U.S. steelmaker shares soared on news of President Trump’s new tariffs. But are these tariffs as bulletproof as investors seem to believe? The steel tariffs, like those on autos and auto parts, are sector-based.

Consumers are watching what effect President Trump's tariffs will have on homebuilding, as Trump doubled down on steel import taxes.

Major steel stocks jumped Monday after President Donald Trump hiked tariffs tied to the metal. Trump said Friday at a Pennsylvania rally he would double tariffs on steel imports to 50% from 25%, a move that inflamed trade tensions again and drew criticism from global partners.