Investing.com -- Elon Musk has never been one to shy away from a battle with short sellers, and the stage is now set for a historic showdown over SpaceX (NASDAQ: SPCX). With SpaceX slated to report its highly anticipated quarterly results tonight, August 4, after the closing bell, Wall Street is bracing for massive volatility. This means that if SpaceX reports positive news tonight, the resulting scramble by short sellers to buy back shares and cover their positions could send the stock soaring. Despite the immense risks of betting against a Musk-led enterprise, short sellers have steadily added to their positions as the stock has trended downward from its post-IPO highs. On one side, highly convicted short sellers have tied up 95% of the borrowable float, betting that SpaceX's first public earnings will disappoint.