EBay Inc. jumped more than 13% in after-hours trading on Friday after the Wall Street Journal reported that video-game retailer GameStop Corp. is preparing a bid for the company.GameStop, led by e-commerce entrepreneur Ryan Cohen, has been building a position in the online auctioneer and plans to make an offer for the business this month. Spokespeople for eBay and GameStop didn’t immediately respond to requests for comment. Shares in GameStop also rose.Cohen, the founder of pets supplies e-tailer Chewy, pla ...