Global Bond Yields Surge Amid Deficits, AI Debt and Energy Price Pressures
Government bond yields in the United States, Europe and Japan have risen to multi-decade highs as higher deficits, a wave of AI-related corporate borrowing and rising energy prices fuel a broad market sell-off.
Bond markets across the United States, Europe and Japan have experienced a sharp sell-off, pushing long-term yields to their highest levels in many years. Analysts attribute the move to a combination of expanding government deficits, a surge in corporate borrowing to fund artificial-intelligence projects and heightened inflation concerns linked to rising energy prices.
In the United States, the 30-year Treasury yield rose above 5.31%, up from below 5.00% at the end of June, marking its highest point in almost two decades. European yields have approached levels seen during the 2011 euro-crisis, with Germany’s 30-year bund reaching 3.75% and the United Kingdom’s 30-year gilt nearing 5.85%, the highest since 1998. Japan’s comparable long-term yields have also moved close to all-time highs.
“It’s multifaceted,” said Brad Collins, senior fixed-income client portfolio manager at Vanguard. “There are so many components at play.”
“This is a global repricing,” said Steve Boothe, portfolio manager and head of global investment-grade bonds at T. Rowe Price.
“The more important part is the signaling from it. If yields go too far, Treasury will try and fight it, and now we know where some pain points are,” said John Briggs, head of US rates strategy at Natixis.
“The backup in long-end government yields is real, but we think this is a necessary normalization, not a crisis,” said Lawrence Gillum, chief fixed-income strategist for LPL Financial.
The U.S. Treasury announced an unexpected increase in purchases of older long-term debt, aiming to temper the yield rise, though the planned buying represents less than 3% of outstanding Treasury debt. Analysts note that the move is largely symbolic, with underlying structural pressures expected to persist.
Inflation pressures remain elevated in the United Kingdom, the eurozone and Japan, driven by higher energy costs linked to the conflict in Iran. In the United Kingdom, inflation rose to 2.9% in July, while eurozone inflation also reached 2.9%, prompting markets to price a high probability of a 25-basis-point rate hike by the European Central Bank in September.
In the United States, recent inflation data have been described as relatively benign, and expectations for a Federal Reserve rate increase in September have fallen to about 35%.
Fiscal concerns are adding to the strain. U.S. total debt surpassed $40 trillion, and European governments are facing higher deficits due to increased military spending. Japan’s public debt exceeds 200% of GDP, and a potential repatriation of Japanese investors could add further upward pressure on U.S. Treasury yields.
A notable driver of the bond market imbalance is the rapid expansion of AI-related corporate debt. Major technology firms have issued large volumes of bonds to finance data-center and AI infrastructure projects, far exceeding earlier forecasts. By late July, AI-related issuance in investment-grade and leveraged markets was approaching $500 billion, well above the $322 billion projected for 2026. Hyperscalers now account for a significant share of issuance in smaller markets, such as 21% of Canadian and 19% of Swiss franc-denominated investment-grade corporate debt.
“If we repeat this next year, we’ll have increased volatility in the back half of the bond market, and you’ll see yields continue to turn higher,” said Boothe.
Overall, analysts view the rise in yields as a normalization driven by a strong economy, heightened AI capital spending and persistent fiscal and inflationary pressures, rather than an imminent crisis.