Writers 
The conflict between the United States and Iran has turned from a regional security threat into a prolonged conflict. Its economic impact is reverberating in the energy sector, international trade, transport, inflation and financial markets. Diplomatic efforts are ongoing as of September 26, 2026, but the situation is still highly uncertain, especially in the Strait of Hormuz, which is one of the world's most vital energy and shipping routes.
Oil is one of the major economic issues. The Strait of Hormuz is an important shipping channel for transporting energy from the Persian Gulf. The fighting has dramatically slowed down traffic on the waterway. Reuters reported that just 17 vessels of any kind of commodity type transited the strait over one weekend, whereas the average in pre-war times was around 125 vessels per day.
Global oil prices can go up if the flow is disrupted, as markets worry about shortages. Brent crude is trading around or above $100 per barrel these days, and has even dropped when investors heard that diplomatic efforts may be renewed to open the strait again. This volatility presents issues for governments, businesses and consumers making spending plans.
An increase in oil prices may impact virtually all areas of the economy. Fuel costs for transportation companies are higher, energy prices are higher for manufacturers, and machinery, fertilizer and transportation expenses are up for farmers. A very long war could lead to rising food, fuel and other commodity prices as business is forced to pass some of these costs to consumers.
Another big casualty is international trade. Disruptions in the Gulf have risen shipping rates, insurance costs and delivery time. Businesses reliant on shipment traffic in the region can suffer delays, and may need to look for other transportation options that might cost more. The anarchic situation in the Strait of Hormuz has been reported recently.
The developing countries may be the ones that are hit hardest. Many developing countries are highly reliant on imported energy and have limited financial space for sudden price rises. The IMF has cautioned that the war impact is most severe on energy importers and fragile economies. Even more difficult economic conditions may prevail for countries already facing inflationary pressure due to rising energy costs.
Uncertainty also has an impact on financial markets. Investors might be less inclined to invest, companies might postpone their investments, and governments could have to pay more for their energy supports or security. Inflation could also prove to be a problem for central banks if growth and inflation start to go in opposite directions.
But, the world economy has shown some resilience. The IMF July 2026 projection was for world growth of 3.0% in 2026 and 3.4% in 2027, with the war shock having a differential impact on energy importers and vulnerable economies.
How long the conflict lasts and whether the Strait of Hormuz can resume normal activity will have critical impact on the ultimate economic consequences. Diplomacy is under way to reopen the waterway and end the conflict, but is uncertain.
Thus, the war between the US and Iran is a good example of the interdependence of the modern economy. The price of fuel, the cost of food, shipping, investment and inflation can all be affected thousands of kilometres away from a conflict that is focused in one area. The geopolitical stability and economic stability go hand in hand, and one conflict can have repercussions throughout the global economy.