JPM’s Jamie Dimon warns of market panic as U.S. nears default

JPMorgan Chase CEO Jamie Dimon said Thursday that markets will be gripped by panic as the U.S. approaches a possible default on its sovereign debt.

An actual default would be “potentially catastrophic” for the country, Dimon told Bloomberg in a televised interview. Dimon said he expects that worst-case scenario will be avoided, however, because lawmakers will be forced to respond to growing concern.

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“The closer you get to it, you will have panic” in the form of stock market volatility and upheaval in Treasuries, he said.

Dimon joined a host of business figures and administration officials making dire predictions about the consequences of failing to raise or suspend the U.S. debt limit and allowing the world’s largest economy to default on its bonds. Treasury Secretary Janet Yellen has said the idea that the country could default should be “unthinkable” and would lead to economic disaster.

“If it gets to that panic point, people have to react, we’ve seen that before,” Dimon said.

But “it’s a really bad idea, because panic becomes something that is not good,” he added. “It could affect other markets around the world.”

JPMorgan, the biggest U.S. bank with about $3.7 trillion in assets, has been preparing for the risk of an American default, said Dimon.

Such an event would ripple through the financial world, impacting “contracts, collateral, clearing houses, and effect clients definitely around the world,” he said.

The bank’s so-called war room has been gathering once weekly, a rate that will shift to daily meetings around May 21 and then three meetings daily after that, he said.

He exhorted politicians from both major U.S. parties to compromise and avoid a ruinous outcome.

“Please negotiate a deal,” Dimon said.

This story is developing. Please check back for updates.