GME stock and AMC shares retreated early Friday as the meme rally appeared set to further pare the week's gains. GameStop tumbled after releasing preliminary Q1 results and announcing plans to sell more stock. Meanwhile, a leading short seller from the 2o21 rally is betting against GME stock again. Elsewhere, Robinhood stock jumped on a major upgrade from BofA.X Robinhood Upgraded Times TwoBofA early Friday double upgraded Robinhood (HOOD) shares to buy from underperform, The Fly reported. Analyst Craig Sie ...