War Risk Insurance Crisis: How Marine Insurers Reacted to Iran Conflict in the Strait of Hormuz

When conflict with Iran escalated, the immediate pressure point for global trade wasn't a warship, but an insurance policy. Marine insurers began canceling war risk coverage for vessels transiting the critical Strait of Hormuz, sending premiums surging and threatening to freeze maritime traffic. This abrupt market reaction forced the Trump administration to intervene, announcing it would offer its own government-backed insurance to keep ships moving. The episode laid bare how the obscure, multi-layered world of shipping insurance acts as the first and most sensitive tripwire for geopolitical risk on the high seas.

The system's complexity is its defining feature. A single vessel requires a patchwork of separate policies: war risk, liability (known as Protection & Indemnity or P&I), and hull loss coverage, each handled by different entities. As explained by Dorothea Ioannou, CEO of the American P&I Club, and the club's reinsurance director Steven Ogullukian, insurers, reinsurers, and mutual insurance clubs form an interdependent chain. When war risk is withdrawn by primary insurers, it creates a domino effect, disrupting the entire risk-sharing model and leaving shipowners exposed.

The fallout extends far beyond premium costs. This insurance mechanism is a silent regulator of global commerce, determining which routes remain viable and which commodities can flow. A withdrawal of coverage doesn't just raise costs—it can effectively impose an unofficial blockade, as commercial operators cannot legally sail without it. The U.S. government's unprecedented move to become an insurer of last resort highlights the systemic fragility exposed by the Iran conflict, signaling that state power may increasingly be needed to backstop the private markets that underpin trillion-dollar trade flows.