Iran conflict deepens global oil supply squeeze

Global oil markets are confronting a severe disruption as hostilities surrounding Iran curtail movements through vital maritime chokepoints. Traffic through the Strait of Hormuz, a major conduit for seaborne oil, has collapsed to a small fraction of prewar activity. Recent data cited in market coverage show only 16 vessels passing through Hormuz over a Monday–Tuesday period, compared with roughly 120–140 daily transits before the conflict.

Much of the crude that does move through the area is doing so in increasingly hazardous conditions, with tankers navigating routes exposed to attack. The sharply reduced flow from Gulf producers is a central driver of the current tightness in physical supply and is limiting the ability of the market to respond to demand.

The turmoil is not confined to Hormuz. Renewed hostilities and attacks on shipping, including incidents in the Bab el‑Mandeb and Gulf of Oman, have broadened the disruption across key routes linking Middle East exporters to global buyers. These attacks have raised operational risks for shipowners and complicated logistics for refiners and traders.

U.S. military measures have added another layer to the evolving situation. Military forces have enforced restrictions around Iranian ports and shipping lanes, disabling a vessel that attempted to breach the blockade and redirecting multiple commercial ships. These steps have tightened controls over which vessels can move in and out of the region, further constraining normal trade flows.

The combination of constrained supply routes and rising security risks has translated into marked volatility in oil prices. International benchmark Brent crude (UKOIL) traded within an unusually wide range of almost $40 a barrel in July, reflecting rapid shifts in expectations as diplomatic positions on the conflict changed.

Despite periods of sharp swings both higher and lower, Brent was recently quoted just under $90 a barrel in mid‑August coverage. This price level suggests that concerns about physical availability and inventory drawdowns are being balanced against signs of demand pressure from the broader global economy.

Against this backdrop, the International Energy Agency has materially revised its medium‑term supply expectations. The latest outlook shows global oil supply averaging about 102 million barrels per day in 2026. This implies a full‑year decline of roughly 4.3 million barrels per day in that year’s supply profile.

The downgrade underscores how sustained disruptions and investment uncertainty are feeding into longer‑term planning. With trade routes under strain and flows from key producers constrained, the supply picture out to 2026 now appears tighter than previously anticipated, reinforcing sensitivities in prices to any further shocks in the region.