The Strait of Hormuz is 33 kilometres wide at its narrowest point. Through that channel passes roughly 21 million barrels of oil per day, about 20% of all globally traded petroleum and 30% of the world's liquefied natural gas. It connects the producing nations of the Persian Gulf to every major consuming economy on earth. Iran controls the northern shore. Any serious military escalation in the region immediately raises closure risk, and markets know it.
The strait has never actually closed. But the threat alone has moved crude markets by $10–20 per barrel in a matter of hours during past episodes of US-Iran tension. In 2019, after attacks on Saudi oil facilities at Abqaiq and Khurais, Brent jumped 15% in a single trading session. The market was not pricing in an actual closure, it was pricing in the possibility of one. That risk premium is the baseline reality for anyone investing in energy, emerging markets, or anything touched by global industrial supply chains.
The question worth asking is not just whether the strait could close, it is what happens if it does, and for how long. Duration is everything. A two-week disruption and a six-month disruption are not quantitatively different versions of the same scenario. They are qualitatively different crises with entirely different macroeconomic and geopolitical consequences.
Width at narrowest point: 33 km (two-lane shipping corridor ~3 km wide)
Daily oil flow: ~21 million barrels (20% of globally traded oil)
Daily LNG flow: ~30% of global LNG trade
Key exporters transiting: Saudi Arabia, UAE, Kuwait, Iraq, Iran
Primary destinations: Asia 60%, Europe 20%, North America ~5%
Who depends on it, and who doesn't
The first thing to understand about Hormuz is that the risk is asymmetrically distributed. The countries most exposed are not the ones with the most geopolitical leverage to prevent a closure.
Asia receives approximately 60% of all Hormuz oil flows. China is the world's largest single importer from the Persian Gulf. Japan and South Korea, with virtually no domestic oil production, are structurally dependent on Gulf crude. India imports 85% of its total oil consumption, with roughly 40–45% sourced from Persian Gulf producers. These three economies, together representing over a quarter of global GDP, have no short-term alternative if Hormuz closes.
Europe receives around 20% of Hormuz flows. North Sea production and Norwegian exports provide some insulation, but European LNG markets are tightly connected to Gulf supply. The US, now a net oil exporter, has minimal direct exposure to Hormuz supply disruption, but as a major participant in global oil markets, a price spike still hits American consumers regardless.
The irony worth noting: Iran itself is a major oil exporter through the Strait. Closing it hurts Iran's own export revenue. This is the structural constraint that has historically made actual closure an unlikely outcome even during peak tension. But "unlikely" and "impossible" are not the same thing, and asymmetric payoffs, where the downside of being wrong is catastrophic, justify serious scenario analysis even for low-probability events.
Four scenarios, and why duration is everything
Most coverage of Hormuz risk focuses on whether the strait will close. The more useful question is: if it does, for how long? A two-week disruption and a six-month disruption are not quantitatively different versions of the same crisis. They are qualitatively different scenarios with entirely different economic and geopolitical consequences. Strategic reserves, alternative routes, and market psychology respond differently to each.
Scenario 1: Two-week disruption
A two-week closure is the "controlled crisis" scenario, a military incident or a temporary blockade that escalates and then de-escalates before the full weight of supply disruption lands on the physical economy.
The immediate market response would be swift and severe even before a single barrel is actually withheld from the market. Brent crude would spike $20–35 per barrel on day one as fear premium floods in. War risk insurance exclusions activate immediately, shipping insurers suspend cover for vessels transiting the Gulf, which effectively halts commercial traffic before any physical barrier exists. Tanker owners will not move without insurance.
The International Energy Agency's coordinated strategic reserve release mechanism would be triggered within days. The US Strategic Petroleum Reserve, maintained at around 350–400 million barrels, could release 1–2 million barrels per day. But SPR releases are a bridging mechanism, not a substitute. They buy time; they do not replace supply.
For most major economies, a two-week disruption is painful but survivable. Supply chain buffers, the crude sitting in storage tanks, the LNG in floating storage, the refined product inventories at distribution centres, cover 30–60 days of normal consumption. A two-week hit does not empty those buffers.
India is the exception. With strategic reserves covering only approximately 9 days of consumption, versus the US at 30+ days and China's estimated 60+ days, India has minimal cushion. A two-week disruption hits Indian refinery throughput within days, not weeks. The rupee comes under immediate pressure as markets price in a widening current account deficit. Whether petrol and diesel prices surge depends on whether the government passes through the oil price increase or absorbs it via fuel subsidies, which has its own fiscal consequences.
Scenario 2: One-month disruption
A sustained month-long closure changes the nature of the problem. This is no longer a liquidity crisis that strategic reserves can paper over, it is a genuine supply shock requiring structural responses.
Brent crude in this scenario trades in the $40–60/bbl above pre-crisis levels, potentially reaching $110–130/bbl depending on the baseline. That puts it in 2008 price territory in nominal terms. The strategic reserve drawdown becomes material, the IEA's collective member reserves hold roughly 1.4 billion barrels, but the coordinated release rate has practical limits around 5–6 million barrels per day.
The alternative pipeline routes become critical discussion points, but they cannot cover the gap. Saudi Arabia's East-West pipeline runs from the Eastern Province to Yanbu on the Red Sea coast, with a capacity of approximately 5 million barrels per day. The UAE's Habshan-Fujairah pipeline, running from the Abu Dhabi interior to the Gulf of Oman (bypassing the Strait), has capacity of around 1.5 million barrels per day. Together, that is roughly 6.5 million barrels per day of bypass capacity, against normal Hormuz flow of 21 million barrels per day. The shortfall is enormous.
Saudi East-West Pipeline (Yanbu): ~5 mb/d capacity
UAE Habshan-Fujairah Pipeline: ~1.5 mb/d capacity
Total bypass capacity: ~6.5 mb/d
Normal Hormuz daily flow: ~21 mb/d
Coverage gap: ~14.5 mb/d (69% of normal flow with no alternative)
The macroeconomic consequences begin to crystallise around the four-week mark. India faces a GDP growth headwind of 0.5–1.0 percentage points on fiscal year estimates. The Reserve Bank of India finds itself in an impossible position: inflation rising sharply due to energy prices, but an economy slowing due to supply disruption. Hiking rates into a slowdown caused by an external supply shock is bad monetary policy, but letting the rupee absorb the full adjustment risks imported inflation becoming embedded. Neither option is clean.
China's GDP impact is estimated at 0.3–0.6% depending on the pace at which strategic reserves are drawn down and alternative suppliers, Russia, West Africa, North America via longer voyages, can be mobilised. China has more cushion than India but fewer geopolitical levers to influence a resolution.
Europe faces an energy inflation resurgence. The continent's gas markets, still sensitive after the 2022 Russia-Ukraine energy crisis, would experience LNG price spikes as Gulf LNG is diverted or delayed. Central banks that had declared victory on inflation would face renewed pressure, complicating rate paths. Germany, already in recession as of early 2025, would face a simultaneous energy cost shock and industrial demand headwind.
Scenario 3: Three-month disruption
A three-month sustained closure is a serious economic crisis for the global economy. Brent sustains above $100/bbl. At some point, demand destruction begins, high enough prices force industrial users and consumers to reduce consumption, which eventually cools the price. But the pain required to get to that demand destruction point is severe.
India enters a genuine economic emergency. Fuel subsidies balloon as the government attempts to shield consumers, blowing out the fiscal deficit. If subsidies are not extended, petrol and diesel price increases of 30–50% are realistic, feeding directly into consumer price inflation across every sector of the economy. The rupee under sustained current account pressure could depreciate 10–15% against the dollar in this scenario. RBI's credibility is tested. Portfolio outflows from emerging markets compound the currency pressure.
China activates emergency domestic production measures, accelerates coal utilisation where possible (with obvious emissions implications), and leans on its Russian supply relationship. The near-term pain is still severe, Chinese industrial activity contracts, property market stress deepens as the broader economy weakens. Beijing's narrative of controlled growth becomes harder to sustain.
The United States faces a paradox. American shale producers benefit enormously from $100+ crude, US production economics improve at scale, capex ramps up, and the Permian basin runs at maximum output. But American consumers pay $5–6 per gallon at the pump. The political crisis is real. A Fed that had been considering rate cuts faces an oil-driven inflation resurgence that constrains monetary easing. The dollar strengthens, which makes dollar-denominated debt more expensive for the emerging markets already under pressure.
Global shipping begins the major reconfiguration of routes. Cape of Good Hope rerouting for tankers that would normally transit Hormuz adds 2–3 weeks to delivery times for Asian destinations receiving non-Gulf crude. Freight costs spike across all commodities as vessel capacity is absorbed by longer voyages. The inflationary impulse is not limited to oil, it runs through everything that moves on ships.
Scenario 4: Six months or longer
A six-month or indefinite Hormuz closure is a structural reorganisation of global energy trade. This is not a scenario most analysts price as base case, and for good reason. The economic cost to all parties, including the Gulf producers who depend on export revenue and Iran which exports through the Strait itself, is so severe that it creates enormous pressure toward resolution well before six months.
But "enormous pressure toward resolution" is not the same as "guaranteed resolution." If the closure stems from a broad regional war, an Israeli-Iranian military conflict that pulls in US naval assets, or a collapse of Gulf state stability, the political dynamics that would normally force a deal may not exist.
Even Saudi Arabia faces an existential revenue threat in a six-month closure. The kingdom cannot export meaningfully beyond its pipeline capacity. The assumption that producers will always prioritise keeping the Strait open is not a law, it is a historical pattern that holds only as long as no party miscalculates badly enough to break it.
In this scenario, the world begins building infrastructure it should have built decades ago. New pipeline routes from the Gulf to non-Hormuz terminals become geopolitical priorities. LNG infrastructure is fast-tracked. Alternative energy investment accelerates dramatically, not because of climate policy, but because of energy security. Geopolitical alliances reorganise around the simple question of who can supply energy reliably and who cannot.
This scenario is the one that reshapes the world economy for a decade rather than a quarter. It is also the one that makes every analysis written before it looks trivially inadequate. Nobody has a real model for it, because nobody has ever lived through it.
Why it matters even when it doesn't close
The practical insight from this analysis is not that Hormuz will close, it probably won't. The practical insight is that the risk premium embedded in Persian Gulf crude pricing is real and persistent, and it affects investment decisions, hedging strategies, and macroeconomic planning regardless of whether the strait actually closes.
The Iran-US tensions of 2019–2020 demonstrated this clearly. During the period of maximum tension following the US killing of Qasem Soleimani in January 2020, Brent moved sharply on Hormuz closure risk. No barrels were actually withheld from the market. The risk premium was entirely expectational, markets pricing in a possibility, not a reality. That premium dissipated when the immediate crisis passed, but the structural underlying risk did not.
Every company with supply chains running through the Gulf, every central bank with inflation targets, and every portfolio manager with energy or emerging market exposure is implicitly taking a view on Hormuz risk. Most of them are not doing so explicitly or consciously. That gap between implicit exposure and explicit analysis is where mistakes happen.
The India problem
India is the country I think about most when I run this analysis, partly because it is where I am currently working, but primarily because the vulnerability is so stark and so underappreciated in mainstream coverage.
85% oil import dependency. Approximately 40% of imports from Persian Gulf producers transiting Hormuz. Strategic reserves covering roughly 9 days of consumption, roughly a third of US coverage and a seventh of China's estimated reserves. A currency that is structurally sensitive to current account dynamics. An inflation-prone economy where fuel prices feed rapidly into food and transport costs.
India's two structural responses to Hormuz risk are the right ones: expand strategic petroleum reserve capacity (the government has plans to expand from the current ~5 million tonnes to a more meaningful buffer), and diversify supply toward US LNG and other non-Gulf sources. Both are in progress. Neither is complete. In the event of a serious Hormuz disruption, the gap between where India is and where it needs to be becomes painfully visible.
The macroeconomic fate of 1.4 billion people is partially determined by what happens in a 33-kilometre channel of water on the other side of the Arabian Sea. That is not an abstraction. It is the actual condition of the global economy in 2026, and it deserves more serious analysis than it typically receives.