Jamie Dimon, chief executive officer of J.P. Morgan. Andrew Harrer/Bloomberg News
J.P. Morgan Chase & Co. Chief James Dimon said the U.S. economy is likely to worsen after growing for the past five years.

“It’s as good as it’s ever been,” he said on an earnings call with analysts after the company released fourth-quarter results Thursday morning. “Obviously it’s going to get worse.”

Mr. Dimon said he wasn’t ready to forecast a recession, but said the latest data suggest the economy is near the top of a cycle and could trend downward soon.