Trump’s second term brings worst stock market start since 2001

The U.S. stock market is down almost 10% since President Donald Trump’s inauguration, marking the worst 10-week start under a new president since George W. Bush in 2001 during the height of the dot-com selloff.

The S&P 500 Index is virtually in a correction over the 52 trading sessions since Trump swore the oath of office Jan. 20. More than $3 trillion has been erased from the index’s value over that stretch. That’s worse than the start to the prior five administrations, only exceeded...