IMF seems to warn an AI share crash, rising yields or cyberattack could unsettle markets

The International Monetary Fund seems to have warned that an artificial-intelligence selloff, a sharp rise in government bond yields or a major cyberattack could unsettle still-resilient markets. In its October Global Financial Stability Report, released Tuesday, October 13, in Bangkok during the IMF–World Bank annual meetings, the fund said financial-stability risks remain “elevated,” the Guardian, Reuters and AFP report. The Guardian posted the earliest report this desk saved (23:15 EDT Monday / 8:15 p.m. PT Monday, modified 05:48 EDT Tuesday). Reuters wrote against “complacency” in global financial markets. CNBC says more than 18,000 delegates gathered in Bangkok for the meetings.

The IMF listed three “salient risks,” the Guardian reports: an AI share-price crash, rising government borrowing costs, and a big cyberattack. It called that trio “plausible near-term catalysts for a sharp tightening of financial conditions and market turmoil,” according to the Guardian, Reuters and AFP. “These risks by themselves do not necessarily threaten financial stability but could become systemic…if they are amplified by underlying vulnerabilities,” the fund said, according to Reuters. AFP, via The Star and The Hindu, quotes the same “plausible near-term catalysts” line and the “elevated” label.

On artificial intelligence, the fund treats the boom as both support and risk. AI investment has helped offset drags from the Middle East war and policy uncertainty, Reuters reports. Yet the IMF warned of “growing evidence” that AI capabilities “may not require investment on the massive scale being undertaken by ‘hyperscaler’ firms,” and that “potential economic gains may not be as large as expected,” the Guardian reports; Reuters and AFP paraphrase that “growing evidence” line in their own words. “Weaker or less durable investment and profitability in AI could trigger a correction in AI-related asset prices, exacerbated by rising leverage, concentrated exposures, and circular financing arrangements,” the IMF said, according to the Guardian. Such a reassessment would then “sharply reduce investment, trigger equity market corrections, and tighten financial conditions, with global spillovers,” the Guardian reports the fund as saying. “The consequences of an AI correction could be global,” the IMF warned, the Guardian and Reuters report.

Athanasios Vamvakidis, deputy director of the IMF’s monetary and capital markets department, told reporters while launching the report: “the exposure of the rest of the world to US assets, particularly AI, is the highest it has ever been. So this is supporting the global economy through wealth effects today; but if we get a market correction it could have broad implications,” the Guardian reports. The Guardian says that, aside from the United States, Asian markets would face the most exposure, while the UK and the euro area would look more insulated — though investors who hold US assets would still feel a hit. The Guardian also reports that the “magnificent seven” big tech stocks — Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia and Tesla — account for more than 35% of the S&P 500, up from 12% a decade ago, and that their combined market capitalisation has risen by more than 50% in the past two years.

Leverage seems to amplify the risk. Hyperscalers now represent 10% of global investment-grade bond issuance, up from less than 1% in 2024, Reuters and CNBC report. The IMF called on policymakers to curb leverage, including derivatives and margin loans, where it looks “excessive,” Reuters reports. CNBC focuses on a web of “circular” financing among AI firms: since 2023, 14 publicly disclosed deals channeled about $300 billion of equity, led by hyperscalers, into financially weaker AI firms, alongside $650 billion of debt, in exchange for $1.4 trillion of “future revenue commitments” through services or chip orders, CNBC reports. The Guardian gives the same $300bn / $650bn / $1.4tn trio for transactions between hyperscalers and “weaker AI firms” over the past three years, without the “14 deals” or “since 2023” framing. Jason Wu, an assistant director in the IMF’s monetary and capital markets department, told a press briefing: “What makes this a little bit unusual compared to previous deals is the future revenue commitments, hence the circularity,” CNBC reports. He also said: “If there are questions about the monetization in AI, the equity investments will deplete in value, the debt may be difficult to service, and the revenue commitments in the future may not materialize,” calling that a “triple whammy,” according to CNBC. “If there are some kind of issues with those entities, then the circularity would pose risk to the market,” Wu added, CNBC reports.

Sovereign bond markets form the second pillar of the warning. Bond-market risks have worsened since the fund’s April report, as higher energy prices have pushed government yields up, Reuters reports. High debt loads and rollover risks leave the bond market “susceptible to more frequent fiscal and inflation shocks,” CNBC quotes the report as saying. “Impact could be severe given the foundational importance of sovereign bond markets,” the IMF said, according to CNBC. The fund also warned of “a sharp rise in sovereign bond yields,” CNBC reports. CNBC says the IMF had warned last week that global public debt had reached near its highest level since World War II and sat on track to exceed 100% of GDP. Reuters says historically high sovereign debt and unresolved fiscal deficits in major economies add pressure, and that the group called on policymakers to put public debt on a sustainable path.

Hedge-fund positioning in US Treasuries adds another channel. Hedge funds’ share of US Treasuries rose to about 9% in 2025 from about 4% in 2022, mostly through highly arbitraged strategies, the IMF said, citing Federal Reserve data, according to CNBC. That leaves the market “susceptible to a disorderly unwind,” the IMF said, CNBC reports. Caio Ferreira, the IMF’s deputy division chief for financial supervision and regulation, said the worry stems from rising leverage and overlapping positions across funds, CNBC reports. Liquidity has held up in the United States, Europe and the UK, the IMF said, while Japan’s government-bond liquidity has “continued to deteriorate,” CNBC reports.

Cyber risk forms the third catalyst. Technological change and reliance on a small number of critical providers make cyber defense harder, Reuters reports. In over 70% of cases so far in 2026, software providers had almost no time to patch vulnerabilities before attackers exploited them, a 20-percentage-point jump from a year earlier, Reuters reports. “Severe cyber incidents could undermine market confidence and disrupt critical financial market infrastructure and operations,” the IMF said, according to AFP. As AI improves, the risk of successful attacks on “critical financial institutions or market infrastructure” grows “worse,” AFP reports. The fund said AI can help with defense even as AI models also make attacks more sophisticated, Reuters reports, and it urged policymakers to boost cybersecurity capacity, including stricter oversight of third-party technology vendors.

Stress tests still show banks’ capital cushions as robust in a hypothetical downturn tied to an AI slowdown and bond-market fragility, Reuters reports. Yet the fund warned of “pockets of weakness,” with banks that represent 22% of global banking assets showing “weak” capital levels under the test, up from 18% under the 2025 test, Reuters reports. This desk could not open the IMF report itself (imf.org returned a tiny 403-style page to curl, as with Monday’s World Economic Outlook) or a direct Reuters.com copy, and cites the report through the Guardian, Reuters syndication, CNBC and AFP reprints.