Several big hedge funds were short on gamestop, some guys on Wallstreetbets saw it and bought stocks and thanks to the increasing price hedge funds suddenly saw their shorts no longer covered and losing some money then that spiraled and now several hedgefunds like Citadel lost 3.5bn$ and Citron lost 2.4bn$, WSB guys basically fucked them and it's pretty hilarious. Some of the CEOs of those companies tried to "call out" the disruptive traders.