War-risk premiums rise, but ocean hull insurance softens—IUMI warns

At the International Union of Marine Insurance (IUMI) annual conference in Rotterdam on 2026-09-24, Ilias P. Tsakiris, Chair of the Ocean Hull Committee, said the global ocean hull insurance market is continuing to soften even as the overall premium base appears to be growing. In parallel, a senior IUMI official warned that insurers have lost billions covering war risks for shipping tied to ongoing US–Iran conflict dynamics that underpin energy flows. The tension is that headline premium rates are rising, yet underwriting outcomes are deteriorating, implying that risk pricing is not fully translating into profitable risk transfer. Separately, IUMI elected Sean M. Dalton as President at a Council meeting in Rotterdam, with Frédéric Denèfle stepping down, signaling potential shifts in how the industry will frame and manage risk standards. Geopolitically, the key linkage is that maritime insurance is acting as a real-time barometer for strategic chokepoint exposure and energy-route vulnerability, even when the broader market shows “premium growth” on paper. The US–Iran conflict context matters because it shapes war-risk demand for vessels moving energy-related cargoes, particularly along routes that are sensitive to escalation risk and operational disruptions. While insurers are charging more in headline terms, the reported billions in losses suggest that claims frequency/severity, higher reinsurance costs, or coverage expansions are overwhelming rate increases. The election of a new IUMI President in Rotterdam adds an institutional variable: industry bodies can influence guidance, risk classification, and engagement with stakeholders, which can affect how quickly market practices adapt to conflict-driven risk. For markets, the immediate transmission mechanism runs through marine insurance pricing, reinsurance capacity, and shipping risk premia that can feed into freight rates and energy logistics costs. The articles point to ocean hull insurance softening, which typically pressures insurer margins and may encourage more competitive pricing in peacetime segments, even as war-risk lines remain strained. The US–Iran-linked war-risk losses imply elevated tail risk for insurers and reinsurers, which can raise the cost of capital for underwriting portfolios and affect credit spreads for insurance-linked vehicles. In the shipbuilding supply chain, the separate mention of Hanwha Ocean and HD Hyundai being locked in strike disputes—against a backdrop of a South Korea–US shipbuilding cooperation push—highlights labor and delivery-risk that can compound claims risk for newbuild projects and delay fleet deployment. What to watch next is whether IUMI’s leadership transition translates into tighter risk classification, clearer war-risk triggers, or new guidance for energy-route exposures. For underwriting, the critical indicators are the gap between headline premium rate increases and realized loss ratios, plus any changes in reinsurance terms for war-risk covers. For shipping and energy flows, monitor operational signals tied to US–Iran maritime risk—such as route deviations, port call disruptions, and any escalation that would widen the insured “war-risk” perimeter. Finally, in the shipbuilding supply chain, track whether strike disputes at major yards resolve quickly or spill into delivery schedules, because that can shift risk from construction to early operations and affect claims patterns over the next quarter.

Geopolitical Implications

• 01

  Maritime insurance underwriting is translating US–Iran conflict risk into measurable financial stress, reinforcing the role of insurance as a strategic chokepoint signal.

• 02

  If war-risk losses persist, insurers may narrow coverage or raise deductibles, effectively increasing the cost of energy-route operations and shaping shipping behavior.

• 03

  Industry governance changes at IUMI can accelerate or slow market adaptation to conflict-driven risk, affecting how quickly pricing and coverage frameworks respond.

Key Signals

• —Realized loss ratios vs headline premium rate changes in ocean hull and war-risk lines
• —Reinsurance treaty renewals for war-risk capacity and any exclusions/coverage perimeter changes
• —Operational indicators on Hormuz-adjacent routes (route deviations, port call cancellations, increased detention/claims)
• —Resolution status of strike disputes at major shipyards (Hanwha Ocean, HD Hyundai) and downstream delivery schedule impacts