The popular stock investment app Robinhood has stopped supporting the purchase of new shares on a handful of stocks supported by the recent Reddit fueled frenzy.

Robinhood messages posted to various company pages like GameStop, AMC, and Nokia, inform users that the stock is not supported on Robinhood, or not available for purchase. Some are allowed to sell.

Robinhood has not issued any guidance on the halt and it’s unclear how long it will last. The halt was first noticed around 8:30 a.m. on Thursday.

Our mission at Robinhood is to democratize finance for all. We’re proud to have created a platform that has helped everyday people, from all backgrounds, shape their financial futures and invest for the long term.

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.

We’re committed to helping our customers navigate this uncertainty. We fundamentally believe that everyone should have access to financial markets. We’re humbled to have helped many people invest in the markets for the first time. And we’re determined to provide new and experienced investors with the tools and resources to help them invest responsibly for their long-term financial futures.

A Reddit group known as WallStreetBets has rallied its members behind several stocks, most notably GameStop, which has increased by nearly 1,000% in the last week.

AMC has increased by 400% in the last week. Since the halt, stocks impacted have dropped in value.

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