Dow slides more than 400 points Monday as new Trump tariffs incite sell-off: Live updates CNBCStocks drop after Trump announces tariffs on countries including Japan and South Korea CNNTrump's new tariff letters could put stock market optimism to the test CNBCStock market today: Dow, S&P 500, Nasdaq futures fall as Trump warns of 10% BRICS tariff, deals deadline looms Yahoo F
