“We come in every day at 3:30 a.m. and leave at 6 p.m. I’m not used to setting my alarm for 2:45 a.m., but these are extraordinary times.”

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In the meantime, analysts say, a broader reconsideration of derivatives and the shadow banking system is also in order. “Not all innovation is good,” says Mr. Whalen of Institutional Risk Analytics. “If it is too complicated for most of us to understand in 10 to 15 minutes, then we probably shouldn’t be doing it.”