War Insurers Urge Ship Owners to Halt Hormuz Transits After Attacks

War risk insurers are telling shipowners to temporarily halt transits through the Strait of Hormuz following a series of attacks in the critical waterway, sources familiar with the matter told Reuters. The guidance marks a significant escalation in concern among the specialized underwriters who price the cost of moving cargo through one of the world's most strategically sensitive chokepoints.

The Strait of Hormuz, a narrow passage between Iran and Oman, carries roughly one-fifth of the world's oil supply, making any sustained disruption there a major threat to global energy markets. Insurers advising pauses — even informally — signals that the threat environment has deteriorated to a point where underwriters view active transits as carrying unacceptable near-term risk.

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War risk premiums for vessels operating in the Gulf region had already been climbing in recent months as tensions flared, and fresh attack incidents appear to have prompted the more direct guidance from some underwriters to their clients. Such advice does not carry the force of a policy exclusion but can effectively pressure shipowners into rerouting or delaying sailings to avoid voiding coverage terms.

The ripple effects of reduced Hormuz traffic could tighten global oil supply chains and push freight rates higher across multiple commodity sectors. Energy traders and shipping operators are closely monitoring whether the advisory posture from insurers hardens into formal exclusions, which would dramatically raise the cost — or eliminate the feasibility — of commercial voyages through the strait.

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