Keith Gill announced his return Sunday on X which caused GameStop's stock to jump 50% the next day. Here's what to know about investor Roaring Kitty.

Roaring Kitty is back. Keith Gill, whose bullish analysis of the video-game retailer GameStop on Reddit during the pandemic created a national phenomenon, made his first social media post on the X service in three years, in a cryptic post meant to show he was paying attention.

Retail investor darlings GameStop and AMC soared on Tuesday, as posts from "Roaring Kitty" Keith Gill raised chatter about the return of the central figure behind the 2021 meme stock frenzy.

GameStop is a meme stock. Meme stocks are stocks that gain popularity through hype on social media. Small, individual investors often start buying a company’s stock after being influenced by investment advisers on social media.

Keith Gill, known as Roaring Kitty, made his return to social media Sunday, sparking a meme-stock rally that sent shares of GameStop skyrocketing.