Why is TSMC stock rallying today?

Taiwan Semiconductor Manufacturing stock rallied 4.2% to NT$2,380 on Wednesday after its board approved a sweeping set of resolutions on November 10 that cemented the company’s strategic pivot deeper into the AI value chain.

The board greenlit investments of up to $500 million in Anthropic at its IPO price and up to $500 million in OpenAI preferred stock — a combined commitment of up to $1 billion that marks TSMC’s first direct equity stakes in AI model companies, rather than simply manufacturing chips for them.

Underpinning the move further, TSMC simultaneously reported record October 2026 revenue of approximately NT$586.89 billion, a figure representing nearly 60% growth year-over-year and roughly 15% growth from the prior month, driven by relentless AI chip demand.

The broader Taiwan market provided a powerful tailwind, with the TAIEX surging more than 1,000 points intraday for a third consecutive session, its recovery fueled by the continued effect of Taiwan’s Financial Supervisory Commission short-selling curbs.

Upbeat overnight earnings from CoreWeave-- which helped dispell concerns over stretched AI debt levels-- also sparked a broader rally in the AI trade on Wednesday.