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Home/Geopolitics/Will the next diplomatic US-Iran meeting be in Iran by September 30, 2026?
PolymarketGeopoliticsUpdated 7m ago

Will the next diplomatic US-Iran meeting be in Iran by September 30, 2026?

Market probability
0.1%
Little changed over 24 hours
45 days until the event deadline
Deadline: September 30, 2026 at 7:59 PM ET

No meaningful repricing — the probability is steady.

The pricing is supported by healthy trading volume and market depth.

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?

Strong

The pricing is supported by healthy trading volume and market depth.

Consensus stability

Has the market settled at the new probability?

Stable

The probability has held near its current level over the past several hours.

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$133.3 traded

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

What this market actually measures

On June 22, the first round of U.S.-Iran diplomatic talks in Switzerland concluded, with mediators reporting progress toward a roadmap for a final deal and follow-on technical talks expected to continue (see: https://www.aljazeera.com/news/2026/6/22/us-iran-agree-on-roadmap-towards-final-deal-in-switzerland-talks). This market will resolve according to the country in which the next formal senior-level round of peace …

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 June 22, the first round of U.S.-Iran diplomatic talks in Switzerland concluded, with mediators reporting progress toward a roadmap for a final deal and follow-on technical talks expected to continue (see: https://www.aljazeera.com/news/2026/6/22/us-iran-agree-on-roadmap-towards-final-deal-in-switzerland-talks). This market will resolve according to the country in which the next formal senior-level round of peace talks between representatives of the United States and Iran begins by September 30, 2026, 11:59 PM ET. A qualifying round must be a deliberate in-person diplomatic meeting or negotiating round concerning US-Iran relations, involving senior representatives of both the United States and Iran who are acting in an official capacity and are authorized to conduct or materially direct diplomacy on behalf of their governments. Indirect in-person diplomacy through designated mediators, facilitators, or interlocutors will qualify, provided senior representatives of both the United States and Iran are participating in the same formal diplomatic process with the knowledge and authorization of their respective governments. The representatives need not be in the same room at the same time. Follow-on technical talks from the June 22 Switzerland round will not qualify by themselves. Technical, staff-level, working-group, implementation, monitoring, preparatory, or deconfliction meetings will not qualify unless they occur as part of a new formally convened senior-level U.S.-Iran peace-talks round. Brief greetings, chance encounters, photo opportunities, ceremonial appearances, or talks not deliberately aimed at diplomacy or negotiation will not count. The meeting must be in-person (including indirect in-person meetings) and must be publicly acknowledged by either government or reported by a consensus of credible media. Remote meetings, phone calls, or other meetings where the relevant parties are not present will not count. If a qualifying round occurs in more than one country, resolution will be based on the country where the first qualifying senior-level diplomatic session begins. If the next qualifying round begins in any country in the Middle East or North Africa other than the listed options, this market will resolve to “Other - Middle East/North Africa.” If the next qualifying round begins in any country in Europe other than the listed options, this market will resolve to “Other - Europe.” For purposes of this market, countries’ regions will be determined based on the U.S. State Department’s regional classifications in the “Countries and Areas List” (https://www.state.gov/countries-and-areas-list). Any country classified as part of “Europe and Eurasia” will be considered to be in Europe. Any country classified as part of “Near East (Middle East and North Africa)” will be considered to be in the Middle East/North Africa. If the next qualifying round begins in any unlisted country that is not classified in either specified region, this market will resolve to “Other.” If no qualifying round begins by September 30, 2026, 11:59 PM ET, this market will resolve to “No Meeting by September 30.” 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 arrivesSeptember 30, 2026 at 7:59 PM ET

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

Derived from the contract's own mechanics as of Aug 16, 4:38 PM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

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: high · expected error ±9 pts.

Trading normallyLegacy movement classifier: watch

What's happening

medium classifier confidence
Trading normally

Liquid, two-sided, and calm. The current price reads as settled consensus — the latest print is a reasonable summary of what the market believes.

Change (pts)1H0.06H0.024H0.07D0.0
Score breakdown — Movement, Liquidity & Trust

ProbCast Trust Score

78/ 100 · Medium

Reasonably supported. Generally reliable, with minor caveats. Main caveat: limited history.

ProbCast measures how reliable this market probability appears — not what to trade.

Movement0

Magnitude of recent probability change

Liquidity80

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ProbCast — Odds Reliability

Know whether prediction-market odds can be trusted. ProbCast analyzes liquidity, market activity, spreads, and price movement to help distinguish meaningful repricing from thin-market noise.

Questions? Chat with us on Telegram
TodayTop MoversEventsAll MarketsWhat ChangedVenue DivergencePolymarket vs KalshiMethodologyCoverageMeta's ArenaWatchlistTerms of UsePrivacyCrypto
  • Liquid, two-sided, and calm — price behaving as settled consensus

The latest price is a usable but caveated read — weigh it with the market state.

More details — reliability score, dynamics, durability
Reliability score
55Medium
Where the price path tends to go next213 observed
  • Stable consensus91%
  • Choppy / mean-reverting7%
  • Trend continuation1%

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

DurabilityHigh· half-life ~4w
PredictabilityStable

Secondary read: leaning toward Quote-driven.

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

$112.6K

Liquidity

$34.3K

Total volume

$168K

Category
Geopolitics
Venue
Polymarket
Open interest
—
Spread
0.0 pts
Best bid
0.1%
Best ask
0.1%
7-day range
0.1% – 0.1%
Resolves
Sep 30, 2026

Depth of the order book and volume

Trust breakdown

78/100 · Medium

Reasonably supported. Generally reliable, with minor caveats. Main caveat: limited history.

  • Liquidity anchor+57
  • Price steadiness+30
  • Limited history-8
Trust score78 / 100
How these scores work →
View on Polymarket

ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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