69% — US-Iran nuclear deal before 2027
Polymarket 69% · 1 contracts · $27K volume · medium confidence
Updated 2026-06-08 06:12:01 UTC

Why this matters:
This market reflects a roughly even-odds assessment of whether the US and Iran will reach a new nuclear agreement by the end of 2026. The 51% probability sits between the more pessimistic near-term contracts (9% for a deal before June, 26% by June 30) and longer-dated expectations, suggesting markets see limited momentum for imminent negotiations but acknowledge possibilities over the remaining months. The current level balances structural barriers—deep US-Iran tensions, domestic political constraints in both countries, and the contentious terms from previous negotiations—against potential diplomatic openings. Key uncertainties include whether either administration signals renewed willingness to negotiate, how regional conflicts evolve, and whether international mediators can broker terms acceptable to both sides. The gap between near-term and year-end probabilities implies markets expect any deal would require sustained diplomatic work beyond the immediate period.

Key factors:
- US domestic political calendar and leadership positions relative to when negotiations could realistically conclude
- Iran's willingness to return to negotiating table given previous agreement withdrawals and sanctions dynamics
- Status of regional conflicts (Gaza, Yemen, proxy tensions) and whether de-escalation occurs ahead of nuclear talks
- International mediator involvement and stated commitment from key actors like the EU or neighboring countries to facilitate talks
- Technical parameters and inspection protocols that both sides would need to accept, drawing from JCPOA precedent

Contracts:
- US-Iran nuclear deal before 2027? — 69¢ Polymarket $27K (weight 100%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-06-08T05:20:10.793Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "69% per prediction markets (SimpleFunctions, June 2026)"
Canonical: https://simplefunctions.dev/answer/usiran-nuclear-deal
Full data: https://simplefunctions.dev/api/public/query?q=US-Iran%20nuclear%20deal%20before%202027
Provider: SimpleFunctions — https://simplefunctions.dev