Wall Street faces AI-driven sell-off as fears of a 2026 market crash grow
U.S. equities fell sharply on Friday amid concerns over AI spending, higher oil prices and inflation, while prediction markets assign modest odds to an AI-related crash.
Wall Street posted broad losses on Friday, with the Nasdaq Composite down 2.19%, the S&P 500 slipping 1.22% and the Dow Jones Industrial Average falling 0.55%, according to Reuters. The declines pushed the Nasdaq more than 4% lower for the week and marked the S&P 500’s worst weekly performance since January. The Cboe Volatility Index rose nearly 25% to 20.57, its highest level since late July.
Investors cited worries about the sustainability of AI-related investments, rising energy costs and the prospect of persistently high borrowing rates. Shares of AI-focused companies fell sharply; CoreWeave dropped 12% and extended a five-day losing streak to about 25%, while its bonds surged to yields above 15%. Broadcom declined 3.6% and the Philadelphia Semiconductor Index recorded its eighth consecutive session of losses.
Higher oil prices added to inflation concerns, with Brent crude climbing to roughly $109 a barrel amid Middle East tensions and supply-disruption fears. Stronger-than-expected U.S. producer-price data also heightened expectations that the Federal Reserve may keep rates elevated, pressuring growth-stock valuations.
Margin debt in the U.S. stock market hovered around $1.4 trillion after a slight dip from $1.5 trillion in August, remaining 27% higher than a year earlier. Analysts noted that a sustained sell-off could trigger margin calls and force investors to liquidate positions, though high debt levels alone do not guarantee a crash.
Prediction-market platform Polymarket showed limited concern about a systemic crash, assigning a 7% probability to an AI bubble burst by the end of 2026 and 16% by mid-2027. Its contracts for a 50% drop in Nvidia or a 40% decline in the iShares Semiconductor ETF are required to meet specific criteria before a broader market crash would be signaled. An October 19 S&P 500 opening contract indicated a 44% chance of an upward opening, implying a 56% chance of opening lower.
The timing of the sell-off coincides with the anniversary of the 1987 Black Monday crash, which saw the Dow plunge 22.6% in a single session. While the date has prompted historical comparisons, analysts cautioned that the coincidence does not predict a repeat of that event.