Major indexes tumbled on Monday, with the Dow falling over 400 points as investors digested Trump's latest trade updates.

U.S. automakers worry that President Donald Trump’s agreement to tariff Japanese vehicles at 15% would put them at a competitive disadvantage, saying they will face steeper import taxes on steel, aluminum and parts than their competitors,

Trump said the U.S. will impose a 15% tariff on Japanese imports under the agreement, which he hailed as "maybe the largest deal in history."