An investment firm warns the S&P 500 faces a 30% drop if AI stocks collapse
As seen on the 24/7 Wall St. homepage on October 24, 2026.
A 30% index drawdown is the price of today's AI concentration, and that math lands on every passive index holder, not just the chipmakers.
JUST IN: Investment firm says S&P 500 could plunge 30% if AI stocks "go bust"
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A single unnamed investment firm has put a number on the risk that most passive investors quietly carry: a 30% drawdown in the S&P 500 if the AI trade unravels. That formal warning from an institutional shop was posted on October 24, 2026.
The concern is concentration. AI-linked stocks have grown to represent an outsized share of the index's total weight, which means a collapse in that cohort does not stay contained to technology portfolios. It flows through every passive vehicle that tracks the broad market.
A 30% index drawdown is the price of today's AI concentration, and that math lands on every passive index holder. Investors who assume diversification protects them simply by owning the index are underestimating how much of that index is now a single directional bet.
The firm behind the warning is not identified in the available details, but the figure itself is what matters for risk-sizing. Anyone holding broad U.S. equity exposure without accounting for AI concentration has a gap in their downside scenario planning that a 30% headline number makes hard to ignore.