Investing.com -- Taiwan Semiconductor Manufacturing (NYSE: TSM) reported a 77% year-on-year surge in Q2 2026 net profit to a record T$706.6 billion ($21.99 billion) on Thursday, blowing past Wall Street's EPS estimate of $3.80 with a print of $4.31, yet the stock was indicated about 4% lower in premarket trading as investors weighed a sharply expanded capital spending plan against near-term margin pressure.

NVIDIA, TSMC's largest customer and the primary beneficiary of its advanced-node capacity, was also indicated lower in premarket, down 1.3%, as the chipmaker's capex reset rippled across the semiconductor sector. AMD is down 2.7%, while Intel and Micron fell 1.9% and 2.4%, respectively.

The results themselves were difficult to fault on the headline. Q2 revenue of $40.2 billion edged past the $39.94 billion consensus, and the record profit figure marked a fifth consecutive quarter of all-time highs for the Hsinchu-based foundry.

TSMC also lifted its full-year 2026 revenue growth guidance to "slightly above 40%", a meaningful step up from its prior forecast of more than 30%, crediting what it called "extremely robust" AI demand and noting that the emergence of agentic AI is driving a resurgence in CPU consumption alongside accelerators in data centers.

The source of investor unease lay elsewhere. TSMC raised its 2026 capital expenditure budget from the high end of $52-56 billion to $60-64 billion, citing continued structural demand from customers including those in the nascent agentic AI market.

The company simultaneously unveiled an additional $100 billion investment in Arizona, extending a U.S. commitment that has already reshaped its global footprint.

For Q3, TSMC guided revenue at $45.2 billion against a Street consensus of $43.1 billion, a bullish top-line call, but guided operating margins at roughly 57%, approximately 70 basis points below what analysts had expected.

Gross margins in the second half are seen falling relative to the first half, pressured by the steep production ramp of the company's 2-nanometer process technology.

"The revenue dynamics remain robust as the AI boom continues, although there are some negative wrinkles in the report — including the modest margin pressure and comments about pockets of softness in certain consumer markets — while the higher capex budget raises the same debate as before about whether semis are cyclical or secular," Vital Knowledge analyst Adam Crisafulli said.

"If it's more the former, then accelerating capacity additions are usually a sign to fade the group instead of chase it."

That cyclical-versus-secular debate has a specific financial mechanic. When a high-multiple company resets its capex envelope upward, investors immediately re-underwrite its forward free-cash-flow curve: higher spending implies lower near-term free cash flow, higher depreciation loads, and a delayed return of capital to shareholders.

For a stock like TSM, trading near $1.96 trillion in market capitalization and up roughly 71% over the prior year through Wednesday's close of $419.48, even modestly disappointing guidance on cash generation can justify swift multiple compression.

The result is what traders call a "beat-and-worry" session, where record backward-looking results are met with selling on the forward-looking reset.