Bond markets across the world are experiencing a synchronized selloff, driving borrowing costs to levels not seen in years. From Washington to London to Tokyo, the pressure is reshaping economic expectations and political calculations for 2026.
"Rates will stay higher for longer and investors should plan accordingly," warns Torsten Slok, an economist at Apollo Management. Nowhere is this more evident than in Japan, where the global turmoil is putting Tokyo in an uncomfortable spotlight.
Yields on 30-year Japanese government bonds (JGBs) have climbed to their highest since the maturity was first issued in 1999. The $31 trillion U.S. Treasury market is also under scrutiny, with the 30-year yield reaching 5.18% on Tuesday, the highest since 2007, driven by surging oil prices and inflation fears.
"With debt rising faster than growth, worsening inflation profiles and no political will for fiscal reform, there is little reason to reach for the long end," says Ajay Rajadhyaksha, global chairman of research at Barclays Bank.
Japan's Debt Dilemma
Japan faces a unique set of challenges. The country manages the world's largest debt burden relative to its economy, with a debt-to-GDP ratio of 260%, while its population is shrinking faster than any other developed nation. The 10-year JGB yield has surged to 2.77%, a troubling level for a nation that has relied on ultra-low rates for decades.
Prime Minister Sanae Takaichi has added to the uncertainty. Before taking office last October, she rattled markets with talk of tax cuts and increased stimulus spending. Her predecessor, Shigeru Ishiba, warned in May 2025 that Tokyo's finances were "worse than Greece." Now, Takaichi is directing Finance Minister Satsuki Katayama to rush an extra budget into existence as rising commodity prices hit consumer confidence—a reversal from her earlier stance that no new borrowing was needed.
The risk of a "Liz Truss moment" in Tokyo looms large. In late 2022, then-UK Prime Minister Liz Truss destabilized bond markets with unfunded tax cuts, a cautionary tale for Takaichi as her party considers fiscal loosening. The global selloff is amplifying these fears, as geopolitical tensions in the Middle East further complicate Japan's economic outlook.
"The Middle East conflict has prompted a revision of our growth and inflation forecasts for Japan," notes Deborah Tan, an analyst at Moody's Ratings. "Higher inflation and prospects of additional fiscal support are putting pressure on JGB yields."
The Yen-Carry Trade Under Pressure
Japan's role as the world's top creditor nation adds another layer of complexity. For 27 years, the Bank of Japan kept rates at or near zero, turning Tokyo into a source of cheap funding for global investors. The so-called "yen-carry trade"—where funds borrow in yen to invest in higher-yielding assets abroad—is one of the most crowded trades in global markets.
Now, as the yen weakens toward 160 against the dollar, sudden moves in the currency are disrupting markets worldwide. The risk of a sharp correction is higher than ever, with potential ripple effects across Asia and beyond.
Robin Brooks, an economist at the Brookings Institution, observes that "Japan has been in a slow-motion blow-up of exactly this kind for two years." He adds that "'Liz Truss' bond market selloffs are becoming more common across the G10 as debt levels rise and institutional integrity declines."
While 90% of JGBs are held domestically—by banks, insurance companies, pension funds, and the postal system—reducing the risk of capital flight, the global shockwaves are inescapable. The collective incentive to hold debt may not be enough to shield Tokyo from the broader turmoil.
The UK is also under pressure, with gilt yields reaching the highest in the G7 amid political uncertainty and fears of a repeat of the Truss-era fiscal shock. Economists Fatih Yilmaz and Neil Staines at Eurizon SLJ Capital warn that a "further sustained increase above 7% could trigger a deep recession and a full-blown fiscal credibility crisis."
For Japan, the immediate challenge is balancing fiscal stimulus with debt sustainability. As Takaichi navigates this tightrope, the global bond selloff is a stark reminder that no market is immune to the tremors shaking the financial system.
