US x Iran Effective Ceasefire by 2026? (2 week pause)

Platform comparison

Market context

The United States and Iran have agreed to a provisional two-week truce, suspending expanded strikes on Iranian civilian infrastructure while Tehran pauses combat operations. This fragile pause, mediated by Pakistan, hinges on the immediate reopening of the Strait of Hormuz and sets the stage for urgent negotiations on nuclear programmes and sanctions relief [1][4].

Historical precedents suggest such short-term pauses are common but often unstable. The Twelve-Day War ceasefire between Israel and Iran held initially despite early violations before bombing resumed months later, illustrating the difficulty of sustaining temporary de-escalation in this region [10]. Similarly, the April 2026 ceasefire sparked market relief but analysts warned that trust issues hinder lasting peace, with oil prices remaining elevated above pre-war levels [5]. These cases frame the current 5% crowd-implied probability as a realistic assessment of the risk that qualifying military action resumes before a continuous 14-day window closes.

Traders should monitor announcements regarding the Strait of Hormuz’s status and the final approval of the 60-day memorandum of understanding by President Trump, which remains pending [12]. Any resumption of US strikes on Iranian infrastructure or Iranian attacks on US facilities would reset the 14-day clock, as seen when fresh US strikes occurred after a tanker was hit in the Hormuz in June 2026 [2]. The settlement window extends to August 2026, meaning the outcome depends entirely on whether this diplomatic pause survives without interruption through the end of the period.

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). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.