Global AI Stocks Drop After Industry Leaders Call for Slower Development

On September 14, global AI-linked stocks sold off after Anthropic co-founder and CEO Dario Amodei, OpenAI's Sam Altman and xAI's Elon Musk publicly backed slowing the pace of AI model development. Amodei's essay, titled "We Must Pace the Frontier," proposed a three-point plan of independent monitoring, industry regulation and global oversight; Altman responded, "I agree with Dario that we need to pace the frontier. Committing to having independent evaluators with employee-like access is a great idea, and we will do the same," while Musk separately voiced agreement with Amodei's proposal. Altman also said OpenAI would not pursue an IPO this year, citing safety concerns.

The market reaction was immediate and global. In the US, the Nasdaq 100 pared an intraday 1.2% decline to a 0.4% close at a six-week low, the Philadelphia semiconductor index dropped 5.2%, and Nvidia fell 3% to 3.36%, AMD fell 4.5% and Micron fell between 5.25% and 7% depending on the outlet and time of snapshot. Europe's tech sector fell 2.2%, and CNBC's tally of the session also showed declines at ASML (more than 5%), Nokia (8%), Infineon (more than 7%) and Intel (6%), with Amazon off only slightly.

The steepest moves were in Asia. SoftBank plunged more than 10%, reported as high as 13.2% by Reuters' Singapore desk, while Kioxia Holdings fell 9.8%, SK Hynix fell 5.3%, Samsung Electronics and Tokyo Electron each fell 3.7%, TSMC fell 1.2%, ChangXin Memory Technologies fell 3.6% and SMIC fell 2.6%. Chinese AI names were hit hardest of all: Zhongji Innolight fell 6.7%, MiniMax Group fell 7.8% and Z.AI fell 10.5%. Analyst Charu Chanana said, "When expectations are this high, even a possible delay can trigger profit-taking".

The slowdown call followed a threat-intelligence report Anthropic released the prior Thursday, and Amodei warned 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". Anthropic co-founder Jack Clark separately said AI is "getting smarter and more capable every few months" and represents a potential "major risk to society". A researcher who resigned from Anthropic, named Jacob Coxon in one Reuters account and Jason Coxon in a CNBC-sourced account, said people building AI "earnestly believe that it could kill us all by the end of the decade". President Trump pushed back on Truth Social, calling the AI-takeover warnings a "hoax" that "will not be stopped" per BBC, and, in a post CNBC reported separately, wrote that the only guardrail AI needs is a "STRONG AND SMART (High IQ!) PRESIDENT"; it is not confirmed whether both quotes come from the same post.

Not every market participant read the moment the same way: Interactive Brokers' Steve Sosnick said, "If this leads to a slowdown and rethink of AI spending, that will have ramifications for the economy," while investor Michael Burry dismissed the executives' warnings as "hype and puffery" and "cover for real uncontrollable slowing growth". The selloff also arrives against a backdrop of AI capital spending increasingly funded by debt and circular financing amid rising bond yields, a dynamic investors may continue to watch alongside any follow-through from the companies involved.