Casino-like swings in stock prices of GameStop reflect wild levels of speculation that don’t help GameStop’s workers or customers and could lead to market instability. Today I told the SEC to explain what exactly it's doing to prevent market manipulation. https://www.warren.senate.gov/newsroom/press-releases/new-this-am-warren-calls-on-the-sec-to-address-stock-market-gamesmanship-amid-volatile-gamestop-trades …pic.twitter.com/MAbjHcq47i