Wall Street's main indexes were mixed on Monday after President Donald Trump said he plans to double tariffs on imported steel and aluminum, fueling more uncertainty around U.S. trade policies. Trump said late on Friday he planned to increase tariffs on imported steel and aluminum to 50% from 25% starting Wednesday,

Donald Trump’s inconsistent tariff policies have drawn criticism and mockery from Wall Street, with financial experts coining the term “TACO Trade” to describe his tendency to threaten tariffs and then back down.

Trump’s tendency to back off of his most extreme threats recently inspired a Financial Times writer to coin the phrase “ TACO trade ,” for “Trump Always Chickens Out.” But regardless of his reversals,