Jamie Dimon, CEO of JPMorgan ChaseAlex Brandon/AP "There could be hell to pay" if private credit markets wobble, Jamie Dimon said. He warned that there are bad actors in the industry, and they'll likely be the source of any issues. "I don't think it's systemic, but I do expect there to be problems." JPMorgan Chase CEO Jamie Dimon said private credit could spark turmoil if the opaque sector of financial markets weakens.