Businesses worldwide and mainstream economists are fretting about higher prices as President Donald Trump unveils his tariff-heavy economic strategy. But Jamie Dimon, CEO of the world’s largest bank,

The JPMorgan Chase chief executive, who had warned of the negative effect of tariffs, said they could be justified for national security reasons.

JPMorgan Chase CEO Jamie Dimon has changed his tune on tariffs, saying Wednesday that they're a valuable economic tool. "They're an economic weapon, you know, depending how you use it why you use it,