Rivian is set to open 13% lower at $35.93 on Friday, an all-time low for the stock, marking a dizzying fall from grace for a company that celebrated last year's biggest IPO at a price of $78 a share. Its entire market cap could now dwindle to just $30 billion with only a few weeks left before the books are closed on the first quarter, setting Amazon up for a potential impairment charge of $10 billion.