US-Iran ceasefire continues through 2026?

Platform comparison

Market context

The market prices a 96% chance that direct US military strikes against Iran will not occur between now and end-September 2026. This reflects the current informal ceasefire holding after months of tit-for-tat escalation, though the definition here is narrow: only air strikes, cruise missiles, or surface-to-surface drones count as qualifying actions. Cyber operations, naval interdiction, or strikes on Iranian proxies elsewhere do not trigger a "No" resolution.

Historical precedent suggests such probabilities are vulnerable to sudden reversals. The 2019-2020 cycle saw US-Iran tensions swing from relative calm to the Soleimani assassination to Iranian missile strikes on Al Asad airbase within weeks. More recently, the April 2024 Iranian drone and missile barrage prompted immediate US-Israeli response, yet de-escalation followed. The 22-month window to September 2026 is substantial, but regional flashpoints—Israeli operations in Gaza and Lebanon, nuclear negotiations, or proxy actions in Iraq or the Gulf—have historically compressed decision timelines to days.

Traders should monitor three variables: any major Israeli escalation against Iranian targets or Hezbollah that draws Iranian retaliation; announcements regarding the Joint Comprehensive Plan of Action or new sanctions regimes; and statements from incoming US administrations on Iran policy. The Trump transition in January 2025 carries particular weight given his 2018 withdrawal from the JCPOA. Reuters reported in December 2024 that Iran had accelerated uranium enrichment, a potential flashpoint for renewed confrontation. At 96%, the market prices near-certainty; even modest geopolitical friction could shift odds materially.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.

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.

UK Frequently Asked Questions

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.