Global Bond Rout Accelerates: US 30Y Yield Hits 5.11%, Highest Since May 2025

Bond markets experienced a sharp inflection on May 15 as yields surged globally, with the U.S. 30-year Treasury rising to 5.11%, a level not seen since mid-2025. The catalyst was a confluence of war-driven energy inflationThe rate at which prices rise across an economy., particularly oil price spikes due to Iran tensions, and persistent consumer price pressures that have forced central banks and investors to reprice growth and inflation risk. Traditional safe-haven buying dried up, replaced by a wave of profit-taking and hedging unwinds that had propped up equities for weeks.

The damage spread across all major bond markets. UK gilts suffered their worst week in years following political uncertainty around Manchester Mayor Andy Burnham's challenge to PM Keir Starmer. Japanese government bonds fell sharply as the Bank of Japan held its policy stance amid global inflationThe rate at which prices rise across an economy.. The European bond markets similarly cratered as recession fears mixed with inflation concerns. Bank of America strategists warned that U.S. stock markets are ripe for profit-taking in early June given the crowded positioning and rising inflation headwinds. JPMorgan and Columbia Threadneedle analysts called out the return of "bond vigilantes," a term describing market-driven discipline on fiscal and monetary policy.

Equity indices retreated sharply following the bond sell-off. The S&P 500 declined roughly 1%, while the Nasdaq fell 1.3%; the Russell 2000 outperformed with a 0.7% gain as rotation into value and small-cap names persisted. Semiconductor names like AMD, NVDA, and MU sold off 3-5% as rising real yields and tighter financial conditions weighed on growth valuations. Energy importers faced margin compression, though oil and energy exporters including Nigeria's Oando saw revenue tailwinds from elevated crude prices.

Critiques of the selloff point to the extraordinary nature of the move: yields rising to decade highs despite modest economic data surprises suggests technical overextension in the bond market. Some observers argue the Iran war premium in oil is temporary and will normalize, which could reduce inflationary pressures and allow yields to retreat. RBC's Lori Calvasina warned that a 5% yield on Treasuries could further challenge equity valuations, but others note that a "soft landing" scenario might prevent that threshold from being tested.