Wall Street ends higher on AI strength; steelmakers climb on Trump tariff threat
Wall Street's main indexes closed higher on Monday, lifted by Nvidia and other AI-related stocks, while steelmakers surged after U.S. President Donald Trump said he would impose additional tariffs on steel and aluminum imports. Trump's latest potential trade barrier escalation came on Sunday when he said he would introduce 25% tariffs on all U.S. imports of steel and aluminum, on top of existing duties on the metals. Nucor, U.S. Steel and Steel Dynamics rose more than 4% each.