US-Iran ceasefire continues through 2026?

Platform comparison

Market context

The market assesses whether direct US military strikes against Iranian territory will occur between now and September 2026. The 97% implied probability reflects a sustained period of relative restraint following the April 2024 Iranian ballistic missile attack on Israel and the subsequent US air defence response, neither of which triggered immediate escalation into direct US-Iran strikes. The definition excludes proxy actions, naval interceptions, and cyber operations, focusing narrowly on kinetic strikes that physically impact Iranian soil.

Historical precedent suggests the 97% confidence may underweight tail risks. The US conducted direct strikes on Iranian military targets in January 2020 (killing Qasem Soleimani) and again in April 2024 (air defence systems), both following Iranian provocations or regional escalations. The 2015 nuclear agreement framework and subsequent withdrawal in 2018 created periods of heightened tension without direct conflict. Comparable prediction markets on Kalshi and Betfair have historically shown wider probability ranges (85–95%) on Iran-related military action, whilst Polymarket's deeper liquidity on this specific market may reflect more refined probability estimation, though decimal odds conversions across platforms can obscure subtle divergences in how traders price tail-risk scenarios.

Traders monitoring this through September 2026 should track Iranian nuclear programme developments, particularly IAEA inspection reports and uranium enrichment announcements, alongside Israeli military operations in the region and any US policy shifts following the 2024 election cycle. Recent statements from Iranian officials regarding nuclear escalation and US military posture in the Gulf remain key indicators. Fee structures vary significantly: Polymarket charges 2% on resolution, whilst Kalshi's flat-fee model may favour larger positions on lower-probability outcomes.

Methodology

We read US-Iran ceasefire continues through 2026? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.