J.P. Morgan Chase CEO Jamie Dimon told CNBC that negative interest rates are one of the only things that concern him in a market.

"The only thing I have trepidation about is negative interest rates, QE, and the diversion between stock prices and bond prices and yield and stuff like that," Dimon said on "Squawk Box".

"It's kind of one of the great experiments of all time, and we still don't know what the ultimate outcome is," Dimon said.

Negative interest rates have been used by central banks in Japan and Europe to try to stimulate their stubbornly stagnant economies.

"I think it's very hard for central banks to forever make up for bad policy elsewhere," Dimon said. "That puts in them in a trap. We're a little bit in that trap today with rates so low around the world."

"I would never buy a negative rate bond, not unless I was forced," Dimon added. "In history whenever you've seen anything like that, it doesn't necessarily end well."

Dimon added that he was worried about the repercussions from quantitative easing, along with risks from cyber attacks or geopolitical events.