Iran's 'Zero Hormuz' Warning May Be Theater - But 26 Ships a Day Still Signals a Supply Squeeze

Traffic is recovering, but Hormuz still looks more like a narrowed pipe than a normal chokepoint

Iran's "zero Hormuz" rhetoric is probably exaggeration. Latest tracking shows vessel traffic is up after months of stagnation, although some ships manipulate their GPS trackers during transit, so headline counts should be treated cautiously. Even so, markets do not need a full closure to feel pressure. They only need enough friction to raise insurance, delays, and rerouting costs.

The better benchmark is pre-war flow. Before the war, the hundred-plus ships traversing the strait before the war were moving through daily. Traffic remains well below that level. That is not a locked gate, but it is still a narrowed pipe, and in a tight market that can be enough to keep a risk premium alive.

The pricing signal matters for the same reason. After the escalation, Gas prices in the U.S. spiked in March as a result of the war, increasing more than 40% and topping an average of $4 per gallon. Prices cooled at times in April, then reached new highs in May. Investors may be tired of apocalyptic headlines, but the underlying data still argues for caution: a partial chokepoint can still be a pricing event.

The real signal is control, not just closure

IRGC coordination makes passage the scarce asset

The market is no longer trading a simple open-or-closed Hormuz outcome. It is trading who grants passage. The IRGC said it coordinated the transit of 26 vessels through the Strait of Hormuz in the past 24 hours, adding that traffic is being carried out with permission and in coordination with the IRGC Navy. Iran's PGSA then published a map of a controlled maritime zone that vessels will not be able transit without its authorisation. That turns Hormuz into something closer to a negotiated corridor than a freely open waterway.

That matters because permission changes pricing, not just distance. A chokepoint does not have to stay fully closed to hurt markets. It only needs to create delays, inspections, higher insurance, and the risk that approvals stall when diplomacy breaks down. With talks between Washington and Tehran over the resumption of traffic through the narrow waterway remain stalled, that uncertainty can stay embedded in oil and shipping longer than investors expect.

Why even 26 approved transits can still matter

That headline number can mislead. About a fifth of global energy exports used to pass through the strait before the war, so even a modest number of approved transits can matter if the broader system is already running lean. In that context, 26 ships is less a ceiling than a sign that passage is being rationed.

The transmission channel is logistical, not theatrical. Fewer approved transits can mean tighter vessel availability, longer voyages, less flexible delivery windows, and higher effective freight costs. In a tight market, that is enough to sustain a risk premium. The question is not whether Hormuz is 100% closed. It is whether flow is being managed through a political valve that can tighten again without warning.

Carrier rerouting already shows the strain

Shipping lines are already treating the risk operationally. As of March 1, 2026, several carriers had halted or rerouted vessel movements through the Strait of Hormuz and the Suez Canal over security concerns. Among the changes reported were:

• CMA CGM instructed vessels in the Persian Gulf to take shelter and suspended Suez Canal transits, rerouting affected services around the Cape of Good Hope
• Maersk temporarily suspended vessel crossings in the Strait of Hormuz
• Hapag-Lloyd suspended transits through the Strait of Hormuz until further notice
• MSC maintained widespread rerouting of east-west services around Africa
• Nippon Yusen (NYK Line) instructed vessels to cease transiting the Strait of Hormuz following the escalation

The watchpoint is straightforward: if traffic stays in the low 20s or 30s and passage still depends on permission, oil and shipping costs can still move sharply without any new dramatic closure headline. If approvals broaden and carriers stop defaulting to longer routes, the premium can unwind faster.

What traders should watch next

The near-term setup is less about a dramatic full closure and more about changes in access, timing, and rerouting discipline.

Crude: whether the market keeps absorbing longer hauls

If traffic remains near the recent approved-transit pace and talks remain stalled, the premium can linger. A fresh squeeze would likely show up first in sentiment and forward spreads. The reason investors still care is that prior escalation already produced U.S. gasoline prices increased more than 40% before later relief and subsequent highs.

Tankers: whether rerouting keeps tightening available capacity

Carriers have already halted or rerouted vessel movements through Hormuz and Suez, with major lines sending traffic around the Cape of Good Hope. That pushes tonne-miles higher and can tighten available supply. If rerouting holds, bunker demand may stay firm even if the headline flow looks calmer than the rhetoric suggests.