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European Oil Markets
27JUL

Radio warnings close a second strait

3 min read
10:27UTC

Yahya Sarea declared Bab al-Mandab shut to Saudi shipping on Monday. Six vessels, among them the Chinese supertanker Xin Long Yang, had turned round inside 48 hours without a shot fired.

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EconomicDeveloping
Key takeaway

A radio broadcast closed Bab al-Mandab to Saudi shipping inside 48 hours, with no shot fired.

Yahya Sarea, military spokesman for Yemen's Houthis, announced a full maritime embargo on Saudi Arabia on Monday 20 July, effective immediately 1. Houthi forces began hailing vessels on open maritime frequencies near Yemen the same day, telling them the Bab al-Mandab was closed to Saudi traffic 2.

Bab al-Mandab is the strait between Yemen and Djibouti where the Red Sea meets the Gulf of Aden, and roughly a quarter of global container traffic passes through it. Six vessels had reversed course by Tuesday 21 July, according to Lloyd's List ship-tracking data. Among them was the Chinese Very Large Crude Carrier Xin Long Yang, which turned in the Red Sea rather than continue towards a Saudi port 3.

Houthi forces fired nothing, boarded nothing and stopped nothing. Rear Admiral Vasileios Gryparis commands Operation Aspides, the European Union's naval protection mission in the Red Sea. He said the Houthis "remain a threat to navigation despite not having attacked any merchant vessels since September 2025" 4. Holding the Strait of Hormuz shut has cost a great deal more: a naval blockade, Marine boarding parties putting armed personnel on foreign decks , and eleven consecutive nights of bombing.

Sarea framed the embargo as retaliation for Saudi Arabia's blockade of Yemeni ports and a Saudi strike on Sanaa airport. The Houthis say that strike was aimed at an Iranian aircraft carrying their leadership home from Ali Khamenei's funeral 5. Saudi Arabia's foreign ministry called the declaration false and a distraction from the group's "economic mismanagement and public discontent", and said The Kingdom would take "all necessary measures" to protect its ships 6.

Whether the six turnbacks answer the radio calls, the owners' own risk desks or both cannot be separated out from tracking data alone. No war-risk premium specific to Saudi-bound traffic has yet been established either. What can be said is that the traffic changed course within two days of a broadcast, and that nobody had to sail a warship to make it happen.

Deep Analysis

In plain English

The Houthis are an armed group that controls large parts of Yemen. On Monday they announced they would stop Saudi-bound ships from passing through the Bab al-Mandab strait, a narrow sea gap near Yemen that a huge share of world shipping uses to reach the Suez Canal. They have not fired on or boarded any ship. Instead, Houthi forces have been radioing vessels over open radio channels and warning them to turn back. Six ships did, including the Chinese supertanker Xin Long Yang. No vessel has been attacked, boarded or stopped. Shipping companies are cautious because insurance for sailing through this region has already become far more expensive during the wider war, so a warning alone is often enough to make a captain choose the longer, safer route.

Deep Analysis
Root Causes

Rerouting on a radio warning only works because the insurance market had already primed shipowners to treat any new threat as decisive. War-risk premiums for the region were running at 3-10% of hull value before this declaration, against roughly 0.25% before the war, according to Lloyd's List reporting; the Lloyd's Market Association has said capacity technically remains available and it is price and crew willingness, not a shortage of cover, that is doing the suppressing.

That pre-existing cost structure means a six-figure premium swing, not a missile, is enough to turn a tanker around; the Houthis are exploiting a market that was already primed to divert rather than demonstrating new military reach.

What could happen next?
  • Risk

    If the Houthis follow the 2023 Galaxy Leader precedent and escalate from radio warnings to an actual boarding or strike, war-risk premiums for the wider Red Sea corridor would likely reprice sharply, compounding the existing Hormuz premium.

  • Precedent

    A second chokepoint closed by declaration rather than force lowers the bar for further non-kinetic threats against shipping elsewhere in the region.

Sources:The War Zone·Al Jazeera
Mentions:Houthis →Yahya Saree →Bab al-Mandeb →Saudi Arabia →Operation Aspides →Strait of Hormuz →Riyadh →Lloyd's List →Galaxy Leader →Ali Khamenei →European Union →Yemen →Red Sea →VLCC →
First Reported In

Update #159 · A second strait closes by radio alone

The War Zone· 22 Jul 2026
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Causes and effects
Caused by
Marines start boarding ships off Iran
The forcible Hormuz naval blockade and boarding regime contrasts with the costless Bab al-Mandab closure achieved by radio alone.
Occurred 15 Jul 2026
Read story →
This Event
Radio warnings close a second strait
Two of the world's maritime chokepoints are now constrained at once, and the second one cost its enforcers nothing but a transmitter.
Led to
Houthis fire on the Saudi tanker Encelia
The 20 July radio-only closure of the Bab al-Mandab escalated into a missile strike on the Encelia.
Occurred 21 Jul 2026
Read story →
Tanker NCC Masa struck off Al-Shuqaiq
The NCC Masa strike follows the Houthi blockade declaration against Saudi-linked shipping.
Occurred 24 Jul 2026
Read story →
Different Perspectives
Asian buyers (India, Japan, China, South Korea)
Asian buyers (India, Japan, China, South Korea)
Asian refiners are absorbing 62% of Yanbu's 3.75m b/d flow, the bulk of Saudi Arabia's rerouted crude now clearing east rather than into the Atlantic basin. That destination split leaves Asian buyers more exposed to any single Yanbu-specific disruption than under the kingdom's normal multi-terminal export pattern.
Russia / Lukoil
Russia / Lukoil
Moscow loses the roughly $14-a-barrel legal headroom the frozen price-cap formula would otherwise have released toward $58, even as Urals trades below Russia's own $59 budget floor. The shadow-fleet insurance workaround the freeze leaves untouched remains the actual route sanctioned crude clears above $44 in practice.
European Union / Council
European Union / Council
Brussels adopted its 21st sanctions package on 23 July, letting boarding states confiscate and sell shadow-fleet cargo outright and freezing the G7 price cap's automatic adjustment to mid-2027, converting indefinite tanker storage into recoverable value for enforcers.
Freight and tanker desks
Freight and tanker desks
The Baltic Exchange's TD3C VLCC benchmark, most desks' reference for Gulf freight, prices a single-vessel voyage while Saudi shippers now pay for two Suezmax charters at roughly double the transit time. That gap leaves any book hedged purely on TD3C carrying unrecognised Suezmax basis risk on the bulk of Saudi rerouted volume.
Mediterranean refiners (Sines, Trieste, Augusta)
Mediterranean refiners (Sines, Trieste, Augusta)
Refiners already facing aframax rates up 198% month-on-month now watch Ain Sokhna draw 23% of Yanbu's rerouted crude through the same SUMED corridor they lean on for product backfill. Fujairah and ARA stocks near record lows leave little room to absorb a thinner Suez product flow.
Saudi Arabia
Saudi Arabia
Riyadh has rerouted its entire western-coast crude book through Yanbu and Suez since the 23 July Bab el-Mandeb embargo, absorbing a roughly $2m-per-voyage Suezmax premium on every diverted cargo. The kingdom's fiscal breakeven near $108 a barrel makes that freight cost, not the blockade itself, the more durable drag on export economics.