GameStop, AMC shares jump another 40% in premarket trading as meme stock craze returns

Shares of GameStop and AMC surged around 40% in premarket trading as the meme stock phenomenon reignited, fueled by a new post from "Roaring Kitty," the key figure in the initial craze. Other meme stocks like BlackBerry and Koss also saw significant premarket gains. This resurgence follows massive gains on Monday, with GameStop and AMC soaring 74.4% and 78.4%, respectively.