On Monday Eastern Time, Keith Gill, who led retail investors in a battle against Wall Street, posted a picture on social media, which was also his first tweet in three years. This has sparked speculation about its imminent return and sparked a trading frenzy in the market. Gaming Station (GME) saw its morning gains expand to nearly 119%, with trading suspended at least four times due to excessive volatility within the day. Afterwards, it narrowed some of its gains and closed up 74.4%. Data shows that short sellers of the stock have lost a total of $1 billion due to Monday's intraday surge. In addition, the stock price of AMC cinema chains favored by retail investors also surged 78.4% on Monday.