▸ Deal: AT A STALEMATE — Trump rejected Iran’s Hormuz proposal today
▸ Session 3 took place September 26; what it produced is the arc’s key unresolved question
▸ Hormuz: commercial transit conditions unclear under stalemate
▸ Bab el-Mandeb: Houthi control of Mayun Island unchanged
▸ Saudi East-West pipeline: shutdown September 12; restoration not confirmed
▸ Oil: rising 2%+ on stalemate news
▸ Oman: urging UN members to avoid force; channel still open
▸ Saudi FM: in Washington meeting Rubio today
▸ 80 countries: joint UN statement condemning Iran and Houthis
▸ Iran: says diplomacy is the only solution
▸ October 6: 8 DAYS AWAY

THE RECALIBRATED PROBABILITY ASSESSMENT
The September 18 deal confirmation elevated ONYX’s probability assessment to ‘Ceasefire extended: VERY LIKELY.’ Today’s confirmed stalemate requires the arc’s most significant single downward recalibration since August 7:
▸ Ceasefire extended with modified terms: POSSIBLE — downgraded from VERY LIKELY; Iran’s ‘diplomacy is the only solution’ and Oman’s open channel preserve this possibility
▸ Ceasefire expires without replacement: ELEVATED TO LIKELY — Trump’s rejection of a specific proposal with 8 days remaining is a severe narrowing of the extension window
▸ Ceasefire collapses before October 6: MODERATE — elevated from LOW by the stalemate and oil rise
▸ Deal restored in 8 days: POSSIBLE but requires specific conditions: a new Iranian proposal Trump will accept, or Saudi FM mediation, or Oman back-channel producing a last-minute framework
THE 8-DAY WINDOW
Eight days to October 6. The window for a resolution:
▸ September 28: Trump rejects Iran’s proposal; oil rises; Saudi FM in Washington; 80-country UN statement
▸ September 29-30: whether Iran makes a counter-proposal; whether Saudi FM mediation produces a framework
▸ October 1-3: last realistic window for a new framework to be agreed and allow formal text
▸ October 4-5: effectively too late for full formalization
▸ October 6: ceasefire expiration
Day 52. Trump rejected Iran’s proposal. Oil is rising. October 6 is 8 days away. The deal that was confirmed on September 18 is at a stalemate. The arc has documented every day of the 52 that produced this moment. The 8 remaining days are the arc’s most critical since Day 1. Oman says the channel is open. Iran says diplomacy is the only path. Trump said no to the proposal on the table. Something has to change in 8 days.
WHAT HAPPENS NEXT
▸ Iran counter-proposal — whether Tehran offers modified terms Trump can accept
▸ Saudi FM mediation — whether Rubio-Faisal talks produce a bridging framework
▸ October 6 — 8 days; the arc’s most critical remaining countdown
| CONFIDENCE: HIGH | Day 52 confirmed stalemate from ONYX 52-day cumulative documentation and September 28 confirmed reporting. |
SOURCES
▸ ONYX August 7 – September 28 — 52-day cumulative Iran deal documentation

