SpaceX IPO: AI Rotation or Market Crash?

SpaceX completed the largest IPO in U.S. history, raising $75 billion at a $1.75 trillion valuation. Shortly after, Anthropic confidentially filed for an IPO targeting $30 billion, and OpenAI is expected to follow next year. These events have sparked fears of a potential 40% market crash, based on a study by economists Xavier Gabaix and Ralph Koijen. Their research suggests that every dollar withdrawn from U.S. equities causes the total market cap to shrink by $5. Applying this multiplier to the roughly $200 billion these three IPOs are expected to raise implies a $1 trillion hit to market value.

However, economist Ed Yardeni counters that the U.S. equity market is large enough to absorb these offerings. With money market funds holding $8 trillion and the total market cap exceeding $50 trillion, the combined raise represents only 0.4% of investable capital. Yardeni concludes the effect is 'manageable.'

The real risk is not a systemic crash but a rotation of capital. Fund managers selling existing positions to fund new IPO allocations, particularly within the AI and tech sectors, could create selling pressure on specific stocks. This was already observed in the week before SpaceX priced its IPO, when the Nasdaq dropped 4.18% on June 5, driven partly by hedge funds selling AI infrastructure stocks to make room for SpaceX.

If Anthropic and OpenAI follow, the same mechanism could repeat. Additionally, the Nasdaq-100 may add these IPOs within 15 days of listing, forcing passive funds to buy shares. This would displace existing overweighted constituents like Nvidia, Microsoft, and Apple.

While a 40% crash is unlikely, the rotation pressure is real. The question is not whether the capital exists, but which assets will be sold to fund these new investments.

For investors, the key takeaway is that the IPO of SpaceX and potential IPOs of Anthropic and OpenAI are not just exciting new listings—they represent a significant shift in capital flows. The mechanism behind the potential market impact is not a broad withdrawal of funds, but a rotation out of existing AI and tech holdings into these new names. This is particularly relevant for holders of Nvidia, AMD, and other AI infrastructure stocks.

The article notes that this rotation already caused a notable drop in the Nasdaq in June. If similar dynamics play out for Anthropic and OpenAI, we could see repeated selling pressure on these high-flying AI stocks. This is compounded by index additions: if SpaceX enters the Nasdaq-100, passive funds must buy it, but that buying comes at the expense of existing components, likely the most overweighted names like Nvidia, Microsoft, Apple, and Meta.

A 40% crash scenario is improbable because the market is large enough to absorb the new supply, and the valuation conditions that preceded past crashes (dot-com, financial crisis) are not present today. However, the rotation is a real, short-term risk for anyone heavily invested in AI infrastructure. The article suggests that this selling is mechanical and temporary—it's not a reflection of the underlying business quality.

Long-term investors should consider their time horizon. If you can withstand a potential 10-15% drawdown in these names due to IPO rotation, the fundamentals of AI compute remain strong. The companies generating massive profits from AI are not going away. The key is to know what you own and decide on your tolerance for volatility before the selling starts.