Congressional hearing into the GameStop mania that triggered the largest weekly selloff since late October is underway, with some of the key players in the saga—billionaire Citadel CEO Kenneth Griffin, Robinhood CEO Vladimir Tenev, Reddit Cofounder Steve Huffman and the 34-year-old securities broker behind the Roaring Kitty online persona—all set to testify.

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Congress holds GameStop Hearing On Market Manipulation