Shares of GameStop shot up 400 percent last week, egged on by the Reddit forum r/WallStreetBets. The online community rallied to drive up the stock price and put the squeeze on big hedge funds who had bet against the struggling video game retailer. Reddit chief executive Steve Huffman — who calls r/WallStreetBets one of his “guilty pleasures” — described this as “the online stock-betting equivalent of, like, jumping off a cliff into a river.” ?

Whether you are in the stock market or not, you have probably heard in the last 24 hours about GameStop. Shares of the struggling video game store became the target of millions of non-professional retail investors on a Reddit forum. Shares of the company have soared nearly 800% over the past week, driven by anonymous posts on the Reddit forum, WallStreetBets.