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Updated September 28, 2026 · Category: Geopolitics & World · Market end date: January 1, 2027
As of September 28, 2026 at 12:50 UTC, the leading outcome is December 31 at 12.5%, followed by November 30 at 8.5%, October 31 at 3.4%. The market has $18.71M in total volume and $161.7K in the last 24 hours.
| Outcome | Probability | 24h change | Volume |
|---|---|---|---|
| December 31 | 12.5% | +1.0 pts | $3.19M |
| November 30 | 8.5% | — | $72.8K |
| October 31 | 3.4% | +0.7 pts | $446.2K |
| September 30 | 0.4% | +0.1 pts | $2.03M |
| August 31 (settled) | 0.0% | — | $4.56M |
| June 30 (settled) | 0.0% | -0.2 pts | $3.18M |
| August 18 (settled) | 0.0% | -0.1 pts | $2.73M |
| July 31 (settled) | 0.0% | — | $1.36M |
| August 13 (settled) | 0.0% | — | $1.14M |
Total volume $18.71M · 24h volume $161.7K · Liquidity $430.8K. Prices are Polymarket YES-share prices read as probabilities; they are not executable quotes.
■ December 31 ■ November 30 ■ October 31 · 30-day price history (12-hour points)
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On June 14, 2026, the United States and Iran announced a written diplomatic agreement, including a 60-day extendable period in which both countries committed to negotiate toward a “final deal” regarding Iran’s nuclear program and other topics.
This market resolves to “Yes” if a qualifying written diplomatic instrument between the United States and Iran has been mutually signed or adopted by the specified date, 11:59 PM ET. Otherwise, this market resolves to “No.”
Unless the written instrument is formally adopted without signature as described below, the instrument must be signed by both the United States and Iran. Both parties must either sign the same document or sign individual documents that substantively and directly indicate acceptance of the same underlying instrument, regardless of minor formatting, wording, or translation differences between the signed versions. Both physical signatures and officially-issued electronic signatures will qualify as signatures.
If the written instrument is recognized by the United States and Iran as not requiring signature for execution, formal adoption of the instrument by both countries without signature will qualify. Formal adoption may be established by official actions, including:
(i) an official joint statement announcing that the United States and Iran have adopted, approved, executed, concluded, or otherwise finalized the instrument;
(ii) mutual official confirmation that the same published instrument has been agreed to, adopted, approved, executed, or concluded by both countries;
(iii) adoption, approval, or endorsement through an official resolution, ministerial decision, executive decision, or equivalent institutional act, where that act is the mechanism by which the relevant country adopts the instrument; or
(iv) an exchange of official diplomatic notes or letters confirming acceptance of the same instrument.
A qualifying written diplomatic instrument must:
(i) Be identified as the final deal contemplated by the June 14, 2026, memorandum of understanding, either in official United States or Iranian communications, or by a consensus of credible reporting;
(ii) Establish at least one specific obligation limiting Iran's nuclear program through a concrete, measurable benchmark against which compliance could be tested, which may take the form of a defined limit, prohibition, or quantity (e.g., a specific cap on the purity level to which Iran may enrich uranium, or an explicit commitment for Iran to surrender, destroy, or dilute its enriched uranium stockpile). Non-specific or vague restrictions, with no defined metric (e.g., a pledge not to pursue nuclear weapons, a commitment to maintain the status quo, or an agreement to abide IAEA monitoring or inspections requirements that do not specifically restrict Iran’s nuclear program) will not qualify.
The content of the qualifying instrument must be expressed as an agreed obligation to be implemented. The following do not qualify:
(i) a provision …
Summary of the market's published rules. The rules on Polymarket control settlement; check them there before relying on any outcome: open this market on Polymarket.
More odds by topic: Iran odds · Middle East odds · Geopolitics odds
As of September 28, 2026 at 12:50 UTC, the leading outcome is December 31 at 12.5%, followed by November 30 at 8.5%, October 31 at 3.4%. The market has $18.71M in total volume and $161.7K in the last 24 hours.
The event's listed end date is January 1, 2027. Each outcome settles under the market's written rules, summarized on this page, which can differ from the end-date field.
They are the displayed prices of each outcome's YES share on Polymarket. A price of 60¢ implies roughly a 60% chance. This page refreshes the numbers twice a day, so they are not live quotes.
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