GameStop shares fall after climbing as much as 18% in premarket as volatility continues in February

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, but were last down about 7% to $335. 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….