The product is likely Tesla CEO Elon Musk's latest jab at short sellers of TSLA stock. As of mid-June, more than 15 million shares of TSLA stock were being sold short. At Friday's closing price of $1,208/share, those shares-sold-short would be valued at more than $18B, making Tesla by far the most shorted company by valuation on the Nasdaq stock exchange despite having a much smaller market cap than the runners-up.