Wall Street is betting against Tesla Motors – TSLA short interest is at its highest in 21 months

According to Nasdaq’s latest short interest update, the total short position on Tesla’s stock increased to 27,367,931 shares – its highest since March 2014. The short position is almost as important as Tesla CEO Elon Musk’s own stake in the company: 28,371,342 shares or about 29% of the float.