Government bond yields surged across major markets on Tuesday, with borrowing costs in Japan and the U.K. reaching levels not seen in decades, and U.S. Treasury yields climbing sharply, as renewed hostilities between the U.S. and Iran around the Strait of Hormuz reignited inflation concerns [1]. The U.S. 10-year Treasury note yield rose 3 basis points to 4.7880%, marking a 20-month high [1]. Japan's benchmark 10-year note yield jumped more than 6 basis points to 3%, its highest since 1996, while the 2-year government bond yield touched a 31-year high of 1.81% [1].
In the U.K., 10-year government bond yields (Gilts) rose more than 9 basis points to 5.2341%, their highest since June 2008 during the Global Financial Crisis. The 30-year Gilt yield soared 9 basis points to 5.8856%, its highest since March 1998 [1]. German government bonds also saw increases, with the 10-year bund yield up more than 3 basis points at 3.3546%, a new 52-week high, and the 2-year bund yield reaching 2.9496%, its highest since July 2024. France's 2-year government bond yield rose to its highest level since April 2024 [1].
The spike in yields followed retaliatory strikes between the U.S. and Iran, which pushed energy prices higher and heightened inflation pressures. Brent crude was up 2.2% at $92.38 per barrel, while West Texas Intermediate futures rose 2.61% to $88.05 [1]. Treasury Secretary Scott Bessent downplayed concerns about rising U.S. yields, stating that the U.S. bond market remains "the best performing market" globally, and noting Fitch Ratings' reaffirmation of its AA+ rating on U.S. government debt [1].
Steve Englander, head of global G10 FX research and North America macro strategy at Standard Chartered, attributed the upward pressure on yields to the ongoing six-month conflict and a Supreme Court tariff ruling that removed roughly 40% of additional tariff revenue. Englander cautioned that yields across the curve will remain under upward pressure and emphasized that deficit problems are widespread, not limited to the U.S. "I think 'best performing', as Bessent said, isn't the same as well performing," Englander remarked, adding, "Everybody has a deficit problem—I don't think there's any reason to cheer" [1].
The rise in British government debt costs coincides with U.K. Prime Minister Andy Burnham reportedly preparing to address lawmakers about the need for greater public control to boost the country's growth. Burnham became the U.K.'s seventh prime minister in ten years in July [1].
CONCLUSION
Global bond yields have surged to multi-decade highs, driven by renewed Middle East tensions and inflation fears, with significant increases across U.S., Japanese, U.K., German, and French government bonds. Market sentiment remains cautious, as analysts warn of persistent upward pressure on yields and widespread deficit challenges. The market impact is high, with energy prices rising and policymakers addressing fiscal concerns.