https://www.reuters.com/article/us-retail-trading-plotkin/melvins-plotkin-says-fund-follows-rules-gamestop-frenzy-humbled-him-idUSKBN2AH2V0 >Gabriel Plotkin will on Thursday explain his hedge fund's massive losses in the GameStop trading frenzy, and he plans to tell U.S. lawmakers that Melvin Capital Management follows securities laws, does not manipulate stocks and conducts extensive research before making bets.