GameStop Value Surges Past $10 Billion as Shares Nearly Double Bloomberg 1/27/2021 Bailey Lipschultz (Bloomberg) -- The skyward march in GameStop Corp. accelerated Tuesday, its stock nearly doubling during exchange hours and then surging another 50% after being name checked in a tweet by Elon Musk. Its market value flew past the $10 billion mark via a year-to-date rally that is pushing 700%. Thanks to the gain, GameStop is now worth more than 10% of S&P 500 stocks including American Airlines Group Inc., Under Armour Inc. and Invesco Ltd. It started the year with a market capitalization of $1.2 billion. Shares of the U.S. company listed on German exchange Tradegate gained 106% to $306 in early trading on Wednesday compared with Tuesday’s U.S. closing price of $147.98.