Apparently Citadel is in bed with Schwab/Ameritrade, too, who also halted trading: "The Verge meanwhile noted one hedge fund suffering amid the GameStop surge

Apparently Citadel is in bed with Schwab/Ameritrade, too, who also halted trading: "The Verge meanwhile noted one hedge fund suffering amid the GameStop surge was Melvin Capital Management, which another hedge fund, Citadel, has since bailed out. Citadel's founder is Ken Griffin, who also founded Citadel Securities, a big investor in Robinhood that also works with TD Ameritrade and Charles Schwab." I suspect they sell them the trading data just like Robinhood does, to help them front-running the retail traders. https://theweek.com/speedreads/963627/robinhood-halts-trading-gamestop-other-heavily-shorted-stocks-hedge-funds-suffer https://theweek.com/speedreads/963627/robinhood-halts-tradin...