Back down goes Wall Street. U.S. stocks are resuming their sharp slide Thursday, led by the market’s AI superstars that are now feeling the painful downside of big expectations. The S&P 500 was down 1% in morning trading,

Stocks are falling again on Wall Street as companies and investors react to President Donald Trump’s decision to impose tariffs on the U.S.’s biggest trading

The S&P 500 was 1.1% higher in afternoon trading, bouncing back from its sell-off that had erased all of its “Trump bump " since the president's election in November. The Dow Jones Industrial Average was up 493 points, or 1.2%, as of 2:45 p.m. Eastern time, and the Nasdaq composite was 1.3% higher.