A row of towering government bond certificates stacked like dominoes mid-fall across a polished trading floor, with rising yield curves etched into the marble beneath them, wide shot from a low angle, cold blue key light from above mixed with a faint amber glow from the right, deep shadows and shallow depth of field.

Bond Vigilantes Stir as Global Debt Costs Hit Multi-Decade Highs

By Oliver BennsSeptember 11, 2026

Government bond yields in Japan, the UK, Germany and France all hit multi-decade highs last week, while the US 30-year Treasury yield touched its highest level since before the financial crisis. US national debt has crossed $40tn, with several major economies now spending more servicing debt than on defence. A UK gilt auction cleared at the steepest borrowing cost since 1998, and Treasury buyback efforts have failed to pull long yields lower.

Hyperscaler Bond Binge Crowds Out Sovereign Borrowers

Big Tech's AI capex has outgrown free cash flow, pushing Meta, Microsoft and Amazon into the corporate bond market at scale. Smaller European governments have reshuffled debt auction timing to avoid clashing with hyperscaler issuance, as investors weigh whether Meta paper is a safer credit than sovereign bonds of similar duration. Anthropic and OpenAI are now in talks with rating agencies about investment-grade ratings.

Fed Rate Hike Back on Table Weeks Before US Midterms

A blowout US jobs report has flipped market pricing to a two-in-three chance of a rate increase this month, with traders now positioning for up to three quarter-point hikes through March. Fed chair Kevin Walsh has signalled inflation is running too hot, setting up a clash with Donald Trump, who has threatened new trade tariffs if rates are not cut.

France Emerges as Europe's New Debt Problem Child

French borrowing costs have pushed above Italy's as a polarised political system struggles to pass a budget ahead of next year's presidential election. The European Central Bank is expected to backstop any serious stress, but confidence in French fiscal management is deteriorating. Germany's borrowing costs have also risen as Berlin abandons decades of debt aversion.