Global Bond Yields Hit 25-Year Highs as AI Debt Floods Market

The 30-year Treasury yield climbed to 5.32%, its highest since 2007, as record AI-driven corporate bond sales collide with a near $2 trillion federal deficit to force a global repricing of long-term borrowing costs.

"Whoever's issuing, be it a government or a hyperscaler or a non-hyperscaler credit, is now competing with more borrowers," said Tony Rodriguez, head of fixed-income strategy at Nuveen Asset Management. "And therefore yields have to be higher."

The move is global. France's 30-year yield reached its highest since 2008, Germany's equivalent climbed to 2011 levels, UK gilts approached 6 percent, and Japan's 30-year yield neared a 1999 peak. Investment-grade companies have sold nearly $1.5 trillion of bonds this year, up 36 percent from a year earlier, on pace to eclipse the 2020 record.

The repricing raises borrowing costs for governments and companies, compresses equity valuations through higher discount rates, and complicates the Treasury's effort to ease mortgage and consumer loan rates. Barclays estimates AI-related corporate issuance will add $474 billion of net supply this year, more than offsetting a $440 billion reduction in new Treasury notes and bonds.

Term Premium Climbs to 0.83% on Duration Supply

The direct driver is a surge in duration supply. The federal government is running a deficit near $2 trillion, with public debt interest payments reaching $1.17 trillion this fiscal year, up 15 percent from a year earlier. Corporate issuance is running even hotter: August high-grade bond sales hit $145.2 billion, surpassing the $136 billion monthly record set in August 2020, and year-to-date volume is 8.5 percent higher than the same period in 2020. Technology companies dominate, with Alphabet's $25 billion deal the largest of August and all eight of this year's $25 billion-plus investment-grade offerings coming from tech firms. JPMorgan recently raised its 2026 forecast for technology, media and telecom dollar bond issuance by about 20 percent to $540 billion.

The scale of duration supply has pushed the term premium — the extra compensation investors demand for holding long bonds over short ones — to 0.83 percent, near recent highs. "The larger the debt, the more duration supply the bond market must absorb, and all else equal, the term premium rises," said Gerard MacDonell, an economist at 22V Research.

Traditional long-bond buyers are retreating. Pension funds, once the most stable source of demand, are shrinking as plans shift from defined-benefit to defined-contribution structures and regulators encourage larger equity allocations. A bigger structural shift is underway at the sovereign level. The Fed's June meeting minutes showed officials were told that Treasury holders are moving from "official institutions that are relatively price-insensitive" toward "private investors who are more price-sensitive." Barclays' Anshul Pradhan estimates this buyer shift has added about 90 basis points to the 30-year term premium over the past decade, creating a floor under long-end yields even if short-term data improves.

Inflation expectations are adding pressure. The 10-day correlation between WTI crude and the 30-year Treasury yield has climbed to 0.85, from near zero on July 23, showing oil is now the market's core inflation variable. The 10-year real yield has risen to 2.44 percent while the breakeven inflation rate sits at 2.29 percent, both moving higher together. BMO Capital Markets' Ian Lyngen said energy remains "a potential catalyst for further bond-market downside" even as the macro data trajectory improves.

Japan's JGB Climb Raises Global Repricing Risk

Japan is the wildcard. The 30-year JGB yield is near its highest since 1999, reflecting market doubts that the Bank of Japan is normalizing policy fast enough. The 5-year, 2-year-forward OIS rate has climbed to 2.27 percent, near the upper end of the BoJ's estimated neutral range of 1.1 percent to 2.5 percent. "Japan was supposed to be the anchor of global rates," said Prashant Newnaha, senior rates strategist at TD Securities. "Further JGB yield increases raise the risk of a global duration repricing."

Fundstrat's Mark Newton sees the 30-year yield pushing toward 5.60 percent to 5.70 percent, while Deutsche Bank warns that current market pricing "leaves almost no margin for error." Citadel Securities' Nohshad Shah noted that even with policy rates 175 basis points below their peak, long-end yields remain near 20-year highs, reflecting market judgment that policymakers will take the easier path when forced to choose. AXA IM's Chris Iggo said the only thing that could break the impasse is a sudden economic slowdown or an external shock — "and the latter seems more likely than the former."

This article is for informational purposes only and does not constitute investment advice.