US stocks on a roller coaster as Wall Street is rattled by tariffs

U.S. stocks mostly fell after an extremely volatile day Monday — tumbling, surging and then bouncing around in every direction, as traders searched for any sign that President Donald Trump’s tariffs could be negotiated or halted.Markets around the world had tumbled earlier in the day over concerns about how Trump’s sweeping tariffs might upend the global economy and stymie economic growth. US stocks opened the day in bear market territory but surged an hour later on rumors that the Trump administration may pause tariffs — perhaps for several months.That rumor turned out to be just that . . .