(Reuters) - Shares of GameStop jumped 40% in pre-market trading on Monday after social media persona "Roaring Kitty," whose online posts had sparked a trading frenzy in the videogame retailer in 2021, returned on X.com after three years.Keith Gill, known as "Roaring Kitty" on YouTube and "DeepF***ingValue" on Reddit, was a key figure in the so-called meme stock rally, which saw shares of GameStop surge 400% in the final week of January 2021 before crashing back to pre-surge levels in the subsequent week.Gill on Sunday posted a sketch of a man leaning forward in a chair, a popular meme among gamers that indicates things are getting serious. It is his first post on X, earlier Twitter, after being notably absent on social media platforms since mid-2021.GameStop was trending on investor-focused social media stocktwits.com on Monday, indicating interest from individual investors, while Roaring Kitty and retail trading platform Robinhood were trending on X.com.Shares of struggling videogame retailer GameStop have surged over 57% so far in May, but still remain far from the peak of 2021."There's been a few attempts where investors have tried to justify that it's the return of meme stocks, but we haven't quite seen that materialized," said Daniela Hathorn, senior market analyst at Capital.com.Keith Gill, known as Roaring Kitty, in a YouTube video. (Photo Illustration by Pavlo Gonchar/SOPA Images/LightRocket via Getty Images) (SOPA Images via Getty Images)The meme stock rally in 2021 was set off by Gill's posts on Reddit's Wallstreetbets discussion group about the gains he had made on his investments in the highly shorted firm that drove a surge of interest in GameStop.The rally spread to highly shorted stocks including AMC as Reddit users banded together to squeeze hedge funds who had bet against GameStop and other firms.Gill was ordered to testify before the U.S. Congress alongside U.S. hedge fund managers in an examination of the trading frenzy.AMC has tanked more than 95% since the end of 2021.(Reporting by Medha Singh in Bengaluru; additional reporting by Pranav Kashyap; Editing by Shinjini Ganguli)

Social media platform Reddit‘s shares ended their first day of trading in New York up 48%, signaling that investor appetite for initial public offerings of promising yet loss-making companies could be returning.Reddit, which has not turned an annual profit since launching in 2005, lured investors by positioning its content as training grounds for artificial intelligence (AI) programs. Reuters reported last month that Reddit struck a data licensing deal with Google worth about $60 million a year.While Reddit still relies on advertising for the vast majority of its revenue, it touted AI in its IPO marketing roadshow as an area of growth. It also disclosed last week that the U.S. Federal Trade Commission is looking into its AI data licensing deals.“At the core we are a growth company. Achieving our mission means that we want to grow users and community,” said Jen Wong, Chief Operations Officer at Reddit.Shares of the San Francisco-based company opened at $47 on the New York Stock Exchange on Thursday after pricing at $34 in the IPO, the top of the company’s indicated price range. They ended trading at $50.44.The IPO valued Reddit at $6.4 billion, and the company and its selling shareholders raised $748 million

ELK CITY, Idaho--(BUSINESS WIRE)--Therapeutic Solutions International, Inc. (TSOI), announced the filing of a Civil Action in the Superior Court of the State of California for the County of San Diego to disclose the identities of certain individuals or entities that continuously post defamatory and libelous statements on StockTwits. The lawsuit filed today by our attorneys is seeking the identities of certain posters in their DOE capacities to learn their true identities, enjoin further defamatory interest communications and recover for the significant injuries TSOI has suffered. Stocktwits.com, InvestorsHub.com Inc., and yahoo.com are websites that provide users the opportunity, through access to their message boards, to communicate with others concerning stock trading, corporate behavior, and other finance-related issues. The websites undoubtedly serve a useful purpose. But the message boards, which allow their users to express themselves anonymously, by using “screen names” and/or “usernames” traceable only through the hosts of the sites or their internet service providers (ISP), are an opportunity for fraud, trade libel, defamation, misinformation, and stock market manipulators