The capital for upcoming mega-IPOs from companies like SpaceX, OpenAI, and Anthropic will not come from the sidelines. It will be reallocated from existing public tech companies, causing their price-to-earnings multiples to shrink as investors realize the new AI-native companies will erode their moats and capture future value.

Despite high market valuations, the current environment is a massive IPO drought, comparable to the 1930s or 1970s. Historically, equity market bubbles are defined by a huge wave of IPOs and secondary offerings. The absence of this issuance is a strong counterargument to bubble claims.

A few massive, highly anticipated IPOs like SpaceX are expected to absorb tens of billions in investor capital. This concentration of demand creates a difficult environment for smaller tech companies, as mutual funds and other large investors have a finite capacity for new stocks, crowding out other contenders.

The upcoming IPOs of Anthropic and OpenAI are so large they may force a market-wide liquidity shift. To fund these purchases, investors may need to sell existing index holdings and rotate capital out of sectors like materials and industrials, impacting the broader market.

By offering only a small fraction of its shares ($75B out of a trillion-dollar valuation), SpaceX is creating a supply-demand imbalance. This classic IPO strategy forces index funds and institutional investors to buy into a potential price bubble, risking significant losses when more shares eventually hit the market.

The massive wave of pending tech IPOs resembles a Thanksgiving dinner where investors' 'appetite' for risk is limited. Companies like SpaceX that go public first will benefit most. Subsequent companies face increasing risk as investor capital gets allocated and market capacity to absorb trillions in new equity runs out.

For trillion-dollar private companies like SpaceX going public, the traditional 90-180 day lockup period is inadequate. The massive volume of insider shares hitting the market at once could crash the stock. Investment bankers are now designing staggered lockup releases to manage this unprecedented liquidity event.

Companies like SpaceX and OpenAI command massive private valuations partly because access to their shares is scarce. An IPO removes this barrier, making the stock universally available. This loss of scarcity value can lead to a valuation decline, a pattern seen in other assets like crypto when they became easily accessible via ETFs.

With multiple giants like OpenAI, Anthropic, and SpaceX eyeing public offerings, there's a real concern that the market cannot absorb them all simultaneously. This creates a bottleneck, forcing companies to carefully time their IPOs to avoid cannibalizing investor demand and potentially devaluing their listings.