(CNN Business) Amateur investors continued a frenzied runup of GameStop for the fourth session in a row, with the stock ending Tuesday up more than 92%, or about $148 a share. Tesla TSLA After the market closed,CEO Elon Musk appeared to join the pile-on with a tweet that sent GameStop shares briefly above $200. GameStop is up more than 680% so far this year — an improbable spike led by investors congregating on the WallStreetBets subreddit. Those traders have essentially declared war on GameStop's short sellers — investors who have placed bets that a stock would go down. The more GameStop climbs, the more money the short sellers lose.

Source: CNN January 27, 2021 00:11 UTC