Stocks of electrical car startups Rivian Car Inc. and Lucid Crew Inc. are staring down all-time lows Thursday after Ford Motor Co. slashed costs on its electrical pickup truck.The industrywide price cutting war on electrical vehicles is a big worry for buyers, because it weighs on margins. For unprofitable startups, like Rivian and Lucid, it threatens to additional lengthen the timeline for when they are going to begin to generate profits.