The SpaceX IPO is finally happening and the hype is exactly as loud as you’d expect.
At a $1.78 trillion valuation, it’s the largest public listing in history, from a company that routinely lands rockets on ships and blankets the sky with internet satellites.
It’s a huge milestone that begs an even bigger question for everyday investors looking to buy in on day one to avoid missing out.
But if you already own a standard index fund, chances are you’re going to own a piece of SpaceX anyway!
The mechanics of a mega-IPO
People often misunderstand what happens immediately after a giant company starts trading.
Once a stock goes public and hits specific size thresholds, the major index providers consider adding it to their index. Index funds tracking those benchmarks must then buy the stock.
This all happens fast – and the timeline has got even shorter. In anticipation of the SpaceX listing, some major index providers have tweaked their rulebooks to fast-track ‘mega-IPOs’ into their systems.
Because of this, the inclusion timeline for SpaceX would look roughly like this:
• FTSE Russell indices: Added within about 5 trading days (thanks to newly approved entry rules).
• MSCI indices: About 10 trading days.
• NASDAQ (including the Nasdaq 100): About 15 trading days (slashed from a historic seasoning period of three to 12 months).
• S&P 500: At least 12 months. Unlike the others, the S&P explicitly rejected recent proposals to bend its rules for mega-IPOs. They are holding firm on their 12-month waiting period and strict GAAP profitability requirement.
If you hold a global tracker, a technology sector index fund or a broad US equity fund, SpaceX is probably going to show up in your portfolio automatically in a matter of weeks. You don’t have to lift a finger.
Keep the impact in perspective
Index funds don’t just buy up shares based on a company’s total market cap. They use free-float weighting, meaning they only care about the shares actively trading on the open market.
Current estimates suggest SpaceX’s freely tradable IPO shares will hover around $70 billion. That sounds massive, but it’s only about 4% of the company’s total $1.75 trillion valuation. The rest remains locked up with Elon Musk, early staff and big institutional backers.
Because of this, analysts expect SpaceX to make up roughly 0.7% of the Nasdaq 100. Even as one of the most valuable companies on the planet, its initial footprint in your portfolio would be minimal.
It’s a drop in the ocean – and that’s by design. The system prevents a single dominant company from ruining the diversification you pay for.
Don’t let the headlines change your strategy
At Prosper, we rely on decades of hard data that all point to the same conclusion: broadly diversified, low-cost index funds are the most reliable way to build wealth over the long term.
This isn’t just our opinion. Year after year, reports like the Morningstar Active/Passive Barometer and S&P’s SPIVA studies show passive benchmarks consistently beating active managers. The SpaceX IPO – with its valuation, rockets and headlines – doesn’t get to change the maths or rewrite the rules of investing.
The investors who win over a 30-year horizon aren’t the ones who perfectly timed a hot IPO, but the ones who bought the whole market, kept their fees low and cancelled out the noise.
If you feel compelled to buy SpaceX directly at the IPO, go in with your eyes open. You’d be paying a heavy premium for a day-one access, buying into a stock where 96% of the equity isn’t even on the market.
You’d also be taking on massive concentration risk in a business highly dependent on government contracts and one very unpredictable CEO.
SpaceX is a remarkable company. As an investment, however, let the index buy it for you – at the right weight, in due time. That’s how the system works.
This article is for informational purposes only and does not constitute personal financial advice. If you are unsure whether an investment is right for you, please seek financial advice.
Third-party data referenced (including Morningstar and SPIVA) is sourced from publicly available reports. Any references to the SpaceX IPO, its valuation or index inclusion timelines are based on publicly available information and analyst estimates. Capital at risk. The value of your investments can go down as well as up and you may get back less than you invest.