AI tremor exposes market's volatility fault lines
SPY•October’s AI-related market turbulence has raised concerns that volatility-suppression trades could amplify shocks as AI earnings momentum slows. Systematic long-short hedge funds tracked by Goldman Sachs fell 2% last week, while Barclays said dispersion among AI-linked borrowers had nearly tripled to 65 basis points.
1. Market protection weakens
The AI boom has helped shield markets from other economic signals for more than two years, but recent turbulence suggests investors are becoming more selective as growth rates crest and the balance between computing costs and revenue shifts. Government bonds attracted investors seeking protection from the potential economic fallout of an AI slowdown or accident, even as oil prices, rate-hike speculation and debt worries mounted.
2. Volatility risks build
Societe Generale said the three-month correlation between S&P 500 returns and changes in the 10-year Treasury yield reached its most negative reading in 30 years earlier this month, before reversing. The firm also pointed to a breakdown in volatility suppression. The VIX rose in recent weeks but remained below its historic average and about half its level shortly after the Iran war began eight months ago.
3. AI credit diverges
Goldman Sachs monitoring showed systematic long-short hedge funds had their worst week since 2024, declining 2%. Morgan Stanley estimated overall AI investment spending could rise another 50% in 2027, while warning that higher capital costs may affect more selective and highly leveraged parts of the AI network. Barclays said AI-related debt underperformed investment-grade credit indexes by about 35 basis points this year, while dispersion among AI-linked borrowers nearly tripled to 65 basis points; excluding outliers such as Oracle, dispersion rose 60%.
