Oil, Iran and the Strait of Hormuz
Roughly a fifth of the world's oil passes through one narrow waterway, and it has been disrupted since the conflict began. Here's what actually moves the price now, and why a crisis premium does far less to an oil company's value than it does to its profits.
The short answer
Oil is trading well above where it started the conflict but far below its peak, and it now moves on shipping data rather than on headlines. The Strait of Hormuz — through which roughly a fifth of global oil passes — has been disrupted since hostilities began, and every step toward or away from reopening it moves the price several per cent in a day. For investors, the more useful question isn't where oil goes next, but what a temporary price spike does and doesn't do to what an oil company is worth.
Why Hormuz matters more than any other chokepoint
It is the narrow waterway connecting the Persian Gulf to the open ocean, and roughly 20% of the world's daily oil throughput passes through it. There are no adequate alternative routes at that volume — pipelines exist but carry a fraction of what shipping does. That's why a disruption there does something a production cut elsewhere doesn't: it removes supply that physically cannot be rerouted.
The practical effect shows up in three places at once: the crude price, war-risk insurance premiums for tankers, and shipping rates. All three feed into the delivered cost of fuel, which is why petrol prices can rise faster than the crude headline alone suggests.
What actually moves the price now
Ship traffic data, not statements
Analysts have noted the market shifted from trading the war to trading the shipping numbers — how many vessels actually transited, which cargoes moved, whether traffic is recovering. Announcements move prices for hours; transit counts move them for weeks.
The terms of any reopening
A deal that reopens the strait with conditions — restricted vessel nationalities, transit fees, monitored routes — is very different from a full reopening. Partial arrangements keep a risk premium in the price permanently.
Whether buyers have already adapted
Refiners make procurement decisions weeks ahead, and much of the market has already reduced immediate reliance on Gulf supply. Adaptation of that kind tends to persist after a crisis ends, which caps how far prices fall on good news.
Spare capacity elsewhere
OPEC+ output decisions and non-Gulf production determine how much of the shortfall can be covered. This is the slow-moving variable that decides whether a spike is temporary or structural.
What a high oil price does to oil shares — and what it doesn't
Producers' profits move almost directly with crude, so a spike produces enormous reported earnings. Two of the US majors made very large profits during this period, prominently enough to draw political comment. That's real money.
What it isn't is a permanent increase in what those businesses are worth. A company's value is the cash it generates across a full cycle, discounted — and a conflict premium is by definition temporary. Valuing an oil major on crisis-period earnings is the same error as valuing a chipmaker on peak-cycle earnings, and it produces the same result: the shares look cheapest exactly when they're most expensive.
The four checks that matter for an oil company in this environment
Break-even oil price
The crude price at which the company covers costs, capital spending and its dividend. A business funding all three at $50 is a completely different proposition from one needing $75, however similar they look at $90.
Where the windfall goes
The industry's historic failure is reinvesting crisis profits into high-cost projects at the top of the cycle, then writing them off at the bottom. Debt reduction and buybacks made at sensible prices signal a different management culture.
Dividend cover from free cash flow
Compare the distribution to free cash flow after capital spending, at a normal oil price rather than the current one.
Political risk on profits
Very large profits during a conflict attract windfall taxes and political attention. That's a real risk to shareholder returns and it rises with the oil price, not with the quality of the business.
The wider effects worth tracking
Energy prices feed inflation, inflation feeds interest rate expectations, and rates drive the discount rate applied to every share on the market — see what happens when rates rise. That transmission is why a Middle East shipping dispute shows up in the valuation of a UK software company. It also runs the other way: oil falling on peace talks has been one of the clearer supports for equity markets during this period.
Value energy on a normal oil price
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Explore Oak GrowthCommon questions
How does the Iran conflict affect oil prices?
Through the Strait of Hormuz, the waterway carrying roughly a fifth of global oil, which has been disrupted since hostilities began. Because there is no adequate alternative route at that volume, disruption removes supply that cannot be rerouted, and each step toward or away from reopening moves prices several per cent in a day.
Why is oil not higher given the conflict?
Brent peaked above $113 in March 2026 and has since traded in a lower range because refiners adapted their procurement away from immediate Gulf reliance, non-Gulf production and OPEC+ capacity covered part of the shortfall, and negotiations over transit arrangements progressed. Markets now respond more to actual shipping data than to headlines.
Are oil stocks a good investment when oil prices are high?
High crude prices lift reported profits, which makes producers look cheap on current earnings just as the commodity sits furthest above its long-run level. Since price spikes are usually caused by temporary supply disruption, buying on those earnings carries the same risk as buying any cyclical at the top of its cycle.
What is the Strait of Hormuz and why does it matter?
It is the narrow waterway connecting the Persian Gulf to the open ocean, through which roughly 20% of the world's daily oil throughput passes. Pipeline alternatives carry only a fraction of that volume, so disruption there removes supply that physically cannot be rerouted — which is why it moves global prices more than production changes elsewhere.
Also see: How to value oil stocks → · BP analysis → · Shell analysis →