Iran war adds $49 to oil as inflation heads to 4.5%

The Iran war has added $49 a barrel to global oil prices through the simultaneous disruption of the Strait of Hormuz and the Red Sea, pushing inflation toward 4.5% and forcing a complete repricing of monetary policy.

"The dual blockade has removed roughly 15% of global oil supply from accessible shipping lanes, a disruption without modern precedent," said Ziad Daoud, chief emerging markets economist at Bloomberg Economics.

Brent crude traded above $90 a barrel this week, up more than 30% since the conflict erupted in late February. The Strait of Hormuz, which handled about 20% of global energy flows, remains largely blocked, while the Houthi blockade of Saudi vessels through the Bab el-Mandeb has severed the primary alternative route. Saudi Arabia had boosted west coast exports to about 5 million barrels a day since March, more than double prewar levels, with roughly four-fifths transiting through Bab el-Mandeb — a workaround that is no longer viable.

The supply shock is reshaping the global inflation and policy outlook. Bloomberg Economics estimates global inflation will reach 4.5% by the fourth quarter of 2026, up from 3.1% a year earlier. Markets have shifted from pricing Federal Reserve rate cuts to pricing nearly two rate increases, a reversal that compounds the economic drag from higher energy costs.

Supply disruption deepens as reserves dwindle

The U.S. Strategic Petroleum Reserve has fallen to about 315 million barrels, the lowest since March 1983, as the government releases 750,000 to 1 million barrels a day to buffer the economy. The reserve had an authorized capacity of more than 700 million barrels. North Dakota's benchmark oil price reached $100.64 a barrel in May, more than 70% above the state's revenue forecast of $59, while production of 1.12 million barrels a day fell slightly short of projections.

Global oil demand fell nearly 5% in the second quarter from a year earlier to 99.1 million barrels a day, according to the International Energy Agency, as consumers in Asia and Europe cut consumption. Chinese refiners slashed processing rates by 18% in June compared with the same month in 2025, pushing output to the lowest since the early days of the pandemic. European diesel consumption dropped 5.7% in May from a year earlier.

The demand destruction is concentrated in fuel products rather than crude itself. European diesel prices and U.S. gasoline prices have both gained about 65% since the start of the war, compared with a 30% rise in Brent crude, as refining capacity constraints amplify the impact of crude supply losses. Ukraine's drone attacks on Russian refineries have removed another key source of diesel from global markets, forcing Moscow to ban exports.

A dangerous new phase for the global economy

The simultaneous disruption of Hormuz and Bab el-Mandeb threatens the only viable alternative route that kept Middle Eastern oil moving after the first chokepoint was blocked. Vessels carrying Saudi crude to Asia are now avoiding Bab el-Mandeb entirely, crossing the Suez Canal into the Mediterranean and circumnavigating Africa — a detour that adds at least four weeks to a typical tanker journey and more than doubles shipping costs.

World Bank chief economist Indermit Gill said the conflict could cut 2026 global growth to as low as 1.3%, from 2.9% last year. The last time the global economy faced a comparable oil supply shock was during the 1990-91 Gulf War, when Iraq's invasion of Kuwait removed about 4.3 million barrels a day from markets. The current disruption is larger in scale and involves two chokepoints simultaneously, leaving the world with far fewer shock absorbers than it had in February.

For the Trump administration, which entered office seeking cheap energy and lower interest rates, the war has produced the opposite outcome. The president's decision to escalate military action against Iran has eliminated any prospect of the rate cuts that markets had expected at the start of 2026. Consumers now face the combined pressure of rising fuel costs and higher borrowing costs, a stagflationary dynamic that historically has been among the most difficult for central banks to manage.

This article is for informational purposes only and does not constitute investment advice.