https://www.reuters.com/article/us-retail-trading-congress-shorting/short-selling-under-spotlight-in-gamestop-hearing-idUSKBN2AJ026 >Short selling was under the microscope on Thursday as a U.S. House committee grilled executives from trading app Robinhood and hedge funds Melvin Capital and Citadel over the GameStop Corp trading frenzy, with some calling for change.