Short sellers have reduced bets against SpaceX as the stock rebounded from its post-earnings slide and the tradable float expanded following a major lockup expiration. Short interest fell to about 11% of publicly traded shares on Wednesday from a peak of 34% last week, according to S3 Partners, after more than 911 million shares became eligible for trading. Shares rose 8% to around $144, about 7% above the $135 IPO price and roughly 38% above the Aug. 3 low. Another 319 million shares could unlock on Aug. 20, followed by roughly 700 million in September and close to that amount in October, leaving investors focused on whether the larger supply will pressure the stock or enable new short positions.