TSMC’s record earnings meet a 16.4% October stock reversal

By Rebecca Stone

Taiwan Semiconductor Manufacturing Company (TSMC) shares closed at $406.13 on Oct. 30, 2026, 16.4% below their $485.80 October closing high, as record third-quarter results and higher guidance failed to blunt selling in technology and AI-linked semiconductor stocks.

TSMC lost 5.95% in the Oct. 30 session, when nearly 22 million shares changed hands. The month produced an approximately 16% decline. What began as a strong early rally ended with investors questioning how much AI-driven growth was already reflected in semiconductor valuations.

What broke TSMC’s October rally?

TSMC entered October at $459.20 on Oct. 1 and reached a monthly closing high of $485.80 on Oct. 5. The advance lasted four calendar days. Then investors began reassessing semiconductor valuations as questions mounted around the durability of artificial-intelligence spending.

By Oct. 14, the stock had retreated to $430. Two days later, it declined to $412.61. A brief recovery lifted shares to $439.51 on Oct. 28, but renewed selling erased that gain before the Oct. 30 close.

The reversal did not accompany a disclosed deterioration in foundry demand. The report instead linked the decline to concern about AI spending and the valuations of semiconductor companies positioned to benefit from it.

The market was not rejecting a weak quarter. It was repricing the outlook for an AI spending cycle whose near-term shape remained uncertain. TSMC’s reported numbers strengthened, while investors demanded a clearer view of how that growth would persist.

Did record earnings change the outlook?

In its Oct. 15 third-quarter results, TSMC reported revenue of $46.72 billion, up 41.2% year over year in U.S.-dollar terms. Net profit climbed 68.7% to NT$763.06 billion. The company also said demand for “advanced semiconductor manufacturing” remained strong.

Those revenue and profit numbers were reported results. TSMC’s forward guidance called for full-year revenue growth of approximately 44% and fourth-quarter revenue of $52.3 billion to $54.3 billion. The report cited no analyst estimate for either forecast; both represented company guidance.

Even so, shares fell 1.80% on the earnings-announcement day and another 2.28% in the following session. Strong numbers did not settle the valuation debate, and the late-October recovery failed to hold.

That split made the earnings release less a verdict on current operations than a test of investor expectations. The results supplied a firm operating base; the share-price response showed that expectations had already moved further.

The figures in the report did not break out process nodes, wafer sizes, product families or installed capacity. Investors received consolidated revenue and profit growth but no node-level or product-level capacity data showing the manufacturing mix behind that performance.

What does the Nov. 10 revenue release show?

TSMC’s next scheduled catalyst is its October revenue announcement on Nov. 10. The figures could provide a fresher read on semiconductor demand than the third-quarter results, particularly on whether demand remained strong after the reporting period.

The announcement was described only as an October revenue release, not another full quarterly earnings report. The source provided no margin data, pricing information or customer-order breakdown with which to judge the quality of the top-line result.

TSMC entered November with two conflicting signals: 41.2% year-over-year quarterly revenue growth and roughly 44% full-year growth guidance on one side, and a 16.4% retreat from the October high on the other. Neither figure explains investor positioning by itself.

If October revenue supports the path toward the $52.3 billion–$54.3 billion fourth-quarter range, operating momentum may again confront the de-rating of AI-linked semiconductor shares. If it does not, the selloff could look less like a temporary correction and more like sustained pressure on semiconductor valuations.

The Nov. 10 revenue release will test whether AI-era demand can outrun the broader repricing; until then, TSMC’s $52.3 billion–$54.3 billion fourth-quarter guidance remains the clearest near-term benchmark.