Strait of Hormuz Closure Threatens Global Oil Supply and Fuels Inflation Fears

The Strait of Hormuz, a critical chokepoint for global oil shipments, is at the center of escalating tensions following a joint military operation by the United States and Israel against Iran. Iran has reportedly closed the Strait to navigation, prompting oil majors and trading houses to suspend shipments, raising concerns about potential disruptions to the global energy supply and a surge in oil prices.

Strategic Importance of the Strait of Hormuz

The Strait of Hormuz, situated between Iran and Oman, is a narrow waterway approximately 50 kilometers (30 miles) wide. It serves as a gateway to the Gulf and connects to the Indian Ocean. Approximately 20% of the world’s oil supply, originating from producers like Saudi Arabia, the UAE, Iraq, Kuwait, and Iran, passes through this vital transit route, along with substantial volumes of liquefied natural gas (LNG) from Qatar [1]. Its narrowness and shallow waters create it vulnerable to disruption.

Iran’s Response and Shipping Disruptions

In response to the US-Israel attack, Iran has reportedly closed the Strait of Hormuz to all navigation. Several tanker owners, oil majors, and trading houses have already suspended crude oil, fuel, and LNG shipments [3]. Satellite images show vessels accumulating near ports like Fujairah in the United Arab Emirates, unable to proceed through the Strait [1]. The Iranian Revolutionary Guards have reportedly issued VHF transmissions prohibiting ship passage [1].

International Response and Concerns

The UK Navy has stated that Iran’s orders are not legally binding but advises vessels to transit with caution. The U.S. Navy has warned against navigation in the Gulf, Gulf of Oman, North Arabian Sea, and the Strait of Hormuz, citing safety concerns [1]. Greece’s shipping ministry has advised vessels to avoid the Persian Gulf, Gulf of Oman, and the Strait of Hormuz [1]. At least fourteen LNG tankers have slowed down, altered course, or stopped in or around the Strait, potentially impacting Qatari LNG exports [1].

Potential Economic Impact

The closure of the Strait of Hormuz could have significant economic repercussions. Historical analysis suggests that a 1% reduction in oil supply can lead to a 4% increase in prices [2]. While Washington is now a major energy producer, a substantial surge in oil prices could still fuel inflation and have political consequences. Oil prices briefly rose to nearly $80 a barrel after a previous Israeli attack on Iran in June 2025, but gains were short-lived when key regional oil infrastructure remained undamaged. Brent crude was trading at $72.98 on Friday, February 28, 2026, and the market’s reaction on Monday will be closely watched.

China’s Concerns

China, a major importer of Iranian oil, has called for an immediate cessation of military operations [4]. Disruptions to oil flows through the Strait of Hormuz would also negatively impact the Chinese economy.

Even without a formal closure, threats, seizures, or attacks on energy infrastructure in the Gulf could trigger an immediate price increase, impacting global markets.