Ken Griffin, the founder of hedge fund Citadel and market maker Citadel Securities, had an insight into what to expect from the rest of a five-hour Congressional hearing on February 18 when Maxine Waters, chairwoman of the House of Representatives financial services committee, demanded that he answer some questions with ‘yes’ or ‘no’ answers.
After a query about market share, Waters asked whether Griffin could confirm that on January 27, the peak of the frenzy in GameStop trading, Citadel Securities had executed 7.4
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