PolymarketGeopoliticsUpdated 9m ago

Next US-Iran senior diplomatic meeting by December 31, 2026?

As of Sep 29, 2026, 2:53 AM ET, Polymarket priced this market at 63.0% (down from 64.5% 24 hours earlier). It had $30.3K traded in the past 24 hours, $43K of order-book liquidity and a bid-ask spread of 2.0 pts. probcast.co rates the support behind this price as moderate.

Market probability
63.0%
−1.5 percentage points
over 24 hours64.5% → 63.0%
93 days until the event deadline
Deadline: December 31, 2026 at 6:59 PM ET

A repricing with partial backing — read the new probability with some caution.

The pricing has partial support: healthy trading volume and market depth, a tight spread.

How credible was the move?

Three separate questions — a move can be genuine while the latest price is still settling. Methodology →

Move validity

Is the move backed by real trading and depth?

Moderate

The pricing has partial support: healthy trading volume and market depth, a tight spread.

Consensus stability

Has the market settled at the new probability?

Forming

Movement has slowed (1.5 points over six hours) but the market has not fully settled.

Contract clarity

Will the rules resolve without ambiguity?

High

The resolution rules are relatively specific, with a named source and a defined deadline.

Recent trade activity$20K traded

From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.

What this market actually measures

On September 22, U.S. Special Envoy Steve Witkoff and Jared Kushner met Iranian Foreign Minister Abbas Araghchi on the sidelines of the UN General Assembly in New York, with President Trump saying another meeting is scheduled in the near future.(see: https://www.israelhayom.com/2026/09/22/witkoff-kushner-attended-us-iran-meeting-another-expected-soon).

This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.

View full official resolution rules

On September 22, U.S. Special Envoy Steve Witkoff and Jared Kushner met Iranian Foreign Minister Abbas Araghchi on the sidelines of the UN General Assembly in New York, with President Trump saying another meeting is scheduled in the near future.(see: https://www.israelhayom.com/2026/09/22/witkoff-kushner-attended-us-iran-meeting-another-expected-soon). This market will resolve to “Yes” if there is a direct or indirect senior-level diplomatic meeting between the United States and Iran by the listed date, 11:59 PM ET. Otherwise, this market will resolve to “No”. A diplomatic meeting occurs when representatives of both listed countries who are acting in an official capacity and are authorized to engage in diplomacy on behalf of their respective governments or governing authorities deliberately meet for the purpose of diplomacy or negotiation. A qualifying meeting need not result in any agreement, joint statement, or further engagement. A diplomatic meeting is senior-level if each listed entity is represented by a head of state, a head of government, or a vice president; a foreign minister; a minister of cabinet rank; the secretary or head of a national security council; the presiding officer of a national legislature; a special envoy; or another individual designated by the head of state or head of government to conduct diplomatic negotiations on their behalf. Individuals authorized only for technical, implementation, monitoring, staff-level, preparatory, or working-group-level talks will not be considered designated to conduct diplomatic negotiations on behalf of the head of state or head of government. This definition includes, but is not limited to, all of the following individuals: for the United States, Donald Trump, JD Vance, Marco Rubio, Scott Bessent, Steve Witkoff and Jared Kushner; and for Iran, Mojtaba Khamenei, Masoud Pezeshkian, Abbas Araghchi and Mohammad Bagher Ghalibaf. In each case, a qualifying representative must participate in the meeting. A direct meeting refers to a diplomatic meeting where the representatives of both countries directly interact with each other in person. Meetings conducted through translators qualify, provided direct, face-to-face communication occurs. An indirect meeting refers to a meeting conducted indirectly through designated mediators or facilitators. A qualifying indirect meeting must meet both of the following criteria (i) the designated intermediaries act with the knowledge and authorization of both entities; (ii) representatives of both entities are physically present in the same facility, venue, or city as part of a single organized round of talks convened for the purpose of diplomatic engagement, with the intermediary conveying communications between the representatives or delegations on the same day. “The same day” means the same calendar day local time at the meeting location. Sessions, proceedings, or convenings of standing international organizations, treaty bodies, or recurring multilateral summits or conferences (e.g., the United Nations General Assembly, G7, and G20 summits) do not qualify, unless a qualifying and deliberate diplomatic meeting between representatives of the listed countries is separately held alongside such a convening. The following do not qualify as either a direct or indirect diplomatic meeting: chance encounters; standalone exchanges limited to greetings, courtesies, or photo opportunities; meetings conducted remotely, by telephone, or by any other means where the relevant representatives are not physically present at the same facility, venue, or city on the same day; discussions involving persons not authorized to engage in diplomacy or negotiation on behalf of their respective governments. The resolution sources for this market will be official information from the governments of the United States and Iran and a consensus of credible reporting.

What could move this market next?

  • The market's deadline arrivesDecember 31, 2026 at 6:59 PM ET

    The contract must resolve based on what has happened by this date.

Derived from the contract's own mechanics as of Sep 29, 3:02 AM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Probability by deadline

The same event, priced across deadline contracts on this venue.

Extending the deadline from Sep 30 to Dec 31 adds about 57.9 percentage points of implied probability.

Advanced analysis (experimental)

Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: low · expected error ±17 pts.

Thin marketLegacy movement classifier: watch

What's happening

medium classifier confidence
Thin market

Thin book and/or wide spread. Small orders can move this price disproportionately, so any single print is noisy and easily overread.

  • Thin book and/or wide spread.

Read with caution —Read the latest price with caution; conditions make it an unreliable summary right now.

More details — reliability score, dynamics, durability
Reliability score
36Low
Where the price path tends to go next407 observed
  • Choppy / mean-reverting91%
  • Stable consensus3%
  • Thin-liquidity spike2%

Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

DurabilityHigh· half-life ~6h
PredictabilityStable

Secondary read: leaning toward Trading normally.

A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.

Market data

24h volume

$30.3K

Liquidity

$43K

Total volume

$59.9K

Category
Geopolitics
Venue
Polymarket
Open interest
—
Spread
2.0 pts
Best bid
62.0%
Best ask
64.0%
7-day range
63.0% – 64.5%
Resolves
Dec 31, 2026
Change (pts)1H-0.56H-1.524H-1.57D-1.5

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