Rivian predicted it would turn gross-margin-positive next quarter.Since it went public back in 2021, Rivian Automotive (RIVN -4.17%) has done a good job of selling its electric vehicle (EV) SUVs. What it hasn't done a good job of is being able to sell them for more than it costs to makes them. This is reflected in the company's negative gross margin.Despite some recent component shortages that affected deliveries, the EV company reiterated that it would be able to achieve a modest positive gross margin next ...