Game Back On: GameStop Stock Rebounds As SEC Warns Against Market Manipulation

Shares of video game retailer GameStop shot up, the online broker Robinhood struggled for cash and securities regulators issued a stern warning for anyone trying to game the market.

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The GameStop stock-market roller coaster continued Friday as the video game retailer’s shares shot up, the online broker Robinhood struggled for cash and securities regulators issued a stern warning for anyone trying to game the market.

Catapulted by seemingly unrelenting enthusiasm on Reddit, GameStop stock soared more than 70%.

On Thursday, it had plunged 44%. That happened after Robinhood, an online trading forum, restricted trades on GameStop, AMC Entertainment and other stocks that have been driven up by amateur day traders on Reddit’s r/wallstreetbets community, which now has 6 million members.