Investors are reassessing valuations across the technology sector after prominent figures in artificial intelligence development called for a coordinated slowdown in model advancement, citing safety concerns. The shift in sentiment has triggered sharp declines in equity markets globally, with particular pressure on semiconductor manufacturers and companies dependent on rapid AI infrastructure expansion.
Shares in AI-linked firms across Asia fell sharply when trading commenced, with South Korea's KOSPI index declining 3.7%. Chipmaker SK Hynix dropped 5.75%, while SoftBank, a major investor in AI ventures, fell as much as 13% in Tokyo following OpenAI chief executive officer Sam Altman's statement that the ChatGPT-maker will not pursue a public listing this year. Taiwan Semiconductor Manufacturing Company declined 1.2%.
The market reaction intensified after Anthropic chief executive Dario Amodei published an essay over the weekend arguing that the industry must "slow down" development. Amodei contended that "building [AI] too fast is reckless" and warned that uncontrolled deployment of AI agents could inflict hundreds of billions of dollars in damage by "taking over the entire internet." Both Altman and Elon Musk quickly endorsed Amodei's position, marking rare alignment among leaders of competing AI platforms.
According to reporting on the Asian market reaction, SoftBank fell more than 10% in Tokyo, underscoring the severity of investor concern about AI-heavy holdings. A Sony Financial Group economist warned that the AI trade could face broader repricing across the sector.
Ipek Ozkardeskaya, senior analyst at Swissquote, characterised the market mood as decidedly negative, noting that a material slowdown in AI development raises critical questions about infrastructure financing.
So if the AI race slows materially, the key question becomes: who pays for all that infrastructure? The leases, debt and power commitments remain even if expected compute demand and revenue growth slow. And that could bring credit risk increasingly into the AI story, particularly for highly leveraged data-centre operators and lenders exposed to projects built on aggressive assumptions about future AI demand, at a time when interest rates – hence borrowing costs – are expected to rise.
What distinguishes this market shock is that the pressure for restraint originates not from capital constraints or investor reluctance, but from the researchers and executives actively developing frontier AI systems themselves.
How are European technology stocks responding?
Europe's technology sector has reached its lowest valuation in six weeks, as traders process the implications of the AI slowdown call. The Stoxx Europe 600 Technology index fell 2.3% to its lowest point since 31 July. Soitec, the French semiconductor materials company, led the decline with a drop of 12.8%, followed by Germany's Aixtron, which manufactures systems used in microchip production, down 9.3%. Infineon, a major semiconductor manufacturer, declined 7.45%.
Russ Mould, investment director at AJ Bell, observed that investor sentiment has shifted markedly.
Previously a hot investment area with investors clambering to own any stock linked to the AI boom, now it looks like AI's strengths could backfire. There are growing fears that AI is advancing at an extraordinary pace and there need to be greater safeguards and controls in place.
Futures markets signal further weakness ahead. Nasdaq-100 index futures point to a 1.4% decline when trading opens in New York. In the UK, the FTSE 100-listed Polar Capital Technology Trust was among the largest fallers in the blue-chip index, dropping 3%. Shares in Raspberry Pi, which manufactures low-cost computers capable of running AI models, fell 5.3%.
According to Bloomberg's market coverage, US equity-index futures extended the selloff beyond Asian and European equities, indicating that the shock to AI sentiment is reverberating across global markets.
Which companies are benefiting from the AI slowdown?
Not all sectors are suffering. Companies perceived as threatened by artificial intelligence advancement are experiencing gains. RELX, the analytics group, rose 4.2% and led the FTSE 100 gainers. Advertising group WPP gained 3.1%, suggesting that investors are rotating away from technology and into sectors that may be less disrupted by AI development.
What is driving the broader market turbulence?
Beyond the AI slowdown, multiple headwinds are pressuring financial markets. UK government borrowing costs have reached multi-year highs as rising oil prices fuel inflation concerns. The 30-year gilt yield touched 5.951%, its highest level since March 1998, while the 5-year yield reached its peak since July 2008. These elevated borrowing costs reduce the fiscal headroom available to Chancellor John Healey for meeting the government's borrowing rules.
The dollar strengthened on expectations of a US interest rate increase later in the week, rising nearly 0.5% against a basket of major currencies. The euro fell to a one-month low of $1.154, while sterling slipped 0.3% to $1.348.
Energy markets are also volatile. Brent crude oil climbed 2.8% to $107.50 per barrel, driven by concerns about potential supply disruptions from the Gulf region following a drone attack on Saudi Arabia's major pipeline to the Red Sea last week. European gas prices jumped more than 5% in early trading, pushing the month-ahead UK gas contract to 209.50p per therm, its highest level since late December 2022.
How is the airline industry responding to energy costs?
Rising oil prices have forced Latvian airline airBaltic to seek restructuring protection. The carrier filed for Chapter 11 bankruptcy protection in New York, a process designed to allow the company to reorganise its substantial debt while maintaining normal operations. AirBaltic, which is majority owned by the Latvian government, stated that the restructuring will not affect passengers or day-to-day operations.
Andrejs Martinovs, chairman of the supervisory board, explained the rationale for the filing.
We have carefully assessed the restructuring options available to the company, with one priority in focus – to give airBaltic the best possible basis to continue operating and to build a sustainable financial structure. Under court supervision and with protection from creditor claims, this process provides a clear framework and timetable for reaching agreements with creditors, including aircraft lessors and other stakeholders. At the same time, it allows the company to continue operating.
What do market analysts say about the AI slowdown?
Chris Beauchamp, chief market analyst at investing and trading platform IG, characterised the shift as a sudden reversal in market momentum.
Suddenly the headlong rush to develop AI seems to have stopped in its tracks. With both Altman and Amodei warning of the risks of uncontrolled development, the mood music appears to be shifting. For markets this raises the possibility of a slowdown in data centre rollout, or a throttling of demand for chips, both of which would undermine the foundations of the investment thesis in many big-name stocks. The news has sent a chill through markets in Asia and Nasdaq futures are lower too. This seems very much a knee-jerk reaction - AI use is still expected to explode, driving data centre construction even if the wilder experiments are rolled back, but it has hit a market already on edge ahead of the Fed decision this week.
Neil Wilson, investor strategist at Saxo UK, noted that the concerns appear genuine among those working on frontier models.
Will AI kill humanity? I couldn't tell you but there seems to be sufficient alarm among those working on frontier models to worry investors. AI stocks fell Monday as leaders of the world's biggest AI platforms are calling for a slowdown in the development of their most advanced models on mounting concerns that it's all getting out of hand.Wilson pointed to the resignation of Anthropic researcher Jacob Coxon as evidence of internal concern, and referenced unconfirmed reports that Google may have achieved a breakthrough in recursive self-improvement, a process where AI systems enhance their own capabilities with minimal human intervention.
Jim Reid, strategist at Deutsche Bank, expressed scepticism about whether the slowdown calls will translate into reduced investment.
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. It is hard to see China standing still.Reid suggested that rather than signalling reduced spending, the debate may alter the composition of AI investment toward safety and governance alongside continued infrastructure expansion.
What is Anthropic's three-step plan for AI development?
Amodei's essay, titled "We Must Pace the Frontier," outlined a framework for managing AI advancement. The first step involves building AI "at a balanced rate that aims to ensure its safety" by "ensuring companies take adequate time to align and safeguard their models, and for third party evaluators to confirm this."
The steps do not need to be taken strictly in order, and some of them may be much harder to achieve than others, but I've found them to be a useful framework in thinking about what needs to be accomplished.
The second step calls for industry-wide coordination to establish common safety standards and restrict "unchecked AI progress." The third involves global coordination between democratic states and "authoritarian governments." According to Bloomberg's reporting on Anthropic's safety initiatives, the company has committed to adding independent third-party evaluations as part of additional safety safeguards while urging a slowdown in frontier-model development.
Is Anthropic actually slowing down?
Despite the public calls for restraint, Anthropic has told its backers that it will achieve profitability this quarter, potentially easing investor concerns about the aggressive cash burn typical of frontier AI companies. The company reported adjusted operating income will be positive for the second consecutive quarter, with gross margins exceeding 80 per cent before accounting for revenue shared with distribution partners including Amazon and the cost of training its models.
Investor Michael Burry has questioned the sincerity of the slowdown rhetoric, arguing that AI companies benefit from discussing the risks of their technology. Burry identified four potential motivations: the claim that large language models do not constitute genuine artificial intelligence and therefore have nothing to slow down; that slowing benefits incumbent firms by impeding competition; that IPO marketing benefits from claims of transformative power; and that the slowdown narrative provides cover for uncontrollable growth deceleration as IPOs face delays.
Former congressman Rahm Emanuel, who served as chief of staff to Barack Obama, expressed scepticism about industry self-regulation.
I can tell you when the last time a CEO or an industry at large asked to be regulated: never. That's what makes Dario's letter so striking – it's an admission that we're driving down a dark, winding road on wet pavement with the headlights off.
President Donald Trump, speaking during a visit to his golf course in Ireland, downplayed the warnings, characterising them as "very negative forces" raising concerns that "won't happen." Trump expressed concern about maintaining American leadership in AI relative to China, stating "whoever wins AI, wins."
What is happening with OpenAI's valuation and IPO plans?
The anticipated value of OpenAI has declined following the slowdown announcement. IG, a broker offering contracts where traders can bet on the company's valuation, reported that its OpenAI Pre IPO market-cap contract fell from a high of $1.64 trillion to $1.57 trillion, representing a pullback of approximately $70 billion. The contract had rallied following the release of Astra to approved users on 3 September.
Sam Altman indicated that a stock market float this year would be "ill-advised," suggesting further delays to Anthropic's planned IPO, which is already rumoured to be postponed by a month to November. The AI-related sell-off creates an unfavourable backdrop for major IPO launches by frontier AI companies.
What economic data is scheduled for release?
Several significant economic indicators are due for publication. India's inflation report for August will be released at 11.30am BST, followed by Canada's inflation report for August at 1.30pm BST. European Central Bank president Christine Lagarde is scheduled to deliver a speech in Vienna, Austria at 4.15pm BST.
Key Facts
- Anthropic CEO Dario Amodei called for a coordinated slowdown in AI development over the weekend, backed by OpenAI's Sam Altman and Elon Musk, triggering sharp declines in technology stocks globally.
- Asia-Pacific markets fell sharply, with South Korea's KOSPI index down 3.7%, SoftBank down more than 10%, and semiconductor stocks under severe pressure across the region.
- Europe's Stoxx Europe 600 Technology index fell 2.3% to its six-week low, with semiconductor equipment makers Soitec and Aixtron leading declines of 12.8% and 9.3% respectively.
- UK government borrowing costs reached multi-year highs, with 30-year gilt yields at 5.951% (highest since March 1998) and 5-year yields at their peak since July 2008, pressuring fiscal headroom.
- Energy markets remain volatile, with Brent crude up 2.8% to $107.50 and UK gas prices at their highest since late December 2022, driven by Middle East supply concerns and inflation worries.
