But the episode will most likely reinvigorate a push to expand the regulation of derivatives, which have been associated with many prominent financial blowups. During the 2008 crisis, the insurance giant AIG nearly collapsed under the weight of unregulated swaps contracts it wrote.

The cascade of problems that began with Archegos was only the latest example of derivatives’ ability to increase unseen risk.

“During the financial crisis of 2008, one of the biggest problems was that many of the banks didn’t know who owed what to whom,” said Tyler Gellasch, a former S.E.C. lawyer who heads the Healthy Markets Association, a group that pushes for market reforms. “And it seems that happened again here.”

Matthew Goldstein contributed reporting.

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