Taiwan Semiconductor Manufacturing Co. (TSM), Broadcom Inc. (AVGO), and other semiconductor companies fell in pre-market trade on Monday as Chinese AI startup DeepSeek’s open-source model threatened the hegemony of industry leader OpenAI.

Apple emerges as a “relative winner” as DeepSeek shifted investor narratives on AI, wrote Morgan Stanley analysts led by Brian Nowak in a Tuesday note to clients, explaining Apple’s “AI ambitions are far more contained” than the other “magnificent seven” American tech leaders.

DeepSeek topped the Apple App Store chart and sparked fears the Chinese company was quickly catching up with OpenAI's ChatGPT while costing far less.

Who will drive the stock market as the Fed holds its first meeting of the year? This could be the worst day in nearly five years for the PHLX Semiconductor Index, led by major weakness in hot artificial-intelligence plays like Nvidia Corp.

Nvidia staged a moderate rebound on Tuesday, rising as much as 3%, following a 17% drop the prior day. More broadly, major US indexes rallied after the S&P 500 and Nasdaq 100 saw sharp losses on Monday amid concerns over the Chinese AI firm DeepSeek's rapid and seemingly cost-effective advances.

Rebounding tech stocks drove U.S. indexes higher Tuesday, a day after they tumbled on doubts about whether the artificial-intelligence frenzy really needs all the dollars being poured into it. The S&P 500 climbed 0.

By Sinéad Carew, Amanda Cooper, Ankur Banerjee NEW YORK/LONDON/SINGAPORE (Reuters) -Global investors dumped tech stocks on Monday as they worried that the emergence of a low-cost Chinese artificial intelligence model would threaten the dominance of AI leaders like Nvidia,