SpaceX (SPCX) stock stumbled to a new all-time low ahead of a major mission test tonight, just as it gambles that Starship can take over for the company's lucrative Falcon launch business. SpaceX stock slid 2.7% on Friday, hitting a new closing low of $115.07 and finishing down 7.2% for the week. Tonight's launch will primarily test the booster's ability to execute a successful launch, stage separation, and return to an offshore landing point in the Gulf of Mexico. A successful test would be a catalyst for the stock. It would be the first Starship launch since the company's June 12 IPO.