Form N-CSRS Guggenheim Taxable Munic

Investors should be aware that in light of the current uncertainty, volatility and state of economies, financial markets, geopolitical tensions, and labor and public health conditions around the world, the risks below are heightened significantly compared to normal conditions and therefore subject the Trust’s investments and a shareholder’s investment in the Trust to reduced yield and/or income and sudden and substantial losses.

The views expressed in this report reflect those of the portfolio managers only through the report period as stated on the cover. These views are subject to change at any time, based on market and other conditions and should not be construed as a recommendation of any kind. The material may also include forward looking statements that involve risk and uncertainty, and there is no guarantee that any predictions will come to pass.

There can be no assurance that the Trust will achieve its investment objectives. The value of the Trust will fluctuate with the value of the underlying securities. Risk is inherent in all investing, including the loss of your entire principal. Therefore, before investing you should consider the risks carefully. The Trust is subject to various risk factors, including investment risk, which could result in the loss of the entire principal amount that you invest. Certain of these risk factors are described below. Please see the Trust’s Prospectus, Statement of Additional Information (SAI), most recent annual report and guggenheiminvestments.com/gbab for a more detailed description of the risks of investing in the Trust. Shareholders may access the Trust’s Prospectus, SAI and most recent annual report on the EDGAR Database on the Securities and Exchange Commission’s website at www.sec.gov.

The fact that a particular risk below is not specifically identified as being heightened under current conditions does not mean that the risk is not greater than under normal conditions.

Below Investment Grade Securities Risk. High yield, below investment grade and unrated high risk debt securities (which also may be known as “junk bonds”) may present additional risks because these securities may be less liquid, and therefore more difficult to value accurately and sell at an advantageous price or time, and present more credit risk than investment grade bonds. The price of high yield securities tends to be subject to greater volatility due to issuer-specific operating results and outlook and to real or perceived adverse economic and competitive industry conditions. This exposure may be obtained through investments in other investment companies. Generally, the risks associated with high yield securities are heightened during times of weakening economic conditions or rising interest rates.

Corporate Bond Risk. Corporate bonds are debt obligations issued by corporations and other business entities. Corporate bonds may be either secured or unsecured. Collateral used for secured debt includes real property, machinery, equipment, accounts receivable, stocks, bonds or notes. If a bond is unsecured, it is known as a debenture. Bondholders, as creditors, have a prior legal claim over common and preferred stockholders as to both income and assets of the corporation for the principal

and interest due them and may have a prior claim over other creditors if liens or mortgages are involved. Interest on corporate bonds may be fixed or floating, or the bonds may be zero coupons. Interest on corporate bonds is typically paid semi-annually and is fully taxable to the bondholder. Corporate bonds contain elements of both interest-rate risk and credit risk. The market value of a corporate bond generally may be expected to rise and fall inversely with interest rates and may also be affected by the credit rating of the corporation, the corporation’s performance and perceptions of the corporation in the marketplace. Corporate bonds usually yield more than government or agency bonds due to the presence of credit risk. Depending on the nature of the seniority provisions, a senior corporate bond may be junior to other credit securities of the issuer. The market value of a corporate bond may be affected by factors directly related to the issuer, such as investors’ perceptions of the creditworthiness of the issuer, the issuer’s financial performance, perceptions of the issuer in the marketplace, performance of management of the issuer, the issuer’s capital structure and use of financial leverage and demand for the issuer’s goods and services. There is a risk that the issuers of corporate bonds may not be able to meet their obligations on interest or principal payments at the time called for by an instrument. Corporate bonds of below investment grade quality are often high risk and have speculative characteristics and may be particularly susceptible to adverse issuer-specific developments.

Short Sales Risk. The Trust may make short sales of securities. A short sale is a transaction in which the Trust sells a security it does not own. If the price of the security sold short increases between the time of the short sale and the time the Trust replaces the borrowed security, the Trust will incur a loss. Although the Trust’s gain is limited to the price at which it sold the security short, its potential loss is theoretically unlimited.

Credit Risk. The Trust could lose money if the issuer or guarantor of a debt instrument or a counterparty to a derivatives transaction or other transaction is unable or unwilling, or perceived to be unable or unwilling, to pay interest or repay principal on time or defaults. The risk that such issuer, guarantor or counterparty is less willing or able to do so is heightened in market environments where interest rates are rising. Also, the issuer, guarantor or counterparty may suffer adverse changes in its financial condition or be adversely affected by economic, political or social conditions that could lower the credit quality (or the market’s perception of the credit quality) of the issuer or instrument, leading to greater volatility in the price of the instrument and in shares of the Trust. Although credit quality may not accurately reflect the true credit risk of an instrument, a change in the credit quality rating of an instrument or an issuer can have a rapid, adverse effect on the instrument’s liquidity and make it more difficult for the Trust to sell at an advantageous price or time. The risk of the occurrence of these types of events is especially heightened in market environments where interest rates are rising.

Current Fixed-Income and Debt Market Conditions. Fixed-income and debt market conditions are highly unpredictable and some parts of the market are subject to dislocations. In response to the high inflation in recent periods, governmental authorities have implemented significant fiscal and monetary policy changes, including increasing interest rates and implementation of quantitative

tightening. These actions present heightened risks, particularly to fixed-income and debt instruments, and such risks could be even further heightened if these actions are ineffective in achieving their desired outcomes. The U.S. Federal Reserve Board (“Federal Reserve”) has signaled its intention to continue raising interest rates and maintain interest rates at increased levels until inflation decreases to the Federal Reserve’s target level. It is difficult to accurately predict the effect of these actions. Certain economic conditions and market environments will expose fixed-income and debt instruments to heightened volatility and reduced liquidity, which can impact the Trust’s investments and may negatively impact the Trust’s characteristics, which in turn would impact performance.

Interest Rate Risk. Fixed-income and other debt instruments are subject to the possibility that interest rates could change (or are expected to change). Changes in interest rates, including changes in reference rates used in fixed-income and other debt instruments (such as the London Interbank Offered Rate (“LIBOR”) or Secured Overnight Financing Rate (“SOFR”)) may adversely affect the Trust’s investments in these instruments, such as the value or liquidity of, and income generated by, the investments. In addition, changes in interest rates, including rates that fall below zero, can have unpredictable effects on markets and can adversely affect the Trust’s yield, income and performance. Generally, when interest rates increase, the values of fixed-income and other debt instruments decline, and when interest rates decrease, the values of fixed-income and other debt instruments rise. The Federal Reserve, in recent periods, has increased interest rates at significant levels and signaled an intention to continue to raise interest rates and maintain interest rates at increased levels until inflation decreases to the Federal Reserve’s target level. These actions present heightened risks to fixed-income and debt instruments, and such risks could be even further heightened if these actions are unexpectedly or suddenly reversed or are ineffective in achieving their desired outcomes. It is difficult to accurately predict how long the Federal Reserve’s current stance on interest rates will persist and the impact these actions will have on the economy and the Trust’s investments and the markets where they trade.

Leverage Risk. The Trust’s use of leverage, through borrowings or instruments such as derivatives, causes the Trust to be more volatile and riskier than if it had not been leveraged. Although the use of leverage by the Trust may create an opportunity for increased return, it also results in additional risks and can magnify the effect of any losses. The effect of leverage in a declining market is likely to cause a greater decline in the net asset value of the Trust than if the Trust were not leveraged, which may result in a greater decline in the market price of the Trust shares. There can be no assurance that a leveraging strategy will be implemented or that it will be successful during any period during which it is employed. When the cost of leverage is no longer favorable, or when the Trust is otherwise required to reduce its leverage, the Trust may not be able to maintain distributions at historical levels and common shareholders will bear any costs associated with selling portfolio securities. The Trust’s total leverage may vary significantly over time. To the extent the Trust increases its amount of leverage outstanding, it will be more exposed to these risks.

Liquidity Risk. The Trust may invest in municipal securities that are, at the time of investment, illiquid. Illiquid securities are securities that cannot be disposed of within seven days in the ordinary course of business at approximately the value that the Trust values the securities. Illiquid securities may trade at a discount from comparable, more liquid securities and may be subject to wide fluctuations in market value. The Trust may be subject to significant delays in disposing of illiquid securities. Accordingly, the Trust may be forced to sell these securities at less than fair market value or may not be able to sell them when the Adviser believes it is desirable to do so. Illiquid securities also may entail registration expenses and other transaction costs that are higher than those for liquid securities. Dislocations in certain parts of markets are resulting in reduced liquidity for certain investments. It is uncertain when financial markets will improve. Liquidity of financial markets may also be affected by government intervention, such as the legal restrictions on certain financial instruments’ resale.

Management Risk. The Trust is actively managed, which means that investment decisions are made based on investment views. There is no guarantee that the investment views will produce the desired results or expected returns, causing the Trust to fail to meet its investment objective or underperform its benchmark index or funds with similar investment objectives and strategies.

Market Risk. The value of, or income generated by, the investments held by the Trust are subject to the possibility of rapid and unpredictable fluctuation. The value of certain investments (e.g., equity securities) tends to fluctuate more dramatically over the shorter term than do the value of other asset classes. These movements may result from factors affecting individual companies, or from broader influences, including real or perceived changes in prevailing interest rates, changes in inflation or expectations about inflation, investor confidence or economic, political (including geopolitical), social or financial market conditions, tariffs and trade disruptions, recession, changes in currency rates, natural/environmental disasters, cyber attacks, terrorism, governmental or quasigovernmental actions, public health emergencies (such as the spread of infectious diseases, pandemics and epidemics), debt crises, actual or threatened war or other armed conflicts (such as the ongoing Russia-Ukraine conflict and its risk of expansion or collateral economic and other effects) or ratings downgrade, and other similar events, each of which may be temporary or last for extended periods. Many economies and markets are experiencing, and have experienced in recent periods, high inflation rates. In response to such inflation, government authorities have implemented significant fiscal and monetary policies such as increasing interest rates and quantitative tightening (reduction of money available in the market) which may adversely affect financial markets and the broader economy, as well as the Trust’s performance. Administrative changes, policy reform and/or changes in law or governmental regulations can result in expropriation or nationalization of the investments of a company in which the Trust invests.

Municipal Securities Risk. The Trust’s holdings of municipal securities could be significantly affected by events that affect the municipal bond market, which could include unfavorable legislative or political developments, adverse changes in the financial conditions of issuers of municipal securities, or other actual or perceived changes in economic, social, or public health conditions. The amount of

public information available about municipal securities is generally less than that for corporate equities or bonds. The secondary market for municipal securities also tends to be less well-developed or liquid than many other securities markets, which may adversely affect the Trust’s ability to sell such securities at prices approximating those at which the Trust may currently value them. In addition, many state and municipal governments that issue securities are under significant economic and financial stress and may not be able to satisfy their obligations. Issuers of municipal securities might seek protection under bankruptcy laws. In the event of bankruptcy of such an issuer, holders of municipal securities could experience delays in collecting principal and interest and such holders may not be able to collect all principal and interest to which they are entitled. Legislative developments may result in changes to the laws relating to municipal bankruptcies. The income, value and/or risk of municipal securities is often correlated to specific project or other revenue sources, which can be negatively affected by demographic trends, such as population shifts or changing tastes and values, or increasing vacancies or declining rents resulting from legal, cultural, technological, global or local economic developments, as well as reduced demand for properties, revenues or goods. Municipalities and municipal projects that rely directly or indirectly on federal funding mechanisms may be negatively affected by constraints of the federal government budget. Each of the foregoing may adversely affect the Trust’s investments in municipal securities.

Build America Bonds (“BABs”) Risk. BABs are a form of municipal financing. The BABs market is smaller and less diverse than the broader municipal securities market. In addition, because the relevant provisions of the American Recovery and Reinvestment Act of 2009 were not extended, bonds issued after December 31, 2010 cannot qualify as BABs. There is no indication that Congress will renew the program to permit issuance of new Build America Bonds. As a result, the number of available BABs is limited, which may negatively affect the value of BABs. In addition, there can be no assurance that BABs will continue to be actively traded. It is difficult to predict the extent to which a market for such bonds will continue, meaning that BABs may experience greater illiquidity than other municipal obligations.

Special Risks Related to Certain Municipal Securities. The Trust may invest in municipal leases and certificates of participation in such leases, which involve special risks not normally associated with general obligations or revenue bonds. Leases and installment purchase or conditional sale contracts (which normally provide for title to the leased asset to pass eventually to the governmental issuer) have evolved as a means for governmental issuers to acquire property and equipment without meeting the constitutional and statutory requirements for the issuance of debt. The debt issuance limitations are deemed to be inapplicable because of the inclusion in many leases or contracts of “non-appropriation” clauses that relieve the governmental issuer of any obligation to make future payments under the lease or contract unless money is appropriated for such purpose by the appropriate legislative body on a yearly or other periodic basis. In addition, such leases or contracts may be subject to the temporary abatement of payments in the event the governmental issuer is prevented from maintaining occupancy of the leased premises or utilizing the leased equipment.

Taxable Municipal Securities Risk. While interest earned on municipal securities is generally not subject to federal tax, any interest earned on taxable municipal securities is fully taxable at the federal level and may be subject to tax at the state level. Additionally, litigation, legislation or other political events, local business or economic conditions or the bankruptcy of the issuer could have a significant effect on the ability of an issuer of municipal securities to make payments of principal and/or interest. Political changes and uncertainties in the municipal market related to taxation, legislative changes or the rights of municipal security holders can significantly affect municipal securities. Because many securities are issued to finance similar projects, especially those relating to education, health care, transportation and utilities, conditions in those sectors can affect the overall municipal market. In addition, changes in the financial condition of an individual municipal issuer can affect the overall municipal market.

Debt Instruments Risk. The value of the Trust’s investments in debt instruments (including bonds issued by non-profit entities, municipal conduits and project finance corporations) depends on the continuing ability of the debt issuers to meet their obligations for the payment of interest and principal when due. The ability of debt issuers to make timely payments of interest and principal can be affected by a variety of developments and changes in legal, political, economic and other conditions. Investments in debt instruments present certain risks, including credit, interest rate, liquidity and prepayment risks. Issuers that rely directly or indirectly on government funding mechanisms or non-profit statutes, may be negatively affected by actions of the government, including reductions in government spending, increases in tax rates, and changes in fiscal policy. The value of a debt instrument may decline for many reasons that directly relate to the issuer, such as a change in the demand for the issuer’s goods or services, or a decline in the issuer’s performance, earnings or assets. In addition, changes in the financial condition of an individual issuer can affect the overall market for such instruments. The risk of the occurrence of these types of unfavorable events is heightened in market environments where interest rates are rising.

Municipal Conduit Bond Risk. Municipal conduit bonds, also referred to as private activity bonds or industrial revenue bonds, are bonds issued by state and local governments or other entities for the purpose of financing the projects of certain private enterprises. Unlike municipal bonds, municipal conduit bonds are not backed by the full faith, credit or general taxing power of the issuing governmental entity. Rather, issuances of municipal conduit bonds are backed solely by revenues of the private enterprise involved. Municipal conduit bonds are therefore subject to heightened credit risk, as the private enterprise involved can have a different credit profile than the issuing governmental entity. Municipal conduit bonds may be negatively impacted by conditions affecting either the general credit of the private enterprise or the project itself. Factors such as competitive pricing, construction delays, or lack of demand for the project could cause project revenues to fall short of projections, and defaults could occur. Municipal conduit bonds tend to have longer terms and thus are more susceptible to interest rate risk.

Project Finance Risk. Project finance is a type of financing commonly used for infrastructure, industry, and public service projects. In a project finance arrangement, the cash flow generated by the project is used to repay lenders while the project’s assets, rights and interest are held as secondary collateral. Investors involved in project finance face heightened technology risk, operational risk, and market risk because the cash flow generated by the project, rather than the revenues of the company behind the project, will repay investors. In addition, because of the project-specific nature of such arrangements, the Trust face the risk of loss of investment if the company behind the project determines not to complete it.

Risks of Investing in Debt Issued by Non-Profit Institutions. Investing in debt issued by non-profit institutions, including foundations, museums, cultural institutions, colleges, universities, hospitals and healthcare systems, involves different risks than investing in municipal bonds. Many non-profit entities are tax-exempt under Section 501(c)(3) of the Internal Revenue Code and risk losing their tax-exempt status if they do not comply with the requirements of that section. There is a risk that Congress or the IRS could pass new laws or regulations changing the requirements for tax-exempt status, which could result in a non-profit institution losing such status. Additionally, non-profit institutions that receive federal and state appropriations face the risk of a decrease in or loss of such appropriations. Hospitals and healthcare systems are highly regulated at the federal and state levels and face burdensome state licensing requirements. There is a risk that a state could refuse to renew a hospital’s license or that the passage of new laws or regulations, especially changes to Medicare or Medicaid reimbursement, could inhibit a hospital from growing its revenues. Hospitals and healthcare systems also face risks related to increased competition from other health care providers; increased costs of inpatient and outpatient care; and increased pressures from managed care organizations, insurers, and patients to cut the costs of medical care. There is a risk that non-profit institutions relying on philanthropy and donations to maintain their operations will receive less funding during economic downturns.

Senior Loans Risk. The Trust may invest in senior secured floating rate loans made to corporations and other non-governmental entities and issuers (“Senior Loans”). Senior Loans typically hold the most senior position in the capital structure of the issuing entity, are typically secured with specific collateral and typically have a claim on the assets and/or stock of the borrower that is senior to that held by subordinated debt holders and stockholders of the borrower. The Trust’s investments in Senior Loans are typically below investment grade and are considered speculative because of the credit risk of their issuers. The risks associated with Senior Loans of below investment grade quality are similar to the risks of other lower grade securities, although Senior Loans are typically senior in payment priority and secured on a senior priority basis in contrast to subordinated and unsecured securities. Senior Loans’ higher priority has historically resulted in generally higher recoveries in the event of a corporate reorganization. In addition, because their interest payments are adjusted for changes in short-term interest rates, investments in Senior Loans have less interest rate risk than certain other lower grade securities, which may have fixed interest rates. The Trust invests in or is exposed to loans

and other similar debt obligations that are sometimes referred to as “covenant-lite” loans or obligations, which are generally subject to more risk than investments that contain traditional financial maintenance covenants and financial reporting requirements. The terms of many loans and other instruments are tied to LIBOR, which functions as a reference rate or benchmark. It is anticipated that LIBOR will ultimately be discontinued, which may cause increased volatility and illiquidity in the markets for instruments with terms tied to LIBOR or other adverse consequences, such as decreased yields and reduction in value, for these instruments. These events may adversely affect the Trust and its investments in such instruments.

Structured Finance Investments Risk. The Trust’s structured finance investments may consist of residential mortgage-backed securities (“RMBS”) and commercial mortgage-backed securities (“CMBS”) issued by governmental entities and private issuers, asset-backed securities (“ABS”), structured notes, credit-linked notes and other types of structured finance securities. Holders of structured finance investments bear risks of the underlying investments, index or reference obligation and are subject to counterparty risk. The Trust may have the right to receive payments only from the structured product, and generally does not have direct rights against the issuer or the entity that sold the assets to be securitized. The Trust may invest in structured finance products collateralized by low grade or defaulted loans or securities. Investments in such structured finance products are subject to the risks associated with below investment grade securities. Such securities are characterized by high risk. It is likely that an economic recession could severely disrupt the market for such securities and may have an adverse impact on the value of such securities. Moreover, other types of events, domestic or international, may affect general economic conditions and financial markets, such as pandemics, armed conflicts, energy supply or price disruptions, natural disasters and man-made disasters, which may have a significant effect on the underlying assets. Structured finance securities are typically privately offered and sold, and thus are not registered under the securities laws. As a result, investments in structured finance securities may be characterized by the Trust as illiquid securities; however, an active dealer market may exist which would allow such securities to be considered liquid in some circumstances.

Asset-Backed Securities Risk. While traditional fixed-income securities typically pay a fixed rate of interest until maturity, when the entire principal amount is due, an ABS represents an interest in a pool of assets, such as automobile loans, credit card receivables, unsecured consumer loans or student loans, that has been securitized and provides for monthly payments of interest, at a fixed or floating rate, and principal from the cash flow of these assets. This pool of assets (and any related assets of the issuing entity) is the only source of payment for the ABS. The ability of an ABS issuer to make payments on the ABS, and the timing of such payments, is therefore dependent on collections on these underlying assets. The recoveries on the underlying collateral may not, in some cases, be sufficient to support payments on these securities, which may result in losses to investors in an ABS. The collateral underlying ABS may constitute assets related to a wide range of industries such as credit card and automobile receivables or other assets derived from consumer, commercial or>

corporate sectors, and these underlying assets may be secured or unsecured. ABS are particularly subject to interest rate risk and credit risk. Compared to other fixed income investments with similar maturity and credit, ABS generally increase in value to a lesser extent when interest rates decline and generally decline in value to a similar or greater extent when interest rates rise.

Mortgage-Backed Securities Risk. Mortgage-backed securities (“MBS”) represent an interest in a pool of mortgages. Mortgage-backed securities generally are classified as either commercial mortgage backed securities (“CMBS”) or residential mortgage-backed securities (“RMBS”), each of which are subject to certain specific risks. The risks associated with mortgage-backed securities include: (1) credit risk associated with the performance of the underlying mortgage properties and of the borrowers owning these properties; (2) adverse changes in economic conditions and circumstances, which are more likely to have an adverse impact on mortgage-backed securities secured by loans on certain types of commercial properties than on those secured by loans on residential properties; (3) prepayment risk, which can lead to significant fluctuations in the value of the mortgage-backed security; (4) loss of all or part of the premium, if any, paid; and (5) decline in the market value of the security, whether resulting from changes in interest rates, prepayments on the underlying mortgage collateral or perceptions of the credit risk associated with the underlying mortgage collateral. The value of mortgage-backed securities may be substantially dependent on the servicing of the underlying pool of mortgages. Income from and values of MBS also may be greatly affected by demographic trends, such as population shifts or changing tastes and values, or increasing vacancies or declining rents resulting from legal, cultural technological, global or local economic developments, as well as reduced demand for properties. In addition, the general effects of inflation on the U.S. economy can be wide-ranging, as evidenced by rising interest rates, wages and costs of consumer goods and necessities. The long-term effects of inflation on the general economy and on any individual mortgagor are unclear, and in certain cases, rising inflation may affect a mortgagor’s ability to repay its related mortgage loan, thereby reducing the amount received by the holders of MBS with respect to such mortgage loan. Additionally, increased rates of inflation, as are currently being experienced, may negatively affect the value of certain MBS in the secondary market.

Collateralized Loan Obligation (“CLO”), Collateralized Debt Obligation (“CDO”) and Collateralized Bond Obligation (“CBO”) Risk. In addition to the general risks associated with debt securities discussed herein, CLOs, CDOs, CBOs are subject to additional risks due to their complex structure and highly leveraged nature. CLOs, CDOs and CBOs are subject to risks associated with the possibility that distributions from collateral securities may not be adequate to make interest or other payments. The value of securities issued by CLOs, CDOs and CBOs also may change because of changes in market value; changes in the market’s perception of the creditworthiness of the servicer of the assets, the originator of an asset in the pool, or the financial institution or fund providing the credit support or enhancement; loan performance and prices; broader market sentiment, including expectations regarding future loan defaults; liquidity conditions; and supply and demand for structured products. Additionally, the indirect investment structure of CLOs, CDOs and CBOs

presents certain risks to the Trust such as less liquidity compared with holding the underlying assets directly. CLOs, CDOs and CBOs normally charge management fees and administrative expenses, which would be borne by the Trust.

Investment Funds Risk. As an alternative to holding investments directly, the Trust may also obtain investment exposure to securities in which it may invest directly by investing up to 20% of its Managed Assets in Investment Funds. Investments in Investment Funds present certain special considerations and risks not present in making direct investments in securities in which the Trust may invest. Investments in Investment Funds involve operating expenses and fees that are in addition to the expenses and fees borne by the Trust. Such expenses and fees attributable to the Trust’s investment in another Investment Fund are borne indirectly by common shareholders. Accordingly, investment in such entities involves expense and fee layering. To the extent management fees of Investment Funds are based on total gross assets, it may create an incentive for such entities’ managers to employ financial leverage, thereby adding additional expense and increasing volatility and risk. A performance-based fee arrangement may create incentives for an adviser or manager to take greater investment risks in the hope of earning a higher profit participation. Investments in Investment Funds frequently expose the Trust to an additional layer of financial leverage. The use of leverage by these Investment Funds may cause these Funds’ market price of common shares and/or NAV to be more volatile and can magnify the effect of any losses.

In addition to the foregoing risks, investors should note that the Trust reserves the right to merge or reorganize with another fund, liquidate or convert into an open-end fund, in each case subject to applicable approvals by shareholders and the Trust’s Board of Trustees as required by law and the Trust’s governing documents.