Among the stock activity stories for Friday, Oct. 5, from AP Business News:
— Shares of Glu Mobile Inc. sold off after Zynga Inc., another online games developer, slashed its guidance. But one analyst says Glu should benefit from Zynga's problem: Gamers' shift from computers to phones.
— Shares of The Medicines Co. fell after the company said it was ending development of a drug designed to reduce bleeding during surgery because of safety concerns.
