Global Bond Markets Decline as Iran Conflict Escalates, Oil Rises on Supply Fears

Global bond markets reversed recent gains on March 3, 2026, as fresh military escalation in Iran sent shockwaves through financial markets. Following coordinated airstrikes in central Tehran on March 2, which damaged multiple government and infrastructure sites, investor sentiment shifted sharply toward risk aversion. The U.S. 10-year Treasury yield climbed to 4.82%, up 12 basis points in a single session, signaling strong selling pressure across sovereign debt. The VIX index, a key measure of market volatility, jumped to 31.7, its highest level since late 2023. Energy markets reacted forcefully, with Brent crude futures rising to $94.30 per barrel, a 6.2% increase from the previous close. The surge was driven by fears of potential disruptions to oil flows from the Strait of Hormuz, a critical maritime chokepoint. U.S. crude futures (CL=F) also climbed to $89.80, reflecting heightened supply risk. The Defense sector gained momentum, with Lockheed Martin (LMT) and Raytheon Technologies (RTX) shares rising 3.4% and 2.9% respectively, as investors anticipated increased defense spending amid the geopolitical flare-up. The sell-off in bonds has widened the spread between U.S. Treasuries and high-grade corporate debt, with investment-grade spreads widening by 15 basis points. This suggests growing concerns about inflationary pressures returning to the global economy. With central banks already cautious about premature rate cuts, the renewed geopolitical risk complicates monetary policy planning. Market participants are now pricing in a higher likelihood of extended rate-holding periods, particularly in the U.S. and Europe.