War-risk premia, tanker freight and the Saudi state pool in the Gulf war, August–September 2026

ABSTRACT

Geopolitical risk in the 2026 Gulf war reached the oil price through a channel that futures-based “risk premium” estimates omit: marine war-risk insurance and the tanker freight that embeds it. This analysis argues that the channel prices threat rather than realised damage, differs by route and lags diplomatic news, using insurance-market premium data, Baltic Exchange and Argus freight figures and Saudi Arabia’s September 2026 national war-risk pool. Premia rose from 0.25% of hull value before the war to a peak of 10%; by late September they stood at 6–9% for Hormuz voyages and about 3% for Yanbu. Lloyd’s List estimates that war-risk cover adds roughly $7–8 to a barrel. The Saudi pool moves part of that privately priced risk onto the state balance sheet.

1. The premium shock in numbers

The war that began on 28 February 2026 did not formally close the Strait of Hormuz; it restricted transit. In the first week of September, Kpler data showed 5 to 11 ships a day passing the strait, and in the same week the United States struck two Iranian tankers off Kharg Island and near Jask (Al Jazeera, 2026b). This piece measures the insurance-and-freight channel in August–September 2026 for Hormuz, the Red Sea and Saudi export ports. Its claim is that the channel prices the threat independently of physical supply loss, is route-specific, and responds to diplomatic news more slowly than futures prices do.

War-risk premia stood at 0.25% of hull value before the conflict, peaked at 10%, and were in a 3–8% range as of 26 August. On a $150 million tanker a 10% premium means $15 million per voyage, against $375,000 at the pre-war rate (Rosanes, 2026; pre-war figure is the author’s calculation). The same source records a pre-crisis median of about 73 daily commercial transits through Hormuz and a single commercial transit on 16 August. That count uses a different vessel definition from Kpler’s daily ship counts, so the two series cannot be compared directly.

By 25 September premia had separated by route. The Yanbu premium, below 1% in early July, had reached about 3%; southern Saudi ports including Jizan were at up to 7%; Hormuz voyages were at 6–9% (Ship Universe Editorial Team, 2026). On the same $150 million hull, 3% at Yanbu equals $4.5 million per voyage and 9% for Hormuz equals $13.5 million (author’s calculation). The gap is the insurance advantage of exporting via the East–West pipeline and Yanbu; the at-least-threefold rise in the Yanbu premium since early July shows Red Sea attacks eroding it.

2. How a threat becomes a cost

Caldara and Iacoviello (2022) measure geopolitical risk from newspaper text and treat threats as a component separate from acts. The insurance market reproduces that separation in prices. A war-risk premium is the price of the probability that a hull is damaged on a given voyage; it rises when that probability rises and does not wait for an attack to occur. The premium can therefore be read as a market valuation of the threat component of geopolitical risk.

Yanbu illustrates the mechanism. On 24 September Saudi forces intercepted six ballistic missiles that the Houthis fired at Taif and Yanbu (The Nation Editorial Team, 2026). Houthi claims to have hit Aramco facilities at Yanbu are unverified one-sided statements (Al Jazeera, 2026a). The rise of the Yanbu premium from below 1% to about 3% thus prices a higher probability of being targeted, without verified damage at the terminal.

The mechanism also explains why Hormuz is “restricted” rather than “closed”. Talmadge (2008) assessed Iran’s ability to close the strait in terms of mines, anti-ship missiles and the military operations needed to counter them. The 2026 record shows that commercial traffic can be suppressed through cost without a formal closure: passage remains legally and physically possible, while insurance and freight make a large share of voyages uneconomic.

3. Where the cost sits: delivered barrels, not the futures screen

Freight data show the same route split. On 9 September the Baltic Exchange’s Middle East Gulf–China VLCC route (TD3C) rose from WS631.67 to WS677.22, a time-charter equivalent of about $704,000 a day; the West Africa–China route (TD15) stood at WS236.88, about $210,600 a day (Baltic Exchange, 2026). A Gulf-loading VLCC therefore earned about 3.3 times as much per day as a West African one (author’s calculation). Argus put VLCC freight at $19.39 a barrel as of 2 September, of which $11.69 a barrel was a premium over the route that bypasses the strait (Argus Media, 2026).

For insurance alone, an industry estimate exists. David Osler of Lloyd’s List puts the war-risk insurance share of a barrel of crude at roughly $7–8, and reports more than 70 cases with total claims of $2 billion since the conflict began (AGBI, 2026). The Argus freight premium and the Osler insurance figure must not be added together: the sources do not state how much war-risk cost the freight rate already contains, and the two numbers refer to different dates. Read jointly, they establish only an order of magnitude: war conditions add a burden on the order of ten dollars per barrel to the delivered cost of Gulf-loaded crude.

This cost does not enter Brent futures directly. Insurance and freight raise the delivered cost of Gulf barrels to the buyer and widen the price difference between Gulf and Atlantic-basin barrels. How the cost is split between buyer and seller depends on contract terms and market tightness; the sources used here do not allow that split to be measured.

In the Red Sea the mechanism appears in traffic volume. Ship traffic through Bab el-Mandeb fell from about 80 to about 30 a day as of 24 September, a 62% decline (Industrial Info Resources, 2026). The Red Sea route that bypasses Hormuz has itself become a risk zone at its southern exit.

4. The Saudi war-risk pool: risk moved to the state

In September 2026 Saudi Arabia set up a national marine war-risk insurance pool managed by Saudi Re (Ship Universe Editorial Team, 2026). The pool’s function is to have the state carry part of the risk that private reinsurers price. For Saudi-linked cargoes it lowers insurance cost and protects the competitiveness of Yanbu exports. In exchange, potential claims become a contingent liability of the Saudi state. The sources do not report the pool’s capital or cover terms, so that liability cannot be sized. The sector-wide $2 billion in claims (AGBI, 2026) indicates why private markets price this risk high.

Physical protection serves the same end. On 25 September France sent troops, radar and defence systems to the Yanbu terminal, which President Macron said were to protect the facility (Al Jazeera, 2026a). Better air defence lowers the attack-success probability that insurers price; October premia will show whether this registers.

5. Alternative explanations considered

The first alternative holds that futures prices already capture the geopolitical component, so insurance adds nothing separate. The 26 August episode contradicts this. ICE Brent futures fell 2.6% to $86.28 on reports of Iran–Oman talks on a joint temporary navigation corridor and mine clearance in Hormuz, while only five commodity vessels had transited on 25 August against a ten-day average of 15 (Charles, 2026). Insurance data of the same day showed premia at 3–8% (Rosanes, 2026). Futures priced the probability of reopening; insurers continued to price high per-voyage risk.

A second alternative attributes the premium rise to accumulated losses, with insurers recovering the $2 billion in claims rather than pricing forward threat. Loss experience plausibly raises the general level, but it does not explain the route pattern: the Yanbu premium rose at least threefold without verified terminal damage. The evidence favours forward threat pricing at the route level, while the sources cannot exclude a loss-recovery component in the overall level.

A third alternative reads the freight premium as a pure tonnage effect of longer voyages and displaced ships. Argus defines its $11.69 premium against the Hormuz-bypassing route, which isolates the strait-specific element, but the share of war-risk cost inside that freight rate is not reported. The tonnage and insurance components therefore remain inseparable in these data.

6. Outlook: Türkiye, Saudi Arabia and the World

Globally, the US–Iran talks decide the channel’s direction. As of 25 September the parties were discussing a phased path in which Tehran reopens Hormuz and Washington lifts its economic blockade (The Nation Editorial Team, 2026). On the mechanism set out here, an agreement could move Brent futures quickly but would lower premia only as incident-free voyages accumulate. While mine clearance and selective-attack risk persist, a return of Hormuz premia to the pre-war 0.25% within October is not a reasonable expectation. The IEA’s October Oil Market Report on 14 October (International Energy Agency, 2026) will be the first institutional data on actual September flows through Hormuz and the Red Sea.

For Saudi Arabia the 2027 question is whether the national pool remains a crisis instrument or becomes a standing part of export infrastructure. As long as Houthi attacks continue in the Red Sea, the Yanbu premium is likely to stay below Hormuz but above its pre-war level, and the pool’s contingent liability persists.

For Türkiye the channel cuts two ways. Seaborne Gulf barrels carry the insurance and freight premium into the import bill. Crude arriving by pipeline at Ceyhan loads outside the Hormuz and Bab el-Mandeb risk zones. The Kirkuk–Ceyhan agreement signed on 1 August provides a 750 kb/d allocation, while actual flow in early August was about 170 kb/d (Arab News Pakistan, 2026). High seaborne premia raise Ceyhan’s cost advantage; turning that advantage into volume depends on narrowing the gap between allocation and flow in 2027.

7. Conclusion

August–September 2026 data show that war-risk insurance and freight form a distinct, measurable channel through which geopolitical risk reaches the oil price. Premia rose from 0.25% of hull value to a 10% peak and by late September ranged from about 3% at Yanbu to 6–9% for Hormuz; Lloyd’s List puts the insurance cost at $7–8 a barrel. The channel prices threat without verified damage, splits by route, and declines only as incident-free voyages accumulate, which is why it lags diplomatic news that moves futures within a day. The Saudi pool has converted part of this cost into a contingent state liability of unknown size. Even under a phased Hormuz reopening, the war component of delivered-barrel cost should be expected to fall later than futures prices.

SOURCES

AGBI. (2026). War risk cover adding $8 to crude oil price due to Iran conflict. Arab Gulf Business Insight. https://www.agbi.com/shipping/2026/09/war-insurance-adds-8-to-a-barrel-of-oil/

Al Jazeera. (2026a, 25 September). Saudi Arabia allies line up support as Houthi attacks mount. https://www.aljazeera.com/news/2026/9/25/saudi-arabia-allies-line-up-support-as-houthi-attacks-mount

Al Jazeera. (2026b, 6 September). US, Iran engaged in tanker war: Where is the months-long conflict headed? https://www.aljazeera.com/news/2026/9/6/us-iran-engaged-in-tanker-war-where-is-the-months-long-conflict-headed

Arab News Pakistan. (2026, 1 August). Turkiye, Iraq sign one-year oil pipeline deal. https://www.arabnews.pk/node/2653014/middle-east

Argus Media. (2026, 3 September). Hormuz traffic at 9 vessels: Update. https://www.argusmedia.com/en/news-and-insights/latest-market-news/2873472-hormuz-traffic-at-9-vessels-update

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Caldara, D., & Iacoviello, M. (2022). Measuring geopolitical risk. American Economic Review, 112(4), 1194–1225. https://doi.org/10.1257/aer.20191823

Charles, R. (2026, 26 August). Brent drops 2.6% as Hormuz reopening hopes outrun oil flows. Crux Investor. https://www.cruxinvestor.com/posts/brent-drops-2-6-as-hormuz-reopening-hopes-outrun-oil-flows

Industrial Info Resources. (2026, 24 September). Saudi oil loaded from port at Yanbu after pipeline attack. Industrial Info. https://www.industrialinfo.com/iirenergy/industry-news/article/saudi-oil-loaded-from-port-at-yanbu-after-pipeline-attack–362883

International Energy Agency. (2026). Oil market report – October 2026. https://www.iea.org/events/oil-market-report-october-2026

Rosanes, M. (2026, 26 August). Trump says Hormuz is clear. The insurance market disagrees. Insurance Business. https://www.insurancebusinessmag.com/us/news/marine/trump-says-hormuz-is-clear–the-insurance-market-disagrees-587552.aspx

Ship Universe Editorial Team. (2026, 25 September). Saudi Red Sea tanker insurance costs surge as Yanbu war-risk premium hits 3%. Ship Universe. https://www.shipuniverse.com/?p=20543

Talmadge, C. (2008). Closing time: Assessing the Iranian threat to the Strait of Hormuz. International Security, 33(1), 82–117. https://doi.org/10.1162/isec.2008.33.1.82

The Nation Editorial Team. (2026, 25 September). Oil gains about 3% on Sept 24 as Houthis target Saudi Arabia. The Nation. https://www.nationthailand.com/news/world/40071450

Furkan Mahmut Tameroglu