Global Bond Yields Surge as Excess Supply and Climate-Driven Inflation Strain Markets
Interest rates are climbing across the Western world despite stable long-term inflation expectations, driven by excess bond supply, climate-related cost increases, and a shift in bond ownership to hedge funds. The surge is pressuring governments, hurting the U.S. property market, and raising fears of financial instability.
Bond yields have climbed sharply across major economies since the start of the year, creating tension with stock markets and placing intense pressure on vulnerable governments. Canada’s 10-year bond yield has risen half a percentage point, while yields in the United States, France, and Japan have increased by more than twice that amount.
The causes of the global rate surge remain unclear. Long-term inflation expectations among investors have not risen significantly. A Financial Times analysis initially correlated bond yields with oil prices, suggesting the Iran war triggered the surge, but yields continued to climb even after oil prices plateaued. Similarly, a Bank of England team found that hawkish statements from Federal Reserve governors drive interest rates up, though the upward trend persists even when officials turn dovish. U.S. 10-year bond yields have now exceeded the level predicted by nominal GDP growth models, reaching around 5 per cent. Investors are actively dumping U.S. bonds, contradicting the Treasury Secretary's assertion that he was "the house" against which traders shouldn't bet.
Several structural factors are contributing to the rise. Across the Western world, there is an excess of supply over demand in bond markets, driven by rising government debt and massive borrowing from hyperscalers. This excess bond supply is choking capital availability for the rest of the economy. Outside of AI, investment in much of the U.S. economy is flat, and construction of most things other than data centres is declining. Plunging bond prices have sent yields sharply upward.
Climate change and extreme weather are also playing a role by raising costs for insurance, food, and energy infrastructure, contributing to persistent inflation. The FAO food price index is up nearly 6 per cent since last year, largely due to extreme weather impacts, and this persistent inflation is affecting grocery store shelves via food price increases.
Market dynamics have further amplified the volatility. Bond ownership has shifted from long-term holders like central banks and pension funds to short-term speculators like hedge funds, increasing interest rate volatility.
The consequences are already visible. Rising interest rates are negatively impacting the American property market, while the Canadian property market has been spared the worst effects. Governments are feeling strong internal pressure. The French government is implementing budget cuts to placate bond investors amid rising yields. Britain faces potential financial panic similar to the 2022 Liz Truss mini-budget crisis if its next budget disappoints investors. Analysts warn that without an AI productivity breakthrough, rates may continue to rise until the stock market corrects.