MediumI Geo-Economics & Chokepoints22 September 2026, Tuesday

Brent falls from 104.82 dollars on 17 September to 100.05 dollars on 22 September as Hormuz transit data conflict

Expectations of US-Iran diplomacy pushed oil down by about 5 dollars in five days. On actual traffic through Hormuz sources conflict: 17 vessel transits were reported over the weekend, against a pre-war average of 125 ships a day.

According to Wikipedia's chronology of the world oil market, Brent closed at 104.82 dollars and WTI at 101.91 dollars on 17 September. Fortune's compilation put Brent at 101.61 dollars a barrel at 09.35 US Eastern Time on 21 September, down 2.72 dollars, or 2.61%, on the previous business day. Nairametrics the same day showed Brent at 101.71 dollars (−2.04%) and WTI at 98.20 dollars, with both benchmarks at their lowest since 10 September. TradingEconomics data put Brent at 100.05 dollars on 22 September, with a daily change of −0.28% and a session low of 98.63 dollars. According to Fortune the price is about 51.82% higher than a year earlier.

The trigger for the decline is the expectation of diplomacy. Iran's president travelling to New York for the UN General Assembly, and signals that the US side is open to talks, pulled prices down; TradingEconomics also reported that Iran had offered to reopen Hormuz within one week if the United States lifted the blockade, and that Saudi Arabia was preparing to restart the east-west pipeline halted by a drone strike. Gulf News, by contrast, reported that only 17 commercial vessels passed through Hormuz over the weekend, against 37 the previous weekend, and that the pre-war average stood at 125 ships a day. Because the degree of normalisation in the strait is a point on which sources conflict, no single transit figure could be independently verified.

Talay assessment

Bottom line

With a decline of about 5 dollars in five days the market is pricing the possibility of diplomacy, yet the physical flow data do not fully support that optimism: 17 transits over the weekend is far below the pre-war average of 125 a day. The price holding around 100 dollars shows the risk premium has not disappeared. The most likely path is a volatile range of 95-105 dollars for as many weeks as the signals about talks persist.

Likely effects

Energy-importing countriesUncertainWeeks
Brent falling from 104.82 dollars to 100.05 dollars gives limited relief on the import bill; but with the price still about 51.82% higher than a year earlier, the burden remains entrenched.
Freight and marine insuranceNegativeWeeks
Seventeen weekend transits against a pre-war average of 125 a day show tanker supply is still constrained; freight and war-risk premiums are not easing despite the fall in the oil price.
Türkiye's current account and inflationUncertain1–6 months
A 5 dollar decline in oil eases Türkiye's energy import bill and reduces pressure for fuel price increases; but a level around 100 dollars remains high for the current account deficit and the inflation path.
Saudi supply capacityPositiveWeeks
Preparations to restart the east-west pipeline halted by a drone strike would restore export capacity that does not depend on Hormuz and reduce upward pressure on the price.

Possibilities, ranked

1
Volatile sideways trade on diplomacy signals50%
Expectations of talks stay alive and the price fluctuates in a 95-105 dollar band; Hormuz transits rise slowly and unevenly.
Watch: Weekly Hormuz transit counts rising above 37 vessels and Brent holding around 100 dollars
2
An agreement and the reopening of the strait25%
The United States eases the blockade and Iran reopens Hormuz within one week; transits approach the pre-war level of 125 a day and the price falls markedly.
Watch: A declared understanding between Iran and the United States and a weekly jump in transit counts
3
Diplomacy collapses and escalation resumes25%
Talks end without result or another tanker is attacked; transits fall back towards 17 vessels and Brent moves back above 105 dollars.
Watch: Reports of a new tanker attack or an announcement that talks after the UN General Assembly have been cancelled

Probabilities are calibrated judgement based on the sources, not measurement, and are revised as new information arrives. Not investment advice.

Market reaction

Indicators affected

Brent▼ −4.77 dollars
WTI▼ −3.71 dollars
Hormuz transits▼ 17 ships, weekend

Historical context