Stocks plummeted Thursday, sending the S&P 500 back into correction territory for its biggest one-day loss since 2020, after President Donald Trump unveiled sweeping tariffs, raising the risk of a global trade war that plunges the economy into a recession.The broad market index dropped 4.84% and settled at 5,396.52, posting its worst day since June 2020. The Dow Jones Industrial Average tumbled 1,679.39 points, or 3.98%, to close at 40,545.93 and mark its worst session since June 2020. The Nasdaq Composite plummeted 5.97% and ended at 16,550.61, registering its biggest decline since March 2020. The slide across equities was broad,...