GameStop bucks market sell-off with 19% surge as Reddit chatter picks up

Robert Galbraith/Reuters

• Shares of GameStop surged 19% on Thursday, bucking the broader market slump.
• Reddit chatter seemed to have picked up around 2 PM ET. 
• At around the same time, Ryan Cohen tweeted a photo, which users interpreted the post as a positive outlook for GameStop.
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Shares of GameStop surged 19% on Thursday, bucking a broader market slump amid a massive sell-off...