https://techcrunch.com/2021/01/28/robinhood-users-say-its-restricting-trades-after-the-gamestop-brouhaha-shakes-markets/

Update: Robinhood has made public note of the changes, stating that “in light of recent volatility” it is “restricting transactions for certain securities to position closing only, including $AMC, $BB, $BBBY, $EXPR, $GME, $KOSS, $NAKD and $NOK.” The company added that it has “raised margin requirements for certain securities.”

Robinhood, the popular consumer trading application, has restricted its users from making some popular investments and wagers, public reports indicate. Social media is awash with notes from individual Robinhood users indicating that some popular securities are now untradable, and the company reportedly sent out a note yesterday saying that it is “implementing certain restrictions for for GME [GameStop] and AMC [the theater chain] options trading.”