Shares of Taiwan Semiconductor Manufacturing Company rebounded approximately 2% on the Taiwan Stock Exchange on Monday, partially reversing a sharp 7.3% single-session decline that occurred Friday in the immediate aftermath of the chipmaker's announcement that it would invest an additional $100 billion in US semiconductor manufacturing, raising its total committed investment in American chip production to $265 billion across twelve facilities in Arizona.
The initial Friday selloff reflected a complex set of market reactions to what TSMC Chairman and CEO CC Wei called the largest single foreign direct investment in US history. A segment of investors interpreted the enormous capital commitment — which supplements $165 billion already pledged for six fabrication plants in Phoenix — as evidence that TSMC faces either political pressure to shift production away from Taiwan or mounting cost burdens that could compress margins and return on invested capital over the multi-year buildout horizon. Those concerns drove the immediate selloff even as the strategic and long-term revenue implications of the expansion were broadly viewed as positive.
The US Department of Commerce confirmed the announcement, framing it as the result of a trade and investment agreement between the US and Taiwan signed earlier in 2026 and a product of President Trump's broader push to reshore advanced semiconductor manufacturing. CC Wei, appearing alongside Trump administration officials, said the expansion will add four fabrication facilities to TSMC's Arizona campus, on top of the six plants previously announced, while also including advanced packaging facilities that are increasingly critical for delivering the chip configurations demanded by AI accelerator customers like Nvidia and Apple.
TSMC also raised its full-year 2026 revenue forecast when reporting second-quarter earnings last Thursday, citing record profits driven by surging AI demand. The company is the world's largest contract chip manufacturer, holding approximately 70% of the advanced foundry market, and supplies virtually every major AI and consumer electronics chipmaker including Nvidia, AMD, Apple, Qualcomm, and Broadcom. Its P/E ratio of approximately 32.8 times trailing earnings reflects investor pricing of continued outsized growth from the AI semiconductor cycle.
The partial recovery in TSMC shares on Monday suggests that investors who sold on Friday were reacting to near-term cost concerns rather than fundamental doubts about demand. Taiwan's broader Taiex index edged marginally lower on the day, in contrast to the Kospi's 4.9% plunge in South Korea, underscoring a divergence in how investors across Asia are parsing the AI semiconductor investment cycle depending on whether a company is a capital recipient of the US buildout or a supplier potentially at risk from shifting allocation of global chip manufacturing capacity.
For US investors, TSMC's ADRs listed on the New York Stock Exchange under the ticker TSM were expected to trade in line with the partial Taiwan recovery after a pronounced move lower on Friday. The stock carries direct implications for Nvidia, Apple, AMD, and Broadcom, which all depend on TSMC's advanced nodes for their leading products and whose earnings prospects are intertwined with TSMC's ability to deliver capacity on schedule at both its existing Taiwan fabs and the expanding Arizona facilities.