Trading of GameStop has halted multiple times over the last week because the stock price has jumped so quickly it’s triggered market protections. On Monday, the stock surged again, opening at $96 and then jumping to $159 an hour later, its highest-ever price. By the end of the day, it was back in the $70s.
https://www.buzzfeednews.com/article/amberjamieson/gamestop-reddit-stock-shares