GameStop frenzy puts spotlight on trading giant Citadel Securities
Firm owned by hedge-fund billionaire Ken Griffin executes orders for Robinhood customers
Firm owned by hedge-fund billionaire Ken Griffin executes orders for Robinhood customers
Small investors banding together online to pump up stocks like GameStop Corp. say they are defying Wall Street. But one of the biggest players in global markets stands to benefit from their frenetic trading.