Needham analyst warns Tesla's value is really 'closer to $200' per share, about 30% lower from here By: CNBC.com News August 20, 2018 at 11:11 AM EDT Tesla stock has tumbled in the wake of CEO Elon Musk's Aug. 7 tweet, floating a go-private deal. Read More >> Related Stocks: JPMorgan Chase & Co Tesla, Inc.