Rivian said it has closed a major deal with Volkswagen that could be worth $5.8 billion by 2028.Shares of Rivian Automotive (RIVN 17.86%) were still surging on Wednesday afternoon, after the company announced the closing of a deal with Volkswagen that could be worth well over $5 billion to the electric vehicle (EV) maker.As of 1:30 p.m. ET, Rivian's shares were up about 18.3% from Tuesday's closing price.A deal that should greatly ease Rivian investors' mindsUnder the deal, first outlined in June, Rivian an ...