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Iran Conflict 2026
21SEP

Brent at $112 as Houthis join the war

2 min read
15:34UTC

The IEA's largest-ever emergency oil release has not stabilised prices; a Dow executive warned supply chains will take nine months to recover after the strait reopens.

ConflictDeveloping
Key takeaway

Nine months of supply chain damage is locked in regardless of when the war ends.

Brent Crude closed at $112.57 on 28 March, up 4.22% on the day. Pre-war Brent was $67.41; the current price represents a 67% increase in 29 days. The Houthi entry and Iran's firm rejection of negotiations drove the reversal. 1

The IEA's record 400 million barrel emergency release, the largest in the agency's 50-year history, has not stabilised prices. The IEA itself said why: "The most important factor is resumption of regular transit through the strait of Hormuz." 2 European reserves are predominantly industry-held: 74.8 million barrels from industry versus 32.7 million from government, giving European governments less direct control than the headline figure implies.

Dow CEO Jim Fitterling stated the damage is already locked in: even if Hormuz reopens tomorrow, petrochemical supply chains will take 250-275 days to unwind. The US-Asia petrochemical pricing gap has surged from under $500 to over $1,200 per metric tonne. 3 US farmers face a 2 million tonne urea shortfall during spring planting, with urea prices up 49% to $720 per tonne. Corn and wheat yields on affected fields could fall 10-20%, with downstream effects on global grain prices by autumn.

Deep Analysis

In plain English

Oil prices closed at $112.57 per barrel on 28 March, up about 4% on the day. Before the war started, a barrel cost $67.41. The 67% rise in 29 days is one of the fastest sustained oil price increases in modern history. The IEA, a group of oil-consuming countries, released the largest emergency oil reserve in its history: 400 million barrels. It has not reduced prices. The IEA itself said why: reserves cover a temporary supply disruption; they cannot substitute for a closed shipping route. For a British driver, $112 oil means roughly £1.80 per litre at the pump. For farmers, fertiliser is the bigger problem. Urea, the chemical used to grow corn and wheat, has risen 49% in price and the US faces a 2 million tonne shortage this spring planting season. Crop yields could fall 10-20%, and those effects will reach food prices by autumn.

What could happen next?
  • Consequence

    A ceasefire today does not end the economic damage: Dow's 250-275 day supply chain unwind means petrochemical-driven inflation persists into Q1 2027 regardless of conflict resolution.

  • Risk

    The 2 million tonne urea shortfall is not substitutable within a planting season; US crop yields in autumn 2026 are already compromised regardless of war outcome.

First Reported In

Update #50 · Houthis join; Iran holds two chokepoints

Fortune· 28 Mar 2026
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Different Perspectives
Shipping and insurance industry
Shipping and insurance industry
UKMTO counted about 20 US-facilitated Hormuz transits a day to 11 September against only 6 visible on AIS, with traffic still around 90% below the 138-a-day pre-war baseline. War-risk underwriters cannot price hulls they cannot see, or resolve whether the tanker El Gaia hit a mine, as Iran claims, or a missile and drone, as CENTCOM says.
European refiners
European refiners
European refiners, including Poland's Orlen, absorbed a roughly $26 gap between Dated Brent at $130.80 on 15 September and ICE Brent futures settling at $103.87 on 18 September, a spread that widened from $13.45 on 9 September rather than newly opening. Their futures hedges no longer cover what they now pay for physical barrels.
Saudi Arabia
Saudi Arabia
Saudi Aramco zeroed European term customers' October allocations and rerouted roughly 60 million barrels to Asia through Ras Tanura and Sohar, using Red Sea and Gulf terminal capacity built years ago to cut Hormuz exposure. Riyadh reallocated existing supply rather than negotiating a shortfall with Europe.
Qatar
Qatar
Qatar's energy minister Saad al-Kaabi told Bloomberg at the Qatar Economic Forum on 20 September that Bessent's two-year Hormuz-obsolescence forecast is wrong, and that Doha has deliberately built no bypass pipeline. Qatar's gas exports run through one waterway by choice, not oversight.
Iran (foreign ministry and Majlis)
Iran (foreign ministry and Majlis)
Iran's foreign ministry and 130 Majlis deputies moved toward NPT withdrawal this week, with lawmaker Hossein-Ali Haji Deligani filing a triple-urgency bill on 20 September that Speaker Qalibaf has not yet scheduled. Tehran treats treaty membership as leverage still on the table, not yet spent.
Russia and China
Russia and China
Moscow and Beijing vetoed the Panel of Experts' renewal, maintaining Resolution 2231 lapsed in October 2025 and the 2025 snapback was never validly triggered, so the sanctions architecture the Panel enforces has no current legal standing. Both governments frame the veto as upholding law, not shielding Tehran.