Robinhood has added new limits to its app to restrict users from buying or trading any of the popular Reddit r/WallStreetBets stocks, including GameStop ($GME), AMC ($AMC), BlackBerry ($BB), Bed Bath & Beyond ($BBBY), Nokia ($NOK), and more. Users will still be allowed to close out existing positions but won’t be able to buy more of the stocks. The company is citing “recent volatility” in the market as the reasoning behind the change.

We continuously monitor the markets and make changes where necessary. In light of recent volatility, we are restricting transactions for certain securities to position closing only, including $AMC, $BB, $BBBY, $EXPR, $GME, $KOSS, $NAKD and $NOK. We also raised margin requirements for certain securities.

The development is the latest in an ongoing saga that has seen a group of Reddit users from the WallStreetBets subreddit band together in an effort to drive up the stock prices of companies like GameStop and BlackBerry, in defiance of traditional hedge funds that had shorted those firms. Robinhood — a popular stock market application that allows amateur day traders to purchase those stocks without fees — has been a key tool in the Reddit group’s ability to push prices up.

Robinhood isn’t the only major company to stop accepting new trades for GameStop and AMC — more traditional brokerages like Charles Schwab and TD Ameritrade also restricted trading around GameStop and AMC on Wednesday, citing unprecedented trading activity.

The move has infuriated members of the WallStreetBets subreddit. A top post on the subreddit this morning calls the decision “market manipulation,” with angry comments calling for users to “dump robinhood for good” and lamenting the ensuring fall in stock prices that shortly followed the announcement. The group’s official moderator account has also protested the decision by Robinhood, highlighting the unfairness of the fact that day traders cannot make new investments in the stocks when traditional firms still can.

A sticked post on the thread from moderators also implores users “No witch hunts on Robinhood please.” It’s a reflection on the recent turmoil that has hit the /r/WallStreetBets community as part of its nearly overnight success, which has seen the group’s Discord server banned for “hateful and discriminatory content” and the subreddit itself temporarily made private as the group struggles to moderate the massive influx of new users.