Asian and European shares slid on Wednesday after U.S. President Donald Trump’s latest tariff hikes took effect and he threatened to add still more. Uncertainty is running high about what Trump will ...

U.S. stocks dropped after a second day of stunning reversals. The S&P 500 fell 1.6% Tuesday after wiping out an early gain of 4.1%, which had it on track for its best day in years. That brought the ...