Why is Taiwan Semiconductor Manufacturing stock surging today?

Investing.com -- Taiwan Semiconductor Manufacturing Co Ltd BDR surged 6.6% to trade at R$259.50, as Taiwan’s Financial Supervisory Commission enacted emergency short-selling curbs that took effect today, slashing the cap on intraday short-sell orders from 30% to just 3% of a stock’s 30-day average daily volume while simultaneously raising minimum margin requirements on short positions to 130% from 90%. The measures were a direct regulatory response to the brutal semiconductor selloff that had battered TSMC shares in Taipei and its BDR on B3 over the preceding week, following investor anxiety about the pace of AI data center investment after the U.S. midterm elections.

Adding further momentum, reports surfaced that TSMC is drawing up plans to enter the advanced memory chip market by manufacturing vertically stacked DRAM at the request of Nvidia, its largest customer — a development that, if confirmed, would represent a significant expansion of the company’s addressable market. Taiwan’s Finance Ministry also reinforced confidence by confirming a NT$500 billion stabilization fund remains available as a backstop. These factors combined to push the Taiwan Weighted Index up as much as 6.7% on the day, with TSMC shares in Taipei ending approximately 4.7% higher, a gain that translated directly into the BDR’s sharp move on B3.

The broader semiconductor sector participated in the recovery across Asia and Europe, though the dynamic was notably split: the Nvidia CEO controversy weighed on that stock specifically, while TSMC — as the foundry that manufactures chips for Nvidia, Apple, and AMD — was seen as insulated from the reputational risk, prompting rotation into the chipmaker. On the macro side, the Ibovespa had already shown resilience, closing the prior Friday session up 1.39% at 168,498 points, while U.S. equities provided a supportive global backdrop with the S&P 500 and Dow Jones both advancing. The Banco Central do Brasil’s decision to hold the Selic rate at 13.75% on November 5 maintained a stable domestic monetary environment.

Taken together, the combination of targeted regulatory relief in Taiwan, a compelling new growth narrative around memory chip production, a recovering global semiconductor sector, and a constructive macro backdrop created the conditions for TSMC34 to reclaim significant ground today — trading well above its session open of R$258.90 and within reach of the day’s high of R$262.20, though still meaningfully below its 52-week peak of R$309.32.

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