US and Iran sign an agreement by 2026?

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Active sub-markets

Market context

The Polymarket crowd is pricing a US–Iran written agreement by end-July 2026 at 83% probability, implying roughly 5-to-1 odds the two nations will formalise some accord within eighteen months. This reflects genuine diplomatic momentum: the Biden administration has maintained backchannel talks through Oman and Switzerland, whilst Iran's newly elected government under Masoud Pezeshkian has signalled openness to nuclear negotiations. The settlement criteria are deliberately broad—any signed document substantively indicating mutual acceptance qualifies, whether a formal treaty, executive agreement, or paired bilateral instruments.

Historical precedent suggests the bar is lower than it appears. The 2015 Joint Comprehensive Plan of Action (JCPOA) took roughly two years of intensive negotiation before signature. The 1981 Algiers Accords, which resolved the hostage crisis, moved from framework to signature in months. Conversely, the Trump administration's 2018 withdrawal from the JCPOA and subsequent "maximum pressure" campaign froze formal diplomacy for four years. The current 83% probability likely reflects traders' assessment that structural conditions—Iranian economic pressure, US domestic political appetite for a deal, and third-party mediation infrastructure—now favour agreement more than they did in 2017–2020.

Traders should monitor three concrete catalysts: announcements of high-level talks or UN General Assembly meetings (typically September), any Iranian nuclear programme escalations that might reset negotiating positions, and US domestic political developments post-November 2024 elections. Reuters and Bloomberg have reported ongoing indirect talks through intermediaries; formal delegation meetings or leaked negotiating texts would sharpen market pricing materially. The settlement window's eighteen-month horizon is neither rushed nor indefinite, pricing in realistic diplomatic timescales.

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 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.

Is this market available outside the US?

Kalshi UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 does it cost to trade on Kalshi UK?

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

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.