'The Big Short' investor describes SpaceX in three words

'The Big Short' investor describes SpaceX in three words Faizan Farooque Thu, June 11, 2026 at 11:47 PM GMT+7 4 min read SPCX SpaceX has long been considered one of the surest bets in Elon Musk’s empire. The firm dominates commercial launches, turned Starlink into a huge satellite internet business, and remains a key part of Musk’s long-standing goal of reaching Mars. That’s why a hypothetical SpaceX initial public offering would certainly see high investor interest. But veteran investor Steve Eisman sees a different tale unfolding behind the hoopla. The investor famous for betting against the housing market just before the 2008 financial crisis believes SpaceX’s future may depend more and more on artificial intelligence, and that could make the business considerably more expensive to support than its backers realize. “The valuation’s silly,” Eisman said, arguing that too much optimism may already be reflected in investor expectations. It’s simple to understand why SpaceX is so appealing. The corporation has a solid lead in rocket launches, and Starlink gives it a recurring revenue model that goes far beyond government contracts and one-off missions. That mix has helped make SpaceX one of the world’s most valuable private corporations. But Eisman’s warning is about something else: capital intensity. SpaceX’s capital spending was 42% of sales in fiscal 2023, he said. That number has climbed to 215% of revenue in the most recent first quarter, he claimed. A corporation that is spending extensively to enhance launch capacity for Starlink may nevertheless be characterized as an aerospace and communications enterprise. A corporation that’s making big investments in AI infrastructure looks completely different. Related: Elon Musk, Tesla face serious new threat Artificial intelligence involves huge upfront investment in computing capacity, data centers, processors and electricity. That has already transformed how major tech businesses are seen by investors. Now Eisman says SpaceX may be joining the same discussion. Eisman is not writing off the rocket business at SpaceX. He noted the company's prowess in launches and Starlink. But he added the company’s own growth forecasts seem to be disproportionately related to artificial intelligence potential. That matters because investors are more cautious about AI spending. Many companies are pouring billions into infrastructure, but the business models remain uncertain. Eisman said large language models are increasingly hard to differentiate, raising questions about whether companies can build lasting moats. TheStreet aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. Sponsored: Interested in IPOs? Start your trading journey at Robinhood That makes SpaceX's IPO more complicated, he said. Investors might think they are buying the dominating private space company. They may be buying a company whose future price will depend substantially on AI economics, Eisman says. Elon Musk’s Terafab bet: what it means for Tesla investors Bank of America revamps Tesla stock price UBS has a message for Tesla stock investors Satellite internet and rocket launches have more defined markets. The AI infrastructure race is a considerably more expensive race and the victors are not yet selected. Musk’s track record remains intact, the strongest argument for SpaceX. Many investors have lost money betting against Musk over the years and SpaceX has frequently done what rivals couldn't. But Eisman isn’t betting against SpaceX. He says he doesn’t want to play the IPO at a value that already prices in too much future success. That is the actual warning to regular investors. A SpaceX IPO would test not just investor appetite for Musk, rockets or Starlink. It would be a test of whether public markets are still prepared to pay premium pricing for companies associated with AI, even while worries linger regarding spending, profitability and competitive advantage. SpaceX remains a leader in commercial rocket launches. Starlink gives the company a major recurring revenue business. Eisman says SpaceX’s capital spending has surged relative to revenue. His concern is that AI may be driving more of the company’s future valuation. A SpaceX IPO could become a major test of investor appetite for AI-linked growth stories. For much of the AI boom, investors rewarded companies for thinking and spending aggressively. Now they’re asking tougher questions regarding returns. And if that discussion grows more intense, its IPO might be evaluated on more than just launch dominance when SpaceX goes public. It can also be judged on whether Musk can prove that SpaceX’s AI aspirations justify the huge price tag. Related: Elon Musk's SpaceX is coming for your 401(k) This story was originally published by TheStreet on Jun 11, 2026, where it first appeared in the Investing section. Add TheStreet as a Preferred Source by

'The Big Short' investor describes SpaceX in three words

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