Reuters Shares of videogame retailer GameStop surged nearly 75 on Monday after Roaring Kitty, an account associated with a social media finance influencer credited with sparking the 2021 meme stock rally, returned to X.com after a threeyear hiatus from the app.

GameStop39;s shares hit an 18month high at 38.20 and were halted multiple times for volatility. They posted their sharpest oneday percentage gain since January 2021.

The Grapevine, Texasbased firm39;s rally also boosted other meme stocks that have been hammered over the past year. Theater chain AMC jumped 78, while headphones maker Koss Corp soared 37. Hertz Global rose nearly 12, while Reddit Inc rose nearly 9.

Keith Gill, known as Roaring Kitty on YouTube and DeepFingValue on Reddit, was a key figure in the socalled Reddit rally, which saw shares of GameStop surge as much as 21fold over two weeks in January 2021 before crashing to presurge levels in the subsequent days.

The Roaring Kitty account on Sunday posted a sketch of a man leaning forward in a chair, a popular meme among gamers that indicates things are getting serious.

On Monday, the account posted clips from movies including an installment of The Avengers, the 1993 Western Tombstone, and the 1980s comedy Ferris Bueller39;s Day Off.

None of the posts mentioned GameStop.

The cryptic posts were the first Roaring Kitty posts on X, previously known as Twitter, in years. The social media accounts associated with Gill have been quiet since mid2021.

Gill…