US-Iran Final Nuclear Deal by…?

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Market context

The underlying real-world event is a preliminary memorandum of understanding signed by US and Iranian officials on 17 June 2026, establishing a 60-day negotiation window to resolve Iran’s nuclear programme, sanctions relief, and maritime security in the Strait of Hormuz. This framework, described as a political roadmap rather than a final treaty, defers contentious issues like uranium stockpile removal and ballistic missile restrictions to future talks, making a definitive final deal by August 2026 highly uncertain despite the crowd-implied 0% probability.

Historically, comparable cases such as the 2015 Joint Comprehensive Plan of Action (JCPOA) show that broad frameworks often fail to translate into binding final agreements when core disputes remain unresolved; the new MoU explicitly lacks enforcement mechanisms for Iran’s nuclear commitments, mirroring past diplomatic fragility where negotiations stalled over enrichment levels and stockpile disposal. The current 0% probability reflects this precedent, as Iran has previously rejected US proposals and delayed concessions, suggesting a final signed instrument by the settlement date is unlikely.

Traders should monitor scheduled announcements from the High Level Committee overseeing implementation, particularly any progress on removing highly enriched uranium stockpiles or lifting US sanctions, as these are critical dependencies for a final deal. Recent reporting by Axios confirms talks include maritime security de-escalation but no agreement on nuclear material removal, indicating significant hurdles remain [3]. For market accessibility, German GlüStV regulations and US CFTC reach apply to this prediction market, while the ‘no-KYC up to $1,500’ threshold allows retail participants to trade without identity verification, enhancing accessibility for those under the limit.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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.

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.