The week the ceasefire died

The 17 June ceasefire lasted four weeks on paper and less than that on the water. This week the United States renewed its blockade of Iran, expanded strikes into northern Iran and disabled a merchant ship attempting to run the cordon — the tanker BELMA, fired into her smokestack while sailing unladen toward Kharg Island, the first enforcement action of the renewed blockade. Tehran answered by threatening to halt energy exports altogether.

The observatory’s transit data states the consequence without adjectives: 115 transit calls through Hormuz in week 28, against a 2024–25 baseline of ~656 — 18% of normal, and another 90 calls lost week-on-week. Since the air war opened on 28 February, the strait has seen IRGC boarding parties, sea mines, and missile strikes on commercial hulls; what June’s ceasefire briefly restored — Saudi Arabia alone pushed ~34 million barrels through the strait in the recovery window — is now unwinding for the second time.

The market’s repricing is the sharpest signal. Hull war-risk cover for a Hormuz transit, 0.125–0.4% of vessel value before the crisis, now trades around 5% — on a $100m VLCC, a $6m premium per voyage, when cover can be found at all: several markets simply withdrew, pushing governments toward insurer-of-last-resort roles. Freight followed: the VLCC index cleared $420,000 a day, with spot fixtures reported near $470,000 and Gulf time-charter equivalents roughly doubling inside a week. Chinese and Indian state refiners are failing to fix tonnage at any workable rate, and New Delhi has asked owners to stop deploying Indian seafarers on Hormuz voyages — a crew-supply constraint that will outlast any single strike.

The reading: this is no longer a risk-premium story but a capacity story. VLCC liftings through the strait are down roughly a third while voyages lengthen, which tightens effective tanker supply worldwide — the mechanism by which a regional blockade becomes a global freight event. Watch two numbers next week: the transit count against the 115 floor, and whether any hull market re-quotes below five points. Neither moved the right way this week.

While attention sits on Hormuz, the Red Sea has quietly consolidated into the market’s structural state. The observatory’s rerouting index — Cape of Good Hope transits divided by Suez transits — printed 2.2 in week 28: the long way round carries more than twice the short way’s traffic, nineteen months into the diversion. Bab el-Mandeb held at 226 weekly calls (−12), a corridor functioning at a fraction of its design load without further shock.

The forward picture matches: carriers keep Cape routing as the default for Asia–Europe services and the industry consensus now runs through at least 2027, with Suez’s share of east–west volumes stuck near 18.7% against ~80% pre-crisis. The 10–14 added days and ~3,500 added miles per round voyage are no longer an exception being absorbed — they are the baseline against which fleets, schedules and bunker contracts have been rebuilt.

The novel wrinkle is relative risk. With Hormuz now the most dangerous water on earth, box operators exiting the Gulf are re-examining the Red Sea — a corridor priced as uninsurable in 2024 becomes, by comparison, merely expensive. For underwriters this is the week’s quiet lesson: war-risk zones are not rated in isolation but against each other, and a blockade in one strait re-prices three others.

The sharpest single move in this week’s transit table is not in the Middle East: Taiwan Strait, −282 calls week-on-week to 1,454. The proximate cause is meteorological, not military — Typhoon Bavi crossed Okinawa and Taiwan before landfall in Zhejiang, suspending ferries, clearing anchorages and pushing Chinese hulls out of exposed ports.

The geopolitical layer still deserves the file note. Bavi’s passage coincided with Chinese coast-guard vessels entering waters that sharpened friction with Japan, PLAN activity around Taiwan trending upward, and the opening of the China–Russia “Maritime Joint 2026” exercise in the Yellow Sea. None of it moved commercial traffic the way 90 knots of wind did — a useful calibration for anyone modelling what an actual interdiction of the strait would look like against a baseline of ~1,700 weekly calls.

Expect the series to mean-revert within two weeks; if it does not, the residual is the number to explain.