https://www.reuters.com/article/us-retail-trading-testimony/robinhood-hedge-funds-and-roaring-kitty-defend-gamestop-moves-ahead-of-hearing-idUSKBN2AH2QE >A Wall Street hedge fund manager, the chief executive of Robinhood and a YouTube streamer known as "Roaring Kitty" laid out their defense on Wednesday ahead of a grilling by lawmakers over the Reddit-fueled rally in retailer GameStop Corp.