GameStop shares climbed as much as 40% to $44 per share in Thursday trading after Keith Gill, the meme investor kingpin known as “Roaring Kitty,” signaled he would return for his first public live stream in nearly four years. A listing on the “Roaring Kitty” YouTube page said the live stream is scheduled for Friday at 12 pm ET. In a sign of the channel’s popularity, more than 13,000 viewers were already waiting in the video feed’s live chat as of Thursday afternoon. Gill used the platform to detail the reas ...