Shares of GameStop Corp. Cl A shed 2.20% to $23.60 Monday, on what proved to be an all-around mixed trading session for the stock market, with the S&P 500 Index rising 0.08% to 5,463.54 and the Dow Jones Industrial Average falling 0.

Plug Power (NASDAQ: PLUG) stock tumbled more than 17% in morning trading Friday after the fuel cell and hydrogen fuel production company announced the surprise sale of more than 78.7 million shares of stock in an effort to raise cash to keep itself in business.

Key Takeaways Plug Power said it would offer roughly 79 million shares at a price of $2.54 each, which would generate gross proceeds of $200 million.The price was below Thursday's close, and the company's shares fell Friday.