HighI Geo-Economics & Chokepoints25 September 2026, Friday
Iran offers to open Hormuz by the end of day 7 if the US blockade and oil sanctions are lifted; Rubio says no breakthrough, Brent closes 2.1% lower at $104.32
Foreign Minister Araghchi said at the UN General Assembly on 25 September that Hormuz would open by the end of day 7 if the US lifts its naval blockade and oil sanctions and abides by a ceasefire including Lebanon. The plan accelerates the 60-day roadmap of 24 September; Brent futures closed $2.28 lower at $104.32 the same day.
According to a 25 September Al Jazeera report, the sequence proposed by Araghchi is as follows: first, fighting stops on all fronts including Lebanon, the US lifts its naval blockade and oil sanctions, and frozen Iranian assets are released; at the end of 7 days Hormuz opens, and only then do talks on the nuclear programme begin. According to the same report, the proposal builds on the 17 June memorandum of understanding but shortens the timetable and changes the order of negotiation; US Secretary of State Rubio said it would be wrong to describe the talks as a major breakthrough, and Washington wants the nuclear file addressed immediately within a single package. According to Euronews, the proposal was conveyed through mediators; the amount of frozen assets was not disclosed.
According to Gulf News, Araghchi met Witkoff and Kushner for around 3 hours under Qatari mediation; the US blockade had turned back 115 commercial vessels as of 23 September, and sources close to the Revolutionary Guards questioned whether the talks had been approved by decision-making bodies in Tehran. According to a 25 September Reuters report published on Yahoo Finance, Brent closed $2.28 (2.1%) lower at $104.32 and WTI $2.20 (2.3%) lower at $92.41; Brent ended the week up less than 1%, WTI down around 8%. Investing.com's historical table, however, shows the 25 September close at $104.45 (−2.02%); there is a $0.13 difference between the two data sets.
Talay assessment
Bottom line
By compressing the 60-day framework into a 7-day first step, Iran places the lifting of the blockade ahead of the nuclear file; the US wants a single package. Although the opening of Hormuz in the near term looks unlikely until the sequencing dispute is resolved, the market took $2.28 of risk premium out of Brent on 25 September. The dispute over authority in Tehran also leaves the binding nature of the proposal unclear.
Likely effects
- Oil priceUncertainWeeks
After touching a high of $108.23 on 24 September, Brent fell to $104.32 on 25 September; daily swings of 2–4% continue between diplomatic headlines and attacks on Saudi infrastructure.
- Maritime tradeUncertainWeeks
The blockade has turned back 115 vessels; even if the proposal is accepted, Hormuz could open at the earliest by the end of day 7, that is, in early October.
- Türkiye's energy billPositiveWeeks
Brent staying above $100 keeps Türkiye's energy import bill and fuel prices high; if the 2.1% fall on 25 September holds, it could feed through as a cut at the pump.
Possibilities, ranked
- 1Talks continue, no breakthrough55%
The parties remain stuck on sequencing, indirect contact continues, and the blockade and Hormuz restrictions remain unchanged until early October.
Watch: Whether the US gives a written response within the 4–5 day window
- 2Partial first step30%
The US partially eases the blockade, Iran opens passage to certain vessel classes, and the nuclear file is tied to a separate timetable.
Watch: A drop in vessels turned back by the blockade and daily Hormuz transits exceeding 20
- 3Talks collapse15%
The dispute over authority in Tehran or new attacks cut off contact, and Brent returns above $108.
Watch: An official Revolutionary Guards statement rejecting the talks
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 futures (25 Sep)▼ $104.32 / −2.1%
- WTI (25 Sep)▼ $92.41 / −2.3%
- Vessels turned back by blockade▲ 115 (23 Sep)
Historical context
Brent crude oil (futures), last 6 months
- 122/09 · Saudi Arabia restarted the East-West pipeline, shut by a drone attack on 13 September, at low flow on 22 September; full capacity will take weeks
- 224/09 · France sends troops, radar and air defence systems to Saudi Arabia's Yanbu oil terminal against Houthi attacks; troop numbers not disclosed
- 324/09 · Houthis fire 6 ballistic missiles at Yanbu and Taif; with the Red Sea end of the East-West pipeline targeted, Brent closes up 3.41% at $106.60
- 425/09 · Brent–WTI spread widens from $7.97 to $11.91 in a week: WTI ends the week lower at $92.41, Brent flat at $104.32
- 525/09 · Iran offers to open Hormuz by the end of day 7 if the US blockade and oil sanctions are lifted; Rubio says no breakthrough, Brent closes 2.1% lower at $104.32
- 625/09 · Diesel rises by 2.55 lira on 25 September after a 5.5-lira cut on 24 September; a litre climbs to 93.45 lira on Istanbul's European side
- 728/09 · Brent retreats from its intraday high as Yanbu news trims the premium
- 828/09 · Brent tops 106 dollars in Asia as Iran sees no new round
Sources
- Al Jazeera — What's in Iran's seven-day plan to reopen the Strait of Hormuz
- Euronews — Iran proposes plan to US to reopen Hormuz in seven days and end the war
- Gulf News — Iran's Pezeshkian vows never to bend at the knee at UN as US–Iran talks take centre stage
- Yahoo Finance (Reuters) — US–Iran ceasefire hopes push oil lower
- Investing.com — Brent oil futures historical data