Why Wall Street is betting billions that Elon Musk’s SpaceX shares will keep tumblingSpaceX’s stock has lost half its value in the past month and made the rocket maker the most shorted large public company in America.SpaceX is facing significant questions about its long-term profitability. But experts say that isn’t the main reason for its massive short position in the company's stock. Jeenah Moon / Reuters fileJuly 31, 2026, 9:02 AM EDTInvestors have placed massive bets that SpaceX stock will keep falling amid a multiweek decline following a blockbuster debut. Just a moment.We are getting your experience ready.