How War with Iran Could Disrupt Energy Exports at the Strait of Hormuz

Escalating Middle East tensions underscore the critical vulnerability of the Strait of Hormuz, a chokepoint for approximately 15 million barrels per day of crude and significant global LNG and refined product flows. While a full Iranian-imposed closure is deemed unlikely unless Tehran's own exports are cut off, the greater risk lies in covert attacks via mines or fast-attack craft. Given limited bypass pipeline capacity, even partial disruptions or heightened risk perception could severely impact global oil and gas supply, posing significant energy security concerns for markets.

Analysis

Escalating geopolitical tensions in the Middle East present a severe and quantifiable risk to global energy markets centered on the Strait of Hormuz. This critical chokepoint facilitates the daily transit of approximately 15 million barrels of crude oil, over 4 million barrels of refined products, and 11 billion cubic feet of LNG. While OPEC holds 4–5 million barrels per day (mb/d) of spare production capacity, its utility is severely diminished in a closure scenario as this supply is primarily located upstream of the strait. Bypass infrastructure offers only a fractional solution; Saudi Arabia's East-West Pipeline has only an estimated 2.7 mb/d of spare capacity, insufficient to reroute even its own typical 5.4 mb/d of Gulf exports, and the UAE can only divert about half of its 2 mb/d of at-risk exports. A complete, Iranian-led shutdown is deemed a low-probability event, contingent on a retaliation scenario where Iran's own 1.5 mb/d of exports are first eliminated. The more probable threat stems from covert, deniable attacks on shipping using naval mines or fast-attack craft, which could trigger widespread avoidance of the strait by commercial vessels, effectively disrupting global supply chains and introducing significant price volatility even without a full blockade.

Key Decisions for Investors

• Consider positioning for heightened oil price volatility, as the limited effectiveness of bypass pipelines and inaccessible spare capacity means even minor disruptions could have an outsized impact on spot prices.
• Monitor any military or political actions targeting Iran's oil export infrastructure, such as the Kharg Island facility, as this is the primary identified catalyst that could trigger a worst-case retaliation and a full strait closure.
• Evaluate exposure in sectors highly dependent on global shipping and stable energy costs, as the secondary economic impacts of a Hormuz disruption would extend far beyond energy producers.
• Differentiate risk pricing between a low-probability full closure and a higher-probability campaign of covert attacks, as the latter poses a more immediate and persistent threat to shipping insurance rates and tanker availability.