Markets slide as tariff hikes and AI fears weigh on stocks

U.S. stocks fell after President Trump raised tariffs to 15% for up to 150 days, with the S&P 500 down about 1% and the Dow slumping around 821 points as investors also punished companies viewed as AI losers. Tech and cybersecurity names like CrowdStrike and AppLovin led declines, while Blue Owl Capital slid; airlines dropped on winter weather disruptions and Novo Nordisk tumbled after a drug-trial result. Gold rose and bitcoin briefly dipped as risk sentiment shifted, and traders awaited Nvidia’s results while Federal Reserve commentary kept rate-cut expectations in play. The 10-year Treasury yield slipped to 4.03%.