TSM stock ends the day 3.52 percent lower at the close

On September 21, 2026, TSM stock closed at USD 418.01 on the NYSE, down 3.52 percent, after trading between an intraday low near USD 429 and pressures that left it trailing broader chip-sector gains. The move came as peers advanced on chip price optimism while Taiwan’s market finished sharply higher.

TSM stock, representing the U.S.-listed ADRs of Taiwan Semiconductor Manufacturing, closed at USD 418.01 on the NYSE on September 21, 2026, down 3.52 percent from the prior close per exchange data published by MarketWatch. Compared with a rally in major U.S. chip names, the ADRs lagged sector strength as broader tech indices advanced.

September 21, 2026 in numbers

Taiwan Semiconductor Manufacturing Co. Ltd. (ISIN US8740391003, NYSE: TSM) finished the regular session at USD 418.01 after opening modestly higher and then slipping through the day, with the close sitting toward the lower end of the intraday range per MarketWatch data. Per the same overview, the prior close stood at USD 433.24, implying the 3.52 percent decline, while the reported 52-week range kept today’s level comfortably above the 52-week low and below the recent high, underscoring how the pullback came after a strong longer-term run.

According to a sector wrap from TradingKey, large U.S.-listed chip peers such as Nvidia and AMD posted gains of about 2 to 5 percent on the day, indicating that TSM underperformed the chip cohort despite the supportive backdrop. In Taiwan, shares of TSMC on the local exchange added 0.81 percent to their close, contributing significantly to the Taiex’s rise, per a market report from Focus Taiwan, highlighting a divergence between the home market and the ADRs that largely reflects exchange-rate effects and U.S.-specific trading dynamics.

After the bell and the next session

In after-hours trading, a late-evening snapshot from finanzen.ch showed the Taiwan Semiconductor ADRs changing hands at USD 442.15 in New York at 8:26 p.m. ET, up about 1.7 percent from the regular-session close, suggesting some buying interest after the bell. A separate chip-sector note from Yahoo Finance highlighted optimism around potential wafer and chip price increases, which could remain a focus for investors into the next U.S. trading day on September 22, 2026, as markets assess the earnings and margin implications for TSM and its peers.