Skip to content
Briefings are running a touch slower this week while we rebuild the foundations.See roadmap
Iran Conflict 2026
21MAR

Hormuz down 80%; four ships in five gone

3 min read
07:22UTC

Vessel traffic through the world's most important oil chokepoint fell 80%, worsening from 70% in 24 hours. OPEC+'s emergency output increase replaces 1.3% of the lost throughput.

← Back to Trump floats wind-down, deploys 2,200 moreJump to analysis ↓
ConflictDeveloping
Key takeaway

Pipeline bypass capacity — Saudi Arabia's East-West Petroline and the UAE's Habshan–Fujairah pipeline combined — can offset at most 30–40% of normal Hormuz flow, meaning 60–70% of the current reduction is structurally unrecoverable until the strait reopens regardless of what alternative routes are activated.

Vessel traffic through the strait of Hormuz has fallen 80% below normal levels, a further deterioration from the 70% decline recorded on 1 March . The acceleration — ten percentage points in 24 hours — reflects the cumulative effect of shipping line withdrawals, P&I insurance cancellations, and Iran's demonstrated willingness to strike commercial vessels.

Roughly 20 million barrels of oil per day transited Hormuz before the conflict — approximately one-fifth of global consumption. At 80% reduction, roughly 16 million barrels per day of transit capacity has been removed from the market. OPEC+'s emergency 220,000-barrel-per-day production increase replaces 1.3% of the lost throughput. CMA CGM's emergency surcharges of $2,000–$4,000 per container and the all-time record VLCC freight rates are consequences of this contraction, not its cause — the chokepoint itself is closing.

Three tankers were attacked near the strait on 28 February — the MV Skylight, MKD Vyom, and Sea La Donna . An Indian mariner was killed on 1 March when a surface drone detonated against the MKD Vyom's hull 52 nautical miles northwest of Muscat — the first Indian national to die in the conflict. The remaining 20% of traffic likely consists of vessels already in transit when conditions deteriorated, ships flagged to non-belligerent states, or tankers operating under government rather than commercial insurance. Iran has now degraded all three pillars of The Gulf's energy export architecture — production at Ras Laffan, refining at Ras Tanura, transit through Hormuz . The trajectory is toward near-total closure.

Deep Analysis

In plain English

Normally about 20% of the world's traded oil passes through the Strait of Hormuz — a narrow channel between Iran and Oman with no practical alternative route at comparable volume. Four-fifths of that traffic has now stopped. Unlike a road with a detour, pipelines that could reroute exist but can carry at most a quarter of normal flow. The world's oil supply has effectively lost access to one of its most critical arteries, and the gap cannot be filled by alternative routes even if they operate at maximum capacity.

Deep Analysis
Synthesis

The pipeline bypass capacity figures are the critical missing element in assessing how much of the supply reduction can be mitigated independently of Hormuz reopening. Saudi Arabia's East-West Petroline (~5 million b/d to Yanbu) and the UAE's Habshan–Fujairah pipeline (~1.5 million b/d) together provide approximately 6.5 million b/d of bypass capacity against normal Hormuz flow of 17–21 million b/d. Even at full utilisation, these bypass at most 30–40% of normal volume. The IEA's emergency stockholding mechanism provides approximately 90 days of buffer at current disruption rates — a hard deadline after which physical supply tightness becomes unavoidable without Hormuz reopening.

Root Causes

Charter party contracts contain force majeure and war risk clauses that give operators legal cover — and sometimes obligation — to suspend voyages when an area is formally designated a war zone. Once a critical mass of operators invokes these clauses, remaining operators face asymmetric exposure: full risk with no commercial advantage from being among the few still transiting. This game-theoretic dynamic produces rapid, cascading market exits rather than gradual linear responses.

Escalation

The 10-percentage-point single-day deterioration from 70% to 80% follows an accelerating, not linear, pattern consistent with a market cascade: each operator that exits reduces the information available to remaining operators about safe transit, making further exits more likely. Absent a military escort programme or insurance market intervention, continued deterioration toward 90%+ within 48–72 hours is more probable than stabilisation.

What could happen next?
  • Consequence

    Pipeline bypass capacity covers at most 30–40% of normal Hormuz flow; the remaining reduction is structurally irreplaceable until the strait reopens, regardless of bypass utilisation rates.

    Immediate · Assessed
  • Risk

    The market cascade trajectory makes a near-total cessation of commercial Hormuz traffic probable within 48–72 hours absent a military escort programme or insurance market intervention.

    Immediate · Suggested
  • Risk

    IEA strategic reserves provide approximately 90 days of buffer at current disruption rates, after which physical supply tightness becomes unavoidable without Hormuz reopening.

    Short term · Assessed
  • Precedent

    An 80% disruption of Hormuz traffic likely exceeds any previous recorded figure for this strait, establishing a new benchmark for what a confined maritime conflict can achieve against global energy infrastructure.

    Long term · Suggested
Sources:Al Jazeera·CNBC
Mentions:Russia →VLCC →Persian Gulf →CMA CGM →Ras Laffan Industrial City →Libya →Ukraine →Muscat →Saudi Arabia →National Security Council (Iran) →Time →Iran →Strait of Hormuz →Ras Tanura →
First Reported In

Update #14 · Natanz unverified; Hormuz sealed

Al Jazeera· 3 Mar 2026
Read original →
Causes and effects
Caused by
Hormuz down 70%; 150 tankers at anchor
Hormuz vessel traffic deteriorated from 70% decline to 80% decline as insurance withdrawal compounded military risk
Occurred 1 Mar 2026
Read story →
Iran strikes Saudi Ras Tanura refinery
Iran's strikes on production, refining, and transit infrastructure further suppressed Hormuz vessel traffic
Occurred 2 Mar 2026
Read story →
This Event
Hormuz down 80%; four ships in five gone
The 80% traffic decline removes roughly 16 million barrels per day of oil transit capacity from the market — a loss that OPEC+'s 220,000-barrel-per-day production increase cannot meaningfully offset, with the trajectory pointing toward near-total closure.
Led to
Last P&I clubs quit Gulf; Hormuz sealed
The 80% collapse in Hormuz traffic drove the remaining P&I clubs to issue cancellation notices, as continued coverage became commercially untenable.
Occurred 4 Mar 2026
Read story →
Goldman bets the war ends before summer
Hormuz traffic collapse (80% below normal) and the commercial closure drive Goldman's oil price forecasting, with the forward price implying partial reopening expectations
Occurred 4 Mar 2026
Read story →
Duqm fuel tank hit for the second time
With Hormuz vessel traffic down 80%, Duqm became one of the few remaining fallback routes for maritime operations, making it a strategic target for degradation
Occurred 3 Mar 2026
Read story →
European gas nearly doubles in one week
80% decline in Strait of Hormuz vessel traffic compounded the LNG supply disruption driving TTF prices higher
Occurred 3 Mar 2026
Read story →
US Gulf shipping cover for allies only
The 80% decline in Strait of Hormuz vessel traffic — driven by the insurance collapse and security threat — motivated the government insurance and Navy escort response
Occurred 4 Mar 2026
Read story →
Different Perspectives
Gulf shipping and insurance markets
Gulf shipping and insurance markets
With Hormuz and Bab el-Mandeb both hostile at once, war-risk underwriters face their first dual-chokepoint pricing problem; the rerouting hedge that absorbed one closure is gone for Israeli-linked hulls. Any deal that reopens Hormuz without a Houthi stand-down clause delivers only partial shipping relief.
Russia and China
Russia and China
Russia and China met IAEA chief Grossi jointly in Geneva on 5 June to coordinate an advance blocking position against Washington's censure resolution, the first documented instance of proactive pre-session obstruction rather than reactive post-vote dissent. Beijing's move came four days after OFAC designated Shanghai Qianye Energy under Iran energy sanctions.
Saudi Arabia
Saudi Arabia
Saudi Arabia was left out of the emergency $4.01 billion Patriot waiver Qatar received on 2 May as its own PAC-3 stocks ran near-empty from intercepting Iranian salvoes over Aramco facilities. Riyadh is on a standard 18-month FMS queue behind a production line booked through 2030, with no equivalent priority to Qatar's Al Udeid basing role.
Houthis (Ansar Allah)
Houthis (Ansar Allah)
The Houthis declared a complete ban on Israeli Red Sea navigation on 8 June and struck Jaffa, their first attack on Israeli territory since April, seven days after the Tasnim authorisation to activate other fronts including Bab el-Mandeb. The declaration put both chokepoints under hostile authority simultaneously.
Iran
Iran
Iran agreed the 9 June mutual halt after the Mahshahr exchange and coordinated with Russia and China to block Washington's IAEA censure resolution, using the Board as a second front while the bilateral pause held on the military one. Tehran's acceptance of the Lebanon carve-out contradicts the linkage position it stated on 1 June.
Benjamin Netanyahu and the IDF
Benjamin Netanyahu and the IDF
Israel struck the Karun Petrochemical plant at Mahshahr on 8 June over Trump's explicit objection, then agreed a halt with Iran the following day scoped on Israeli terms with Lebanon carved out. Netanyahu's posture is that the IDF will not accept Iranian missile factories as off-limits regardless of US diplomatic timelines.