JPMorgan CEO Jamie Dimon cautioned that periods of calm in credit markets often mask the buildup of risk, warning that performance typically deteriorates more than expected once the credit cycle turns.

"I do think when we have a credit cycle because there have been weakening standards in underwriting and transparency and marking, I do think you'll see credit perform worse than people expect. That's all. I don't think it's systemic," he said during the Reagan National Economic Forum.

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Private credit, one of Wall Street's fastest-growing segments, has come to define the post-bank lending era as private funds increasingly step into roles once dominated by traditional lenders. Its backers tout it as flexible, efficient, and innovative. Dimon, by contrast, sees something more fragile beneath the industry's polished pitch.

He drew a contrast that was hard to ignore. "You've got $1.7 trillion in syndicated leveraged loans, $1.7 trillion in high-yield debt," he said about the sprawling credit markets. Then came the larger pillars of global finance: roughly $15 trillion in investment-grade debt and $13 trillion in mortgages. In that landscape, the $1.7 trillion private credit market is still relatively small.