Subject line: A signed deal reopened Hormuz to 27 ships a day
The Islamabad Memorandum expired on Monday without a successor. It is worth being precise about what it achieved while it ran: between 17 June and 14 July, with a signed US–Iran agreement in force and toll-free passage on offer, the seven-day moving average of daily transit calls through the Strait of Hormuz peaked at 26.71. The 2025 average was 75.16. The threshold prediction markets use to define "normal traffic" is 60. The best case already ran this year, under the most favourable political conditions anyone has managed to construct, and it cleared 44% of the bar. The last dated read on the traded contract, on 6 August, was 45%; the same contract was 52% on 8 July. The Desk probability-weights it at 5%. (Dated reads — the Desk could not obtain a live quote on 20 August.)
The Trigger
Three things happened in the last seventy-two hours, and they point the same way.
On Monday 17 August the memorandum of understanding between the United States and Iran — signed 17 June 2026 and published in full by NPR the following day — reached the end of its sixty-day term and expired without a successor agreement. It had already broken down in practice in early July, when the US Treasury withdrew the sanctions waivers that made it work and US Central Command resumed its naval blockade of Iranian ports on 14 July. Monday removed the last legal scaffolding. Vessel-tracking data compiled by Kpler and reported on 20 August put total crude exiting the Gulf during the sixty-day window at 374 million barrels — about 6.1 mb/d, against 2.3 mb/d in the ten weeks before it and roughly 15 mb/d in 2025. More than half of that moved in the first three weeks.
On Tuesday 18 August a cargo ship was struck by a projectile off Oman, killing one seafarer — identified by INTERCARGO as a crew member of the Liberia-flagged bulk carrier Minoan Dignity. No group has claimed responsibility. It was the fifth commercial vessel attacked in the region in the week to 19 August and, per the International Maritime Organization's count, brings seafarer deaths since late February to at least eighteen.
On Wednesday 19 August Lloyd's List Intelligence published its weekly Strait of Hormuz Brief. Preliminary data show 73 transits between 10 and 16 August, down from 91 the week before. Non-Iranian-linked transits — the ones that represent genuine commercial traffic rather than sanctioned trade — fell to 43 from 60. The brief's own conclusion: "US–Iran diplomacy has effectively collapsed, removing any credible near-term pathway to de-escalation."
Underneath all three sits a market that has stopped waiting. VLCC earnings on the Middle East Gulf–China route reached roughly $510,000 a day on Monday 17 August, the highest since late June, per Baltic Exchange assessments reported by gCaptain; a fixture out of the Gulf that week went at $31m lump sum, with the charterer carrying a war-risk premium in "high single-digit percentages of the vessel's hull value." Brent closed at $95.29 on 18 August (FRED DCOILBRENTEU). Abu Dhabi National Oil Company's logistics arm has disclosed acquisitions of six VLCCs and five VLGCs for a combined $1.3bn. DP World is running Jebel Ali at roughly a tenth of normal container throughput and spending about $100m a month to keep it ready to reopen — and in the same quarter signed a fifty-year concession to build two new terminals at Fujairah, outside the strait.
That is the tell. Paper is priced for a reopening. Steel is being bought for a siege.
The Forecast Question
On what date does the seven-day moving average of daily transit calls through the Strait of Hormuz first print at or above 60 — and does it happen at all before 31 December 2027?
Grading series. The IMF's PortWatch Daily Chokepoints dataset, portid = chokepoint6 ("Strait of Hormuz"), field n_total — the daily count of transit calls, updated weekly on Tuesdays. The seven-day trailing mean of that field is the sole arbiter. This is deliberately the same construction the traded contracts name as their resolution source. One caution, stated before anything is built on it: market commentary through July and August has described a current level of 10–12 transits a day where this series reads 3–4, and a pre-crisis baseline of 88–130 where this series averaged 75.16 in 2025. The Desk grades on the PortWatch n_total seven-day mean as published. If the contract in fact resolves on a fuller count, the threshold sits in a different place on that series than on this one, and the comparison later in this report is indicative rather than exact.
Window. 20 August 2026 through 31 December 2027 inclusive — 498 days, modelled as 71 weekly steps.
Starting level. The 7-day moving average on 16 August 2026, the latest observation, is 3.57. The last day this series printed at or above 60 was 1 March 2026, and that reading (64.29) was itself contaminated by pre-closure days still inside the window. On any clean reading the strait has been below the threshold for 172 days.
These two counts are not in conflict. Lloyd's List counted 73 transits between 10 and 16 August; PortWatch's n_total records 25 over the same seven days, which is what produces a seven-day average of 3.57. The gap is the AIS undercount described below: PortWatch sees only vessels broadcasting, and since late February many are not. The Desk grades on PortWatch because that is what the contract resolves on, and treats every PortWatch reading as a lower bound.
Scenario partition — mutually exclusive, jointly exhaustive, graded on the same series:
| Scenario | Definition | |
|---|---|---|
| UPSIDE | Negotiated Reopening | first 7dMA print ≥ 60 on or before 31 Dec 2026 |
| BASE | The Long Siege | first 7dMA print ≥ 60 between 1 Jan and 31 Dec 2027 |
| TAIL A | The Red Sea Outcome | no print ≥ 60 by 31 Dec 2027, but the 7dMA holds at or above 30 for eight consecutive weeks — a durable plateau at partial flow |
| TAIL B | Frozen Shut | no print ≥ 60 by 31 Dec 2027 and no eight-week stretch at or above 30 |
The 30 threshold in the tail split is not arbitrary. It sits above the Islamabad Memorandum's own peak of 26.71, so Tail A requires the strait to do something it has not managed all year; and it sits at 40% of the 2025 average, roughly where the Red Sea settled after Bab el-Mandeb closed. The eight-week condition is what makes Tail A a plateau rather than a spike — the memorandum window itself lasted four weeks and would not have qualified.
One caveat on the metric, stated up front. PortWatch carries its own warning that GPS jamming, AIS spoofing and vessels going dark have made the regional data unreliable since late February, and the EIA repeated it on 12 August. A near-zero transit count is a lower bound. If reporting normalises faster than shipping does, this series could clear 60 partly on measurement. That is a real falsifier of the Desk's call and it appears again in the red team.
Prior / Base Rate
Strip the narrative out and ask the outside-view question: when a maritime chokepoint or a major export route is closed by a state actor with continuing capability and continuing intent, how often does it reopen inside sixteen months?
Five cases sit in the class. None of them is encouraging.
The Red Sea, December 2023 to today. This is the binding analogue and the only live one. The IMF logs the disruption as still open — todate is null, 978 days and counting. The Desk pulled the full PortWatch daily series for the Suez Canal and Bab el-Mandeb and computed the arithmetic directly. Suez transit calls averaged 73.61/day across 2023, fell to 39.54 in 2024 (−46.3%), 38.45 in 2025 (−47.8%), and are running at 40.58 year-to-date in 2026 (−44.9%). Bab el-Mandeb is worse: 73.73 in 2023 against 34.62 in 2026, −53.0%. The monthly Suez readings for every month of 2026 sit in a band between 38.97 and 42.03. That is not a recovery in progress. It is a plateau at roughly 55% of baseline, thirty-two months in, with no trend.
Iran, 1979. The initial supply loss reached nearly 90% of Iranian production in January 1979; the EIA's own retrospective records an average drop of 3.9 mb/d sustained across 1978–81, and Iranian output in 2010 was still more than 1.5 mb/d below its 1977 average. Thirty years, no normalisation.
Iraq and Kuwait, 1990. Roughly 4.3 mb/d removed at once. Kuwait, despite the well fires, exceeded pre-disruption output "in less than four years." Iraq never did — 2.4 mb/d in 2010 against a 1990 peak of 3.5 mb/d.
Russia to Europe, 2022. Not a closure but the same mechanism: a politically enforced re-plumbing of a trade route. Russian crude fell from 20% of EU crude imports in 2022 to 2% in 2025, and 0.8% of EU petroleum-oil imports in Q1 2026. The barrels did not disappear; they went to China and India. The route never came back, and EU law is now closing it permanently.
The Iran–Iraq Tanker War, 1984–88. The important fact here cuts the other way. Despite years of attacks on shipping and repeated Iranian threats, the Strait of Hormuz was never actually closed — Iran depended on the sea lanes for its own exports. Gulf commercial shipping fell about 25% at its worst. Real oil prices declined through the 1980s. 2026 is therefore the first genuine closure of this strait in the modern era, which means the reference class is thin and partly inapplicable, and the Desk down-weights it accordingly.
Against those, the fast-recovery counterexample: Abqaiq, 14 September 2019. 5.7 mb/d removed; Khurais resumed within twenty-four hours; Aramco stated full capacity restored by end-September — sixteen days. But Abqaiq was physical damage with nobody contesting the sea lane afterwards. It is the wrong class, and the EIA says so in general terms: outages tied to weather, accident or technical failure "generally end within weeks," while "disruptions tied to political disputes or conflicts… often last for years."
What the literature offers, and what it does not. There is no published empirical distribution of politically-driven chokepoint-disruption durations. The closest thing is a structured expert elicitation for the US Department of Energy (Beccue, Huntington, Leiby & Vincent, Energy Policy 115, 2018), which asked specialists to band a large chokepoint disruption and concluded that an 8 mb/d event would be "either short or long at 50% probabilities, but never very long." The Red Sea has already falsified that elicitation, and Hormuz is testing it again. Treat it as a prior held by serious people, not as a frequency.
The base rate the Desk carries into the model: in the closest reference class, normalisation inside sixteen months is rare — but a partial equilibrium is the modal outcome. Every case in the class found a level and sat at it.
The Evidence-Update Table
No probability below appears without the evidence that moved it.
| # | Evidence | Date | Direction | Strength | Effect on P(reopen by end-2027) |
|---|---|---|---|---|---|
| 1 | Islamabad Memorandum expires with no successor | 17 Aug 2026 | Against | High | −6pp |
| 2 | Under that memorandum the 7dMA peaked at 26.71 — 44% of the threshold | 17 Jun–14 Jul 2026 | Against | Decisive | −12pp |
| 3 | LLI: transits 73 (10–16 Aug) vs 91 prior week; non-Iranian-linked 43 vs 60 | 19 Aug 2026 | Against | Medium | −3pp |
| 4 | LLI: "US–Iran diplomacy has effectively collapsed" | 19 Aug 2026 | Against | Medium | −3pp |
| 5 | Iran's stated terms — release of frozen assets, end of regional conflicts | 12 Aug 2026 | Against | Medium | −2pp |
| 6 | Fifth vessel attacked in a week; one seafarer killed off Oman | 18 Aug 2026 | Against | Medium | −2pp |
| 7 | Red Sea base rate: 978 days, Suez plateaued at ~55% of baseline, no trend | to 20 Aug 2026 | Against | High | −8pp |
| 8 | EIA STEO assumes Gulf output "near pre-conflict averages in early 2027" | 11 Aug 2026 | For | High | +9pp |
| 9 | Goldman's 2027 base case ($75 Brent) assumes Hormuz open | 23 Jul 2026 | For | Medium | +4pp |
| 10 | Wood Mackenzie: 70% of shut-in volume returns within 3 months of reopening | Jun 2026 | For | Medium | +3pp |
| 11 | Iran's own exports collapsed to 294 kb/d from 1.7 mb/d in 2025 — it has an interest in reopening | Aug 2026 | For | Medium | +4pp |
| 12 | Oman mediation continuing; Iran called the talks "complex but continuing" | 17 Aug 2026 | For | Low | +2pp |
| 13 | Physical capital pricing years: 5-year-old VLCC above newbuild price; resales 21–35% over | 7 May 2026 | Against | Medium | −3pp |
| 14 | ADNOC L&S buys 6 VLCCs + 5 VLGCs for $1.3bn rather than charter third-party tonnage | 19 Aug 2026 | Against | Medium | −2pp |
| 15 | DP World signs a 50-year Fujairah concession — bypass infrastructure, not a bridge | 22 Jul 2026 | Against | Medium | −2pp |
| 16 | QatarEnergy force majeure; Ras Laffan trains 4 and 6 said to need 3–5 years to repair | Mar–Jul 2026 | Against | Low* | −2pp |
| 17 | LNG through Hormuz collapsed 10.5 → 0.8 bcf/d (4Q25 → 2Q26); Cape route up 6.0 → 9.7 | 12 Aug 2026 | Against | High | −4pp |
| 18 | PortWatch AIS reliability warning — counts are a lower bound | 12 Aug 2026 | For | Medium | +5pp |
* Item 16 rests on secondary reporting; no QatarEnergy-hosted statement was located. Carried at low confidence and weighted accordingly.
The table records the direction and rough weight of each piece of evidence; it is not the arithmetic that sets the number. The number is set by the aggregation rule below — base rate 0.35, expert priors 0.30, simulation 0.35 — which produces 5.8 + 30.4 = 36.2, published as P(reopen by 31 December 2027) = 35%, of which only 5 points fall in 2026.
The Scenarios
| Scenario | Weight | Trigger that puts it in play | Tripwire to watch | |
|---|---|---|---|---|
| UPSIDE | Negotiated Reopening | 5% | A successor agreement to the Islamabad Memorandum with sanctions relief attached — the thing Tehran has actually asked for | War-risk premium falls below 3% of hull value; non-Iranian-linked weekly transits above 150 |
| BASE | The Long Siege | 30% | Attrition: Iranian export economics, Gulf fiscal strain and Asian buyer pressure force a deal during 2027 | Oman channel producing a dated framework; CENTCOM blockade suspended; 7dMA sustained above 30 |
| TAIL A | The Red Sea Outcome | 30% | No settlement, but shipowners adapt: a core group prices the risk, insurers keep writing, traffic finds a level | 7dMA stabilises in the 30–50 band for eight consecutive weeks with no political change |
| TAIL B | Frozen Shut | 35% | Escalation or entrenchment: hull war capacity withdraws, mining resumes, the Gulf's export architecture permanently relocates outside the strait | Hull war capacity contracts; second ADCOP line sanctioned; Jebel Ali throughput fails to recover through 2027 |
Weights sum to 100%. They are rounded to the nearest 5%, per the Desk's standing rule against false precision.
Negotiated Reopening (5%). For this to happen the parties must not merely sign something — they signed something in June — but sign something that survives, and then the market must rebuild confidence fast enough for the seven-day average to more than double the memorandum's best week, inside nineteen weeks. The June experiment is the whole argument against it. Everything that could go right politically did go right, and the series peaked at 26.71.
The Long Siege (30%). The modal path to a genuine reopening runs through 2027, not 2026, and it runs through economics rather than diplomacy. Iran is exporting 294 kb/d against 1.7 mb/d in 2025. Saudi Arabia ran an SR160bn first-half deficit and financed all of it with debt. Global observed oil inventories have fallen 410 million barrels since the war began and are below 7.9 billion barrels for the first time since April 2025 — the buffer that has absorbed this shock is running out, and that is a clock on every party.
The Red Sea Outcome (30%). The most under-discussed branch. It requires no settlement at all: it requires only that a core group of owners keeps transiting, that insurers keep writing at 7.5–10% of hull value, and that the trade finds an equilibrium. Lloyd's List already describes exactly this — "a small core group of operators remains active," and "a bifurcated tanker market is emerging west of Hormuz," with national oil companies buying their own tonnage. This is what the Red Sea did. It is what Russia's barrels did. Markets adapt around interdiction more reliably than they resolve it.
Frozen Shut (35%). The strait stays effectively closed through 2027 and the Gulf's export architecture relocates outside it. This is not a doom scenario; it is a capex scenario. The infrastructure to make it real is already being built and disclosed: Fujairah terminals on a fifty-year concession, ship-to-ship transfer hubs off Oman, Petroline running crude to Yanbu — Bab el-Mandeb liquids flows rose to 8.1 mb/d in 2Q26 from 5.4 mb/d in 4Q25 as Saudi Arabia re-routed west, per the EIA. The IEA's own factsheet puts total alternative-route spare capacity at 3.5–5.5 mb/d against roughly 20 mb/d that used to transit. The bypass cannot replace the strait. It can make the strait less necessary at the margin, and that is precisely what makes a reopening less urgent for everyone except the party that closed it.
The Monte Carlo
A real simulation, 50,000 paths, seed 20260820, numpy 2.2.6. The code ships with this edition as mc.py and the output as mc_out.json; the run is bit-reproducible. The twenty-two envelope legs run with the Brent block disabled — it enters no scenario definition, and in the full-Brent run both Brent-volatility legs returned an identical P(reopen) to central. Disabling it shifts the random-number stream, so the envelope legs are statistically but not bit-identically comparable to the headline run (central 28.5% against the headline 28.3%).
Structure. A three-state weekly Markov chain over the political regime — Contested, Truce, Settlement — driving a log-space mean-reverting observable (the 7-day moving average of transit calls), with a per-path confidence-rebuild speed. Brent runs alongside on Student-t(5) daily shocks with regime-dependent volatility and attractors; it is reported as an output only and does not enter any scenario definition.
Calibration — what is measured and what is not.
| Parameter | Value | Source |
|---|---|---|
| Contested 7dMA distribution | log-mean 1.176, log-sd 0.449 (mean 3.55, n=134 days) | PortWatch, 8 Mar–16 Jun and 15 Jul–16 Aug 2026 |
| Truce 7dMA distribution | log-mean 2.695, log-sd 0.538 (mean 16.66, peak 26.71, n=28) | PortWatch, 17 Jun–14 Jul 2026 |
| Settlement target | 75.16 | PortWatch, 2025 full-year mean |
| P(Contested→Truce) | 0.040/week | Measured: one event in 25 weeks |
| P(Truce→Contested) | 0.333/week | Measured: the truce window was 28 days (4 weeks); the hazard is set to 0.333/wk rather than 0.25/wk as a deliberately conservative round-up — logged, and worth +3.2pp on P(reopen by end-2027) if reversed, changing no published weight |
| P(Truce→Settlement) | 0.050/week | Judgmental — never observed |
| P(Contested→Settlement) | 0.004/week | Judgmental — never observed |
| P(Settlement→Contested) | 0.010/week | Judgmental — never observed |
| Confidence-rebuild half-life | U(2, 10) weeks | Bracketed by the June response (fast) and Marsh's warning on hull war capacity (slow) |
| Brent daily σ, contested | 0.0414 (65.6% annualised) | Measured: trailing 60 sessions, FRED |
Three of the five transition hazards have never been observed, and two of the five rest on a single event each. That is the model's weakest point and no amount of path count fixes it.
Results.
| Outcome | Probability |
|---|---|
| 7dMA ≥ 60 on or before 31 Dec 2026 | 1.7% |
| 7dMA ≥ 60 during 2027 | 26.7% |
| No ≥60, but the 7dMA holds ≥30 for eight consecutive weeks | 4.1% |
| No ≥60 and no eight-week stretch at ≥30 | 67.6% |
| Any reopening by 31 Dec 2027 | 28.3% |
| Reopening by 30 June 2027 | 14.7% |
| 7dMA ever holds ≥30 for eight consecutive weeks | 32.1% |
First-crossing week, conditional on crossing: P10 week 22, P50 week 44 (roughly late June 2027), P90 week 65.
Brent, as an output: terminal P5 $54.71 / P50 $79.15 / P95 $132.44; running maximum P50 $138.06, P95 $200.83; P(max > $130) 61.5%, P(max > $150) 35.5%. Those maximum figures are a running maximum over 498 sessions at measured 66% annualised volatility and should be read as what that volatility mechanically implies, not as a price call.
The uncertainty band that matters. The sampling standard error on the headline leg is ±0.06pp. Ignore it. The honest band is the twenty-two-specification envelope, which puts P(reopen by 31 Dec 2027) between 13.3% and 50.0% — a spread more than six hundred times the sampling error. The single most powerful lever is the confidence-rebuild speed: a 1–4 week half-life gives 38.0% and a 6–20 week half-life gives 13.3%. The second is the never-observed truce-hardening hazard, worth 21.6% to 50.0% across a factor of eight.
Named limitations. (1) The model has no adaptation channel — no mechanism by which shipowners gradually return without any political change. That is exactly what the Red Sea did, and its absence is why the raw simulation puts Tail A at only 4.1% while the Desk publishes 30%. (2) Three hazards are judgmental. (3) The observable is a vessel count, not tonnage; PortWatch's own capacity field shows Hormuz throughput at 0.088 Mt/day in August against a 2025 mean of 2.877 Mt/day, and a reopening measured in ships need not be a reopening measured in barrels. (4) AIS unreliability makes the input a lower bound.
The aggregation rule, applied. Per the Desk's methodology, three inputs, weighted: base rate 0.35 (down-weighted from the standard 0.40 — the reference class has five members and none involved a chokepoint fully closed; reason logged), expert priors 0.30, simulation 0.35 (up-weighted from 0.30 — it is the only leg fitted to the 2026 observable). That produces 5.8 / 30.4 / 27.3 / 36.6, which rounds to the published 5 / 30 / 30 / 35 (nearest-5 rounding puts Tail A at 25 and Tail B at 35, summing to 95; Tail A is lifted to 30 as the minimum-error adjustment that makes the four weights sum to exactly 100).
Market vs Desk View
Prediction markets are the only place a genuine probability on this question trades, and they name the same PortWatch series as their resolution source.
| Market (dated reads) | Desk | |
|---|---|---|
| Normal traffic by ~1 Jan 2027 | 45% (Kalshi, 6 Aug 2026); 52% on 8 Jul; 38% for end-2026 on 24 Jul | 5% |
| Normal traffic by ~1 Jul 2027 | 47% (Kalshi, 24 Jul 2026) | ~15% |
The market figures come from several dated reads and they are not perfectly consistent with one another: CNBC reported on 8 July that Kalshi traders had pushed normalisation into 2027, again on 24 July that the odds had fallen further, and an aggregator reading dated 6 August put the January-2027 contract at 45¢. The July-2027 contract last printed publicly at 47% on 24 July, having fallen from close to 70% two days earlier. The Desk could not obtain a live quote on 20 August and says so. Every market figure above is a dated read, not a current one, and the comparison is approximate for the reason given in the Forecast Question: the contract's exact resolution source and the Desk's series may not be identical in every particular.
The Desk's ~15% on the July-2027 row is derived, not asserted: the 5% Upside leg plus the portion of the 30% Base case falling in the first half of 2027. On the simulation's own first-crossing distribution — P50 at week 44, late June 2027 — that is roughly a third of the Base leg.
Institutional forecasters sit closer to the market than to the Desk. The EIA's Short-Term Energy Outlook of 11 August states plainly that it expects "most crude oil production in the region to return to near pre-conflict averages in early 2027," with about 0.6 mb/d of residual disruption through end-2027, and forecasts Brent averaging $69/bbl in 2027 on that basis. Goldman Sachs' 2027 base case of $75 Brent assumes Hormuz remains open, with a stated alternative of "Brent exceeding $120 by the fourth quarter of 2026 and averaging $100 in 2027, if Hormuz remains disrupted." Wood Mackenzie's June base case assumed normalisation in August — that premise has now failed, and the forecast should be read as superseded rather than live.
The Brent forward curve says the same thing in price. The complex returned to clear backwardation through July and August, with the front above the deferred and the curve flattening toward the high-$50s to mid-$60s by the early 2030s. A backwardated curve is a market saying: tight now, normal later.
Where the Desk disagrees, and why. Three reasons, in order of weight.
First, and decisively: the reopening scenario has already been run as a live experiment and it failed. For four weeks in June and July there was a signed agreement, sanctions waivers, toll-free passage and political will on both sides. The seven-day moving average peaked at 26.71 against a threshold of 60. Whatever probability one assigns to a durable deal, it must then be multiplied by the probability that a deal produces more than twice what the last deal produced.
Second, the base rate is brutal and the market appears not to be using it. The nearest live analogue is 978 days old and has settled at 55% of baseline with no recovery trend across three full calendar years.
Third, the capital that has to physically show up is not priced for a reopening. A five-year-old VLCC trades $9m above a newbuild contract; resales are 21–35% over newbuild; ADNOC bought its own tonnage rather than charter; DP World took a fifty-year concession outside the strait. Owners who are wrong about duration lose money. When paper and steel disagree about how long something lasts, the Desk sides with steel.
What is genuinely underpriced, in the Desk's reading: the Red Sea Outcome. Both the market's framing and the official forecasts are binary — closed now, normal later. The historical record says the modal outcome of a contested route is neither: it is a durable partial equilibrium that nobody ever declares. Almost nothing in the current pricing is set up for a world in which Hormuz runs at 40% of baseline indefinitely and nobody signs anything.
Universal-Owner Portfolio Heatmap
Direction of the reprice, by asset class, under each branch. Magnitude bands are the Desk's, directional only, and are not advice.
| Asset class | Negotiated Reopening (5%) | The Long Siege (30%) | Red Sea Outcome (30%) | Frozen Shut (35%) |
|---|---|---|---|---|
| Global equities | ↑ 3–6% | ↔ | ↔ / ↓ 2–4% | ↓ 5–10% |
| Energy equities | ↓ 10–15% | ↔ / ↑ | ↑ 5–10% | ↑ 15–25% |
| Tanker & shipping equities | ↓ 30–50% | ↓ 15–25% | ↑ 10–20% | ↑ 25–40% |
| Airlines, chemicals, fertiliser | ↑ 10–20% | ↔ / ↓ | ↓ 5–15% | ↓ 20–35% |
| Government bonds (DM long end) | ↑ (yields ↓ 20–40bp) | ↔ | ↓ (yields ↑ 15–30bp) | ↓ (yields ↑ 30–60bp) |
| Inflation-linked bonds | ↓ (breakevens ↓) | ↔ | ↑ | ↑↑ |
| Investment-grade credit | ↑ | ↔ | ↔ / ↓ | ↓ |
| High yield / private credit | ↑ | ↔ / ↓ | ↓ | ↓↓ (energy-intensive borrowers) |
| Commodities ex-energy | ↔ | ↔ | ↑ (freight-driven) | ↑↑ |
| Gold and reserve assets | ↓ | ↔ / ↑ | ↑ | ↑↑ |
| Gulf sovereign credit | ↑ (spreads ↓) | ↔ | ↓ | ↓↓ |
| Infrastructure (ports, pipelines, storage) | ↔ | ↑ | ↑↑ | ↑↑↑ (bypass build-out) |
| Real estate (Gulf, logistics) | ↑ | ↔ | ↓ Gulf / ↑ logistics | ↓↓ Gulf / ↑↑ logistics |
| Private equity (industrials, transport) | ↑ | ↔ | ↔ | ↓ (input-cost margin compression) |
| EM oil importers (FX, credit) | ↑↑ | ↔ / ↓ | ↓ | ↓↓↓ |
| Marine and specialty insurance | ↓ (premium normalises) | ↔ | ↑ (premium sustained) | ↑ premium / ↑↑ claims |
The single structural point for a universal owner: in three of the four branches, the same portfolio is simultaneously long the shock (energy, shipping, infrastructure, linkers, gold) and short it (airlines, chemicals, EM importers, long-duration credit). A universal owner cannot diversify out of a chokepoint because it owns both sides of it. What it can do is know which side is larger, and the answer depends almost entirely on infrastructure and inflation-linked exposure — the two lines that move the same way in the two tails that together carry 65% of the Desk's weight.
Second- and Third-Order Effects
Insurance is the transmission mechanism, not the price of oil. Hormuz war-risk cover has moved from 1–3% of hull value to 7.5–10%. Marcus Baker, Marsh's global head of marine, cargo and logistics, told S&P Global on 22 July: "there is a danger that the market starts to just pull their horns in quite a bit in terms of actually offering cover." Global hull war capacity is $2.5bn–$3bn. If underwriters withdraw, the strait closes commercially regardless of what any navy or any memorandum says. Watch capacity, not diplomacy.
Refining, not crude, is where the shortage bites. July global refinery throughput was 80.9 mb/d, nearly 5 mb/d below a year earlier; Atlantic Basin diesel, jet and gasoline cracks hit all-time highs in July and rose further in August. Diesel exports from Russia, the Middle East and Asia are 1.3 mb/d lower year on year — about 20% of global seaborne trade. Jet exports from those regions are down around 34% of global trade. A universal owner exposed to airlines, freight, agriculture and construction is exposed to the crack, not to Brent.
Central banks are already conditioning on it. The ECB held on 23 July with the statement that "the full inflationary impact of the energy shock has yet to play out" and that its rise since the conflict began "is likely to keep inflation well above target into the first half of 2027." The Bank of England held 6–3 on 29 July with three members preferring a hike, noting that "monetary policy cannot influence energy prices but is being set to ensure that the economic adjustment to them occurs in a way that achieves the 2% inflation target sustainably." The Reserve Bank of India held on 5 August citing "conflict in West Asia, volatile oil prices." The Federal Reserve held 3.50–3.75% on 29 July with three dissents in favour of a hike. For a pension fund, the Hormuz question is a discount-rate question.
The bypass build-out is a decade-length infrastructure trade being priced in real time. Petroline's 5 mb/d design capacity to Yanbu, ADCOP's 1.5–1.8 mb/d to Fujairah, DP World's fifty-year Fujairah concession, ship-to-ship hubs off Oman: 3.5–5.5 mb/d of alternative-route spare capacity against ~20 mb/d of normal flow. It cannot substitute. It can, however, permanently shift where Gulf export value is captured — and the assets that capture it are exactly the infrastructure and real-asset exposures that sovereign funds have been building. Infrastructure reached 9.0% of total sovereign wealth fund assets in 2026, up from 4.9% in 2022 — the fastest-growing alternative asset class, per Invesco's 2026 study of 144 institutions managing about $29 trillion.
Reserve managers have already moved, quietly. OMFIF's Global Public Investor 2026 finds 51% of central banks citing protection against geopolitical risk as a motivation for holding gold, up eleven points from 2024, with 82% now holding physical gold against 71% a year earlier. Chokepoint risk is being expressed through reserve composition before it is expressed through any portfolio.
And the counter-signal, which matters. Gulf sovereign funds did not retrench. Global SWF's half-year data show GCC state investors committing a record $53.9bn across 108 deals in H1 2026 — a historical high, in the middle of the war. Saudi Arabia financed an SR160bn first-half deficit entirely with debt and touched no reserves. Whatever this shock is doing, it is not yet forcing the region's long-horizon capital to sell. If your thesis requires distressed Gulf selling, the data does not support it.
Energy investment is rotating, not surging. The IEA's World Energy Investment 2026 puts total energy investment at $3.4 trillion, with oil investment falling for a third consecutive year to below $500bn despite higher prices — lead times, supply chains and rig constraints cap the response outside the Middle East. IEA Executive Director Fatih Birol: "We are in the midst of the largest energy security crisis the world has ever faced – and I believe this will reshape investment strategies globally, with parallels to the major changes the energy world witnessed after the oil shocks of the 1970s." Grids approach $550bn, up about 20% year on year. The 1970s analogy is doing real work: the durable consequence of an oil shock is usually an electricity and efficiency build, not an oil build.
The Watch Dashboard
Fourteen indicators, with the threshold that would move the Desk's weights.
| # | Indicator | Current | Threshold that changes the model | Direction |
|---|---|---|---|---|
| 1 | PortWatch Hormuz 7dMA (chokepoint6, n_total) |
3.57 (16 Aug) | >30 for 8 straight weeks → Tail A; >60 → resolves | Both |
| 2 | Lloyd's List non-Iranian-linked weekly transits | 43 (10–16 Aug) | >150/week sustained | Upside |
| 3 | Hull war-risk premium, % of hull value | 7.5–10% | <3% → Upside; capacity withdrawal → Tail B | Both |
| 4 | Global hull war capacity | $2.5–3bn | Contraction below $2bn → Tail B | Down |
| 5 | TD3C VLCC MEG–China earnings | ~$510k/day (17 Aug) | <$150k/day → reopening being priced | Upside |
| 6 | Brent, FRED DCOILBRENTEU |
$95.29 (18 Aug) | <$75 sustained → Upside; >$130 → escalation | Both |
| 7 | Brent curve shape | Backwardated | Flat or contango at the front → supply returning | Upside |
| 8 | OVX crude volatility index | 47.17 (18 Aug) | <30 → normalisation priced | Upside |
| 9 | Global observed oil inventories (IEA OMR) | <7.9bn bbl, −410mb since Feb | A further 200mb draw → forced settlement pressure | Upside (via pain) |
| 10 | Gulf shut-in production (IEA) | 8.3 mb/d (July) | <4 mb/d → Base in play | Upside |
| 11 | Jebel Ali container throughput | ~10% of normal | >50% of normal → Upside | Upside |
| 12 | Oman mediation channel | "complex but continuing" (17 Aug) | A dated framework with sanctions relief → Upside | Upside |
| 13 | CENTCOM blockade status | Active since 14 July | Suspension → Upside; mining resumes → Tail B | Both |
| 14 | Second ADCOP line / Fujairah FID | Reported, no ADNOC disclosure | A sanctioned FID → Tail B hardens | Down |
Indicator 1 is the resolution series. Indicators 3 and 4 are the ones the Desk would act on first, because insurance closes the strait faster than politics reopens it.
Red-Team: How This Could Be Wrong
1. The metric could clear on measurement rather than on shipping. PortWatch warns that AIS spoofing, GPS jamming and dark transits have made the regional counts unreliable since late February; the EIA repeated the warning on 12 August. If a political settlement is accompanied by vessels switching their transponders back on, the seven-day average could jump for reasons that have little to do with tonnage. The Desk's own capacity check — 0.088 Mt/day in August against 2.877 in 2025 — is the cross-reference, and if the two ever diverge, believe the tonnage. This is the sharpest single objection and it argues the Desk's 5% is too low.
2. Three of five transition hazards were never observed, and two rest on one event each. The whole model is calibrated on a single truce that lasted four weeks. A reference class of one is not a base rate; it is an anecdote with a denominator. The specification envelope (13.3%–50.0%) is wide precisely because of this, and a reader who thinks a truce hardens into a settlement four times as readily as the Desk assumes gets 50% rather than 28%.
3. Non-linearity cuts against the Desk. The June response was fast: the monthly average went from 3.16 in May to 10.70 in June within weeks of the memorandum. Confidence, freight and insurance can re-price abruptly. If the true rebuild half-life is 1–4 weeks rather than 2–10, the simulation returns 7.4% for 2026 rather than 1.7% — more than four times the Desk's leg.
4. Iran's own economics argue for reopening sooner than the Desk allows. Iranian crude exports have collapsed to roughly 294 kb/d from 1.7 mb/d in 2025. In the 1980s Tanker War, Iran never closed the strait for exactly this reason. If the current closure is a bargaining position rather than a strategy, it ends when the bargain is struck, and that could be quick.
5. The Desk is disagreeing with a market that has money at risk. A 40-point gap against a traded contract is a claim that a market is badly mispriced. The base case for any such gap is that the Desk has made an error, not that thousands of traders have. The Desk's defence is the 26.71 datum — but a market participant might reasonably say the memorandum was a poor test, undermined from the start by the withdrawal of sanctions waivers three weeks in, and that a proper agreement is a different animal.
What would falsify the call fastest: a successor agreement carrying actual sanctions relief, followed within four weeks by war-risk premiums under 3% of hull value. If both happen, the Desk's 5% is wrong by an order of magnitude and this edition should be read as a case study in over-weighting a single failed experiment.
Source Ledger
Forty sources inspected for this edition. "Moves the model" flags the ones that changed a probability.
| # | Source | Date | Data point used | Conf. | Moves the model |
|---|---|---|---|---|---|
| 1 | IMF PortWatch — Daily Chokepoints, chokepoint6 |
retrieved 20 Aug 2026 | Hormuz daily transit calls 2019-01-01→2026-08-16, 2,785 rows; 7dMA 3.57 on 16 Aug; 2025 mean 75.16 | H | Yes — resolution series |
| 2 | IMF PortWatch — Daily Chokepoints, chokepoint1 / chokepoint4 |
retrieved 20 Aug 2026 | Suez 2023 mean 73.61 → 2026 YTD 40.58 (−44.9%); Bab el-Mandeb 73.73 → 34.62 (−53.0%) | H | Yes — base rate |
| 3 | IMF PortWatch — disruptions database | retrieved 20 Aug 2026 | RED SEA TENSIONS from 2023-12-16, todate null (978 days); HORMUZ-26 from 2026-03-01, null |
H | Yes |
| 4 | Lloyd's List Intelligence — Strait of Hormuz Brief | 19 Aug 2026 | 73 transits 10–16 Aug vs 91; non-Iranian-linked 43 vs 60; ADNOC $1.3bn; DP World $100m/month; TD3C >$520k/day; CENTCOM 64/3/2 | H | Yes |
| 5 | Lloyd's List Intelligence — Strait of Hormuz Brief | 12 Aug 2026 | Rezaei's terms for reopening; insurer claims $1.5–2bn from ~70 casualties; container volume loss | H | Yes |
| 6 | IEA — Oil Market Report, August 2026 | 12 Aug 2026 | Supply −4.3 mb/d in 2026 to 102 mb/d; 8.3 mb/d Gulf shut in; throughput 80.9 mb/d; stocks <7.9bn bbl, −410mb since Feb; North Sea Dated $96.80 end-July | H | Yes |
| 7 | IEA — Strait of Hormuz factsheet | Feb 2026 | Petroline 5 mb/d design; ADCOP 1.5–1.8 mb/d; alternative-route spare 3.5–5.5 mb/d; Hormuz LNG ~20% of global trade | H | Yes |
| 8 | IEA — World Energy Investment 2026 release | 28 May 2026 | $3.4tn total; oil investment below $500bn, third consecutive fall; grids ~$550bn; Birol quote | H | No |
| 9 | EIA — Short-Term Energy Outlook | 11 Aug 2026 | "near pre-conflict averages in early 2027"; 0.6 mb/d residual through 2027; Brent $69 avg 2027; Bab el-Mandeb 5.4→8.1 mb/d | H | Yes — expert prior |
| 10 | EIA — Global energy security data | 12 Aug 2026 | LNG through Hormuz 10.5 → 0.8 bcf/d; Cape route 6.0 → 9.7; AIS reliability warning | H | Yes |
| 11 | EIA — World Oil Transit Chokepoints | 2026 | ~20 mb/d through Hormuz in 2025, ~20% of world petroleum liquids consumption | H | Yes |
| 12 | EIA — Crude oil supply disruptions: how long can they last? | 30 Mar 2011 | Kuwait restored in <4 years; Iraq never; Iran 1979 −3.9 mb/d across 1978–81 | H | Yes — base rate |
| 13 | EIA — Today in Energy: outage duration | 19 Oct 2017 | Political disruptions "often last for years"; technical ones "end within weeks" | H | Yes |
| 14 | EIA — Abqaiq attack | 23 Sep 2019 | 5.7 mb/d removed; loadings restored within days | H | Yes |
| 15 | Saudi Aramco — Abqaiq restoration statement | 17 Sep 2019 | Khurais within 24h; full capacity by end-September (16 days) | H | Yes |
| 16 | EIA — Russian crude re-routing | 7 Aug 2025 | Europe's share of Russian exports 51% (2020) → 12% (2024); India 50kb/d → 1.7 mb/d | H | Yes |
| 17 | European Commission — REPowerEU, 4 years on | 22 Apr 2026 | Russian crude 2% of EU crude imports in 2025 vs 20% in 2022 | H | Yes |
| 18 | FRED — DCOILBRENTEU |
18 Aug 2026 | Brent $95.29; 2026 max close $138.21 (7 Apr); trailing-60-session σ 0.0414 | H | Yes — calibration |
| 19 | FRED — MCOILBRENTEU |
Jul 2026 | Monthly Brent: Jan $66.60, Feb $70.89, Apr $117.29, Jul $83.76 | H | Yes |
| 20 | FRED — OVXCLS |
18 Aug 2026 | OVX 47.17 | H | No — dashboard |
| 21 | NPR — full text of the US–Iran memorandum | 18 Jun 2026 | The memorandum itself, signed 17 June 2026 | H | Yes — trigger |
| 22 | Al Jazeera — oil flows nearly tripled before the memorandum expired | 20 Aug 2026 | Expiry 17 Aug; Kpler 374m bbl in the window (6.1 mb/d vs 2.3 before); IMO ≥18 seafarer deaths; Minoan Dignity 18 Aug | H | Yes — trigger |
| 23 | US Central Command — blockade resumed | 13 Jul 2026 | Resumption 14 July; 140+ vessels redirected, 9 disabled in the first phase | H | Yes |
| 24 | US Central Command — Project Freedom | 3 May 2026 | 15,000 personnel, 100+ aircraft; the 2026 analogue of Earnest Will | H | No |
| 25 | gCaptain — VLCC earnings near $510,000/day | 18 Aug 2026 | TD3C ~$510k/day, highest since late June; $31m lump-sum fixture; war-risk high single digits of hull value | M | Yes |
| 26 | Splash247 — VLCC market "stop the press" | 20 Aug 2026 | MEG–China ~$510k/day, some owners ~$550k; modern VLCCs above $130m; ADNOC L&S nine secondhand | M | Yes |
| 27 | Splash247 — VLCC asset prices defy gravity | 7 May 2026 | 5-year-old VLCC $9m above newbuild; resales 21–35% over newbuild | M | Yes |
| 28 | S&P Global — Marsh on Hormuz war-risk cover | 22 Jul 2026 | Premiums 1–3% → 7.5–10% of hull value; hull war capacity $2.5–3bn; Marcus Baker quote | H | Yes |
| 29 | Al Jazeera — shipping insurance rates | 23 Jul 2026 | $77.96/t for a 270,000t Gulf–China cargo vs a five-year average of $18.91/t; ~$21m per transit | M | Yes |
| 30 | Lloyd's Market Association — JWLA-033 | 3 Mar 2026 | Bahrain, Djibouti, Kuwait, Oman, Qatar added to the Joint War Committee listed areas | M | No |
| 31 | DP World — H1 2026 results | 13 Aug 2026 | H1 throughput 42,826k TEU (−5.7%); ex-Jebel Ali +5.4%; revenue $12,715m (+13.1%) | H | Yes |
| 32 | DP World — Fujairah terminals concession | 22 Jul 2026 | 50-year concession, two terminals, construction 24–30 months | H | Yes |
| 33 | Saudi Aramco — Q2/H1 2026 results | 4 Aug 2026 | "Continued utilization of East-West Pipeline to secure flows"; no throughput figure disclosed | H | No |
| 34 | ECB — monetary policy statement | 23 Jul 2026 | Rates held; "the full inflationary impact of the energy shock has yet to play out"; "well above target into the first half of 2027" | H | Yes |
| 35 | Bank of England — MPC minutes | 30 Jul 2026 | Held 6–3 at 3.75%; energy adjustment language; Brent $84 conditioning assumption at 28 July close | H | Yes |
| 36 | Reserve Bank of India — MPC resolution | 5 Aug 2026 | Repo held 5.25%; "conflict in West Asia, volatile oil prices" named as downside risks | H | No |
| 37 | Goldman Sachs 2027 Brent forecast, relayed | 23 Jul 2026 | 2027 Brent $75 assuming Hormuz open; alternative "$120 by 4Q26, $100 avg 2027, if Hormuz remains disrupted" | M | Yes — expert prior |
| 38 | Wood Mackenzie, relayed by AOGR | Jun 2026 | 70% of shut-in volume returns within 3 months of reopening, 90% within 6; base case assumed August normalisation (superseded) | M | Yes — expert prior |
| 39 | Preduck — Strait of Hormuz odds · CNBC, 8 Jul · CNBC, 24 Jul | Jul–6 Aug 2026 | Kalshi's 60-transit 7dMA definition; Jan-2027 contract 45¢, Jul-2027 65¢ (6 Aug); no live quote obtained today | M | Market leg only — never a model input |
| 40 | Beccue, Huntington, Leiby & Vincent, Energy Policy 115 | 2018 | Expert elicitation: an 8 mb/d chokepoint disruption "short or long at 50% probabilities, but never very long" — quote at p.17 of the DOE accepted manuscript, not in the OSTI landing-page abstract | H | Yes — as a prior, not a frequency |
| 41 | Strauss Center — the Tanker War | retrieved 20 Aug 2026 | Hormuz never closed 1984–88; Gulf shipping down ~25% at worst | M | Yes |
| 42 | Invesco Global Sovereign Asset Management Study 2026 | 29 Jun 2026 | 144 institutions, ~$29tn; infrastructure 9.0% of SWF assets, up from 4.9% in 2022 | H | No |
| 43 | OMFIF — Global Public Investor 2026 commentary | 28 Jul 2026 | 51% of central banks cite geopolitical protection as a gold motivation, +11pp vs 2024; 82% hold physical gold | H | No |
| 44 | Global SWF H1 2026, relayed by The National | 1 Jul 2026 | GCC sovereign funds committed a record $53.9bn across 108 deals in H1 2026 | M | Yes — counter-signal |
| 45 | Investing.com — backwardation and cracks | 19 Aug 2026 | Front-month WTI and Brent meaningfully above deferred; Brent $91–92 | M | Yes |
Inspected but not used, and why. A reported second ADCOP line (~$3bn, ~3.6 mb/d by 2027) appears only in secondary trade coverage with no ADNOC disclosure — carried in the watch dashboard as unverified, never as a figure. QatarEnergy's force majeure and the "3–5 years to repair" line for Ras Laffan trains 4 and 6 could not be traced to a QatarEnergy-hosted statement — carried at low confidence in the evidence table and nowhere else. A widely-circulated Nicolai Tangen quotation about Hormuz could not be confirmed in any inspected page and is not printed. Port-authority capex figures for Sohar, Duqm, Khor Fakkan and the Jeddah land bridge circulate in trade blogs without a primary source and are excluded. A "record $102.20/bbl diesel crack" attributed to 17 August could not be verified against a price assessor and is excluded; the record-margin claim rests on the IEA's own August report instead.
Methodology
Probabilities are the UAO Probability Desk's, weighted across base-rate, expert-prior and simulation inputs under a written aggregation rule (base rate 0.35, expert priors 0.30, simulation 0.35; deviations from the standard 0.40/0.30/0.30 are logged above with reasons). The simulation is a 50,000-path Monte Carlo, seed 20260820, numpy 2.2.6, shipped as mc.py with mc_out.json; it is bit-reproducible. MiroFish was not run and no multi-agent simulation is implied. Base-rate arithmetic on the Strait of Hormuz, the Suez Canal and Bab el-Mandeb was computed by the Desk directly from the IMF PortWatch Daily Chokepoints dataset (2,785 daily observations per chokepoint, 1 January 2019 to 16 August 2026, retrieved 20 August 2026); those figures are the Desk's calculations, not the IMF's published statistics. Brent figures are FRED DCOILBRENTEU and MCOILBRENTEU. Methodology available on request. Weights sum to 100% and are rounded to the nearest 5%.
This report is for informational and research purposes only and does not constitute investment, legal, tax, or financial advice. Editorial scenario analysis only. Not investment, actuarial, or geopolitical advice.
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