The House Finance Committee holds a hearing titled “Game Stopped? Who Wins and Loses When Short Sellers, Social Media, and Retail Investors Collide.” Witnesses will include Robinhood CEO Vlad Tenev, Reddit Co-Founder and CEO Steve Huffman, Citadel CEO Kenneth C. Griffin, Melvin Capital CEO Gabriel  Plotkin and investor Keith Gill. Gill is cited by many as a key influencer in the GameStop stock frenzy in January.