On March 1, 2026, U.S. strikes on Iran over the weekend revived fears that shipping through the Strait of Hormuz could be interrupted, potentially halting a large share of Gulf exports and sparking a sharp energy shock. The narrow waterway, which carried about 13 million barrels per day in 2025, is a strategic chokepoint linking major producers to international markets. Markets are braced for an initial price spike when trading resumes, but the deeper risk is whether any disruption becomes sustained and forces a structural supply squeeze. Industry and military movements now shape whether the impact will be a brief shock or a prolonged crisis with global economic consequences.
Key Takeaways
- About 13 million barrels per day moved through the Strait of Hormuz in 2025, equivalent to roughly 31% of all seaborne oil flows, according to Kpler data.
- Brent crude closed at $72.48 on Friday, up about 19% year-to-date; U.S. WTI settled at $62.02, roughly 16% higher for the year.
- Officials monitoring commercial traffic reported VHF radio messages from Iran’s Revolutionary Guards warning ships not to pass, though Tehran had not formally confirmed any closure order, Reuters reported.
- Analysts outline scenarios from limited Iranian export losses of up to 2 million bpd to a full Strait blockade that could remove large volumes of Gulf supply from markets.
- Some industry advisers estimated a significant chance of major conflict: one consultant had been advising clients that a U.S.-Iran conflict had around a 75% probability; another put the chance of the worst-case scenario — Saudi infrastructure attack plus complete Hormuz closure — at roughly 33%.
- In a severe disruption, experts warn oil could reach triple digits and LNG prices could revisit the 2022 highs, given the centrality of Gulf flows to global energy markets.
Background
The Strait of Hormuz sits between Oman and Iran and serves as the principal maritime route for crude and LNG leaving the Gulf for the Indian Ocean and beyond. Its narrow channel and the concentration of production on its northern and western approaches make it a natural strategic chokepoint. Over the past decades Iran has periodically threatened to close the passage in response to military or economic pressure, and the region has a history of incidents that temporarily disrupted shipping or raised insurance and security costs for shippers.
Global energy infrastructure and trade evolved since the 1970s, but dependence on seaborne exports from Saudi Arabia, Iraq, the UAE and other Gulf producers remains high. Strategic stocks such as SPRs, alternative pipeline routes and surging U.S. shale output provide buffers, yet they may be insufficient to offset a prolonged loss of Hormuz-transited volumes without severe price and economic consequences. Regional rivalries, proxy networks and the presence of international naval forces in the Gulf multiply the pathways by which a local clash could escalate or be contained.
Main Event
The immediate trigger this week was a series of U.S. strikes on Iranian targets, which officials and analysts said could prompt Iranian retaliation or action by its regional partners. Reuters reported that the EU naval mission Aspides logged VHF radio messages from Iran’s Revolutionary Guards warning that “no ship is allowed to pass the Strait of Hormuz,” though the Iranian government had not issued an official, formal closure order at the time of reporting. Such messages alone raise alarm among commercial operators and insurers and can lead to pre-emptive route changes or voyage cancellations.
Market participants expected an initial “knee-jerk” reaction when trading resumed on Sunday evening in New York, reflecting short-term risk premia and speculative flows. Industry sources cautioned that the more consequential outcome would be the duration and scope of any disruption: brief skirmishes typically provoke spikes and fast mean reversion, while a sustained blockade or active attacks on export infrastructure could force structural re-pricing of energy.
Analysts and veterans of prior crises noted that the scale of any escalation — whether confined to Iranian exports or widened to attacks on regional infrastructure — would determine the lost barrels and the length of elevated prices. Military escorts, convoy operations and rapid diplomatic de-escalation are all possible mitigants, but none eliminate the near-term volatility and the risk of longer-lasting market dislocation.
Analysis & Implications
In the near term, markets will price a range of outcomes: from localized disruptions and insurance premium rises to multi-week interruptions of seaborne flows. If disruption is limited to Iranian exports, the immediate global loss might be in the low millions of barrels per day, which many market participants would initially offset via releases from strategic reserves, higher output elsewhere, and floating storage. Such measures, however, are costly and finite.
A full closure of Hormuz would create a different calculus. With roughly 13 million bpd normally transiting the corridor in 2025, rerouting would be practically impossible for the majority of that volume; pipelines do not have the capacity to absorb equivalent flows and alternative shipping routes add time and cost. This mismatch could push Brent into triple digits in a sustained worst-case scenario as inventories are drawn down and demand-sensitive industries react to higher fuel and LNG prices.
Beyond energy markets, sustained high oil and gas prices would reverberate through inflation, global trade costs and central-bank policy choices. Emerging markets reliant on energy imports would face currency and balance-of-payments stress while oil exporters could see revenue windfalls that reshape geopolitical calculations. Conversely, prolonged disruption could accelerate demand-destroying behavior, fuel-switching in some regions, and political pressure in energy-importing countries to pursue rapid mitigation measures.
Comparison & Data
| Episode | Approx. peak price impact | Primary mechanism | Comparable lost flow |
|---|---|---|---|
| 1970s Arab oil embargo | Oil price quadrupling (1973–74) | Export embargo and production cuts | Unclear by modern bpd metrics |
| Potential 2026 Hormuz closure | Analysts warn triple-digit Brent | Physical blockade or attacks on shipping/infrastructure | Up to 13 million bpd transiting; Iranian exports ≈2 million bpd at risk |
The 1970s crisis was driven by coordinated export restrictions that produced persistent market strain; a modern Hormuz closure could be more severe in terms of volumes at risk because global seaborne trade and the share of Gulf output have both grown. The table above is a schematic comparison to illustrate mechanisms and scale rather than a precise historical accounting.
Reactions & Quotes
“At this point, it seems we are looking at a full-scale military conflict between the U.S. and Iran, which would be unprecedented and the trajectory impossible to assess.”
Vandana Hari, CEO, Vanda Insights (energy research firm)
Vanda Insights’ remark underscores the unpredictable nature of escalation and the challenge for market participants in pricing risk beyond short-term jolts. Analysts noted that if hostilities broaden, markets would move from speculative premium pricing to refocused assessment of lost production and logistics constraints.
“Early indications are of a broader scale attack on Iran, with counterattacks which could escalate to draw in multiple Gulf countries.”
Saul Kavonic, Head of Energy Research, MST Marquee
Kavonic framed a spectrum of outcomes that markets will initially price, from loss of Iranian exports to attacks on regional infrastructure and, in the extreme, a disruption of passage through Hormuz. He emphasized that military escorts and allied deployments would be a likely response to protect commercial shipping lanes.
“The worst-case outcome is an attack on Saudi oil infrastructure followed by a complete closure of the Strait of Hormuz.”
Andy Lipow, President, Lipow Oil Associates
Lipow’s scenario captures the compound risk that dents both production and export channels simultaneously, elevating the probability of prolonged supply shortages. He and other market watchers attached non-trivial probabilities to these tail risks, noting that policy responses and military developments will be decisive.
Unconfirmed
- There was no formal government confirmation from Tehran at the time that it had issued an official closure order for the Strait of Hormuz; reports referenced VHF warnings that had not been ratified.
- The scale and timing of any Iranian retaliation or wider regional counterattacks remain unclear and unverified publicly.
- Precise assessments of how quickly major consumers or producers would offset lost Gulf supply with inventory releases or output increases are estimates, not confirmed operational plans.
Bottom Line
Markets face a binary sensitivity: a short-lived spike followed by reversion if military and diplomatic measures limit disruption, versus a much deeper and longer shock if the Strait of Hormuz is effectively closed or if regional infrastructure is attacked. The defining variable is duration; a few days of disruption would be painful but manageable, whereas weeks to months of constrained flows would impose sustained price pressure and broader economic fallout.
Investors, policymakers and industry players should monitor military movements, official communications on shipping guidance, and inventory release decisions closely. Contingency plans such as coordinated SPR releases, naval escorts, and diplomatic channels can blunt immediate damage, but they do not eliminate the systemic risk inherent in losing a major maritime artery that still carries a sizeable share of global energy supply.