Are Lyft’s days as an independent public company numbered? Shares of the No. 2 U.S. ride-hailing firm jumped 17% today on social media chatter that General Motors might be contemplating what would be its second run at the firm. GM declined to comment, understandably, but the idea isn’t crazy. In fact, my colleague Amir Efrati, who knows this sector about as well as any reporter, argues that Lyft is a logical acquisition target for any of the four major companies developing self-driving taxis in the U.S.: Amazon (owner of Zoox), Alphabet’s Waymo, Argo (owned by Ford and Volkswagen) and GM, owner of Cruise.