Nvidia, SK Hynix and ASML fall while Anthropic presses ahead with a listing expected next month
AI-linked stocks fell across Asian, European and US markets on Monday, September 14, 2026, after the chief executives of the largest artificial intelligence developers called for a slower pace of model development.
The S&P 500 slipped 37.00 points to 7,619.98, a decline of 0.5 percent, AP reported, while the Dow Jones Industrial Average dropped 152.09 points to 52,421.20 and the Nasdaq composite fell 146.62 points to 26,186.41.
More stocks rose within the S&P 500 than fell.
Dario Amodei, chief executive of Anthropic in San Francisco, called on AI companies to slow the rate at which they advance model capabilities in an essay shared on X on Saturday.
Progress "will still seem fast," Amodei wrote in the essay, quoted by CNN, naming losing control of AI systems, misuse for cyberattacks and bioterrorism, and economic disruption as the risks.
Amodei wrote that within six to 12 months AI agents "could be capable of taking over the entire internet potentially causing hundreds of billions of dollars in damage," according to Reuters.
According to the same outlet, Sam Altman of OpenAI and Elon Musk of xAI both said they agree with Amodei.
The New York Times reported that Demis Hassabis, co-founder of Google DeepMind, also endorsed the post, and that Amodei said he would hire third-party "evaluators" who would "verify adherence to safety practices and commitments."
The Philadelphia chip index dropped 5.2 percent, Reuters reported, with Nvidia down 3 percent, Advanced Micro Devices off 4.5 percent and Micron falling 5.4 percent.
CNN put the same index down almost 6 percent, its worst day since early July, and Nvidia down 3.4 percent.
Reuters reported that Lam Research, Applied Materials and Bloom Energy each lost more than 6 percent.
Server and infrastructure names fell further, per CNBC, with Hewlett Packard Enterprise down about 11 percent, Dell down 6 percent, Oracle down 4 percent, CoreWeave down about 7 percent, and liquid cooling provider Vertiv down about 8 percent.
Data centre operators Equinix and Digital Realty Trust each declined more than 3 percent.
South Korea's KOSPI closed down 3.3 percent, Reuters reported, with SK Hynix falling 6.4 percent according to CNN.
SoftBank lost 10.7 percent in Tokyo, per AP.
Europe's tech sector fell 2.2 percent, dragged by a 6 percent decline at ASML, Reuters reported, while The New York Times reported TSMC down 1.2 percent.
The Nasdaq is down about 3.3 percent since reaching a record high in early June 2026, CNN reported.
Palo Alto Networks and CrowdStrike each jumped more than 13 percent, CNBC reported, with Okta, Zscaler, Qualys, SentinelOne and Netskope also recording double-digit gains.
Both CrowdStrike and Palo Alto have participated in early testing for unreleased OpenAI and Anthropic models.
"For the time being, deep and complete monitoring of all computer systems is the only way to have an opportunity to identify when AI does not follow original intent or veers of that path," SentinelOne chief executive Tomer Weingarten told CNBC.
Software names rose, with Intuit up 5.5 percent, Autodesk up 7.8 percent and Adobe up 5.3 percent, AP reported. Salesforce and ServiceNow also gained, per CNBC.
Steve Sosnick, chief market analyst at Interactive Brokers in Greenwich, Connecticut, said a slowdown in AI spending would affect the economy and key stock market sectors.
Markets have been running on that spending, he told Reuters.
Dennis Dick, founder and market structure analyst at Triple D Trading in Ontario, told Reuters that the news reads as "a hiccup" for AI stocks rather than a turning point.
Hardware names are selling off while software names attract buyers, he said, describing a "violent rotation" that morning.
Peter Andersen, founder of Andersen Capital Management in Boston, told Reuters, "It's a knee-jerk reaction and I can't see that there is any data to back it up. We are far, far away from AI taking over the world."
Michael Burry said in a message on X that the warnings were "hype and puffery" and "cover for real uncontrollable slowing growth," Reuters reported.
Deutsche Bank said in a note carried by Reuters, "The competitive race between companies and countries remains intense, and it's difficult to imagine firms voluntarily stepping back while rivals continue to push ahead."
Morgan Stanley forecast earlier in 2026 that AI spending will surpass US$1.3tn by 2027.
CNBC put expected AI infrastructure outlay at over US$1tn a year.
AI-led momentum in global equity markets has "wobbled" in recent months, the Bank for International Settlements said in its quarterly review published Monday, pointing to signs of vulnerability in the tech sector.
The review tied concerns about AI investment profitability and profit margins to increasing leverage at major US tech firms, CNN reported.
Altman told Fortune in remarks published Saturday, September 12, that OpenAI would not proceed with a listing in 2026, per CNN, saying, "I actually think that, given everything happening with safety, right now would be an ill-advised moment to go public, and we don't feel pressure on that."
Anthropic's own listing is expected next month, and sources told Reuters the company is in talks to bring in Nvidia as an anchor investor.
