Elon Musk, co-founder and chief government officer of Tesla Inc., speaks throughout an unveiling occasion for the Tesla Model Y crossover electrical car in Hawthorne, California, U.S., on Friday, March 15, 2019.Patrick T. Fallon | Bloomberg | Getty Pictures(This story is for CNBC PRO subscribers solely.)Tesla shares have dropped almost 30% within the final week as numerous components strain the stock, together with Baillie Gifford, the corporate’s largest outdoors shareholder, chopping its stake, in addition to S&P Dow Jones Indices deciding to not add Tesla to the S&P 500.On Tuesday, amid the stock’s greater than 20% decline, Baillie Gifford’s Tom Slater reiterated that the agency believes within the long-term imaginative and prescient of Tesla, noting that the discount within the stake was merely due to portfolio restrictions.