Uber Is Cozying Up With Rivian. Does This Make Either Stock a Buy?

Shares of Rivian Automotive (NASDAQ: RIVN) jumped about 10% in premarket trading on Thursday following news of a massive cash injection from ride-hailing giant Uber Technologies (NYSE: UBER). The electric-vehicle maker is getting a well-timed financial boost to build out its autonomous fleet. But does this high-profile partnership make the struggling automaker's stock a buy? On the surface, the deal looks like a big win for Rivian -- and it is. The company secures fresh capital and a guaranteed buyer for ...