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Jamie Dimon just sounded the alarm on auto loans

The JPMorgan Chase CEO says "someone is going to get hurt" as financing for autos has flourished in the U.S.

Jamie Dimon is sounding the alarm on auto loans.

"Auto is clearly a little stretched, in my opinion," the JPMorgan Chase CEO said Thursday morning, speaking at the AllianceBernstein Strategic Decisions Conference in New York. "Someone is going to get hurt. ... We don't do much of that."

But other lenders have.

The average size of new auto loans is rising, as is the average payment size, according to research from Experian released Thursday morning.

Jamie Dimon, chief executive officer of JPMorgan Chase
David Paul Morris | Bloomberg | Getty Images
Jamie Dimon, chief executive officer of JPMorgan Chase

In May, the total amount of auto loans cracked the $1 trillion mark for the first time, marking a 10 percent increase. It comes as auto sales have hovered around record highs.

At more than $30,000, the average auto loan for a new car is also at an all-time high, according to Experian. Also, at more than $500, the average monthly auto loan payment is at a record.

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The Experian research also noted that more subprime borrowers are borrowing for new auto purchases.

"The continued rise in new vehicle costs have kept many consumers exploring options to keep their monthly payments affordable," said Melinda Zabritski, Experian's senior director of automotive finance, in a statement that accompanied Thursday's research. "As long as vehicle prices continue to rise, we can expect leasing rates to grow along with them. However, consumers need to understand the nuances of their lease agreements and make sure that leasing fits their lifestyle."