US-Iran nuclear deal by June 30?

Platform comparison

Market context

The Polymarket contract on a US-Iran nuclear agreement by end-June 2026 trades at 37% YES, pricing in roughly three-to-two odds against a deal materialising within the next 18 months. Settlement hinges on a publicly announced mutual agreement between Washington and Tehran covering Iranian nuclear research or weapons development—bilateral or multilateral formats both qualify. The conditional tokens on Polygon reflect persistent scepticism about near-term diplomatic movement, despite recurring rhetoric from both capitals about willingness to negotiate.

Historical precedent offers mixed signals for interpreting this probability. The Joint Comprehensive Plan of Action (JCPOA) took roughly two years of intensive talks (2013–2015) before announcement, though those negotiations occurred under different political conditions in both countries. The Trump administration's 2018 withdrawal and subsequent maximum-pressure campaign reset the baseline entirely; the Biden administration's early 2021 signals of potential re-engagement have yielded no formal agreement in over five years. Previous cycles suggest that once serious negotiations commence, announcement timelines can compress, but initiating talks themselves remains the binding constraint.

Traders monitoring this contract should track statements from Iran's new government following its September 2024 presidential election, US State Department diplomatic appointments post-January 2025, and any multilateral intermediation attempts (particularly from the EU or Gulf states). Reuters reported in late 2024 that indirect talks via intermediaries had resumed, though no substantive progress was publicly confirmed. Scheduled UN General Assembly sessions, IAEA board meetings, and any shifts in regional security dynamics—particularly Israeli-Iranian tensions—will likely move the conditional token price materially.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.