Starship Flight 13 is not just another test from Boca Chica. It is the first public-market check on whether SpaceX can turn its hardest rocket program into the business investors already paid for.
The launch window opens today at 6:45 p.m. ET from Starbase, Texas. For the engineers on the pad, this is a rocket test. For the market, it is a test of nerve. SpaceX priced its IPO at $135 a share on June 11, began trading under SPCX on June 12, and raised about $75 billion before any underwriter option, according to the company's own IPO announcement. The stock then ran as high as $225.64 before the mood changed. As of the latest Investing.com market data, SPCX closed at $116.72 on July 22, about 13.5% below its IPO price and nearly 48% below that peak. A clean flight tonight won't repair the whole chart. It would still matter.
The July 16 attempt ended before it left the ground. Reuters reported that the engines ignited for Starship's 13th test flight, then an automated abort shut the system down after four of the Super Heavy booster's 33 engines failed to start. Elon Musk said two engines would be replaced before SpaceX tried again. That is not a disaster. It is also not nothing. Public investors don't watch a scrub the same way private backers watched the first dozen Starship tests.
The 20 Starlink V3 satellites aboard are not a decorative payload. Space.com reported that Flight 13 is meant to deploy the first Starlink Version 3 satellites, while Starlink's own technical page says the V3 design supports 1 Tbps of downlink capacity, roughly ten times the V2 figure, and 160 Gbps of uplink capacity. Those numbers explain why this flight carries more than engineering pride. Starlink generated $11.4 billion of SpaceX's $18.7 billion in 2025 revenue, according to Blockspace's breakdown of SpaceX's filings, and it produced $3.26 billion in revenue in the first quarter of 2026. That is the business inside the rocket.
Starlink is the near-term test
You can admire Starship as hardware and still be clear about the market problem. SpaceX's current valuation assumes Starship becomes a working launch system, not a once-in-a-while spectacle. Falcon 9 can keep the existing Starlink business moving, but V3 is built around Starship's payload capacity. Ars Technica recently noted that Starship could carry 60 larger V3 satellites in a launch, compared with 27 V2 satellites on Falcon 9, producing far more bandwidth per launch. That is the operational case investors bought.
Flight 13 is also tied to the NASA story. AP reported after the July 16 abort that Starship is central to Artemis, with NASA contracting SpaceX and Blue Origin for future lunar landers, including missions aimed at the Moon's south pole as early as 2028. A successful in-space Raptor relight would not make Starship crew-ready. It would check one box SpaceX still needs for orbital maneuvering and later propellant-transfer work. One box counts.
The stock's weakness has other causes, and they arrived quickly. TechCrunch reported in June that SpaceX agreed to acquire Cursor in a $60 billion all-stock deal only days after the IPO. The Financial Times reported this week that short interest has climbed sharply, shares have fallen below the listing price, and hundreds of millions of additional shares could hit the market when restrictions lift in August. That is a lot for a newly public company to carry before its most watched rocket has proved the cadence investors expect.
The market is learning how rockets trade
Frankly, this is the part public shareholders need to understand. SpaceX spent its experimental Starship years outside the public market. Rockets exploded. Boosters missed. Timelines slipped. The company kept iterating without a stock quote flashing next to every failure. Going public didn't change the physics. It changed the audience.
Investors holding SPCX are not really betting on Flight 13 alone. They are betting on repeatability. One successful launch is a data point. A monthly cadence is a business. The commercial model around Starlink upgrades, Artemis work, heavier payloads and whatever SpaceX later builds in orbit only works if Starship flies often enough that customers can plan around it.
Tropical Storm Bertha adds one more variable to today's window along the Texas coast, and the rocket still has to clear the same hard engineering gates that stopped it last week. If the window closes, SpaceX can try again. If the vehicle aborts again, the market will have a harder question to answer: whether it priced SpaceX as a company already operating Starship at scale, when the rocket is still proving it can leave the pad on schedule.
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