Taiwan Semiconductor Manufacturing, the world's largest maker of advanced chips, is expanding its bet on the AI boom. According to EE Times, the company is raising its 2026 capital budget to $64 billion and adding $100 billion to its US investment, aimed at AI production.

Much of the new US money is headed to Arizona. The New York Times and BBC report TSMC pledged the additional $100 billion to expand production there. Per MacDailyNews, the move brings TSMC's total US commitment to a record $265 billion and adds four new facilities for a total of 12, secured under the Trump administration.

The expansion rides on booming demand. Multiple outlets report TSMC's second-quarter profit surged 77%, a record, as AI chip orders stayed strong. According to finance.biggo.com, TSMC lifted its revenue outlook to over 40% and called AI demand "robust through 2030." The Next Platform notes AI chips now drive around a third of TSMC's revenues.

Still, investors reacted coldly. The Philadelphia Semiconductor Index plunged over 4%, and biggo.com reports TSMC's bullish earnings call failed to stem the sell-off, with Taiwan index futures tumbling in night trading. Invezz reports memory names like Micron and SK Hynix fell as well. Morgan Stanley attributed the extra spending partly to cost inflation from higher equipment prices, noting disappointment over the hit to TSMC's margins.

Why it matters: TSMC makes the chips that power the AI industry, so its spending signals confidence in years of demand — even as rising costs and a jittery market show that betting on the boom carries real risk.