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,

The JPMorgan CEO said that even if the tariffs prompt a global trade war and reignite inflation in the U.S., they could protect American interests.

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 (JPM) chief Jamie Dimon said the use of tariffs, an economic weapon, may trigger some inflation, but national security is more important than "a bit more inflation," according to a media report.