SpaceX and Anthropic mega-IPOs could mark end of bull run, Bank of America suggests

Bank of America warned that mega-IPOs like SpaceX and Anthropic could drain liquidity from existing equities and mark a late-stage speculative phase rather than a broad market tailwind. SpaceX may seek a valuation above $2 trillion as soon as June, while Anthropic could be valued above $900 billion after its latest funding round and potentially IPO in October. The firm argues that new share supply could pressure megacap tech and the Magnificent Seven as passive funds rebalance to make room for the listings.

Analysis

The key issue is not whether these IPOs are good businesses, but that their scale creates a mechanical financing event for the whole market. When the investable universe expands abruptly after years of scarcity, passive allocators and benchmarked managers are forced to fund new supply by trimming the highest-weight names first, which means the marginal seller is likely not discretionary but rules-based. That creates an asymmetric headwind for crowded megacap growth exposures even if fundamental earnings remain intact.

The second-order effect is a regime shift in how leadership is financed. A market that has been supported by shrinking public float and buyback absorption now faces the opposite: more shares competing for the same pool of capital, while buyback capacity is already concentrated in the same mega-cap cohort that is being asked to absorb the pressure. In that setup, the weak link is breadth quality—equal-weight can hold up better than cap-weight for a while, but if fund flows slow, the spillover typically shows up first in long-duration software and AI adjacencies, not just the new issues themselves.

The contrarian view is that the IPO pipeline may be less bearish if it arrives with genuine earnings visibility and broadens participation beyond a narrow AI leadership group. If new listings are absorbed into existing passive demand without forcing meaningful de-risking, the market could treat them as fresh index ballast rather than supply shock. The real tell is not debut-day performance; it is whether breadth improves after inclusion or whether high-beta growth underperforms for 4-8 weeks as portfolios rebalance.

Near term, the risk is technical and tactical, not macro. The first 1-2 months post-pricing should show the cleanest pressure if managers pre-position for index inclusion and deal-related hedges are put on, while the bigger multi-quarter risk is sentiment rollover if the market interprets “elite private exits” as late-cycle distribution rather than innovation gains. Any reversal likely requires either a strong digestion period with limited follow-on issuance or a fresh earnings acceleration from the existing megacap leaders that offsets the supply overhang.

Key Decisions for Investors

• Short QQQ vs long RSP for the next 4-8 weeks: express a view that cap-weighted megacap tech will underperform equal-weight as passive funds source capital for IPO demand. Risk/reward improves if breadth weakens while the index stays near highs.
• Reduce overweight in high-duration AI/software beta baskets and rotate into profitable cash-generative tech with lower multiple sensitivity over 1-3 months. Use the IPO calendar as a catalyst window rather than waiting for confirmed underperformance.
• Buy short-dated put spreads on QQQ or SMH into the 2-6 week window ahead of anticipated pricing/inclusion events. The trade is targeting a temporary flow shock, with limited premium outlay and defined downside if absorption is clean.
• Pair long XLF or value/quality baskets against short megacap growth if market breadth deteriorates on issuance headlines. This benefits from a possible factor rotation away from crowded long-duration positioning.
• If the IPOs launch and are absorbed without index weakness for 10-15 trading days, cover tactical shorts and rotate into post-IPO volatility compression trades. In that case the market is signaling supply digestion rather than regime change.