Post Segments
Insurance markets are not supposed to panic. Their entire craft rests on the premise that danger can be measured, priced, and absorbed. But when the United States and Israel launched coordinated strikes on Iran at the end of February, the atmosphere in the London marine market shifted noticeably from longstanding theory. Iranian retaliation quickly turned the Strait of Hormuz—the narrow channel through which roughly a fifth of the world’s oil passes—into a theatre of military risk for commercial shipping. None of this should have unnerved the insurers who specialise in war-risk cover. War is precisely what those policies are written to insure.
Yet this time felt different. The difficulty was not the existence of hostilities but the sudden deterioration in the information environment used to assess them. War-risk underwriting depends heavily on intelligence about missile capabilities, targeting patterns, naval movements, and the intentions of belligerents. When visibility into those factors weakens, the actuarial problem changes character. Risk can be priced; opacity cannot. That distinction would soon ripple through the world’s most famous insurance market, and before long the calm arithmetic of the Inside-Out Bulding began to look suspiciously like a polite stampede in pinstripes.
When the Market That Never Retreats Steps Back
The detail that startled shipping executives was not the existence of cancellation clauses. War‑risk policies always include them. Standard marine contracts allow insurers to terminate cover with seventy‑two hours’ notice when hostilities sharply increase the likelihood of catastrophic loss. The clause exists because war changes probabilities overnight.
Yet Lloyd’s built its reputation on something close to the opposite instinct. The London market is famous for insuring dangers that others refuse to touch. It covered convoys during both world wars, tankers sailing through the Persian Gulf during the Iran–Iraq “Tanker War” of the 1980s, and merchant shipping crossing mined waters in multiple conflicts. When danger rises, the traditional response in Lime Street is not retreat but repricing. Premiums rise sharply, special surcharges appear, and voyages continue.
That reputation for nerve is part of Lloyd’s commercial appeal. Shipowners expect the market to remain present even when risks escalate. Banks financing vessels assume coverage will remain available, albeit expensive. Charterers structure contracts around the expectation that London underwriters will price danger rather than abandon it.
The events surrounding the Hormuz crisis therefore felt unusual. Missile strikes on commercial vessels, Iranian threats to target shipping, and rapidly escalating military tension prompted a wave of seventy‑two‑hour cancellation notices across the marine insurance market. Policies covering transits through the Gulf evaporated in quick succession. The Joint War Committee expanded the region’s designation as a high‑risk listed area, and premiums that remained available climbed to extraordinary levels.
Ships cannot sail uninsured. Lenders will not finance voyages without hull and war‑risk coverage, and charterers refuse to place cargo aboard vessels lacking it. Within days the practical effect of the cancellations became visible on maritime tracking screens: tankers clustering outside the Strait of Hormuz, waiting for insurance that no longer existed.
The Intelligence Question
Inside the insurance community another explanation circulated quietly. Pricing war risk depends on information as much as on actuarial models. Underwriters rely on a steady stream of intelligence assessments, satellite imagery, maritime surveillance data, and threat reporting that originates within allied governments.
For decades the Five Eyes intelligence partnership, linking the United States, Britain, Canada, Australia, and New Zealand, has formed part of that ecosystem. Maritime threat assessments, signals intelligence concerning missile deployments, and naval surveillance data indirectly inform the way insurers model risk. The relationship rarely appears in public, yet experienced brokers know that London’s pricing power rests partly on privileged visibility into geopolitical hazards.
Voices in the market suggested that the quality of that visibility had deteriorated. Diplomatic friction between Washington and London, coupled with shifts in intelligence priorities, reportedly reduced the depth of information flowing into parts of the insurance community. Whether exaggerated or not, the perception mattered. Underwriters price risk only when they feel they understand it. When uncertainty becomes opaque rather than quantifiable, they prefer not to write the policy at all.
In that sense the cancellations signalled less a panic than a loss of confidence in the available information environment. The market that normally prides itself on seeing through the fog of war briefly concluded that the fog had grown too thick.
Trump’s Insurance Gambit
Washington reacted with the speed that energy security tends to produce. President Donald Trump instructed the U.S. International Development Finance Corporation (DFC) to assemble a federal maritime reinsurance facility worth roughly $20 billion to stabilise shipping through the Persian Gulf.
The structure of the program matters. The United States did not begin insuring tankers directly. Instead, the DFC created a government-backed reinsurance pool designed to sit behind private insurers. Commercial underwriters could resume issuing war‑risk policies for vessels transiting the Gulf knowing that catastrophic losses such as missile or drone strikes on tankers would be largely absorbed by the federal backstop.
The facility operates as a revolving coverage pool rather than a one‑off guarantee. As ships complete voyages or exposures expire, capacity returns to the program, allowing additional vessels to be insured. The scheme primarily supports two forms of marine cover essential to tanker operations: hull and machinery insurance for physical damage to vessels, and cargo insurance covering the oil and petroleum products moving through the strait.
Implementation required coordination across several parts of the U.S. government. The DFC provides the financial guarantee, the Treasury Department supervises financial structuring, and U.S. Central Command supplies the operational security picture for the region. The administration paired the insurance backstop with suggestions that the U.S. Navy could escort vulnerable tankers if attacks intensified. Insurance and deterrence, in other words, were designed to operate together.
The Economics of an Insurance Switch
The economic stakes are immense. Roughly twenty percent of global oil consumption passes through the Strait of Hormuz. Interruptions there ripple immediately through tanker freight rates, refinery input costs, and ultimately consumer fuel prices.
Insurance functions as the hidden switch governing this entire system. Oil can sit in a tanker ready to move, but without insurance the ship does not leave port. When war‑risk policies evaporate, global energy logistics freeze almost instantly. Trump’s reinsurance facility therefore operated less like a subsidy than like a circuit breaker: it restored the confidence necessary for voyages to resume and prevented a disruption in the Gulf from metastasising into a full‑scale energy shock.
But the policy carries implications for London. For generations, the City, and Lloyd’s in particular, has dominated the global market for marine war‑risk insurance. Trump’s intervention effectively inserted the U.S. federal balance sheet into a space historically controlled by the Corporation. In the short term, the American backstop stabilises the market and allows syndicates to resume writing policies under the shelter of sovereign reinsurance. In the longer term, it introduces a subtle shift in power. When Washington demonstrates a willingness to guarantee maritime risk directly, the gravitational centre of the insurance system begins to tilt toward the state that controls the sea lanes.
For the City of London the message is uncomfortable but unmistakable. The world’s premier insurance market has not been displaced, but its role is subtly shifting. Lloyd’s continues to supply the underwriting skill, the brokers, and the syndicates that structure the policies. Yet when the ultimate guarantee sits on the balance sheet of the United States, the architecture of the system begins to look American. The City remains the workshop of marine insurance; Washington increasingly looks like its strategic guarantor.
Economic Statecraft at Sea
Viewed strategically, the intervention belongs to a long American tradition. Washington frequently uses financial guarantees and insurance programs as tools of statecraft. War-risk insurance provided by the U.S. government during the twentieth century served precisely this purpose: sustaining commerce when private capital withdrew from conflict zones.
The Hormuz reinsurance facility follows the same logic. The federal balance sheet becomes an instrument of geopolitical stability. Shipping companies receive protection, energy markets remain functional, and adversaries discover that threatening a chokepoint does not automatically halt global trade.
The deeper point is that financial infrastructure can project power just as effectively as fleets. Control over the insurance mechanisms that enable trade allows a state to stabilise markets, reassure allies, and deny adversaries the leverage that comes from disrupting commerce. In that sense, while the DFC facility appears as an emergency measure for nervous insurers, it is truly an exercise in economic statecraft, using sovereign credit to keep a strategic artery of the global economy open.
A Strained Special Relationship
Intelligence cooperation still underpins much of this architecture. The Five Eyes partnership continues to exchange maritime surveillance data and threat assessments that inform naval operations and risk analysis alike. Yet the political atmosphere surrounding the alliance has grown colder.
Britain under Prime Minister Keir Starmer has managed the awkward feat of irritating Washington while appearing puzzled by the result. The contrast in governing style has become difficult to ignore. While the White House moved quickly, mobilising legal authorities, financial engineering, and strategic coordination to stabilise shipping, the British government looks painfully idle; overwhelmed by events and hesitant about its own role. Washington deploys brainpower and administrative skill; London speaks the language of caution and delay.
The Actuarial Moral
Insurance men rarely indulge in philosophical conclusions, yet this episode offers one. Markets can price danger, but they struggle to price uncertainty about the danger itself. Lloyd’s built its reputation on the idea that risk could always be calculated. When the information environment faltered, even that famously stoic market stepped aside.
Washington filled the gap with a sovereign guarantee and a reminder that sea lanes remain strategic assets. Empires once protected commerce with fleets alone. Modern ones now protect it with reinsurance.
In geopolitics, competence is the cheapest insurance policy. And hesitation the most expensive claim.
Bepi Pezzulli is a Solicitor in England & Wales and an Avvocato in Italy, specializing in crypto finance. His research interests include financial services policy; global risk governance; and economic statecraft. He analyzes the impact of policy, legislation, and case law on financial markets, financial regulation, financial architecture, financial stability, governance, and risk management.
