US-Iran Tensions Escalate, Fueling Global Bond Market Sell-Off and Inflation Fears

Escalating military confrontations between the United States and Iran in the Middle East are sending disruptive signals across global financial markets. Renewed US airstrikes on Iranian military targets near the Strait of Hormuz, met by Iranian retaliatory strikes on American interests, have significantly intensified geopolitical risks. This ongoing exchange of fire follows a broader conflict that began in February 2026, involving US-Israeli operations against Iranian infrastructure and regional allies.

The heightened tensions are primarily fueling a widespread sell-off in global bond markets, driving up yields to multi-year and even multi-decade highs. For instance, the 10-year US Treasury bond yield recently approached a three-year peak, and the 30-year yield reached its highest level since 2007, reflecting investor concerns over persistent inflation and increasing government deficits. This rise in borrowing costs is also impacting other major economies, including the UK, Japan, and European nations.

A significant consequence of the escalating conflict is the surge in global oil prices, with Brent crude climbing to five-week highs around $95 a barrel. This sharp increase in energy costs is stoking fears of higher inflation, which, in turn, is leading markets to anticipate that central banks may need to maintain or raise interest rates further rather than ease monetary policy. Consequently, global stock markets have experienced declines as investors react to the combination of geopolitical uncertainty, rising inflation prospects, and increasing bond yields.