NEW YORK – When Elon Musk went into sales pitch mode ahead of the SpaceX IPO, the comparison he marshaled to justify valuing the company in the trillions of dollars, and tapping investors for tens of billions, raised a few eyebrows.
“We’re kind of like the Union Pacific,” he said in an interview in an investor presentation ahead of the initial public offering, citing one of his frequent touchstones – a historic infrastructure project in the 1800s intended to connect western states by rail for the first time. “People thought they were crazy” when they built it, he said, “but now California is the biggest state in the country.”
The pitch from one of the world’s most successful and divisive entrepreneurs was typical Musk. The world’s richest person and first trillionaire linked SpaceX, with its plans for orbital data centres and a colony on Mars, to a name evoking an essential part of America’s growth into a superpower – a prize easily justifying the investment that lifted the company’s market value above US$2.5 trillion in a handful of trading days.
The IPO wasn’t the end of the fundraising campaign, it was the start. SpaceX is already turning to the bond market and is preparing to seek at least US$20 billion in its first deal. Capital expenditure could surpass US$700 billion a year by 2031 in one estimate. Is that too much to ask when the goal is, as Musk put it, making “Star Trek real”?
Ask the backers of the Union Pacific. Construction of the railroad flamed out and stopped in Utah – not California. That project was propped up by government support as it minted generational wealth for insiders before ultimately failing.
It’s a tall order to build out SpaceX’s artificial intelligence ambitions, particularly as the company isn’t profitable.
Research analysts at Goldman Sachs Group and Evercore ISI are modelling for the company to spend more than US$1 trillion by the end of the decade. The bulk of that spending will focus on SpaceX’s AI operations and centre on the vision of getting data centres into space.
In meetings with prospective investors, the company’s finance chief Bret Johnsen and president Gwynne Shotwell said they expect the IPO was the last time SpaceX would sell stock, according to people familiar with the matter. Instead of raising billions by diluting shareholders – as well as Musk himself – the plan is to tap debt markets after it touted investment-grade ratings throughout the IPO process, some of the people said.
On June 118, the three major ratings firms gave the company investment-grade bond scores.
Oppenheimer & Co. analysts are modelling for the company to tack on more than US$400 billion in net debt by 2031, up from about US$13 billion as of a few months ago. That’s vastly more than almost every US company currently has on its books and would more than triple what Oracle has.
The analysts expect debt to be the primary source of funding for the company supplemented by roughly US$40 billion of additional equity, they wrote in a June 18 note.
But debt market participants have their doubts.
“The vast majority of the capex is going to have to be financed with equity capital rather than in our market,” said Jim Fitzpatrick, head of US investment grade research at Allspring. “They just aren’t going to have the capacity for issuing a lot of additional debt while keeping investment grade ratings, especially since this company has no track record with the rating agencies.”
SpaceX is set to tap investors for cash potentially just as Anthropic and OpenAI seek to raise tens of billions of dollars in IPOs of their own as soon as 2026. Meanwhile, AI-focused members of the Magnificent Seven companies including Alphabet are tapping further billions.
“It’s a simultaneous buildout of data centres and semiconductors, energy infrastructure and satellite networks,” said Justin Reed, chief investment officer at Brown Brothers Harriman. “We’re moving from this world of funding applications which was capital light and now, frankly, we’re funding an entire economic ecosystem, and to us that’s why the capital requirements look so extraordinary.”
By McKinsey & Co.’s count, the cost to build out data centres here on Earth will require US$7 trillion by the end of the decade. SpaceX’s orbital ambitions would likely add to that figure, potentially testing both the equity and debt markets. Some estimate that with SpaceX’s lofty multiple, equity would be easier.
“With SpaceX, if you’re going to buy into the hype of the momentum regardless of valuation, at least if you’re buying the equity, there’s material upside,” said Joe Hegener, chief investment officer, Asterozoa Capital. “But in debt markets, your upside is capped at the coupon and your downside is everything.”
Bankers are optimistic that the market can continue to fund plenty of spending – particularly as it relates to building out data centres and so-called hyperscalers providing the computing power behind AI’s rapid growth.
The pickup in financing has led to a jump in activity across products. US IPOs and share selldowns have seen US$163 billion so far in 2026 – even when removing SpaceX’s IPO – which is up 28 per cent from 2025, data compiled by Bloomberg show. Debt issuance tied to AI has topped US$300 billion since November across multiple credit markets, driving near-record issuance this year, according to strategists at JPMorgan.
To Jim Chanos, the veteran short-seller and president and founder of Chanos & Co., SpaceX along with the Magnificent Seven and Anthropic and OpenAI promise a monumental amount of spending that the market won’t see a return on – or even feel confident in the prospect of one – for years.
“It’s five to ten years away or longer, so we’ll have this massive, massive capital spend without a lot of stuff to show for it with the exception of the people selling these picks and shovels,” he said in an interview, referring to suppliers that can profit from a gold rush without actually mining themselves.
“People are counting on really transformative changes not only in the way we live our lives but also hyper productivity growth and GDP growth, I’m just not so sure,” he said. BLOOMBERG
