Who will sign U.S. x Iran deal?

Platform comparison

Active sub-markets

Market context

Negotiations between the United States and Iran over nuclear policy, sanctions relief, and regional security remain unresolved as of early 2025. A formal bilateral agreement signed by a U.S. official before 31 July 2026 would represent a significant diplomatic reversal from the Trump administration's 2018 withdrawal from the Joint Comprehensive Plan of Action (JCPOA). The 19% implied probability reflects the structural difficulty of such an accord: deep mutual distrust, domestic political opposition in both capitals, and competing regional interests involving Israel, Saudi Arabia, and proxy forces across the Middle East.

Historical precedent suggests the baseline for U.S.–Iran deals is low but not negligible. The 2015 JCPOA took years of back-channel negotiation and involved six parties; the 1981 Algiers Accords on hostage release took months of Swiss mediation. Neither required congressional ratification as a formal treaty, which shaped their feasibility. Current market pricing across platforms—Polymarket at 19%, Kalshi's decimal equivalent, and Betfair's lay odds—converges on scepticism, though liquidity varies considerably by venue. Smarkets' tighter spreads suggest professional traders view the probability as sticky rather than volatile.

Catalysts to monitor include any U.S. envoy appointment, Iranian domestic political shifts following elections, and statements from regional actors. Reuters reported in January 2025 that backchannel discussions had resumed in Oman, though no formal talks were scheduled. The settlement window closes 1 August 2026, giving roughly 18 months for either breakthrough or stalemate. Traders should track sanctions enforcement announcements and any Israeli military action in Iran, both of which could collapse negotiating space entirely.

Methodology

This page compares Who will sign U.S. x Iran deal? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi Alternative 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.

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.

What does it cost to trade on Kalshi Alternative UK?

Zero. Kalshi Alternative UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.