Jamie Dimon has a warning for anyone who thinks the market is too steady to worry about. The JPMorgan Chase CEO told CNBC that markets are still heavy with borrowed money, and some of that borrowing is hard to see.
In an interview published Wednesday, Aug 5 2026, at 10:02 PM EDT, Dimon said the most visible kind of borrowing, margin debt, has never been higher. Margin debt is money investors borrow from a broker to buy stocks.
But Dimon says the official tally leaves a lot out. "There's a lot of margin debt you don't see because it's not called margin debt," he told CNBC's Leslie Picker.
"It's called other things. It's that kind of leverage, some hidden, some public," he said. He pointed to prime-broker lending, hedge funds, ETFs, and Treasury arbitrage trades as sources of borrowed money.
The warning comes at a tense moment. Stock prices are already high, hedge-fund leverage is close to a record, and Treasury arbitrage positions, which profit from tiny price gaps in bonds, are large.
Hidden leverage can turn a small drop into a big one, because when prices fall, lenders ask for extra collateral. If an investor cannot cover it, they are forced to sell into the slide, which pushes prices down even further.
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That is what Dimon means by a quick disruption. "When you have that, you do have a higher chance that somebody will disrupt the market in a quick way, and people get rattled over it," he said.
There is a recent example, and it is not hard to find. An AI-focused hedge fund called Situational Awareness made big bets with borrowed money on technology stocks, got margin calls, and had to sell much of its public stock holdings.
JPMorgan was among its prime brokers, the banks that lend to hedge funds and process their trades. Dimon said the episode showed markets can handle a single failure.
"The worst thing is if you have actual losses in the marketplace," he said. He predicted that when volatility rises, clearing houses and banks will ask for more collateral.
Dimon is not calling it a systemic risk. "I'm not going to say it's systemic high, it's going to cause a disaster, but it's high," he said.
He also pushed back on the idea that leverage alone caused the 2008 crisis.
"It wasn't the leverage. It was the amount of losses that were going to be realized on mortgages," he said.
The leverage warning is not just a Wall Street worry. It matters for your portfolio because the same markets you invest in are carrying that borrowed money.
Dimon also repeated a warning about bonds. He said strong demand for capital, from government budget deficits, infrastructure spending, and military build-ups around the world, could push long-term yields higher and reignite inflation.
"The remilitarization of the world would be inflationary," Dimon said. He said long-dated bond yields "could be the skunk of the party."
Long-term yields are the interest rates on government bonds that mature over many years. When those yields rise, bond prices fall, which can hurt investors who use bonds as the calm part of a portfolio.
The bottom line: Dimon is not predicting a systemic disaster. He is saying the system holds more borrowed money than it appears, and that makes sudden moves easier to trigger.
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