Hormuz Blockade Traps Over 135 Million Barrels of Iranian Crude

The Strait of Hormuz is a critical maritime chokepoint in the global energy trade, through which approximately 20-21% of all globally traded oil passes. The Iranian oil tanker blockade has targeted this narrow passage, applying sustained enforcement pressure that has significant consequences for Iran's energy revenues and the global energy system.

The U.S. naval enforcement involves several mechanisms, including vessel interception at the outer boundary of the Gulf of Oman, redirection operations turning ships back toward Iranian waters, boarding actions on vessels suspected of carrying sanctioned Iranian crude under falsified documentation, and empty tanker restriction, preventing unladen vessels from returning to Iranian ports.

Data from Vortexa indicates that Iranian crude in floating storage has risen 14% over the past month, reaching approximately 135 million barrels as of early August 2026. This figure represents a substantial and growing volume of deferred export revenue.