• Gill's videos and live tweets, in which he often urges investors to examine their finances and profit accordingly, were referenced in his testimony to Congress, where he simply said: "I like stocks."

The influential tweeter returned on Monday and has since posted 12 tweets, all videos, all suggestive memes.

Part of Mr. Gill's testimony was that Gamestop was maintaining the value of its physical stores. According to a website that tracks Gamestop store closings, more than 200 stores have since closed.

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