Wall Street’s superstars tumbled Monday as a competitor from China threatens to upend the artificial-intelligence frenzy they’ve been feasting on. The S&P 500 dropped 1.5%, dragged down in large part by a 16.

Wall Street’s superstars are tumbling Monday as a competitor from China threatens to upend the artificial-intelligence frenzy they've been feasting on. The S&P 500 was down 1.

Wall Street’s superstars are tumbling Monday as a competitor from China threatens to upend the artificial-intelligence frenzy that’s created a spending bonanza. The S&P 500 was down 1.

Wall Street is tumbling on fears the big U.S. companies that have feasted on the artificial-intelligence frenzy are under threat from a competitor in China

On the winning side of Wall Street were Novo Nordisk’s U.S.-listed shares, which jumped 8.5%. The Danish company reported results from a clinical trial of a treatment for people who are overweight or obese, which could mean bigger profits in the future.

Asian shares were mixed in thin Lunar New Year trading on Tuesday after Wall Street’s tech superstars tumbled as a competitor from China raised doubts over the recent artificial-intelligence market frenzy.

World shares were mostly lower on Monday after U.S. stocks edged back from their all-time high, with many Asian markets closed for holidays.

Investors dumped technology stocks in premarket trading Monday, sending U.S. indexes sharply lower after Chinese artificial intelligence startup DeepSeek demonstrated a chatbot that it says rivals the

Wall Street’s superstars are tumbling Monday as a competitor from China threatens to upend the artificial-intelligence frenzy they've been feasting on.

Wall Street is tumbling on fears the big U.S. companies that have feasted on the artificial-intelligence frenzy are under threat from a competitor in China. The

U.S. stocks rose to a record Thursday as Wall Street regained some of the momentum that catapulted it to 57 all-time highs last year.