AI-linked stocks experienced a significant worldwide downturn on Monday, September 14, 2026, following warnings from the leaders of major artificial intelligence companies about the risks associated with rapid AI development. This selloff impacted Wall Street, Europe, and Asia, with the Philadelphia Semiconductor Index falling as much as 5.7% and the tech-heavy Nasdaq 100 dropping as much as 1.6%. The market reaction reflects concerns about a potential slowdown in AI spending, which has fueled market growth in recent years, despite some investors remaining skeptical about a significant pullback.
Key figures in the AI industry, including OpenAI CEO Sam Altman, Anthropic CEO Dario Amodei, and Elon Musk, have advocated for a deceleration in AI development due to safety concerns. This stance puts them at odds with financial markets and elements within the Trump administration. Anthropic, in particular, has seen internal warnings from researchers like Jacob Coxon and Evan Hubinger, with Hubinger suggesting a greater than 10% chance of human extinction from AI within the next decade. Despite these warnings, Anthropic is reportedly moving forward with an IPO, with Nvidia as a potential anchor investor, while OpenAI will not proceed with an IPO this year.
The market’s negative response highlights the industry's reliance on debt and circular financing to fund ambitious AI projects amidst rising global borrowing costs. The sell-off also signals potential challenges for chipmaker and AI supply-chain stocks in the short term. However, the selling appeared to taper off later in the day, with stocks paring losses as oil prices and bond yields retreated, suggesting some resilience or perhaps a wait-and-see approach from investors regarding the long-term implications of these safety calls on AI development and investment.
