Robinhood, Melvin Capital, Citadel execs expected to testify in Congress on GameStop turmoil - sources<blockquote>Robinhood、Melvin Capital、Citadel高管预计将就游戏驿站动荡在国会作证——消息人士</blockquote>
WASHINGTON, Feb 10 (Reuters) - Executives from Robinhood, Melvin Capital and Citadel Securities are