Oil benchmarks jumped sharply in Asian trading after fresh U.S.-Iran hostilities raised concerns about interruptions to crude exports, with Tehran announcing the closure of the Strait of Hormuz on Sunday.
As of 20:05 ET (00:05 GMT), Brent futures for September delivery were trading at $78.46 per barrel, up 3.2%, while West Texas Intermediate (WTI) futures were trading at $73.83 per barrel, up 3.4%. Both contracts had already advanced by more than 4% over the prior week as tensions between the U.S. and Iran re-emerged.
The most recent price move followed Iran's escalation of missile and drone attacks to include Gulf states such as Qatar and the United Arab Emirates. Tehran said it had closed the Strait of Hormuz after a commercial vessel was hit, a development that immediately heightened concerns about the security of one of the world's most important energy shipping channels.
The United States disputed Iran's announcement. President Donald Trump stated that commercial shipping through the waterway remained open under U.S. protection. Despite that official position, shipping activity in the area slowed noticeably over the weekend, amplifying market anxiety that any sustained disruption could tighten global crude supplies.
The Strait of Hormuz is the main export route for crude from major Gulf producers, including Saudi Arabia, Iraq, Kuwait and the United Arab Emirates. The market reaction reflects the possibility that any prolonged interruption to flows could force refiners - particularly in Asia - to look for alternative sources of supply and could raise freight and insurance costs for tankers.
Market participants are also monitoring whether major oil producers might coordinate a response or whether strategic petroleum reserves could be tapped if supply disruptions intensify. The recent price moves have brought a geopolitical risk premium back into oil markets after a period in which that premium had eased, with diplomatic efforts to restore prior understandings between the U.S. and Iran appearing to have stalled.
Market context
Traders priced in the renewed risk against a backdrop of already-elevated volatility, with both Brent and WTI registering multi-percent daily gains in line with the escalating regional tensions. The combination of reported attacks, the claimed closure of a critical shipping lane and a precautionary slowdown in vessel movements helped drive the uptick in crude prices.