G7 nations absorb $16B in added debt costs from Iran war

Six months into the US-Iran war, the economic aftershocks are rippling across global markets. Crude oil prices remain more than 20 percent above pre-war levels, bond yields across the G7 have climbed to multi-decade highs, and analysts are warning that inflation risks are far from contained — even as some regions have so far weathered the storm better than expected.

Oil Markets Under Pressure

Since the United States and Israel launched strikes against Iran on February 28, oil markets have been volatile. International benchmark Brent crude has risen more than 20 percent from pre-war levels, with prices reaching above $91 per barrel in mid-August after President Donald Trump cast doubt on a ceasefire deal with Iran. As of early August, oil was up roughly 16 percent compared to before the conflict began, according to Al Jazeera. Gas prices for American consumers have jumped 36 percent since the war started, with the national average reaching $4.06 per gallon. The Strait of Hormuz, a critical chokepoint for global energy and fertilizer trade, remains partially disrupted, with diplomatic talks between the US and Iran stalling over competing demands.euronews+3

Bond Yields and Fiscal Strain

The conflict's inflationary impulse has compounded a broader bond market selloff. According to the Financial Times, G7 nations have locked in an additional $16 billion in sovereign debt financing costs since the war began, as rising yields increase the price governments pay to borrow. In the United States, 30-year Treasury yields have surged to their highest level since 2001. Analysts at CNBC attribute the move to a combination of fiscal deficit concerns, persistent inflation above the Federal Reserve's 2 percent target, and a wave of corporate debt issuance tied to AI investment competing with government bonds for investor demand. The World Economic Forum noted that yields on long-dated government bonds hit multi-year highs in August.cnbc+3

GCC Resilience, Global Vulnerability

In the Gulf, inflation has remained relatively contained. Dubai's Consumer Price Index rose 5.3 percent year-on-year in July, easing from a 5.7 percent peak in June, while Saudi Arabia's annual inflation stayed below 2 percent at 1.8 percent, according to Kamco Invest's latest GCC inflation report published by Khaleej Times. Oman recorded the highest GCC inflation at 3.2 percent. Yet the outlook carries risks. The World Bank has warned that fertilizer prices could rise more than 30 percent in 2026 if Strait of Hormuz disruptions persist, with urea prices having already jumped 53.7 percent in March to their highest level in four years. The bank's April 2026 Commodity Markets Outlook flagged that roughly one-third of globally traded fertilizer volumes were removed from the market by the disruption. Sub-Saharan Africa faces the greatest vulnerability to prolonged high fertilizer costs due to low fertilizer use and limited fiscal capacity.khaleejtimes+3

The New York Times reported that the war has "locked into a fragile holding pattern," with oil flowing again but in reduced volumes and at elevated prices. Whether that pattern holds — or breaks toward renewed escalation — will determine how far inflation fears travel from here.nytimes