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TruaceTracing the truth around AITuesday, September 15, 2026
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Business·P Space·Evidence-backed problem·Published 2026-09-15

AI-linked stocks slide after tech bosses call for slowdown in ‘reckless’ development

Abstract: AI-linked stocks tumbled on Monday after the bosses of Anthropic, OpenAI and SpaceX called for a slowdown in AI “reckless” development, citing fears the technology could soon run out of control. Shares in the semiconductor designer Nvidia – the world’s most valuable company – were down 3.3% by market closing in New York City, while Advanced Micro Devices (AMD) slid 4% and Micron Technology and Sandisk shares slumped by 5%. The tech-heavy Nasdaq index fund was down 0.5% by the end of the day. The sell-off came af…

TRV-2026-1090JournalismPermanent record — cite & verify
AI-linked stocks slide after tech bosses call for slowdown in ‘reckless’ development
The quick read

On Monday 14 September 2026, AI-linked stocks fell after the heads of Anthropic, OpenAI and SpaceX backed a call to slow reckless frontier AI development. Nvidia closed down 3.3% in New York, AMD down 4%, Micron and Sandisk down 5%, ASML down 6% in Europe, SoftBank down 13% in Japan, and the Nasdaq index fund down 0.5%, while the Kospi dropped 3%.

The sell-off matters because it shows how safety warnings from inside the AI industry can immediately affect valuations tied to hundreds of billions of dollars in AI infrastructure spending. It remains uncertain whether the dip reflects a lasting repricing or a short-term reaction, especially as the claims about catastrophic risk are disputed and political leaders publicly reject new guardrails.

Main points
  • Anthropic CEO Dario Amodei appealed for the industry to slow down, warning that building too fast is reckless and a swarm of AI agents could cause large-scale damage.
  • OpenAI CEO Sam Altman, Google DeepMind chief Demis Hassabis and SpaceX boss Elon Musk posted support for Amodei's essay titled We Must Pace the Frontier.
  • Nvidia fell 3.3%, AMD slid 4%, Micron and Sandisk slumped 5%, ASML slumped 6%, SoftBank slumped 13%, and the Nasdaq index fund was down 0.5%.
  • Donald Trump dismissed calls for more controls, calling concerns a hoax and saying robots are not going to be taking over the world.
Problem

AI-linked equities fell after leading AI executives called for a slowdown in reckless frontier development, with investors pricing in reduced ability to fund AI infrastructure.

The rundown

On 14 September 2026 the Guardian reported a broad sell-off in AI-exposed equities following a weekend appeal by Anthropic's Dario Amodei to slow down frontier development. The piece lists declines across US, Asian and European chip and investor names and notes the UN security council planning a meeting on AI.

The same report notes a counter-move in London where firms seen as threatened by AI tools gained, and cites political pushback from Donald Trump who dismissed controls as a sick conspiracy and told an AI conference audience via speaker phone that concerns were a hoax.

Sources

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