Insurance, Shipping and Maritime Risk

Global trade moves by sea. Nearly 90 per cent of world trade by volume is transported across oceans, carried by fleets of container ships, oil tankers and bulk carriers connecting production centres to global markets across routes that have defined the economic geography of the modern world since the age of steam. These maritime corridors form the backbone of the global economy in the most literal sense: remove them and the industrial supply chains that sustain modern life begin to fail within weeks. Yet their vulnerability is systematically underestimated, because it does not manifest as a sudden collapse. It manifests as a gradual repricing of risk, and repricing is the kind of change that registers first in insurance markets, then in freight rates, then in commodity prices, and finally, months or years later, in the consumer price indices that governments and central banks are measured against.

Shipping is only one part of the maritime system. Behind every vessel lies a complex network of insurers, reinsurers, brokers and financial institutions that make global trade operationally possible. Without insurance, ships cannot operate commercially. Ports will not accept uninsured vessels. Cargo owners cannot absorb the catastrophic risk of loss at sea. Lenders will not finance vessels without the security of comprehensive coverage. Maritime insurance therefore functions as the critical enabling layer of global commerce, and it does something that the physical infrastructure of ports and shipping lanes cannot do: it transforms uncertainty into calculable, priced and transferable risk.

The global marine insurance market is dominated by a relatively small number of underwriting centres, principally Lloyd's of London and the major European and American insurance markets. This concentration is not merely a commercial fact. It is a geopolitical one. When these markets designate a region as high-risk, or exclude it from standard coverage, the effect is not simply an increase in cost for the operators who use that route. It is a de facto restriction on the movement of goods through that zone, as effective in practical terms as any physical blockade, but achieved through pricing rather than force. The power to classify maritime risk is a form of geopolitical power that has received far less analytical attention than it deserves.

The impact of maritime conflict risk is concentrated at strategic chokepoints: the narrow passages and canal systems through which a disproportionate share of global trade must flow. These locations have always been strategically significant. What is new is the degree to which their disruption translates directly and rapidly into measurable economic consequences at global scale, transmitted through the insurance pricing mechanism before any physical disruption has necessarily occurred.

The Houthi attacks on commercial shipping in the Red Sea that escalated sharply from late 2023 onward provide the most comprehensive real-world case study of how maritime conflict risk translates into economic consequences across the global trading system. The direct military threat was operationally significant but geographically contained: drone and missile attacks on vessels transiting the Bab el-Mandeb strait and the broader Red Sea corridor. The economic consequences, however, were global and immediate.

Major container shipping companies including Maersk, MSC and CMA CGM suspended Red Sea transits and rerouted vessels around the Cape of Good Hope. This diversion adds approximately 10 to 14 days to voyages between Asia and Europe, increases fuel consumption by 30 to 40 per cent per voyage and requires additional vessel capacity to maintain the same service frequency. Container freight rates on the Asia-Europe route surged in response. War risk insurance premiums for Red Sea transits rose sharply from their pre-crisis baseline. The Lloyd's Joint War Committee expanded its listed areas to include the Red Sea and Gulf of Aden, triggering automatic additional premium charges for any insured vessel transiting those zones. Shipping companies that chose to continue operating through the corridor faced insurance surcharges that, in some cases, doubled or trebled the cost of a single voyage.

As with financial sanctions, sustained maritime risk has produced alternative systems. The emergence of the shadow fleet, documented extensively elsewhere in this edition, is in part a direct response to the exclusion of sanctioned cargo from standard Western insurance markets. When Lloyd's of London and other major underwriters refuse to cover Russian oil shipments, the economic incentive to create alternative insurance arrangements becomes overwhelming for the parties involved. State-backed Russian insurance pools, opaque offshore mutual arrangements and flag-of-convenience registries in jurisdictions with minimal oversight have collectively created a second tier of maritime operations that functions in parallel with the regulated global shipping network.

This two-tier system creates distinct risk profiles. The regulated tier operates with comprehensive insurance, credible safety standards, transparent ownership and flag-state oversight. The shadow tier operates with alternative or minimal insurance, variable safety standards, obscured ownership through shell company structures and flags from jurisdictions that either cannot or will not enforce international maritime conventions. The economic consequence is a redistribution rather than an elimination of risk. The risks that major insurers decline to carry do not disappear. They are absorbed by less capitalised, less transparent and less regulated entities whose failure, in the event of an incident, imposes costs on the maritime environment, on affected coastal states and on the cargo owners whose goods are stranded without recourse.

Energy markets are the sector most directly exposed to maritime disruption, because the physical infrastructure of oil and gas transportation is structurally dependent on a small number of specific routes and chokepoints. Oil tanker voyages from the Persian Gulf to European and Asian markets must pass through either the Strait of Hormuz or the Suez Canal and Red Sea corridor. Neither route has a viable long-haul alternative for the volumes involved. When either corridor is disrupted, the effect on oil prices is transmitted almost immediately through futures markets, before any physical disruption to actual deliveries has necessarily occurred. The price discovery mechanism of commodities markets is exquisitely sensitive to maritime risk signals, because traders are continuously pricing the probability of future supply disruption rather than simply the cost of current delivery.

Higher shipping costs on energy routes translate into higher energy costs for importing economies. Higher energy costs translate into higher production costs across every energy-intensive industry. Higher production costs translate into inflationary pressure, which constrains monetary policy and fiscal space simultaneously. This transmission chain means that a localised conflict affecting a specific maritime corridor can produce macroeconomic consequences for economies that have no direct stake in the conflict, no physical proximity to the affected route and no ability to influence the outcome through their own policy choices. It is a form of economic contagion that operates through geography rather than finance, and it is structurally resistant to the policy tools that central banks and finance ministries have available to address it.

One of the most consequential features of modern maritime conflict is its financial dimension. Risk is no longer only physical: a vessel damaged or lost, a port disrupted or closed. It is priced, traded and distributed through insurance markets and derivative instruments in ways that translate geopolitical tension into economic cost with a speed and breadth that the underlying physical events alone could not generate. Decisions about shipping routes are shaped not just by geography and the operational assessment of physical threat but by cost calculations determined by insurance markets, freight derivatives and the capital allocation decisions of financial institutions whose exposure to maritime risk is measured in balance sheet terms rather than vessel counts.

This financialisation creates both resilience and fragility. Resilience, because the distribution of risk across deep capital markets reduces the probability that any single event will produce catastrophic concentration of loss. Fragility, because financial markets can reprice risk faster than physical trade patterns can adjust, creating periods of acute economic disruption during which shipping companies, cargo owners and end consumers all absorb costs simultaneously before the underlying trade flows have had time to adapt. The Red Sea crisis demonstrated this dynamic precisely. Insurance markets repriced the route within days of the initial attacks. Physical trade rerouting took weeks. The economic costs of that gap were distributed across supply chains that had no direct involvement in the conflict and no mechanism for influencing its resolution.