The economic consequences of the US-Israeli war with Iran are becoming the central concern at this week’s International Monetary Fund and World Bank meetings in Bangkok. The conflict has disrupted fuel supplies from the Middle East and strained trade through the Strait of Hormuz, turning a geopolitical crisis into a test of global economic resilience.
The immediate transmission channel is energy. Oil prices have climbed above $100 a barrel, while energy-price inflation reached 18.8% in September, up from 14.3% a month earlier, according to Le Monde. Higher fuel costs raise transport and production expenses, squeeze household budgets and threaten to keep inflation elevated even as economies slow.
A shock arriving at the worst time
The world economy is entering this crisis with limited room for policy mistakes. The IMF expects global growth of about 3% in 2026, but its research warns that sudden food and energy-price spikes increasingly create longer-lasting inflation expectations, deepen poverty and undermine economic stability, according to Reuters.
That combination creates a dilemma for central banks. Raising interest rates can restrain second-round inflation, but it also makes mortgages, business loans and government refinancing more expensive. Keeping rates lower may support demand, yet risks allowing an energy shock to become embedded in wages and prices. The choice is especially difficult when the original cause of inflation is a supply disruption that monetary policy cannot directly repair.
Markets are already reflecting that tension. The US 10-year Treasury yield was reported at 5.237%, while Brent crude remained near $103 a barrel after briefly rising further on fears of an expanded conflict, according to Rio Times. High yields raise the government’s interest bill and reduce the value of future corporate earnings, helping explain why technology shares and other risk assets have become more vulnerable despite continuing enthusiasm about artificial intelligence.
Debt is the second pressure point
The energy crisis is colliding with a debt burden that was already approaching historic levels. The IMF says global public debt is at its highest level since the Second World War and is expected to exceed 100% of world GDP before 2030. Developing countries face an especially severe squeeze: together, they are due to make roughly $400 billion in external debt payments during 2026, while interest payments already consume more than 10% of government revenue on average, Reuters reported.
For wealthy governments, borrowing costs complicate efforts to shield consumers through fuel subsidies, tax cuts or emergency transfers. For poorer countries, the choices are harsher. Governments may have to reduce investment in health, education and infrastructure precisely when higher food and energy prices are increasing social pressure.
Debt relief advocates argue that the crisis demonstrates the need for faster restructuring and more concessional finance. Creditors, however, face their own political constraints and may resist broad write-downs, particularly when governments have not established credible fiscal reforms. The dispute is therefore not only about money; it is about who should absorb the cost of a shock neither borrowers nor lenders fully control.
What comes next
The most consequential variable is the conflict’s duration and its effect on the Strait of Hormuz. A short disruption could allow oil markets to stabilize, especially if alternative supplies and strategic reserves cushion the initial blow. A prolonged interruption would create a more dangerous feedback loop: higher energy prices would lift inflation, elevated interest rates would weaken investment, and slower growth would make debt harder to service.
Political decisions will determine whether that scenario materializes. US officials are balancing military objectives against domestic pressure over fuel prices, while European governments face demands for household support despite already strained budgets. Washington has also discussed securing additional diesel supplies, including a reported agreement involving Russia, illustrating how energy insecurity can reshape diplomatic relationships as well as commodity markets.
The immediate policy priority is targeted protection rather than open-ended subsidies: assistance for vulnerable households, transparent emergency financing for poorer states and measures that preserve energy supplies without permanently distorting prices. Longer term, the crisis strengthens the case for diversifying energy sources and reducing dependence on vulnerable shipping routes.
The broader lesson is that today’s global economy is less resilient than headline growth figures suggest. War, debt and inflation are not separate risks. They reinforce one another. If diplomacy contains the conflict, the shock may remain manageable. If it spreads, governments will discover that the world’s most expensive resource is not oil but policy space.