US and Iran sign an agreement by 2026?

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Market context

The question hinges on whether the United States and Iran will execute a formal written agreement before the end of July 2026. This encompasses any binding accord—whether a sanctions relief deal, nuclear framework extension, prisoner exchange formalisation, or maritime dispute resolution—provided both parties' authorised representatives sign matching or substantively identical documents. The settlement criteria explicitly permit separate signed documents if they reference the same underlying agreement, which broadens the scope beyond a single unified text.

Historical precedent suggests the 83% crowd probability reflects the 2015 Joint Comprehensive Plan of Action (JCPOA), which took roughly two years of intensive negotiations before signature. The Trump administration's 2018 withdrawal and subsequent years of tension created a structural break in diplomatic momentum. However, the Obama-era precedent demonstrates that US-Iran agreements are achievable when political will aligns, and the market window extends eighteen months—sufficient time for either a major breakthrough or a narrower confidence-building accord. The 2023 prisoner exchanges and the ongoing indirect negotiations through intermediaries provide evidence that communication channels remain functional, even if formal talks have stalled.

Traders should monitor announcements from the State Department, Iranian Foreign Ministry, and UN-based diplomatic channels for signals of renewed negotiations. Recent reporting from Reuters and AP News indicates sporadic back-channel discussions, though no formal talks have been publicly scheduled. Key catalysts include shifts in US domestic politics ahead of 2024 elections, Iranian domestic policy changes, and any escalation or de-escalation in regional proxy conflicts. Conditional order strategies could track geopolitical risk indices alongside official statements to capture timing shifts in agreement probability.

Methodology

We track US and Iran sign an agreement by 2026? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket App 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.

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.