“It’s a wild time,” Mike Loukas, CEO of TrueMark Investments, told ABC News. The volatility poses a challenge for market strategists, since the swings in day-to-day stock prices can be traced in large part to White House policies and announcements, rather than to economic data or corporate profits, analysts said.

Stan Druckenmiller, Bill Ackman and Jamie Dimon are among those raising concerns about the president’s steep, across-the-globe levies.