If you follow the stock market, then you know all about the bogeyman scaring Wall Street right now: DeepSeek.

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.

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.

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,