SpaceX's First Post-IPO Starship Launch Aborted, After-Hours Stock Price Drops Over 4%
N.R. Finch
SpaceX attempted to refly its upgraded Starship rocket on July 17 but an engine failure triggered an automatic abort — shares dropped over 4% after hours, extending a slide that has wiped out the IPO premium in just one month.
What happened on the launch pad?
Several Starship engines failed to ignite during startup, triggering an automatic abort. The rocket never left the pad.
This was the planned return-to-flight after the V3 variant's May debut — and SpaceX's first launch attempt since its June 12 IPO, making the timing especially sensitive.
Musk posted on X: propellant is being offloaded, and he hopes to try again within days.
Why did the stock react so sharply?
SpaceX closed Thursday below its $135 IPO price — breaking its offering price barely a month after listing.
Before the abort, the stock had already shed roughly $903 billion in market cap from its post-IPO high, falling in 8 of the past 9 sessions.
This means → the abort was not the starting point of the decline — it was the final blow to confidence that was already cracking.
How much did the IPO raise, and where does valuation stand?
SpaceX raised over $85 billion, billing it as the largest IPO in history.
At its peak the company's market cap briefly rivaled Amazon and Microsoft, but it has retreated steadily since.
In plain terms = the capital raise succeeded, but the market quickly concluded that the valuation was too rich and expectations too full for the stock to hold.
Is this just a SpaceX problem — or is the whole IPO market cooling?
Through July 15, the weighted average return for 2026 U.S. IPOs was roughly 6%, trailing the S&P 500's 11% gain over the same period.
The main drag: broad pullbacks in two hot sectors — AI infrastructure and aerospace & defense.
Eddie Molloy, Morgan Stanley's co-head of global equity capital markets, noted: "AI built enormous momentum that powered strong early trading, but that tailwind is fading as the market environment shifts."
What comes next?
Michael Ventura, RBC's co-head of U.S. equity capital markets, expects near-term IPO activity to run below prior expectations.
For SpaceX, the next Starship launch is now the key test of whether fundamentals can support the valuation.
This reflects a broader reality: once the IPO wave recedes, tech companies must convince the market with execution, not narrative.
Content is for reference only, not financial advice.