Posted in Web Tesla shares plunge a record 21% after more than doubling … April 20, 2020 REUTERS/Jason Lee/File Photo. Shares of Tesla tumbled as much as 21% on Wednesday.; The automaker’s stock had seen a sudden rise in 2020, with shares more than doubling in value in just over a month. https://markets.businessinsider.com/news/stocks/tesla-stock-price-sinks-after-rally-doubling-growth-china-coronavirus-2020-2-1028877695