GameStop, AMC share prices up over 70% following return of investor Roaring Kitty to X

Roaring Kitty, investor and influencer central to 2021’s GameStop (GME) short-squeeze, returned to X on Monday to post a single textless meme of a gamer leaning forward in his chair, as if indicating “game on”.

The stock rose over 100% and was halted several times throughout the day as bullish traders rallied.