustees with respect to compliance matters between scheduled Board meetings.

Board oversight of risk management

With respect to investment risk, the Board receives regular written reports describing and analyzing the investment performance of the Fund. The Board discusses these reports and the performance of the Fund and investment risks with management of the Advisor at the Board's regular meetings. To the extent that the Advisor seeks to change the Fund's investment strategy that may have a material impact on the Fund's risk profile or invest in a new type of security or instrument, the Board generally is provided information on such proposed changes for the Board's approval. In addition, the Advisor provides, at the request of the Board, an annual report on the use of derivatives by the Fund.

With respect to valuation, the Advisor provides regular written reports to the Board that enables the Board to monitor fair valued securities in the Fund. Such reports also include information concerning illiquid securities held by the Fund. In addition, the Audit Committee reviews valuation procedures and pricing results with the Trust's independent registered public accounting firm in connection with such Committee's review of the results of the audit of the Fund's year-end financial statements.

At the request of the Board, the Advisor also has provided presentations to the Board with respect to the Advisor's operational risk management.

Trustee qualifications

(ii) has been a shareholder of at least 1/2 of 1% of the Trust's total outstanding shares for 12 months or more prior to submitting the recommendation to the Nominating Committee. In order to recommend a nominee, a Qualifying Fund Shareholder should send a letter to the chairperson of the Nominating Committee, Adela Cepeda, care of Mark Kemper, the Secretary of the Trust, at UBS Asset Management, One North Wacker Drive, Chicago, Illinois 60606, and indicate on the envelope "Nominating Committee." The Qualifying Fund Shareholder's letter should include: (i) the name and address of the Qualifying Fund Shareholder making the recommendation; (ii) the number of shares of each class and series of shares of the Trust that are owned of record and beneficially by such Qualifying Fund Shareholder and the length of time that such shares have been so owned by the Qualifying Fund Shareholder; (iii) a description of all arrangements and understandings between such Qualifying Fund Shareholder and any other person or persons (naming such person or persons) pursuant to which the recommendation is being made; (iv) the name and address of the nominee; and (v) the nominee's resume or curriculum vitae. The Qualifying Fund Shareholder's letter must be accompanied by a written consent of the individual to stand for election if nominated for the Board and to serve if elected by shareholders.

Independent trustees

Name,
address,
and age

Position(s) held
with trust

Term of office¹and length of
time served

Principal occupation(s)
during past 5 years

Number of portfolios
in fund complex
overseen by trustee

Other directorships held
by trustee during
past 5 years

Adela Cepeda; 60
PFM Financial Advisors LLC,
222 N. LaSalle Street
Suite 910
Chicago, IL 60601

Trustee

Since 2004

Ms. Cepeda is managing director of PFM Financial Advisors LLC (since 2016). From 1995 to 2016, Ms. Cepeda was the founder and president of A.C. Advisory, Inc.

Ms. Cepeda is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Ms. Cepeda is a director (since 2012) of BMO Financial Corp. (US holding company for the BMO Harris Bank N.A.), director of the Mercer Funds (9 portfolios) (since 2005) and trustee of the Morgan Stanley Smith Barney Consulting Group Capital Markets Funds (11 portfolios) (since 2008).

John J. Murphy;
74
268 Main Street
P.O. Box 718
Gladstone, N.J. 07934

Trustee

Since 2009

Mr. Murphy is the president of Murphy Capital Management (investment advisor) (since 1983).²

Mr. Murphy is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Mr. Murphy is director (since 2007) of the Legg Mason Equity Funds (54 portfolios); and is a trustee of Morgan Stanley Smith Barney Consulting Group Capital Markets Funds (11 portfolios).

Frank K. Reilly; 82
Mendoza College of Business University of Notre Dame
Notre Dame, IN 46556-5646

Chairperson and Trustee

Since 1992

Mr. Reilly is the Bernard J. Hank Professor Emeritus of Finance in the Mendoza College of Business at the University of Notre Dame (since 1982) and is a Chartered Financial Analyst (CFA).

Mr. Reilly is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Name,
address,
and age

Position(s) held
with trust

Term of office¹and length of
time served

Principal occupation(s)
during past 5 years

Number of portfolios
in fund complex
overseen by trustee

Other directorships held
by trustee during
past 5 years

Abbie J. Smith; 65
University of Chicago Booth School of Business
5807 S. Woodlawn Avenue
Chicago, IL 60637

Trustee

Since 2009

Ms. Smith is a Boris and Irene Stern Distinguished Service Professor of Accounting in the University of Chicago Booth School of Business (since 1980). Formerly, Ms. Smith was a co-founding partner and director of research of Fundamental Investment Advisors, a hedge fund (co-founded in 2004, commenced operations in 2008) (from 2008 to 2010).

Ms. Smith is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Ms. Smith is a director (since 2000) of HNI Corporation (formerly known as HON Industries Inc.) (office furniture) and a director and member (since 2003), and also a member of the audit committee (since May 2017). Ms. Smith was also chair (until 2015) of the audit committee of Ryder System Inc. (transportation, logistics and supply-chain management). In addition, Ms. Smith is a trustee/director (since 2000) and a member of the audit committee of the Dimensional Funds complex (128 portfolios).

J. Mikesell Thomas; 67
c/o UBS AM
One North Wacker Drive
Chicago, IL 60606

Trustee

Since 2004

Mr. Thomas is a trustee of three investment companies (consisting of 19 portfolios) for which UBS AM (Americas) serves as investment advisor or manager.

Mr. Thomas is a director (since 1992) and chairman of the audit committee for Northshore University Health System, a not-for-profit healthcare organization, and a director and member (since 2016) of the audit committee of four indirect subsidiaries of Tokio Marine Holdings, Inc., a publicly traded insurance company headquartered in Tokyo, Japan: HCC Life Insurance Co., US Specialty Insurance Co., Houston Casualty Co., and Producers Agriculture Insurance Co. Mr. Thomas was previously a director (2012-2015), a member of the audit committee (2012-2015) and chairman of the investment and finance committees (2014-2015) of HCC Insurance Holdings Inc.; and a director of First Chicago Bancorp (from 2008 to 2010) and First Chicago Bank & Trust (from 2008 to 2010).

¹ Each Trustee holds office for an indefinite term.

Officers

Name,
address,
and age

Position(s) held
with trust

Term of office¹and length of
time served

Principal occupation(s) during past 5 years

Rose Ann Bubloski*
Age: 50

Vice President and Assistant Treasurer

Since 2011

Ms. Bubloski is a director (since 2012) (prior to which she was an associate director (from 2008 to 2012)) and senior manager of product control and investment support (previously named registered fund product control) of UBS Asset Management (Americas) Inc. and/or UBS Asset Management (US) Inc. ("UBS AM—Americas region"). Ms. Bubloski is vice president and assistant treasurer of 10 investment companies(consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Franklin P. Dickson*
Age: 40

Vice President

Since December 2017

Mr. Dickson is an associate director (since 2015) and tax compliance manager (since October 2017) (prior to which he was a product controller (from 2015 to 2017) of product control and investment support (previously named registered fund product control of UBS AM—Americas region). From 2013 through 2015, Mr. Dickson was fund administration and compliance manager for US Bancorp Fund Services, LLC, and from April 2008 through June 2013, Mr. Dickson was vice president, client service manager at BNY Mellon Asset Servicing. Mr. Dickson is a vice president of 10 investment companies (consisting of 64 portfolios) for which UBS AM serves as investment advisor or manager.

Mark F. Kemper***
Age: 60

Vice President and Secretary

Since 1999

Joanne M. Kilkeary*
Age: 50

Vice President, Treasurer and Principal Accounting Officer

Since 2006 and 2017 respectively

Igor Lasun*
Age: 39

President

Since September 2018

Name,
address,
and age

Position(s) held
with trust

Term of office¹and length of
time served

Principal occupation(s) during past 5 years

William Lawlor***
Age: 31

Vice President and Assistant Secretary

Since June 2018

Mr. Lawlor is a director and associate general counsel with UBS Business Solutions US LLC (since January 2017) and also with UBS AM—Americas region (since 2013). Prior to joining UBS AM—Americas region, Mr. Lawlor attended Kent College of Law, where he graduated in 2013. Mr. Lawlor is a vice president and assistant secretary of 10 investment companies (consisting of 64 portfolios) for which UBS AM services as investment advisor or manager.

Nancy D. Osborn*
Age: 52

Vice President and Assistant Treasurer

Since 2007

Frank S. Pluchino**
Age: 59

Chief Compliance Officer

Since March 2018

Eric Sanders*
Age: 53

Vice President and Assistant Secretary

Since 2005

Philip Stacey***
Age: 33

Vice President and Assistant Secretary

Since June 2018

Keith A. Weller*
Age: 57

Vice President and Assistant Secretary

Since 2004

¹ Officers of the Trust are appointed by the Trustees and serve at the pleasure of the Board.

* This person's business address is 1285 Avenue of the Americas, New York, NY 10019.

** This person's business address is 787 Seventh Avenue, New York, NY 10019.

*** This person's business address is One North Wacker Drive, Chicago, IL 60606.

Information about trustee ownership of Fund shares

Trustee	Dollar range of equity securities in the Fund¹	Aggregate dollar range of equity securities in all registered investment companies overseen by trustee for which UBS AM or an affiliate serves as Investment advisor, sub-advisor or manager¹
*Independent Trustees*
Adela Cepeda	None	$10,001 – $50,000
John J. Murphy	None	None
Frank K. Reilly	None	Over $100,000
Abbie J. Smith	None	Over $100,000
J. Mikesell Thomas	None	None

¹ Information regarding ownership is as of December 31, 2017. The Fund has not yet commenced operations as of the date of this SAI.

Note regarding ranges: In disclosing the dollar range of equity securities beneficially owned by a Trustee in these columns, the following ranges will be used: (i) none; (ii) $1 – $10,000; (iii) $10,001 – $50,000; (iv) $50,001 – $100,000; or (v) over $100,000.

Compensation table

Trustees

Name and position held	Annual aggregate compensation from the trust¹		Pension or retirement benefits accrued as part of fund expenses		Total compensation from the trust and fund complex paid to trustees²
Adela Cepeda	$	82,958		N/A	$	167,500
John J. Murphy		79,244		N/A		160,000
Frank K. Reilly		89,149		N/A		180,000
Abbie J. Smith		79,244		N/A		160,000
J. Mikesell Thomas		86,673		N/A		175,000

¹ Represents aggregate annual compensation paid by the Trust to each Trustee indicated for the fiscal year ended June 30, 2018.

²This amount represents the aggregate amount of compensation paid to the Trustees for service on the Board of Trustees of three registered investment companies managed by UBS AM (Americas) or an affiliate for the fiscal year ended June 30, 2018.

No officer or Trustee of the Trust who is also an officer or employee of the Advisor receives any compensation from the Trust for services to the Trust.

Principal holders of securities

As of the date of this SAI, the Fund has not yet commenced operations.

Investment advisory, principal underwriting and other service arrangements

Advisor

UBS Asset Management (Americas) Inc., with its principal offices located at One North Wacker Drive, Chicago, IL 60606 and at 1285 Avenue of the Americas, New York, NY 10019, manages the assets of the Trust pursuant to its investment advisory agreement with the Fund (the "Agreement"). The Advisor is an investment management firm managing approximately $171 billion, as of June 30, 2018. The Advisor is an indirect asset management subsidiary of UBS Group AG and a member of the UBS Asset Management Division, which had approximately $817 billion in assets under management as of June 30, 2018. The Advisor is also an affiliate of UBS Financial Services Inc., which provides certain sub-transfer agency and administration services to the Fund.

Pursuant to its Agreement with the Trust, on behalf of the Fund, the Advisor receives from the Fund a monthly fee at an annual rate (as described in the Prospectus and below) multiplied by the average daily net assets of the Fund for providing investment advisory services. The Advisor is responsible for paying its expenses. The Fund pays the following expenses: (1) the fees and expenses of the Trust's Trustees who are not interested persons (as defined in the Act) of the Trust by reason of affiliation with UBS AM (Americas) or any of UBS AM (Americas)'s affiliates; (2) the salaries and expenses of any of the Trust's officers or employees who are not affiliated with the Advisor; (3) interest expenses; (4) taxes and governmental fees; (5) brokerage commissions and other expenses incurred in acquiring or disposing of portfolio securities; (6) the expenses of registering and qualifying shares for sale with the SEC and with various state securities commissions; (7) auditing and legal costs; (8) insurance premiums; (9) fees and expenses of the Trust's custodian, administrator and transfer agent and any related services; (10) expenses of obtaining quotations of the Fund's portfolio securities and of pricing the Fund's shares; (11) expenses of maintaining the Trust's legal existence and of shareholders' meetings; (12) expenses of preparation and distribution to existing shareholders of reports, proxies and prospectuses; and (13) fees and expenses of membership in industry organizations.

Under the Agreement, the Advisor is entitled to a monthly fee of the Fund's average daily net assets equal to annual rates as set forth below:

	Advisory fee breakpoint schedule
Fund	Assets under management	Fee
UBS Sustainable Development Bank Bond Fund	$0 – $250 million On the next $250 million – $500 million On the next $500 million – $750 million On the next $750 million – $1 billion Above $1 billion		0.150 0.145 0.140 0.135 0.130	%

The Fund and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive its management fees and retained administration fees, and to reimburse expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) to the extent necessary so that the Fund's ordinary operating expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) through the period ending October 29, 2019, do not exceed the following rate:

Fund				Class P2
UBS Sustainable Development Bank Bond Fund					0.15	%

Pursuant to the expense limitation agreement, the Advisor is entitled to be reimbursed for any expenses it reimburses to the extent such reimbursement can be made during the three fiscal years following the date on which such expense reimbursements were made, provided that the reimbursement of the Advisor by the Fund will not cause the Fund to exceed the lesser of any applicable expense limit that is in place for the Fund (i) at the time of the reimbursement, or (ii) at the time of the recoupment. The expense limitation agreement may be terminated by the Fund's Board of Trustees at any time and also will terminate automatically upon the expiration or termination of the Fund's advisory contract with the Advisor. Upon termination of the expense limitation agreement, however, the Advisor's three year recoupment rights will survive.

General expenses of the Trust (such as costs of maintaining corporate existence, legal fees, insurance, etc.) will be allocated to the series of the Trust in proportion to its relative net assets. Expenses that relate exclusively to a series of the Trust, such as certain registration fees, brokerage commissions and other portfolio expenses, will be borne directly by the series of the Trust.

Portfolio managers

Presented below is information about the individual identified as portfolio manager of the Fund in the Fund's Prospectus.

The following table provides information relating to other accounts managed by the portfolio manager as of June 30, 2018:

	Registered investment companies				Other pooled investment vehicles				Other accounts
Portfolio manager	Number		Assets managed (in millions)		Number		Assets managed (in millions)		Number		Assets managed (in millions)
Matthias Dettwiler		0	$	0		24	$	11,549		10	$	9,883

The portfolio management team's management of the Fund and other accounts could result in potential conflicts of interest if the Fund and other accounts have different objectives, benchmarks and fees because the portfolio management team must allocate its time and investment expertise across multiple accounts, including the Fund. A portfolio manager and his or her team manage the Fund and other accounts utilizing a model portfolio approach that groups similar accounts within a model portfolio. The portfolio management team manages accounts according to the appropriate model portfolio, including where possible, those accounts that have specific investment restrictions. Accordingly, portfolio holdings, position sizes and industry and sector exposures tend to be similar across accounts, which may minimize the potential for conflicts of interest.

Fixed component (base salary and benefits):

• Set with the aim of being competitive in the industry and monitored and adjusted periodically with reference to the relevant local labor market in order to remain so.

• The fixed component is used to recognize the experience, skills and knowledge that each portfolio manager or analyst brings to their role.

Performance award:

• Determined annually on a discretionary basis.

• Delivered in cash and, when total compensation is over a defined threshold, partly in deferral vehicles.

• For awards subject to deferral, the deferred amount is calculated using graduated marginal deferral rates, which increase as the value of the performance award increases.

• Deferred amounts are then delivered via two deferral vehicles—75% in the UBS Asset Management Equity Ownership Plan (AM EOP) and 25% in the Deferred Contingent Capital Plan (DCCP):

The DCCP aligns the interests of our key employees with the interests of external investors and, alongside the AM EOP, ensures an appropriate balance between client and other stakeholder alignment.

For our Equities, Fixed Income, Investment Solutions and Passive investment areas:

As of October 22, 2018, the portfolio manager identified above owned no shares of the Fund because the Fund had not yet been publicly offered.

Administrative, accounting and custody services

Administrative and accounting services. UBS AM (Americas) also serves as the Fund's administrator. The Administrator is an indirect wholly owned asset management subsidiary of UBS Group AG.

As administrator, UBS AM (Americas) supervises and manages all aspects (other than investment advisory activities) of the Trust's operations. Under the Administration Contract, the Administrator will not be liable for any error of judgment or mistake of law or for any loss suffered by the Fund, the Trust or any of its shareholders in connection with the performance of the Administration Contract, except to the extent that such a loss results from negligence, willful misfeasance, bad faith or gross negligence on the part of the Administrator in the performance of its duties or from reckless disregard of its duties and obligations thereunder. The Administration Contract is terminable at any time without penalty by the Board or by vote of the holders of a majority of the Fund's outstanding voting securities, on 60 days' written notice to the Administrator, or by the Administrator on 60 days' written notice to the Trust. The Fund pays a fee to the Administrator that is computed daily and paid monthly at an annual rate of 0.075% of average daily net assets of such Fund.

UBS AM (Americas) has entered into a Sub-Administration Contract with State Street Bank and Trust Company ("State Street") to provide accounting, portfolio valuation and certain sub-administrative services for the Fund. UBS AM (Americas) pays State Street for the services it provides under the Sub-Administration Contract.

Custody services. State Street, located at One Lincoln Street, Boston, Massachusetts 02111, provides custodian services for the securities and cash of the Fund and employs foreign sub-custodians in accordance with applicable requirements under the Act to provide custody of the Fund's foreign securities and cash. State Street maintains certain books and records of the Fund that are required by applicable federal regulations.

Principal underwriting arrangements

UBS Asset Management (US) Inc. (the "Underwriter"), with its principal office located at 1285 Avenue of the Americas, New York, New York 10019-6028, acts as the principal underwriter of each class of shares of the Fund pursuant to a Principal Underwriting Contract with the Trust. The Principal Underwriting Contract requires the Underwriter to use its best efforts, consistent with its other businesses, to sell shares of the Fund. Shares of the Fund are offered continuously. The Underwriter may enter into dealer agreements with other broker-dealers (affiliated and non-affiliated) and with other financial institutions to authorize them to sell Fund shares.

UBS AM (US) may also make cash and non-cash payments to banks, broker-dealers, insurance companies, financial planning firms and other financial intermediaries (collectively, "Financial Intermediaries"), that sell shares of the Fund, subject to UBS AM (US)'s internal policies and procedures. The source of such payments may come from the underwriter's own resources (including through transfers from affiliates). Payments made out of the underwriter's own resources are often referred to as "revenue sharing." UBS AM (US) provides Financial Intermediaries with sales literature and advertising materials relating to the registered investment companies advised by UBS AM (US). UBS AM (US) also shares expenses with Financial Intermediaries for costs incurred in hosting seminars for employees and clients of Financial Intermediaries, subject to UBS AM (US)'s internal policies and procedures governing payments for such seminars. These seminars may take place at UBS AM (US)'s headquarters or other appropriate locations and may include reimbursement of travel expenses (i.e., transportation, lodging and meals) of employees of Financial Intermediaries in connection with training and education seminars. Subject to UBS AM (US)'s internal policies and procedures, UBS AM (US) may provide any or all of the following to employees of Financial Intermediaries and their guest(s): (i) an occasional meal, a sporting event or theater ticket or other comparable entertainment; (ii) gifts of less than $100 per person per year; and/or (iii) UBS AM (US)'s promotional items of nominal value (golf balls, shirts, etc.).

In addition, Financial Intermediaries may maintain omnibus accounts and/or have similar arrangements with UBS AM (US) and may be paid by UBS AM (US) for providing sub-transfer agency and other services. Financial Intermediaries may be paid a sub-transfer agency or related fee out of Fund assets similar to which that the Fund otherwise would have paid the Fund's transfer agent. In addition, the Financial Intermediary, for the services provided, may charge a higher fee than would be represented by the sub-transfer agency or related fee. To the extent sub-transfer agency or related fees do not meet the charge, the underwriter or an affiliate will pay the difference out of its own resources. Such payments are often referred to as "revenue sharing." Such expenses, to the extent they are Fund expenses, are included in the annual operating expenses set forth in the Fund's prospectus.

You should ask your Financial Intermediary about any payment it receives from the underwriter and any services provided.

Transfer agency services

Independent registered public accounting firm

Ernst & Young LLP, 5 Times Square, New York, New York 10036, is the independent registered public accounting firm of the Trust.

Legal counsel

Stradley Ronon Stevens & Young, LLP, Philadelphia, Pennsylvania, is legal counsel to the Trust and the Independent Trustees.

Personal trading policies

A copy of the Code of Ethics has been filed with and is available through the SEC.

Proxy voting policies

The Board believes that the voting of proxies on securities held by the Fund is an important element of the overall investment process. As such, the Board has delegated the responsibility to vote such proxies to UBS AM (Americas). Following is a summary of UBS AM (Americas)'s proxy voting policy.

Portfolio holdings disclosure policies and procedures

Introduction. UBS AM (Americas) and the Board have adopted portfolio holdings disclosure policies and procedures to govern the disclosure of the portfolio holdings of the Fund (the "Disclosure Policy"). The Trust's policy with respect to the release of portfolio holdings information is to only release such information consistent with applicable legal requirements and the fiduciary duties owed to shareholders. Subject to the limited exceptions described below, the Fund's portfolio holdings will not be made available to anyone outside of UBS AM (Americas) unless and until the information has been made available to all shareholders or the general public in a manner consistent with the spirit and terms of the Disclosure Policy. A description of the type and frequency of portfolio holdings that are disclosed to the public is contained in the Fund's Prospectus, as it may be updated from time to time.

The Disclosure Policy requires that the UBS AM (Americas) Legal and Compliance Departments address any material conflicts of interest regarding a disclosure of portfolio holdings and determine whether a disclosure of the Fund's portfolio holdings is for a legitimate business purpose and in the best interest of the Fund's shareholders prior to the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust or an attorney in the UBS AM (Americas) Legal and Compliance Departments authorizing the disclosure of portfolio holdings. The UBS AM (Americas) Legal and Compliance Departments will periodically review how the Fund's portfolio holdings are being disclosed to and used by, if at all, shareholders, service providers, UBS AM (Americas) affiliates, fiduciaries and broker-dealers, to ensure that such disclosure and use is for legitimate Fund business reasons and consistent with the best interests of the Fund's shareholders.

Disclosure of complete portfolio holdings to service providers subject to confidentiality and trading restrictions. UBS AM (Americas), for legitimate fund business purposes, may disclose the Fund's complete portfolio holdings if it deems such disclosure necessary and appropriate to rating and ranking organizations, financial printers, proxy voting service providers, pricing information vendors, derivatives collateral managers, third-parties that deliver analytical, statistical or consulting services, custodians or a redeeming party's custodian or transfer agent, as necessary in connection with redemptions in-kind, and other third parties that provide services (collectively, "Service Providers") to UBS AM (Americas) and/or the Fund.

Disclosure of complete portfolio holdings to a Service Provider is conditioned on the Service Provider being subject to a written duty of confidentiality, including a duty not to trade on the basis of any material non-public information, pursuant to the terms of the service agreement between the Service Provider and the Trust or UBS AM (Americas), or the terms of a separate confidentiality agreement. The frequency with which complete portfolio holdings may be disclosed to a Service Provider, and the length of lag, if any, between the date of information and the date on which the information is disclosed to the Service Provider, is to be determined based on the facts and circumstances, including, without limitation, the nature of the portfolio holdings information to be disclosed, the risk of harm to the Fund's shareholders, and the legitimate fund business purposes served by such disclosure. Disclosure of Fund complete portfolio holdings to a Service Provider must be authorized in writing by the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust or by an attorney in the UBS AM (Americas) Legal and Compliance Departments.

Disclosure of complete portfolio holdings to UBS Asset Management affiliates and certain fiduciaries subject to confidentiality and trading restrictions. The Fund's complete portfolio holdings may be disclosed between and among the following persons (collectively, "Affiliates and Fiduciaries") subject to authorization by the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust, or an attorney in the UBS AM (Americas) Legal and Compliance Departments, for legitimate fund business purposes within the scope of their official duties and responsibilities, and subject to such Affiliate/Fiduciary's continuing duty of confidentiality and duty not to trade on the basis of any material, non-public information, as such duties are imposed under the Trust's and/or UBS AM (Americas)'s Code of Ethics, the Fund's policies and procedures regarding the prevention of the misuse of inside information, by agreement or under applicable laws, rules and regulations: (i) persons who are subject to UBS AM (Americas)'s Codes of Ethics or the policies and procedures regarding the prevention of the misuse of inside information; (ii) an investment advisor, distributor, administrator, sub-administrator, transfer agent, custodian or securities lending agent to the Fund; (iii) an accounting firm, an auditing firm or outside legal counsel retained by UBS AM (Americas) or the Fund; (iv) an investment advisor to whom complete portfolio holdings are disclosed for due diligence purposes when the advisor is in merger or acquisition talks with the Fund's current advisor; and (v) a newly hired investment advisor or sub-advisor to whom complete portfolio holdings are disclosed prior to the time it commences its duties.

portfolio holdings information to be disclosed, and the risk of harm to the Fund and its shareholders, and the legitimate fund business purposes served by such disclosure.

• The Fund uses a limited number of financial printers to print and file their annual and semiannual shareholder reports and other regulatory materials. There is at least a three week lag between the date of the portfolio holdings information and the date on which the information is disclosed to the printer.

• The rating agencies of Morningstar and Lipper and the financial news and data companies, Bloomberg L.P. and FactSet Research Systems Inc., receive portfolio holdings information on a quarterly basis so that the Fund may be included in each company's industry reports and other materials. There is a 60-day lag between the date of the portfolio holdings information and the date on which the information is disclosed to these companies.

Disclosure of complete portfolio holdings to certain shareholders subject to confidentiality and trading restrictions. UBS AM (Americas) may make available the Fund's complete non-public portfolio holdings, as of the most recent month-end, no sooner than 8 business days after the month-end for the purpose of assisting a shareholder to comply with the shareholder's legal or other regulatory obligations. UBS AM (Americas) may release the non-public portfolio holdings to a shareholder of the Fund if: (i) the shareholder requests the non-public portfolio holdings for the purpose of assisting the shareholder in complying with the shareholder's legal or other regulatory obligations; (ii) the disclosure of the non-public portfolio holdings is consistent with the Fund's legitimate business purpose; and (iii) the shareholder (and, if applicable, the shareholder's service provider) executes a written confidentiality agreement whereby the shareholder (and, if applicable, the shareholder's service provider) agrees not to disclose the non-public portfolio holdings information to third parties and not to purchase or sell any portfolio securities listed in the non-public portfolio holdings in reliance on the non-public portfolio holdings information.

Disclosure to a shareholder of the Fund of the non-public portfolio holdings information must be authorized in writing by the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Fund or by an attorney in the UBS AM (Americas) Legal and Compliance Departments.

As of the date of this SAI, the Trust, on behalf of the Fund, had no arrangements with shareholders to provide portfolio holdings in advance of their release to the general public to assist shareholders in complying with the shareholders' legal or regulatory obligations.

Disclosure of portfolio holdings to broker-dealers in the normal course of managing Fund assets. An investment advisor, administrator or custodian for the Fund may, for legitimate fund business purposes within the scope of their official duties and responsibilities, disclose portfolio holdings (whether partial portfolio holdings or complete portfolio holdings) and other investment positions comprising the Fund to one or more broker-dealers during the course of, or in connection with, normal day-to-day securities and derivatives transactions with or through such broker-dealers subject to the broker-dealer's legal obligation not to use or disclose material non-public information concerning the Fund's portfolio holdings, other investment positions, securities transactions or derivatives transactions without the consent of the Trust or the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust or an attorney in the UBS AM (Americas) Legal and Compliance Departments. The Trust has not given its consent to any such use or disclosure and no person including the Treasurer, Assistant Treasurer, Secretary or Assistant Secretary of the Trust or an attorney in the UBS AM (Americas) Legal and Compliance Departments is authorized to give such consent except as approved by the Board. In the event consent is given to disclose portfolio holdings to a broker-dealer, the frequency with which the portfolio holdings may be disclosed to a broker-dealer, and the length of the lag, if any, between the date of the information and the date on which the information is disclosed to the broker-dealer, is to be determined based on the facts and circumstances, including, without limitation, the nature of the portfolio holdings information to be disclosed, and the risk of harm to the Fund and its shareholders, and the legitimate fund business purposes served by such disclosure.

Disclosure of non-material information. Policies and procedures regarding disclosure of non-material information permit the officers of the Trust, UBS Asset Management Funds portfolio managers and senior officers of UBS AM (Americas) Product Control and Investment Support, UBS AM (Americas) Legal and Compliance Departments, and anyone employed by or associated with UBS AM (Americas) who has been authorized by the UBS AM (Americas) Legal Department (collectively, "Approved Representatives") to disclose any views, opinions, judgments, advice or commentary, or any analytical, statistical, performance or other information, in connection with or relating to the Fund or its portfolio holdings and/or other investment positions (collectively, commentary and analysis) or any changes in the portfolio holdings of the Fund that occurred after the most recent calendar-quarter end (recent portfolio changes) to any person if such information does not constitute material non-public information.

An Approved Representative must make a good faith determination whether the information constitutes material non-public information, which involves an assessment of the particular facts and circumstances. UBS AM (Americas) believes that in most cases recent portfolio changes that involve a few or even several securities in a diversified portfolio or commentary and analysis would be immaterial and would not convey any advantage to a recipient in making an investment decision concerning the Fund. Nonexclusive examples of commentary and analysis include: (i) the allocation of the Fund's portfolio holdings and other investment positions among various asset classes, sectors, industries and countries; (ii) the characteristics of the stock and bond components of the Fund's portfolio holdings and other investment positions; (iii) the attribution of Fund returns by asset class, sector, industry and country; and (iv) the volatility characteristics of the Fund. An Approved Representative may in his or her sole discretion determine whether to deny any request for information made by any person, and may do so for any reason or no reason.

Disclosure of portfolio holdings as required by applicable law. Fund portfolio holdings and other investment positions comprising the Fund may be disclosed to any person as required by applicable laws, rules and regulations. Examples of such required disclosure include, but are not limited to, disclosure of Fund portfolio holdings: (i) in a filing or submission with the SEC or another regulatory body; (ii) in connection with seeking recovery on defaulted bonds in a federal bankruptcy case; (iii) in connection with a lawsuit; or (iv) as required by court order, subpoena or similar process (e.g., arbitration proceedings).

Prohibitions on disclosure of portfolio holdings. No person is authorized to disclose Fund portfolio holdings or other investment positions (whether online at www.ubs.com, in writing, by fax, by e-mail, orally or by other means) except in accordance with the Disclosure Policy. In addition, no person is authorized to make disclosure pursuant to the Disclosure Policy if such disclosure would be unlawful under the antifraud provisions of the federal securities laws (as defined in Rule 38a-1 under the Act). Furthermore, UBS AM (Americas), in its sole discretion, may determine not to disclose portfolio holdings or other investment positions comprising the Fund to any person who might otherwise be eligible to receive such information under the Disclosure Policy, or may determine to make such disclosures publicly as described above.

Prohibitions on receipt of compensation or other consideration. Neither UBS AM (Americas), the Fund nor any other person may pay or receive any compensation or other consideration of any type for the purpose of obtaining disclosure of Fund portfolio holdings or other investment positions. "Consideration" includes any agreement to maintain assets in the Fund or in other investment companies or accounts managed by the investment advisor or by any affiliated person of the investment advisor.

Bank line of credit

The Fund participates with other funds managed by UBS AM in a $125 million committed credit facility (the "Credit Facility") with State Street, to be utilized for temporary financing until the settlement of sales or purchases of portfolio securities, the repurchase or redemption of shares at the request of shareholders and other temporary or emergency purposes. Under the Credit Facility arrangement, the Fund has agreed to pay commitment fees on the average daily balance of the Credit Facility not utilized. Under the Credit Facility arrangement, commitment fees are allocated amongst the participating funds as follows: 50% of the allocation is based on the relative asset size of the funds and the other 50% of the allocation is based on utilization. During the fiscal period ended June 30, 2018, the Fund was not operational and did not utilize the Credit Facility.

Portfolio transactions and brokerage commissions

The Advisor is responsible for decisions to buy and sell securities for the Fund and for the placement of the Fund's portfolio business and the negotiation of commissions, if any, paid on such transactions. Fixed income securities in which the Fund invests are traded in the OTC market. These securities are generally traded on a net basis with dealers acting as principal for their own accounts without a stated commission, although the bid/ask spread quoted on securities includes an implicit profit to the dealers. In OTC transactions, orders are placed directly with a principal market-maker unless a better price and execution can be obtained by using a broker. Brokerage commissions are paid on transactions in listed securities, futures contracts and options. The Advisor is responsible for effecting portfolio transactions and will do so in a manner deemed fair and reasonable to the Fund. Under its advisory agreement with the Fund, the Advisor is authorized to utilize the trading desk of its foreign affiliates to execute foreign securities transactions, but monitors the selection by such affiliates of brokers and dealers used to execute transactions for the Fund.

The primary consideration in all portfolio transactions will be prompt execution of orders in an efficient manner at the most favorable price. However, subject to policies established by the Board of the Trust, the Fund may pay a broker-dealer a commission for effecting a portfolio transaction for the Fund in excess of the amount of commission another broker-dealer would have charged if the Advisor determines in good faith that the commission paid was reasonable in relation to the brokerage or research services provided by such broker-dealer, viewed in terms of that particular transaction or such firm's overall responsibilities with respect to the clients, including the Fund, as to which the Advisor exercises investment discretion. In selecting and monitoring broker-dealers and negotiating commissions, the Advisor considers the firm's reliability, the quality of its execution services on a continuing basis and its financial condition. When more than one firm is believed to meet these criteria, preference may be given to brokers

who provide research or statistical material or other services to the Fund or to the Advisor. Such services include advice, both directly and in writing, as to the value of the securities; the advisability of investing in, purchasing or selling securities; and the availability of securities, or purchasers or sellers of securities, as well as analyses and reports concerning issues, industries, securities, economic factors and trends, portfolio strategy and the performance of accounts. This allows the Advisor to supplement its own investment research activities and obtain the views and information of others prior to making investment decisions. The Advisor is of the opinion that, because this material must be analyzed and reviewed by its staff, the receipt and use of such material does not tend to reduce expenses but may benefit the Fund by supplementing the Advisor's research.

The Advisor effects portfolio transactions for other investment companies and advisory accounts. Research services furnished by dealers through whom the Fund effects its securities transactions may be used by the Advisor, or its affiliated investment advisors, in servicing all of their accounts; not all such services may be used in connection with the Fund. In the opinion of the Advisor, it is not possible to measure separately the benefits from research services to each of the accounts (including the Fund). The Advisor will attempt to equitably allocate portfolio transactions between the Fund and others whenever concurrent decisions are made to purchase or sell securities by the Fund and another account. In making such allocations between the Fund and others, the main factors to be considered are the respective investment objectives, the relative size of portfolio holdings of the same or comparable securities, the availability of cash for investment, the size of investment commitments generally held and the opinions of the persons responsible for recommending investments to the Fund and the others. In some cases, this procedure could have an adverse effect on the Fund. In the opinion of the Advisor, however, the results of such procedures will, on the whole, be in the best interest of each of the clients.

When buying or selling securities, the Fund may pay commissions to brokers who are affiliated with the Advisor or the Fund. The Fund may purchase securities in certain underwritten offerings for which an affiliate of the Fund or the Advisor may act as an underwriter. The Fund may effect futures transactions through, and pay commissions to, FCMs who are affiliated with the Advisor or the Fund in accordance with procedures adopted by the Board.

Portfolio turnover

The Fund is free to dispose of its portfolio securities at any time, subject to complying with the Code and the Act, when changes in circumstances or conditions make such a move desirable in light of the Fund's investment objective. The Fund will not attempt to achieve or be limited to a predetermined rate of portfolio turnover, such a turnover always being incidental to transactions undertaken with a view to achieving the Fund's investment objective.

The Fund does not intend to use short-term trading as a primary means of achieving its investment objectives. The rate of portfolio turnover shall be calculated by dividing (a) the lesser of purchases and sales of portfolio securities for the particular fiscal year by (b) the monthly average of the value of the portfolio securities owned by the Fund during the particular fiscal year. Such monthly average shall be calculated by totaling the values of the portfolio securities as of the beginning and end of the first month of the particular fiscal year and as of the end of each of the succeeding eleven months and dividing the sum by 13.

The portfolio turnover rate for the Fund may exceed 100%. High portfolio turnover rates (over 100%) may involve correspondingly greater brokerage commissions and other transaction costs, which will be borne directly by the Fund and ultimately by the Fund's shareholders. In addition, high portfolio turnover may result in increased short-term capital gains, which, when distributed to shareholders, are treated as ordinary income.

Shares of beneficial interest

The Fund currently offers three classes of shares: the UBS Fund—Class A (the Class A shares), UBS Fund—Class P (the Class P shares) and UBS Fund—Class P2 (the Class P2 shares). Only Class P2 shares are included in this SAI.

The Fund is authorized to issue an unlimited number of shares of beneficial interest with a $0.001 par value per share. Each share of beneficial interest represents an equal proportionate interest in the assets and liabilities of the Fund and has identical voting, dividend, redemption, liquidation and other rights and preferences as the other classes of the Fund. No class may vote on matters that affect only another class. Under Delaware law, the Trust does not normally hold annual meetings of shareholders. Shareholders' meetings may be held from time to time to consider certain matters, including changes to the Fund's fundamental investment objective and fundamental investment policies, changes to the Trust's investment advisory agreements and the election of Trustees when required by the Act. When matters are submitted to shareholders for a vote, shareholders are entitled to one vote per share with proportionate voting for fractional shares. The shares of the Fund do not have cumulative voting rights or any preemptive or conversion rights, and the Trustees have authority, from time to time, to divide or combine the shares of the Fund into a greater or lesser number of shares so affected. In the case of a liquidation of the Fund, each shareholder of the Fund will be entitled to share, based upon the shareholder's percentage share ownership, in the distribution of assets, net of liabilities, of the Fund. No shareholder is liable for further calls or assessment by the Fund.

The Trustees of the Trust do not intend to hold annual meetings of shareholders of the Fund. The SEC, however, requires the Trustees to promptly call a meeting for the purpose of voting upon the question of removal of any Trustee when requested to do so by not less than 10% of the outstanding shareholders of the Fund. In addition, subject to certain conditions, shareholders of the Fund may apply to the Fund to communicate with other shareholders to request a shareholders' meeting to vote upon the removal of a Trustee or Trustees.

Additional purchase, exchange and redemption information and other services

Class P2 shares are sold without sales charges and do not pay ongoing 12b-1 distribution or service fees. Only specific types of investors can purchase Class P2 shares.

Additional exchange and redemption information. As discussed in the Prospectus, eligible shares of the Fund may be exchanged for shares of the corresponding class of most other Family Funds.

The Fund may suspend redemption privileges or postpone the date of payment during any period (1) when the NYSE is closed or trading on the NYSE is restricted as determined by the SEC, (2) when an emergency exists, as defined by the SEC, that makes it not reasonably practicable for the Fund to dispose of securities owned by it or to determine fairly the value of its assets, or (3) as the SEC may otherwise permit. The redemption price may be more or less than the shareholder's cost, depending on the market value of the Fund's portfolio at the time.

Transfer of securities

At the discretion of the Trust, investors may be permitted to purchase Fund shares by transferring securities to the Fund that meet the Fund's investment objective and policies. Securities transferred to the Fund will be valued in accordance with the same procedures used to determine the Fund's net asset value at the time of the next determination of net asset value after such acceptance. Shares issued by the Fund in exchange for securities will be issued at net asset value per share of the Fund determined as of the same time. All dividends, interest, subscription or other rights pertaining to such securities shall become the property of the Fund and must be delivered to the Fund by the investor upon receipt from the issuer. Investors who are permitted to transfer such securities will be required to recognize a gain or loss on such transfer and pay tax thereon, if applicable, measured by the difference between the fair market value of the securities and the investors' basis therein. Securities will not be accepted in exchange for shares of the Fund unless: (1) such securities are, at the time of the exchange, eligible to be included in the Fund's portfolio and current market quotations are readily available for such securities; (2) the investor represents and warrants that all securities offered to be exchanged are not subject to any restrictions upon their sale by the Fund under the 1933 Act, or under the laws of the country in which the principal market for such securities exists, or otherwise; and (3) the value of any such security (except US government securities) being exchanged, together with other securities of the same issuer owned by the Fund, will not exceed 5% of the Fund's net assets immediately after the transaction.

Valuation of shares

The price at which you may buy, sell or exchange Fund shares is based on net asset value per share. The Fund generally calculates its net asset value on days that the NYSE is open. The Fund calculates net asset value separately for each class as of the close of regular trading on the NYSE (generally, 4:00 p.m., Eastern time). The NYSE normally is

not open, and the Fund does not price its shares, on most national holidays and on Good Friday. To the extent that the Fund's assets are traded in other markets on days when the NYSE is not open, the value of the Fund's assets may be affected on those days. If trading on the NYSE is halted for the day before 4:00 p.m., Eastern time, the Fund's net asset value per share generally will still be calculated as of the close of regular trading on the NYSE. The time at which the Fund calculates its net asset value and until which purchase, sale or exchange orders are accepted may be changed as permitted by the SEC.

The Fund calculates its net asset value based on the current market value, when available, for its portfolio securities. The Fund normally obtains market values for its investments from independent pricing sources and broker-dealers. Independent pricing sources may use reported last sale prices, official market closing prices, current market quotations or valuations from computerized "matrix" systems that derive values based on comparable investments. A matrix system incorporates parameters such as security quality, maturity and coupon, and/or research and evaluations by its staff, including review of broker-dealer market price quotations, if available, in determining the valuation of the portfolio investments. Investments also may be valued based on appraisals derived from information concerning the investment or similar investments received from recognized dealers in those holdings. Investments traded in the OTC market and listed on The NASDAQ Stock Market, Inc. ("NASDAQ") normally are valued at the NASDAQ Official Closing Price. Other OTC securities are valued at the last bid price on the valuation date available prior to valuation. Investments that are listed on US and foreign stock exchanges normally are valued at the market closing price, the last sale price on the day the investments are valued or, lacking any sales on such day, at the last available bid price. In cases where investments are traded on more than one exchange, the investments are valued on the exchange designated as the primary market by the Advisor. If a market value is not readily available from an independent pricing source for a particular investment, that security or instrument is valued at fair value as determined in good faith by or under the direction of the Board. Various factors may be reviewed in order to make a good faith determination of an investment's fair value. These factors include, but are not limited to, fundamental analytical data relating to the investment; the nature and duration of restrictions on disposition of the investments; and the evaluation of forces which influence the market in which the investments are purchased and sold. Foreign currency exchange rates are generally determined as of the close of the NYSE.

Certain investments in which the Fund invests are traded in markets that close before 4:00 p.m., Eastern time. Normally, developments that occur between the close of the foreign markets and 4:00 p.m., Eastern time, will not be reflected in the Fund's net asset value. However, if the Fund determines that such developments are so significant that they will materially affect the value of the Fund's investments, the Fund may adjust the previous closing prices to reflect what the Board believes to be the fair value of these investments as of 4:00 p.m., Eastern time.

The Fund may use a systematic fair valuation model provided by an independent third party to value investments principally traded in foreign markets in order to adjust for possible stale pricing that may occur between the close of the foreign exchanges and the time for valuation. The systematic fair valuation model may use calculations based on indices of domestic securities and other appropriate indicators, such as prices of relevant American Depositary Receipts and futures contracts. If an investment is valued at a "fair value," that value is likely to be different from the last quoted market price for the investment.

The amortized cost method of valuation, which approximates market value, generally is used to value short-term debt instruments with 60 days or less remaining to maturity, unless the Board determines that this does not represent fair value. Investments in open-end investment companies are valued at the daily closing net asset value of the respective investment company. Pursuant to the Fund's use of the practical expedient within ASC Topic 820, investments in non-registered investment companies are also valued at the daily net asset value. All investments quoted in foreign currencies will be valued daily in US dollars on the basis of the foreign currency exchange rates prevailing at the time such valuation is determined by the Fund's custodian.

Taxes

The following is a summary of certain additional tax considerations generally affecting the Fund and its shareholders that are not described in the Prospectus. No attempt is made to present a detailed explanation of the tax treatment of the Fund or its shareholders, and the discussion here and in the Prospectus is not intended as a substitute for careful tax planning.

This "Taxes" section is based on the Code and applicable regulations in effect on the date of this SAI. Future legislative, regulatory or administrative changes, or court decisions may significantly change the tax rules applicable to the Fund and its shareholders. Any of these changes or court decisions may have a retroactive effect.

This is for general information only and not tax advice. All investors should consult their own tax advisors as to the federal, state, local and foreign tax provisions applicable to them.

Taxation of the Fund

The Fund intends to elect and qualify each year as a regulated investment company (sometimes referred to as a "regulated investment company," "RIC" or "fund") under Subchapter M of the Code. If the Fund so qualifies, the Fund will not be subject to federal income tax on the portion of its investment company taxable income (that is, generally, taxable interest, dividends, net short-term capital gains, and other taxable ordinary income, net of expenses, without regard to the deduction for dividends paid) and net capital gain (that is, the excess of net long-term capital gains over net short-term capital losses) that it distributes to shareholders.

Qualification as a regulated investment company—In order to qualify for treatment as a regulated investment company, the Fund must satisfy the following requirements:

• Distribution Requirement—The Fund must distribute an amount equal to the sum of at least 90% of its investment company taxable income and 90% of its net tax-exempt income, if any, for the tax year (including, for purposes of satisfying this distribution requirement, certain distributions made by the Fund after the close of its taxable year that are treated as made during such taxable year).

• Income Requirement—The Fund must derive at least 90% of its gross income from dividends, interest, certain payments with respect to securities loans, and gains from the sale or other disposition of stock, securities or foreign currencies, or other income (including, but not limited to, gains from options, futures or forward contracts) derived from its business of investing in such stock, securities or currencies and net income derived from qualified publicly traded partnerships ("QPTPs").

• Asset Diversification Test—The Fund must satisfy the following Asset Diversification Test at the close of each quarter of the Fund's tax year: (1) at least 50% of the value of the Fund's assets must consist of cash and cash items, US government securities, securities of other regulated investment companies, and securities of other issuers (as

to which the Fund has not invested more than 5% of the value of the Fund's total assets in securities of an issuer and as to which the Fund does not hold more than 10% of the outstanding voting securities of the issuer); and (2) no more than 25% of the value of the Fund's total assets may be invested in the securities of any one issuer (other than US government securities or securities of other regulated investment companies) or of two or more issuers which the Fund controls and which are engaged in the same or similar trades or businesses, or, in the securities of one or more QPTPs.

In some circumstances, the character and timing of income realized by the Fund for purposes of the Income Requirement or the identification of the issuer for purposes of the Asset Diversification Test is uncertain under current law with respect to a particular investment, and an adverse determination or future guidance by the Internal Revenue Service ("IRS") with respect to such type of investment may adversely affect the Fund's ability to satisfy these requirements. See, "Tax Treatment of Portfolio Transactions" below with respect to the application of these requirements to certain types of investments. In other circumstances, the Fund may be required to sell portfolio holdings in order to meet the Income Requirement, Distribution Requirement, or Asset Diversification Test, which may have a negative impact on the Fund's income and performance.

The Fund may use "equalization accounting" (in lieu of making some cash distributions) in determining the portion of its income and gains that has been distributed. If the Fund uses equalization accounting, it will allocate a portion of its undistributed investment company taxable income and net capital gain to redemptions of Fund shares and will correspondingly reduce the amount of such income and gains that it distributes in cash. If the IRS determines that the Fund's allocation is improper and that the Fund has under-distributed its income and gain for any taxable year, the Fund may be liable for federal income and/or excise tax. If, as a result of such adjustment, the Fund fails to satisfy the Distribution Requirement, the Fund will not qualify that year as a regulated investment company the effect of which is described in the following paragraph.

If for any taxable year the Fund does not qualify as a regulated investment company, all of its taxable income (including its net capital gain) would be subject to tax at the applicable corporate income tax rate without any deduction for dividends paid to shareholders, and the dividends would be taxable to the shareholders as ordinary income (or possibly as qualified dividend income) to the extent of the Fund's current and accumulated earnings and profits. Failure to qualify as a regulated investment company would thus have a negative impact on the Fund's income and performance. Subject to savings provisions for certain failures to satisfy the Income Requirement or Asset Diversification Test, which, in general, are limited to those due to reasonable cause and not willful neglect, it is possible that the Fund will not qualify as a regulated investment company in any given tax year. Even if such savings provisions apply, the Fund may be subject to a monetary sanction of $50,000 or more. Moreover, the Board reserves the right not to maintain the qualification of the Fund as a regulated investment company if it determines such a course of action to be beneficial to shareholders.

Capital loss carryovers—The capital losses of the Fund, if any, do not flow through to shareholders. Rather, the Fund may use its capital losses, subject to applicable limitations, to offset its capital gains without being required to pay taxes on or distribute to shareholders such gains that are offset by the losses. If the Fund has a "net capital loss"

(that is, capital losses in excess of capital gains), the excess (if any) of the Fund's net short-term capital losses over its net long-term capital gains is treated as a short-term capital loss arising on the first day of the Fund's next taxable year, and the excess (if any) of the Fund's net long-term capital losses over its net short-term capital gains is treated as a long-term capital loss arising on the first day of the Fund's next taxable year. Any such net capital losses of the Fund that are not used to offset capital gains may be carried forward indefinitely to reduce any future capital gains realized by the Fund in succeeding taxable years. The amount of capital losses that can be carried forward and used in any single year is subject to an annual limitation if there is a more than 50% "change in ownership" of the Fund. An ownership change generally results when shareholders owning 5% or more of the Fund increase their aggregate holdings by more than 50% over a three-year look-back period. An ownership change could result in capital loss carryovers being used at a slower rate thereby reducing the Fund's ability to offset capital gains with those losses. An increase in the amount of taxable gains distributed to the Fund's shareholders could result from an ownership change. The Fund undertakes no obligation to avoid or prevent an ownership change, which can occur in the normal course of shareholder purchases and redemptions or as a result of engaging in a tax-free reorganization with another fund. Moreover, because of circumstances beyond the Fund's control, there can be no assurance that the Fund will not experience, or has not already experienced, an ownership change. Additionally, if the Fund engages in a tax-free reorganization with another fund, the effect of these and other rules not discussed herein may be to disallow or postpone the use by the Fund of its capital loss carryovers (including any current year losses and built-in losses when realized) to offset its own gains or those of the other fund, or vice versa, thereby reducing the tax benefits Fund shareholders would otherwise have enjoyed from use of such capital loss carryovers.

Undistributed capital gains—The Fund may retain or distribute to shareholders its net capital gain for each taxable year. The Fund currently intends to distribute net capital gains. If the Fund elects to retain its net capital gain, the Fund will be taxed thereon (except to the extent of any available capital loss carryovers) at the applicable corporate income tax rate. If the Fund elects to retain its net capital gain, it is expected that the Fund also will elect to have shareholders treated as if each received a distribution of its pro rata share of such gain, with the result that each shareholder will be required to report its pro rata share of such gain on its tax return as long-term capital gain, will receive a refundable tax credit for its pro rata share of tax paid by the Fund on the gain, and will increase the tax basis for its shares by an amount equal to the deemed distribution less the tax credit.

Federal excise tax—To avoid a 4% non-deductible excise tax, the Fund must distribute by December 31 of each year an amount equal to at least: (1) 98% of its ordinary income for the calendar year, (2) 98.2% of capital gain net income (that is, the excess of the gains from sales or exchanges of capital assets over the losses from such sales or exchanges) for the one-year period ended on October 31 of such calendar year, and (3) any prior year undistributed ordinary income and capital gain net income. The Fund may elect to defer to the following year any net ordinary loss incurred for the portion of the calendar year which is after the beginning of the Fund's taxable year. Also, the Fund will defer any "specified gain" or "specified loss" which would be properly taken into account for the portion of the calendar year after October 31. Any net ordinary loss, specified gain, or specified loss deferred shall be treated as arising on January 1 of the following calendar year. Generally, the Fund intends to make sufficient distributions prior to the end of each calendar year to avoid any material liability for federal income and excise tax, but can give no assurances that all or a portion of such liability will be avoided. In addition, under certain circumstances, temporary timing or permanent differences in the realization of income and expense for book and tax purposes can result in the Fund having to pay an excise tax.

Foreign income tax—Investment income received by the Fund from sources within foreign countries may be subject to foreign income tax withheld at the source and the amount of tax withheld generally will be treated as an expense of the Fund. The United States has entered into tax treaties with many foreign countries which entitle the Fund to a reduced rate of, or exemption from, tax on such income. Some countries require the filing of a tax reclaim or other forms to receive the benefit of the reduced tax rate; whether or when the Fund will receive the tax reclaim is within the control of the individual country. Information required on these forms may not be available such as shareholder information; therefore, the Fund may not receive the reduced treaty rates or potential reclaims. Other countries have conflicting and changing instructions and restrictive timing requirements which may cause the Fund not to receive the reduced treaty rates or potential reclaims. Other countries may subject capital gains realized by the Fund on sale or disposition of securities of that country to taxation. It is impossible to determine the effective rate of foreign tax in advance since the amount of the Fund's assets to be invested in various countries is not known. Under certain circumstances, the Fund may elect to pass-through foreign taxes paid by the Fund to shareholders, although it reserves the right not to do so. If the Fund makes such an election and obtains a refund of foreign taxes paid by the Fund in a prior year, the Fund may be eligible to reduce the amount of foreign taxes reported by the Fund to its shareholders, generally by the amount of the foreign taxes refunded, for the year in which the refund is received. See, "Taxation of Fund Distributions-Pass-through of foreign tax credits."

Taxation of Fund distributions

The Fund anticipates distributing substantially all of its investment company taxable income and net capital gain for each taxable year. Distributions by the Fund will be treated in the manner described below regardless of whether such distributions are paid in cash or reinvested in additional shares of the Fund (or of another fund). The Fund will send you information annually as to the federal income tax consequences of distributions made (or deemed made) during the year.

Distributions of net investment income—The Fund receives ordinary income generally in the form of dividends and/or interest on its investments in portfolio securities. The Fund may also recognize ordinary income from other sources, including, but not limited to, certain gains on foreign currency-related transactions. This income, less expenses incurred in the operation of the Fund, constitutes the Fund's net investment income from which dividends may be paid to you. The Fund calculates income dividends and capital gains distributions the same way for each class. The amount of any income dividends per share will differ, however, generally due to any differences in the service (Rule 12b-1) fees applicable to the classes. If you are a taxable investor, distributions of net investment income generally are taxable as ordinary income to the extent of the Fund's earnings and profits. A portion of the income dividends paid to you may be qualified dividends eligible to be taxed at reduced rates. See the discussion below under the headings, "—Qualified dividend income for individuals" and "—Dividends-received deduction for corporations."

Distributions of capital gains—The Fund may derive capital gain and loss in connection with sales or other dispositions of its portfolio securities. Distributions derived from the excess of net short-term capital gain over net long-term capital loss will be taxable to you as ordinary income. Distributions paid from the excess of net long-term capital gain over net short-term capital loss will be taxable to you as long-term capital gain, regardless of how long you have held your shares in the Fund. Any net short-term or long-term capital gain realized by the Fund (net of any capital loss carryovers) generally will be distributed once each year and may be distributed more frequently, if necessary, in order to reduce or eliminate federal excise or income taxes on the Fund.

Returns of capital—Distributions by the Fund that are not paid from earnings and profits will be treated as a return of capital to the extent of (and in reduction of) the shareholder's tax basis in his shares; any excess will be treated as gain from the sale of his shares. Thus, the portion of a distribution that constitutes a return of capital will decrease the shareholder's tax basis in his Fund shares (but not below zero), and will result in an increase in the amount of gain (or decrease in the amount of loss) that will be recognized by the shareholder for tax purposes on the later sale of such Fund shares. Return of capital distributions can occur for a number of reasons including, among others, the Fund over-estimates the income to be received from certain investments such as those classified as partnerships or equity REITs (see, "Tax treatment of portfolio transactions—Investments in US REITs" below).

Qualified dividend income for individuals—Ordinary income dividends reported by the Fund to shareholders as derived from qualified dividend income will be taxed in the hands of individuals and other noncorporate shareholders (i.e., certain trusts and estates) at the rates applicable to long-term capital gain. "Qualified dividend income" means dividends paid to the Fund (a) by domestic corporations, (b) by foreign corporations that are either (i) incorporated in a possession of the United States, or (ii) are eligible for benefits under certain income tax treaties with the United States that include an exchange of information program, or (c) with respect to stock of a foreign corporation that is readily tradable on an established securities market in the United States. Both the Fund and the investor must meet certain holding period requirements to qualify Fund dividends for this treatment. Specifically, the Fund must hold the stock for at least 61 days during the 121-day period beginning 60 days before the stock becomes ex-dividend. Similarly, investors must hold their Fund shares for at least 61 days during the 121-day period beginning 60 days before the Fund distribution goes ex-dividend. Income derived from investments in derivatives, fixed-income securities, US REITs, PFICs, and income received "in lieu of" dividends in a securities lending transaction generally is not eligible for treatment as qualified dividend income. If the qualifying dividend income received by the Fund is equal to or greater than 95% of the Fund's gross income (exclusive of net capital gain) in any taxable year, all of the ordinary income dividends paid by the Fund will be qualifying dividend income.

Dividends-received deduction for corporations—For corporate shareholders, a portion of the dividends paid by the Fund may qualify for the 50% corporate dividends-received deduction. The portion of dividends paid by the Fund that so qualifies will be reported by the Fund to shareholders each year and cannot exceed the gross amount of dividends received by the Fund from domestic (US) corporations. The availability of the dividends-received deduction is subject to certain holding period and debt financing restrictions that apply to both the Fund and the investor. Specifically, the amount that the Fund may report as eligible for the dividends-received deduction will be reduced or eliminated if the shares on which the dividends earned by the Fund were debt-financed or held by the Fund for less than a minimum period of time, generally 46 days during a 91-day period beginning 45 days before the stock becomes ex-dividend. Similarly, if your Fund shares are debt-financed or held by you for less than a 46-day period then the dividends-received deduction for Fund dividends on your shares may also be reduced or eliminated. Even if reported as dividends eligible for the dividends-received deduction, all dividends (including any deducted portion) must be included in your alternative minimum taxable income calculation. Under 2017 legislation commonly known as the Tax Cuts and Jobs Act ("TCJA"), corporations are no longer subject to the alternative minimum tax for taxable years of the corporation beginning after December 31, 2017. Income derived by the Fund from investments in derivatives, fixed-income and foreign securities generally is not eligible for this treatment.

Pass-through of foreign tax credits—If more than 50% of the Fund's total assets at the end of a fiscal year is invested in foreign securities, the Fund may elect to pass-through to you your pro rata share of foreign taxes paid by the Fund. If this election is made, the Fund may report more taxable income to you than it actually distributes. You will then be entitled either to deduct your share of these taxes in computing your taxable income, or to claim a foreign tax credit for these taxes against your US federal income tax (subject to limitations for certain shareholders). The Fund will provide you with the information necessary to claim this deduction or credit on your personal income tax return if it makes this election. No deduction for foreign tax may be claimed by a noncorporate shareholder who does not itemize deductions or who is subject to the alternative minimum tax. Shareholders may be unable to claim a credit for the full amount of their proportionate shares of the foreign income tax paid by the Fund due to certain limitations that may apply. The Fund reserves the right not to pass-through to its shareholders the amount of foreign income taxes paid by the Fund. Additionally, any foreign tax withheld on payments made "in lieu of" dividends or interest will not qualify for the pass-through of foreign tax credits to shareholders. See, "Tax treatment of portfolio transactions—Securities lending" below.

Tax credit bonds—If a Fund holds, directly or indirectly, one or more "tax credit bonds" (including Build America Bonds, clean renewable energy bonds and qualified tax credit bonds) on one or more applicable dates during a tax-able year, the Fund may elect to permit its shareholders to claim a tax credit on their income tax returns equal to each shareholder's proportionate share of tax credits from the applicable bonds that otherwise would be allowed to the Fund. (Under the TCJA, the Build America Bonds, clean renewable energy bonds and certain other qualified bonds may no longer be issued after December 31, 2017.) In such a case, shareholders must include in gross income (as interest) their proportionate share of the income attributable to their proportionate share of those offsetting tax credits. A shareholder's ability to claim a tax credit associated with one or more tax credit bonds may be subject to certain limitations imposed by the Code. Even if a Fund is eligible to pass through tax credits to shareholders, the Fund may choose not to do so.

Dividends declared in December and paid in January—Ordinarily, shareholders are required to take distributions by the Fund into account in the year in which the distributions are made. However, dividends declared in October, November or December of any year and payable to shareholders of record on a specified date in such a month will be deemed to have been received by the shareholders (and made by the Fund) on December 31 of such calendar year if such dividends are actually paid in January of the following year. Shareholders will be advised annually as to the US federal income tax consequences of distributions made (or deemed made) during the year in accordance with the guidance that has been provided by the IRS.

Medicare tax—A 3.8% Medicare tax is imposed on net investment income earned by certain individuals, estates and trusts. "Net investment income," for these purposes, means investment income, including ordinary dividends and capital gain distributions received from the Fund and net gains from redemptions or other taxable dispositions of Fund shares, reduced by the deductions properly allocable to such income. In the case of an individual, the tax will be imposed on the lesser of (1) the shareholder's net investment income or (2) the amount by which the shareholder's modified adjusted gross income or adjusted gross income, as applicable, exceeds a certain threshold. This Medicare tax, if applicable, is reported by you on, and paid with, your federal income tax return.

Sales, exchanges and redemption of Fund shares

Sales, exchanges and redemptions (including redemptions in kind) of Fund shares are taxable transactions for federal and state income tax purposes. If you redeem your Fund shares, the IRS requires you to report any gain or loss on your redemption. If you held your shares as a capital asset, the gain or loss that you realize will be a capital gain or loss and will be long-term or short-term, generally depending on how long you have held your shares. Capital losses in any year are deductible only to the extent of capital gains plus, in the case of a noncorporate taxpayer, $3,000 of ordinary income.

Tax basis information—Unless you are investing in the Fund through a tax-advantaged retirement account, such as a 401(k) plan or an individual retirement account, or a money market account, the Fund is required to report to you and the IRS annually on Form 1099-B the cost basis of shares where the cost basis of the shares is known by the Fund (referred to as "covered shares"). Cost basis will be calculated using the Fund's default method of average cost, unless you instruct the Fund in writing to use a different calculation method. In general, average cost is the total cost basis of all your shares in an account divided by the total number of shares in the account. To determine whether short-term or long-term capital gains taxes apply, the IRS presumes you redeem your oldest shares first.

The IRS permits the use of several methods to determine the cost basis of mutual fund shares. The method used will determine which specific shares are deemed to be sold when there are multiple purchases on different dates at differing share prices, and the entire position is not sold at one time. The Fund does not recommend any particular method of determining cost basis, and the use of other methods may result in more favorable tax consequences for some shareholders. It is important that you consult with your tax advisor to determine which method is best for you and then notify the Fund in writing if you intend to utilize a method other than average cost for covered shares.

In addition to the Fund's default method of average cost, other cost basis methods offered by the Trust, which you may elect to apply to covered shares, include: