GameStop shares climb as much as 18% in pre-market as frenzy continues into February

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The WallStreetBets forum on the Reddit Inc. website on a laptop computer and the GameStop logo on a smartphone arranged in Hastings-On-Hudson, New York, U.S., on Friday, Jan. 29, 2021.

Tiffany Hagler-Geard | Bloomberg | Getty Images

GameStop shares were volatile in pre-market trading on Monday as the Reddit-fueled frenetic trading continues.

Shares of the bricks-and-mortar video game retailer jumped as much as 18% to $384.89 in premarket trading. The shares were last up about 2% to $333. The stock surged 1,625% in January.

The astronomical rally has inflicted a mark-to-market loss of almost $20 billion to hedge funds with short positions against the stock, according to data from S3 Partners. However, many short-sellers are holding onto their bearish positions.

Robinhood and other trading apps continue to limit buying of GameStop stocks and options contracts, along with those of other heavily-shorted names, following a week of hugely volatile trading due to a retail trading frenzy led by 5 million-strong Reddit thread “WallStreetBets.”

Limitations are also in place for AMC Entertainment, BlackBerry, Koss, Express, Nokia, Genius Brands International and Naked Brand Group.

Short selling is a strategy in which investors borrow shares of a stock at a certain price on expectations that the market value will fall below that level when it’s time to pay for the borrowed shares.

— CNBC’s Yun Li contributed to this report.