The International Monetary Fund used its October Global Financial Stability Report, released Tuesday during the annual meetings in Bangkok, to warn that sovereign bond markets have become susceptible to a sharp and disorderly rise in yields. The Fund said high debt loads and heavy rollover needs leave markets exposed to more frequent fiscal and inflation shocks, at a moment when yields in several advanced economies already sit at multidecade highs on higher energy costs and expectations of tighter monetary policy.
The stock numbers explain the concern. Global public debt was close to 94% of GDP in 2025 and, on the Fund’s projection, reaches 100% by 2029, near its highest level since the Second World War. Governments must refinance large volumes of that debt at today’s far higher coupons while also funding continuing deficits, so even a modest loss of investor confidence can move yields quickly rather than gradually.
Two newer amplifiers run through the report. Hedge funds now hold about 9% of outstanding US Treasuries, more than double their share in recent years, raising the risk that leveraged positions unwind in a disorderly way under stress. At the same time, borrowing by technology companies for the AI buildout is competing directly with governments for the same investor capital: hyperscalers account for roughly 10% of global investment-grade bond issuance, up from less than 1% in 2024.
The Fund stressed that the consequences would not stay inside the bond market. A sharp rise in yields would mark down asset values through higher discount rates, including AI-related assets, and erode the value of government bonds posted as collateral across the financial system. That is why the report treats sovereign debt sustainability and leveraged trading in core markets as a single financial-stability problem rather than separate fiscal and market stories.
For Tuesday’s trading, the warning lands as a backdrop rather than a trigger: US yields eased on the reopen after the Columbus Day holiday and Brent crude fell, giving markets a calmer session. The IMF’s point is about the next shock, not this morning’s price action, and it gives official backing to the term-premium rebuild that investors have been pricing since September.