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Part of: Iran Oil Shock

Global bonds sell off on inflation shock; 30-year yield hits 2007 high

A sharp global bond rout intensified on May 15 as oil price spikes and Iran war concerns reignited inflation fears, pushing the US 30-year Treasury yield to its highest level since 2007 and pressuring equity valuations across all major indices. The selloff spans Japan to the US, with gilt yields surging in the UK and forcing a reassessment of rate-cut expectations into 2026.

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Key facts

  • US 30-year Treasury yield hit 5.11%, highest level since May 2025, amid global bond selloff
  • Oil price surge triggered by Iran war; Strait of Hormuz supplies 20% of global crude
  • JPMorgan, Goldman Sachs cite return of 'bond vigilantes' and inflation repricing dynamics
  • S&P 500 futures down ~1% on May 15; European stocks fell most since late March
  • Rate-cut expectations pushed back into late 2026 as Fed seen on hold through inflation shock

What's happening

The global fixed-income market experienced its most significant shock in months as investors fled bonds amid mounting evidence that war-driven oil supply disruptions will keep inflation elevated longer than previously priced. The selloff accelerated through May 15, with the 30-year US Treasury yield climbing to levels not seen since 2007, a regime shift that caught many positioning for a dovish Fed pivot.

Major forecasters including oil demand trackers have slashed consumption expectations for 2026 after the Iran conflict disrupted critical shipping routes. The Strait of Hormuz, which handles roughly 20% of global oil flows, faces potential closure, prompting spot crude to remain elevated and energy importers to face margin compression. Goldman Sachs and JPMorgan strategists acknowledged the bond market's "bond vigilante" dynamics returning, with Kay Herr at JPMorgan Asset Management warning that investors are repricing rate assumptions as central banks confront an uncomfortable inflation-growth trade-off.

Equity markets reacted swiftly to the yield shock. US stock futures fell roughly 1% as of early Friday morning, with European equities posting their worst day since late March. The S&P 500 and Nasdaq both experienced profit-taking after weeks of record highs fueled by AI enthusiasm. Critically, memory and semiconductor stocks suffered outsized declines as investors questioned whether elevated rates would undermine the capex cycle underpinning the AI rally. The rotation into cheaper industrials and defensive value gained traction, though RBC strategist Lori Calvasina warned that a 5% yield level would meaningfully compress price-to-earnings multiples.

Sceptical voices point out that oil prices, while elevated, remain well below crisis levels of prior decades, and that inflation data outside energy has stabilized. However, Morgan Stanley and other strategists flagged that persistent energy price pressure combined with tighter financial conditions poses a material risk to corporate margins and consumer spending momentum heading into summer. The real test will be whether central banks, including an incoming Fed chair in Kevin Warsh, can credibly communicate an "on-hold" posture or face market-driven tightening.

What to watch next

  • 01US CPI data: mid-late May, could trigger further yield re-rating
  • 02Warsh Fed chair transition: Monday May 20, first communication on policy path critical
  • 03Iran war escalation or de-escalation: directly impacts oil supply assumptions
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Live coverage of the Iran conflict, Persian Gulf oil supply disruption, OPEC reaction and the cross-asset trades pricing it.