Shares of GameStop tumbled for a second consecutive session on Monday, extending deep losses after stock influencer Keith Gill’s return to YouTube last week failed to spark fresh investor enthusiasm for the struggling shopping mall retailer. Gill, known on YouTube as “Roaring Kitty,” held his first livestream in three years on Friday, the day GameStop unveiled its second share sale in days. A key figure behind an eye-popping rally in GameStop in 2021, Gill joked about memes and interspersed his discussion o ...