Why Brent Crude Has Climbed Above $90 This Week
Brent crude has become sharply more expensive. Since the start of the week, the benchmark grade has gained more than five dollars per barrel, with the October contract trading just above $90 in early Monday dealing. The immediate driver is the unresolved war between the United States and Iran and the continued disruption of shipping through the Strait of Hormuz, the narrow waterway through which a large share of global oil supplies normally moves.
The route is still far from normal. The United Kingdom Maritime Trade Operations agency has reported that attacks by Iran's Revolutionary Guards in the strait are continuing, and it has warned of the risk posed by drifting or uncharted mines. Merchant traffic is operating at a reduced level. The shipping picture is the physical reason behind the oil price increase, even as Washington insists that it has gained control of the waterway.
Analysts also point to a second pressure: stock drawdown. Commodity analysts at Commonwealth Bank of Australia say the latest price rise shows that markets are skeptical about a settlement in the Iran war. At the same time, industrial countries are releasing oil from their reserves. The analysts warn that the drawdown of global inventories could push Brent toward $100 per barrel.
President Donald Trump has claimed that the United States now has complete control over the Strait of Hormuz and told reporters that the strait belongs to the United States. He also threatened that Iran would be swept away if it acted. Iran has not directly responded. Tehran has said that any full reopening of the sea route depends on the United States and its allies ending the war and releasing frozen Iranian funds, and it has announced plans to charge transit fees.
Inside the Hormuz War Premium and the Path Toward $100 Oil
The verified facts are straightforward: the physical route remains dangerous enough to keep merchant traffic below normal, and the oil market is repricing that loss of reliable supply. The analysis below separates the war premium from the inventory signal.
Why U.S. control claims and usable passage are not the same thing
President Trump's assertion that the United States has complete control over the Strait of Hormuz is a statement about military power, not about safe commercial transit. The UK Maritime Trade Operations advisory continues to report attacks by Iran's Revolutionary Guards and the risk of drifting or uncharted mines, while merchant shipping is operating at a reduced level. For tanker owners, charterers and insurers, the test is not who claims control of the waterway but whether a voyage can be insured and completed without attack.
The inventory channel pushing Brent toward $100
The second force is stock drawdown. Commonwealth Bank of Australia's commodity analysts warn that the drawdown of global inventories threatens to push Brent toward $100 per barrel. This matters because industrial countries are already releasing oil reserves to compensate for the partial closure of the strait. If the disruption continues, strategic stocks are being consumed rather than rebuilt, leaving the market with a thinner cushion against any further supply shock.
Tehran's conditions keep a reopening uncertain
Iran has not directly responded to Trump's latest claim that the strait belongs to the United States. Instead, Tehran has stated that a full reopening depends on the United States and its allies ending the war and releasing frozen Iranian funds, and it has announced an intention to charge transit fees. Mohsen Rezaee, described by state broadcaster Press TV as the newly appointed chairman of Iran's Supreme National Security Council, has repeated those conditions. For the oil market, that is a negotiating position, not a near-term reopening signal.
What Oil Buyers and Shippers Should Do at Reduced Hormuz Traffic
For energy buyers, shippers and businesses with fuel exposure, the practical implications are tied to the specific conditions reported in the Strait of Hormuz.
- Price base case: Use the current October Brent level above $90 as the base case, not a temporary spike. Commonwealth Bank of Australia's warning that global inventory drawdowns could carry Brent toward $100 is linked to reduced Hormuz transits, so fuel and feedstock budgets should not assume a prompt reopening of the strait.
- Shipping clearance: Treat UKMTO advisories, not Washington's control claims, as the operational test for voyages. UKMTO still reports Revolutionary Guard attacks and a mine risk while traffic is reduced, so voyage planning and insurance cover should reflect partial-closure risk until those advisories change.
- Term supply confirmation: Industrial countries are already drawing strategic reserves. Buyers with term supply should ask suppliers to confirm Gulf loading windows and fallback crude grades that do not depend on the Strait of Hormuz, since merchant traffic is still operating at a reduced level.
- Concrete de-escalation trigger: The signal to reprice a possible drop in the war premium is Iran's stated condition: an announced end to the U.S.-led war or the release of frozen Iranian funds. A confirmed step on either front would be a stronger basis for changing supply assumptions than the latest presidential statements.
Risk & Opportunity Assessment
| Commercial Risk | High | Brent has risen more than $5 per barrel this week to above $90, and Commonwealth Bank of Australia analysts link continued inventory drawdown to a possible move toward $100; buyers and refiners face higher input costs and tighter physical supply while Hormuz traffic is reduced. |
| Competitive Risk | Medium | Companies and countries able to draw strategic reserves or access crude via routes outside the Strait of Hormuz will have a cost and reliability advantage over buyers dependent on reduced Hormuz transits. |
| Regulatory Risk | Medium | Tehran has said it will charge transit fees and is conditioning the reopening of the strait on an end to the U.S.-led war and release of frozen Iranian funds, creating rerouting, compliance and cost uncertainty. |
| Reputation Risk | Medium | The U.S. administration's full-control statements sit alongside UKMTO reports of continuing Revolutionary Guard attacks and mine risk; a perceived gap between official declarations and shipping advisories can weaken confidence in clearance claims. |
| Technology Disruption | Low | No technological shift is driving this event; the risk is physical disruption at a maritime chokepoint rather than technology-driven market change. |
| Commercial Opportunity | Medium | Higher prices and the need to replace strategic reserve drawdowns create openings for alternative suppliers and non-Hormuz crude sources, though the source does not quantify those positions. |
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