The Iran war has fundamentally altered the landscape for bond investors, who are now finding themselves acting more like oil traders. The conflict has led to a dramatic escalation in oil prices, with Brent crude surging from below $70 a barrel to over $80, and at one point touching nearly $110 a barrel. This sharp increase in energy costs is directly influencing inflation expectations and, consequently, bond yields across the globe.
The benchmark 10-year Treasury yield, which was below 4% before the war began in late February, briefly topped 5% for the first time since 2023. This surge, exceeding 100 basis points, highlights the direct link between geopolitical events impacting oil supply and the fixed-income market. European bond yields, including German Bunds, and Asian bond yields have also followed suit, reflecting a global impact.
Analysts like Neil Shearing, group chief economist at Capital Economics, note that after years of above-target inflation, central bankers are less likely to disregard the inflationary effects of supply shocks. This environment of sustained high oil prices is pushing bond yields higher and creating a potentially vicious cycle where rising yields amplify concerns about government debt and deficits, leading to further increases in yields. For instance, the U.S. 30-year Treasury rose to 5.278%, and at one point approached 5.3%, a level that previously prompted the Treasury Secretary to deploy a bond buyback scheme.
While there have been brief moments of relief, such as when oil prices retreated slightly after Iran's proposal for reopening the Strait of Hormuz, the underlying tension and its impact on oil prices remain a dominant factor. Some investors believe that bonds, which failed to act as a safe haven during the initial phase of the Iran war, may regain that role if escalating conflict leads to further supply disruptions and impacts global economic growth. However, the current environment necessitates a keen eye on energy markets for anyone investing in bonds.
