By: Arash M. Akbari
Introduction
The spectre of open conflict caused by Israeli’s offensive illegal attack on Iran—or the yet limited confrontation between Iran and the United States—poses immediate and profound ramifications for global energy markets. At the heart of this nexus lies the Strait of Hormuz, through which approximately 18–20 million barrels per day of crude, condensates, and liquefied natural gas transit—nearly 20 percent of global oil demand.¹ In an environment where the market has grown desensitized to recurrent geopolitical tensions,² the prospect of Iran militarily closing the Strait signals one of the few shock scenarios still capable of disrupting equilibrium in supply and unleashing price surges.³ This essay analyses four domains:
- Immediate impacts on oil prices and volatility;
- Market instability mechanisms, including supply chain disruptions and risk premiums;
- OPEC and OPEC+ responses aimed at price stabilization, including coordination and production adjustments;
- Iran’s role and strategic logic, particularly its potential to close the Strait and how it fits within its broader political narrative.
The analysis is underpinned by a preference for Iranian strategic agency—recognizing both the existential insecurity driving Iran’s choices and the financial prudence often guiding its actions—while maintaining academic rigor and symmetrical argumentation.
- Immediate Impacts: Price Spikes and Market Reactions
Historically, geopolitical flare-ups in the Middle East have triggered immediate oil price escalations, even when actual supply remained unaffected.⁴ The 1973 OAPEC embargo and the 1979 Iranian Revolution provide salient precedents: in each case, prices more than doubled despite moderate production declines.⁵ Similarly, during the current hostilities, Brent crude surged from the high‑$60s into the $70–78 range as tensions escalated.⁶ That volatility reflects price setting driven by fear and potential rather than confirmed supply loss.⁷
Oil price dynamics in this context are shaped by two forces:
- Immediate risk premium: Market participants add a buffer ($5–15/bbl) to account for potential supply disruptions, derived from algorithmic trading and speculative hedging.⁸
- Structural supply vulnerability: With 20 percent of oil passing through Hormuz and only limited pipeline alternatives—Saudi Arabia’s East–West (~5 Mb/d), UAE’s Habshan–Fujairah (~1.5 Mb/d), and Iraq-to‑Turkey (~2–3 Mb/d)—any disruption unleashes a classic chokepoint crisis.⁹
Analyses by Goldman Sachs, Oxford Economics, and Cohen & Steers suggest that a full closure of Hormuz could push Brent above $100‑130 per barrel, with initial jumps of $40‑60/bbl in the days following—a level that would reverberate through global inflation and supply chains.¹⁰ These projections hold even absent structural supply shocks, underlining the power of perception in today’s hyper‑connected markets.
- Market Instability: Supply Shock Mechanics and Economic Fallout
2.1 Chokepoint Disruption & Strategic Stock Releases
A full Iranian blockade of Hormuz would sever exports not just from Iran but from Saudi Arabia, Kuwait, Iraq, and the UAE—a collective loss of ~15–18 Mb/d of supply.¹¹ Although the IEA and OECD maintain strategic petroleum reserves to blunt shocks, the speed of price increases would likely outpace organized releases.¹² Moreover, re-routing via pipelines involves capacity limits and would be prohibitively costly in volume and logistics.¹³
Consequently, a Hormuz crisis would set off a chain of economic consequences:
2.2 Risk Premium Momentum
Even threats against Hormuz without closure heighten volatility. Since 2019, markets have entered a “prove-it” posture; traders demand confirmation of disruption before fully pricing in scenarios.²⁸ As such, only aggressive action—like a prolonged blockade—would sustain spikes. Regardless, market responses typically overshoot initial fundamentals, heightening risk.²⁹
- OPEC and OPEC+: Managing the Shock
3.1 Spare Capacity as Emergency Damping
OPEC+ (which includes Russia plus additional non‑OPEC producers) currently retains ~5–5.5 Mb/d of spare capacity, much in Saudi and UAE hands.³⁰ In response to emerging imbalance, OPEC+ has historically increased output to stabilize price fluctuations. Yet this spare capacity lies physically behind the same chokepoint it seeks to offset; a Hormuz closure renders such capacity inaccessible, undermining its utility.³¹
3.2 Coordination, Production Cuts, & Market Signalling
Even amid internal tensions, OPEC+ managed to agree on output adjustments: 548 kb/d uplift scheduled in August 2025, undoing temporary cuts from late 2023.³² This signals intent—to reassure markets—but may lack teeth if physical access to barrels is jeopardized by a closed Strait.³³
Beyond quantities, OPEC+ often coordinates via public messaging: affirming stability, discouraging panic, and signalling willingness to act if supply is disrupted.³⁴ Yet this approach may fall short when the chokepoint itself, rather than output levels, is under threat.
3.3 Market Limitations & Non‑OPEC Offsets
An oft-cited rationale for Iran (and other Gulf states) to avoid closing Hormuz is that any blockade will mobilize non‑OPEC production—especially U.S. shale.³⁵ U.S. SPR releases, spot market sourcing, and pipeline re-routings (e.g., around South Africa via VLCC sea routes) would reduce the global impact.
Even with full Hormuz closure, shale could respond within months—though not immediately—or be hedged at higher prices.³⁶ Thus, while OPEC+ seeks price self-management, its mechanisms have limits against chokepoint-induced shocks.
- Iran’s Calculus: Political Leverage Versus Economic Self‑Harm
4.1 Hose of Deterrence, Not Continuity
Iran’s leadership views even the threat of closure as a powerful deterrent—far more so than actual execution. The Parliamentary vote on June 22, 2025, to authorize closing Hormuz if attacked, signalled strategic seriousness without immediate commitment.³⁷ Iranian analysts note that full closure would shut off its own revenues and choke access to its sole export channel.³⁸
Hence, closure should be understood as:
- A bargaining chip to deter further strikes on Iranian soil—avoiding escalation;
- A means to rally domestic unity around national sovereignty;
- A test of international resolve: would global powers risk war to keep Hormuz open?
In short, Iran’s posture is defensive, not expansionist nor offensive and certainly a response to Israeli and American attack.
4.2 National Resilience and Oil Revenue Risk
Despite sanctions, Iran’s oil production remains near 3.5 Mb/d, with ~1.3–2.1 Mb/d exported, largely to China.³⁹ The Khark Island terminal accounts for ~90 percent of those exports.⁴⁰ Iran has grown its infrastructure and diversified export logistics.⁴¹ But closing Hormuz would indiscriminately punish both its economy and its allies—testing the resilience of China, India, and others.⁴²
In this light, the rational Iranian calculation is calibrated: preserve deterrence, demonstrate resolve—and avoid mutual economic destruction.
- Fairness to Iran’s Position
A sympathetic reading of Iran’s political logic stresses several points:
- National sovereignty: Israel and U.S. strikes on Iranian territory are viewed as existential threats. Hormuz blockade authority is a means of defensive escalation control.
- Economic caution: Iran’s reliance on oil revenue makes harmful strikes counter‑productive; thus, closure authorization is more symbolic than operational.
- Diplomatic signalling: Threats heighten urgency for diplomatic de-escalation, potentially creating leverage in mediation attempts (e.g., China).
- Market consciousness: Iranian strategy is informed by the knowledge that actual closure harms global economies—including Iran’s—and that OPEC+ mechanisms can adapt in mild disruption scenarios. Hence restraint is more logical than reaction.
- Conclusion
The Iran–Israel conflict—and any associated U.S. involvement—places one of the world’s most critical energy choke points in jeopardy. Market responses have been immediate but measured: modest price spikes driven by risk premiums, but no structural shortages yet.
The path to major instability lies through the Strait of Hormuz. A closure would bypass traditional OPEC+ price-balancing tools; spare capacity becomes irrelevant when the chokepoint is inaccessible. In such a case, global Brent prices could tumble past $120, possibly reaching $150 under extended closures—triggering inflationary shocks and growth slowdowns. Iran’s strategic signalling—authorizing but not enacting a blockade—reflects a nuanced approach: leveraging deterrence without self-inflicted damage. OPEC+ is unprepared to offset chokepoint risks and remains a limited actor in true geopolitical crisis.
In sum, Iran’s political approach in leveraging Hormuz threats can be seen as both rational and proportional—a defensive posture calibrated for maximum deterrence at minimal cost—fitting within both national interests and global markets’ structural constraints.
References:
¹ See IEA data on Hormuz transit volumes: Piero Cingari, Euronews, June 16, 2025.
² Ben Cahill, CSIS, July 10, 2025.
³ Goldman Sachs and Oxford Economics modeling: Factum Obscura, Telesur, June 2025.
⁴ Historical analogues: 1973 OAPEC embargo and 1979 Iranian Revolution; see Wikipedia 1973 oil crisis and 1979 oil crisis.
⁵ Ibid.
⁶ Brent spikes to $78: Financial Times, China–Iran dynamics.
⁷ “Markets shrug off geopolitical risk…”: Ben Cahill, CSIS.
⁸ Risk premiums in Zadeh, DiscoveryAlert; compute $5–15 buffer per bbl.
⁹ Cingari; Factum Obscura; Telesur.
¹⁰ Goldman Sachs, RBC, Oxford Econ: Factum Obscura; Telesur; Cohen & Steers.
¹¹ Cingari; RUSI; Strait capacity referenced across IEA, Alarabiya.
¹² Factum Obscura; DiscoveryAlert.
¹³ Factum Obscura; Times of India; RUSI.
¹⁴ Telesur; Modern Diplomacy.
¹⁵ Times of India; Alarabiya.
¹⁶ Modern Diplomacy; DiscoveryAlert.
¹⁷ Guardian commentary and historical inflation lessons.
¹⁸ RUSI; Strait capacity.
¹⁹ Cohen & Steers.
²⁰ CSIS; IEA spare capacity data.
²¹ CSIS.
²² Turn0search22 Wikipedia.
²³ Cingari, IEA data; multiple sources.
²⁴ Strait closure threats in parliament: Wikipedia Strait_of_Hormuz.
²⁵ Export data: Wikipedia Strait_of_Hormuz, Telesur.
²⁶ Kharg as hub: Modern Diplomacy.
²⁷ China trade reliance: FT.
²⁸ CSIS; “prove it” anecdote.
²⁹ DiscoveryAlert, RUSI, Alarabiya.
³⁰ IEA spare capacity: CSIS; multiple OPEC+ statements.
³¹ Cohen & Steers; CSIS; RUSI.
³² CSIS.
³³ CSIS; RUSI.
³⁴ Alarabiya; RUSI on OPEC messaging.
³⁵ Telosur; DiscoveryAlert.
³⁶ Factum Obscura; Cohen & Steers.
³⁷ Wikipedia Strait_of_Hormuz event section.
³⁸ RUSI; Ben Cahill.
³⁹ Telesur; Wikipedia Strait_of_Hormuz; FT.
⁴⁰ Modern Diplomacy.
⁴¹ Telesur; FT; Strait_of_Hormuz.
⁴² FT; Telesur; Modern Diplomacy.
