Does Iran's announced restricted zone near the Strait of Hormuz turn into a halt of commercial traffic, an Oman-brokered shipping arrangement, or does harassment continue at the current tempo, before 31 Oct 2026?
Horizon 2026-10-31 · reviewed by desk:gulf on 2026-09-17
Paths
Restricted zone enforced against commercial traffic
Highly unlikely (5-20%)Iran's announced prohibited zone is enforced against commercial shipping, or a vessel is seized/mined in the strait.
evidence tally — not a probability
Band set 2026-09-17 — No enforcement action against commercial shipping reported as of filing; only a stated intention to plan a zone. band history ↓
Oman-hosted Iran-Gulf shipping arrangement
Unlikely (20-45%)The reported Iran-Gulf meeting in Oman produces an announced routing or de-confliction arrangement.
evidence tally — not a probability
Band set 2026-09-17 — A meeting was reported planned (cluster 946a3fc65980); no outcome yet. band history ↓
Harassment at current tempo(default path)
Likely (55-80%)Coverage of Hormuz-adjacent incidents continues without a step-change in transit volumes or a formal arrangement.
evidence tally — not a probability
Band set 2026-09-17 — Hormuz coverage is flat at a high baseline (~50 outlets/day) with no volume anomaly as of filing; no closure or arrangement reported. band history ↓
Signposts
Restricted zone enforced against commercial traffic
- Litheldprovisionalweight 2
Coverage of attacks/seizures near Hormuz rises
Carried forward from lit — data degraded (gap), held 1 of 3 days.
lit on 66% of evaluable days (n=144)
- Quietheldprovisional
Brent trades at least $6 over WTI (a regional, not global, premium)
Carried forward from quiet — data degraded (gap), held 1 of 3 days.
lit on 57% of evaluable days (n=149)
Oman-hosted Iran-Gulf shipping arrangement
- Watchingprovisionalweight 2
Iran-Gulf meeting in Oman on Hormuz shipping held (editor log)
manual rule reads watch (value=n/a).
lit on 0% of evaluable days (n=151)
- Litheldprovisionalweight 2
Coverage of Hormuz-related Oman talks rises
Carried forward from lit — data degraded (gap), held 1 of 3 days.
lit on 90% of evaluable days (n=144)
Harassment at current tempo
- Quietheldprovisional
Hormuz coverage stays at its usual flat level (no anomaly)
Carried forward from quiet — data degraded (gap), held 1 of 3 days.
lit on 2% of evaluable days (n=123)
What it would move
Brent prices Hormuz risk first, but also carries the Houthi-Saudi risk, so alone it cannot separate the two.
European gas import routes run partly via Gulf LNG; a Hormuz disruption shows up here.
The evidence
No new evidence this week.
On the record
Is the reported Iran-Gulf meeting in Oman on Hormuz shipping confirmed held by 1 Oct 2026?
openA Zaviye story cluster reporting the meeting took place, quoting an Omani, Iranian, or Gulf-state official; resolving editor links the story id.
Opens 2026-09-18 · Closes 2026-10-01 · baseline editor_default (50% hist. freq., n_eff=0.0)
Current band: Roughly even (45-55%)
Revision history (1)
2026-09-17 Roughly even (45-55%) — desk:gulf
Meeting reported as planned 'over the weekend' language as of 15 Sep; no confirmed date.
Does the Brent-WTI spread reach $6 or more on any day between 17 Sep and 16 Oct 2026?
voidResolves YES automatically the first day pair.brent_wti.spread >= 6.0 using quality='ok' daily closes.
Opens 2026-09-18 · Closes 2026-10-16 · baseline signal_replay (0% hist. freq., n_eff=0.0)
Current band: Unlikely (20-45%)
Revision history (1)
2026-09-17 Unlikely (20-45%) — desk:gulf
Spread measured at 3.58-3.43 on 16-17 Sep, well under the 2-year p95 of ~6.9; would need a fresh regional shock.
Voided: Voided during integration (2026-09-17): its baseline was frozen with hist_freq=0.0 before pair.brent_wti.spread had any real backfilled history (both baseline_baseline table and the forecast's frozen resolution_rule fields are immutable by design, so the wrong number could not be corrected in place). Reissued as brent-spread-6-by-oct16-v2 with a correctly measured baseline. No reader ever saw this forecast — it predates the engine's launch.
Does the Brent-WTI spread reach $6 or more on any day between 17 Sep and 16 Oct 2026?
openResolves YES automatically the first day pair.brent_wti.spread >= 6.0 using quality='ok' daily closes.
Opens 2026-09-18 · Closes 2026-10-16 · baseline signal_replay (27% hist. freq., n_eff=102.0)
Current band: Unlikely (20-45%)
Revision history (1)
2026-09-17 Unlikely (20-45%) — desk:gulf
Spread measured at 3.58-3.43 on 16-17 Sep, well under the 2-year p95 of ~6.9; would need a fresh regional shock.
What changed
- 2026-09-17 Restricted zone enforced against commercial traffic band set to Highly unlikely (5-20%) by sync
- 2026-09-17 Harassment at current tempo band set to Likely (55-80%) by sync
- 2026-09-17 Oman-hosted Iran-Gulf shipping arrangement band set to Unlikely (20-45%) by sync