The Insurance Weapon: How Commercial Risk Logic Became an Irregular Warfare Tool at Hormuz

Small Wars Journal | John Hatzadony

Iran effectively weaponized the global marine insurance system at the Strait of Hormuz, demonstrating a novel irregular warfare capability that closed the vital chokepoint commercially before any physical blockade. Following coordinated U.S.–Israeli airstrikes on February 28, 2026, war risk premiums surged fivefold, major insurers terminated existing coverage, and Lloyd’s Joint War Committee designated the entire Arabian Gulf a conflict zone, causing tanker traffic to collapse by over 80 percent. This disruption, distinct from physical destruction, involves the withdrawal of commercial preconditions like insurance coverage, making maritime operations financially unviable. The mechanism functions as a self-executing weapon system: commercial shipping cannot operate without insurance, and the Lloyd’s Joint War Committee (JWC)’s designations, driven by underwriting judgment, trigger prohibitive repricing and coverage expiry. This creates a persistent economic disruption from limited initial kinetic action, as seen previously in the Red Sea crisis where AWRPs rose 500 percent. The Hormuz incident scaled this concept by targeting limited bypass infrastructure and exploiting pre-existing market tightness in the VLCC fleet. This insurance weapon is replicable at other critical chokepoints like the Strait of Malacca and the Taiwan Strait, posing a significant threat to global trade.

Read Full Article →