https://www.reuters.com/article/us-retail-trading-testimony-quotes/the-gamestop-testimonies-key-quotes-idUSKBN2AH2VN >Ahead of a grilling by lawmakers over the frenzied trading in retailer GameStop, Melvin Capital Management Chief Executive Gabriel Plotkin, Robinhood Markets CEO Vladimir Tenev and Keith Gill, a YouTube streamer known as Roaring Kitty, laid out their defense.