In doing this, Gill and his followers created what’s known as a “short squeeze” in early 2021, forcing the hedge funds that had shorted the company’s stock to buy up more shares in an attempt to shield themselves from losses — sending the stock “to the moon.” During the squeeze, GameStop’s shares surged more than 1,000% in a matter of weeks. (When traders short-sell a stock, they are betting that the stock will fall by borrowing shares and selling them high, with the belief that they can be repurchased later at a lower price.)