Dimon, Ackman warn on tariffs as Wall Street roiled by trade war
Wall Street leaders issued warnings on U.S. tariffs, with JPMorgan Chase CEO Jamie Dimon saying they could have lasting negative consequences, while fund manager Bill Ackman said they could lead to an "economic nuclear winter." In Dimon's annual letter to shareholders, published on Monday following a rout last week that wiped off trillions of dollars from global stock markets, he expressed concern about how the tariffs would impact America's long-term economic alliances. "The economy is facing considerable turbulence (including geopolitics)," Dimon wrote.