War risk premiums for Strait of Hormuz transits have surged from a pre-crisis baseline of roughly 0.08% to as high as 1% of hull value — a near-12-fold explosion in cost that is quietly strangling global energy trade, even as President Trump promises an insurance backstop through the U.S. Development Finance Corporation.

The Quote That Stops a Ship

Imagine you are the operations director of a midsize Greek tanker company. Your very large crude carrier — a VLCC laden with two million barrels of Saudi crude, worth roughly $160 million at today’s prices — is sitting at anchor in the Gulf of Oman. It was bound for Ningbo. Your broker in London calls Tuesday morning. The hull war risk premium to transit the Strait of Hormuz, if you can get one at all, has just hit 1% of the vessel’s insured value — for a single seven-day period. On a ship valued at $120 million, that is $1.2 million. For one voyage. Last month, the same premium was $96,000.

You tell the captain to hold position.

That decision, replicated by hundreds of operators across the global tanker fleet since the United States and Israel launched joint strikes against Iran on February 28, 2026, is the quiet mechanism behind the most severe disruption to global energy flows since the 1979 Iranian Revolution. It is not missiles or mines that have effectively closed the Strait of Hormuz — it is a spreadsheet, a reinsurer’s risk model, and a 12-fold surge in the price of a specialized insurance policy that most people have never heard of.

The Surge Explained: From 0.08% to Uninsurable

War risk insurance is the unglamorous but indispensable plumbing of global trade. Standard marine policies exclude losses arising from armed conflict; a separate war risk policy fills that gap, and without it, port authorities refuse entry, charterers void contracts, and banks decline to finance cargo. As David Smith, head of marine at insurance broker McGill & Partners, put it bluntly: if you walked into the hull war market right now and said you had a tanker bound through the Strait of Hormuz, there is a genuine possibility you would struggle to find any underwriter prepared to quote terms at all.

The numbers behind the collapse are stark. Before the U.S.-Israeli air campaign against Iran began — what American planners have codenamed “Operation Epic Fury” — war risk premiums for Persian Gulf transits sat at roughly 0.08% to 0.1% of a vessel’s insured hull value on a standard seven-day basis, a baseline consistent with the relatively stable threat environment that followed the 2025 Houthi ceasefire. By March 3, 2026, premiums had surged to as much as 1% of vessel value, even for ships not planning to breach the Strait itself — and underwriters were in some cases declining to quote at all. For a VLCC valued at $120 million, that translates into a single-voyage war risk bill of $1.2 million, versus roughly $96,000 three weeks ago.

The structural driver of this repricing is reinsurance. London’s wholesale marine market does not carry that exposure on its own books — it cedes most of the risk upward to a small group of global reinsurers. When those reinsurers withdrew their support for Gulf war risk extensions in the 72 hours following the February 28 strikes, the primary market followed instantly. The Joint War Committee of Lloyd’s Market Association moved swiftly to expand its list of designated high-risk areas to include Bahrain, Djibouti, Kuwait, Oman, and Qatar — a designation that automatically triggers reset clauses in thousands of charter party agreements and financing contracts worldwide.

The Insurer Exodus: A 72-Hour Cancellation Wave

The mechanics of what happened over March 1 and 2 deserve examination, because they reveal a structural vulnerability that no political guarantee — however loudly announced — can easily override.

All 12 members of the International Group of P&I Clubs, the mutual insurance cooperatives that together cover liability risks for approximately 90% of the world’s ocean-going merchant fleet, simultaneously issued 72-hour notices of cancellation for war risk extensions attached to their Gulf policies. Among the prominent names announcing cancellations effective March 5: Gard, Skuld, NorthStandard, the London P&I Club, and the American Club. Japan’s MS&AD Insurance Group separately suspended new underwriting across a broader range of war risk policies covering waters near Iran, Israel, and neighboring countries.

Skuld stated it was working on a buy-back option to reinstate cover at higher premiums. But the key phrase is “higher premiums” — the market was not withdrawing because the risk was uninsurable in principle. It was withdrawing because reinsurers needed to reset pricing to a level that reflected a genuine war environment, not a residual geopolitical tension premium. The parallel to 2022 is instructive: after Russia invaded Ukraine, insurers cancelled Black Sea war risk extensions before new cover was eventually negotiated — at vastly higher cost — as grain exports resumed months later under new terms. The Hormuz situation is structurally similar, but geographically more consequential.

What distinguishes this moment from previous Gulf shipping crises is the breadth of the insurer pullback. During the 1987–1988 Tanker Wars, the market stayed open — pricing adjusted but never fully closed. Today, the combination of advanced Iranian drone technology, demonstrated willingness to target vessels from multiple flags, and an IRGC commander’s declaration that the Strait is “closed” and any vessel attempting passage would be set ablaze has created what Munro Anderson of Vessel Protect, a war insurance specialist within Pen Underwriting, described as a “de facto closure of the strait based primarily on perception of threat rather than tangible blockade.” Perception, in insurance markets, is reality.

Industry leaders at BIMCO, the global shipping association, have additionally warned that vessels with business connections to the United States or Israel may face difficulty obtaining coverage at any price, introducing a politically discriminatory dimension to coverage decisions that no previous Gulf crisis has featured.

Trump’s Guarantee — Bold But Operationally Thin

On Tuesday, March 3, President Trump responded with the blunt instrument of executive authority. In a post on Truth Social, he announced that he had ordered the U.S. Development Finance Corporation (DFC) to provide, “at a very reasonable price, political risk insurance and guarantees for the Financial Security of ALL Maritime Trade, especially Energy, traveling through the Gulf.” He added that the U.S. Navy would begin escorting tankers through the Strait of Hormuz “if necessary.”

The announcement produced an immediate, if partial, market response. Brent crude pulled back from its intraday high following Trump’s post, trading around $79 to $82 a barrel rather than testing the $90 threshold analysts had feared, though the price still represented a 13% surge from the pre-conflict level of approximately $68 in early February. U.S. stocks trimmed their steepest losses of the session. The Dow, which had been down more than 1,200 points at its low, recovered to a decline of around 300.

But the relief was fragile, because the details behind the headline are deeply problematic.

The DFC is a development finance agency — its mandate is to mobilize private capital in emerging markets, and it offers political risk insurance primarily to protect U.S. companies from losses due to expropriation or political violence in developing countries. Trump’s announcement would require the DFC to sell insurance to shipping companies of all nationalities — a scope of coverage far beyond what the agency has ever underwritten, for risks far beyond its existing actuarial expertise. No mechanism was announced. No pricing was offered. No implementation timeline was given. The White House press office did not respond to requests for further detail.

Bob McNally, president of consultant Rapidan Energy Group and a former senior energy official in the George W. Bush White House, was measured: “The announcement may help to reassure traders, but escorting and insuring will take some time to implement. The U.S. military will first want to suppress Iran’s ability to mine and attack ships with anti-ship cruise missiles and drones. Assuming Tehran decides to continue fighting, we are expecting that full resumption of Hormuz flows will require weeks instead of hours or days.”

The Navy escort dimension is, if anything, even more constrained. According to Lloyd’s List, U.S. Navy officials have already privately told tanker executives that the sea service does not currently have the operational availability to provide Hormuz escorts. An estimated one-third of the deployed U.S. fleet is already committed to Middle East operations, engaged in Tomahawk strike missions and air defense of Gulf states that have themselves been targeted by Iranian missiles. The word “if necessary” in Trump’s post is doing considerable heavy lifting.

Economic Fallout: From Gulf to Gasoline Pump

The damage to the broader global economy is unfolding along several distinct channels, and the speed of transmission is faster than in any previous oil shock.

Shipping rates have collapsed into records — in the wrong direction. The benchmark freight rate for VLCCs hauling crude from the Middle East to China climbed to $423,736 per day, more than double the level from the previous session — an all-time record — even as vessels decline to actually make the voyage. Hapag-Lloyd has imposed war risk surcharges of $1,500 per standard container for Arabian Gulf cargo; CMA CGM has introduced an Emergency Conflict Surcharge of $2,000 per container. These costs will be passed to cargo owners, then to manufacturers, then to consumers.

Oil prices are embedding a new floor. Brent crude has risen approximately 13% since February 28, touching $82 per barrel. With roughly 20 million barrels per day transiting the Strait in normal times — equivalent to 20% of global petroleum consumption — analysts at Goldman Sachs and Barclays have warned that a sustained closure could push Brent toward $100 and beyond. Gregory Daco, chief economist at EY-Parthenon, has placed his outer-range forecast at $110 per barrel if the disruption persists through year-end.

American consumers are already feeling the sting. The national average price for a gallon of regular gasoline rose 11 cents overnight to $3.11 — the largest single-day increase since Russia invaded Ukraine in March 2022 — reversing what the Trump administration had spent months celebrating as an energy-price success story heading into midterm election season. Mark Zandi, chief economist at Moody’s Analytics, offered the macro arithmetic: a $10 per barrel increase in oil prices translates into a 25-cent rise in the average gallon of gasoline, $50 billion in additional annual consumer spending, and a 15-basis-point drag on real GDP.

Asia faces an existential energy reckoning. In 2024, 84% of the crude oil and condensate flowing through the Strait of Hormuz was destined for Asian markets, with China, India, Japan, and South Korea accounting for roughly 69% of all Hormuz crude flows. Japan sources close to three-quarters of its crude oil via the Strait. South Korea sources roughly 60%. India sources approximately half its crude and a significant proportion of its LNG through the same waterway. Thailand, with net oil imports equivalent to 4.7% of GDP, faces perhaps the most acute near-term current account shock among major Asian economies, with every 10% rise in oil prices worsening its current account balance by around 0.5 percentage points of GDP.

Qatar, meanwhile, has halted LNG production at Ras Laffan, one of the world’s largest natural gas production and export terminals, cutting off 20% of global LNG supply and triggering emergency price spikes in European gas markets that had only recently stabilized from the post-Ukraine disruptions.

Hamad Hussain, climate and commodities economist at Capital Economics, has warned that oil prices sustained at $100 per barrel would add 0.6 to 0.7 percentage points to global inflation. Analysts at various institutions estimate a prolonged Hormuz closure could shave approximately 0.8% from global GDP through cascading energy, freight, and trade channel effects — a contraction equivalent to wiping out the annual economic output of a medium-sized European economy.

What Happens Next: Three Scenarios

Scenario One: Military Suppression Reopens the Strait Within Weeks. If U.S. and Israeli strikes succeed in degrading Iran’s anti-ship missile, drone, and mining capabilities, and if diplomatic back-channels produce an informal understanding within three to four weeks, war risk premiums could retreat to 0.3–0.4% — elevated but not prohibitive. The DFC insurance mechanism, however imperfect, may provide enough of a bridge to keep some tankers moving, supplemented by Saudi Arabia diverting crude through its East-West pipeline to Red Sea ports. The pipeline can handle approximately 2.6 million barrels per day — meaningful relief, but far short of the 20 million barrels per day that Hormuz normally carries.

Scenario Two: Protracted Conflict, Partial Rerouting. A war lasting two to three months would force a fundamental restructuring of Asian energy sourcing. China would aggressively compete for Atlantic and West African crude cargoes, tightening supply across the entire Pacific basin and pushing prices sharply higher. Cape of Good Hope rerouting adds roughly 12 to 14 days to a Middle East-to-China voyage, absorbing vessel capacity and compounding freight rates. Insurance markets would gradually reopen at a new, permanently higher risk premium — probably 0.4 to 0.6% — as the reinsurance market prices in a structurally more volatile Gulf environment.

Scenario Three: Full Strategic Closure. If Iran successfully deploys naval mines in the Strait’s shipping lanes — a tactic it rehearsed extensively in its 2026 military exercises — and if mining operations survive U.S. suppression efforts, the disruption could extend for months. In this scenario, oil prices reaching $110 to $130 per barrel becomes the base case, not the tail risk. Ali Vaez, director of the Iran project at the International Crisis Group, has described this as a scenario where prices would “gap violently upward on fear alone,” with financial conditions tightening globally, inflation surging by 2 to 4 percentage points, and fragile economies sliding toward recession “in a matter of weeks.”

Expert Voices: What the Market Is Actually Saying

“The underwriters are waiting to see what happens, and I think most sensible shipowners are waiting to see,” David Smith of McGill & Partners told S&P Global. “No shipowner wants to put either his asset, and more importantly his crew, in danger. They’ll look for every alternative.”

Peter Sand, chief analyst at freight pricing platform Xeneta, described the situation as “the further weaponisation of trade,” adding that the crisis had shattered any remaining hopes of a large-scale return of container shipping to the Red Sea in 2026 — plans that had been cautiously rebuilding after the Houthi ceasefire.

Dylan Mortimer, marine hull UK war leader at Marsh McLennan, wrote in a client advisory that the primary risks centre on vessel boarding and seizure by Iranian forces and the potential closure of the Strait — risks that standard commercial reinsurance models are simply not calibrated to price in a sustained, active-war scenario.

The Deeper Structural Question

The 2026 Hormuz crisis has exposed something more troubling than any single insurance rate: the fragility of a global energy system built on the assumption that the Strait would remain perpetually open. For 40 years, planners, economists, and geopoliticians treated Hormuz closure as a theoretical extreme scenario — a catastrophic tail risk too costly for any rational actor to actually pursue. That assumption has now been shattered.

Trump’s DFC guarantee, however symbolically powerful, cannot substitute for the decades of diplomatic architecture — the JCPOA framework, the UN nuclear monitoring regime, the back-channel communications between Washington and Tehran — that collapsed over the past several years. The hard truth is that political risk insurance from a development finance agency is not a substitute for geopolitical stability. It is, at best, a tourniquet.

What markets and policymakers are finally being forced to confront is a question that energy security analysts have raised for years: how long can the world’s most critical chokepoint be treated as a geopolitical externality, managed through deterrence alone, without investing in the diplomatic, infrastructure, and energy-transition alternatives that would genuinely reduce its leverage? The insurance market already has its answer. It is priced at 1% of hull value, per week, with cover increasingly hard to find.

The tankers remain at anchor. The gasoline pumps are turning.

Sources & Further Reading

• S&P Global Market Intelligence: “Marine War Insurance for Hormuz Dries Up” — Primary source for insurer pullback mechanics and premium rates
• CNBC: “US-Iran War Live Updates” — VLCC freight rate records, oil price data, market reaction to Trump’s announcement
• Al Jazeera: “Maritime Insurers Cancel War Risk Cover in Gulf” — Insurer names, 72-hour cancellation notices, premium data
• Maritime Executive: “Trump: U.S. Will Provide Risk Insurance for All Shipping in the Gulf” — DFC mandate scope, Navy escort limitations, Operation Earnest Will comparison
• USNI News: “Trump: U.S. Navy May Escort Tankers Through Strait of Hormuz” — Navy capacity constraints, fleet disposition
• Axios: “Trump Offers U.S. Insurance, Military Escorts to Energy Tankers” — Gasoline price data, political risk framing
• CNBC: “Strait of Hormuz Closure: Which Countries Will Be Hit the Most” — Country-by-country exposure analysis, Kpler data, Nomura framework
• Seatrade Maritime: “The Strait of Hormuz Crisis and Its Devastating Impact on Asia-Gulf Trade” — Asian import exposure data, LNG halt at Ras Laffan
• ABC News: “Why Unrest in the Strait of Hormuz Is Leading to Rising Oil Prices” — Zandi/Moody’s macro multipliers, GasBuddy gasoline data
• U.S. Energy Information Administration: “Amid Regional Conflict, the Strait of Hormuz Remains Critical Oil Chokepoint” — Authoritative baseline data on Hormuz flows and bypass infrastructure
• Windward Maritime AI: “Strait of Hormuz Shipping Falls After Insurance Pullback” — 80% traffic decline data, P&I club mechanics
• Wikipedia: “2026 Strait of Hormuz Crisis” — Consolidated event timeline and oil price data
• Claims Journal / Bloomberg: “Trump Says U.S. Will Escort, Insure Oil Tankers Amid the Iran War” — Bob McNally quote, DFC implementation uncertainty