Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Election Predictions UK) Pick polygram.ink (preferred broker) |
6% | 94% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
6% | 94% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| September 30 | 6% |
| August 31 | 2% |
Market context
The real-world event is a transfer of **effective control** over one of four Iranian-held Gulf islands, not a dispute over ownership on paper. Iran’s position is entrenched: Farsi is reported as an IRGC Navy base and has long been treated as Iranian sovereign territory under the 1968 agreement with Saudi Arabia[1][14]. That makes the current **2% YES** pricing consistent with a market that needs a full change in primary governmental or military control, not a raid, strike, or temporary interruption. The historical comparison is the 2016 Farsi incident, when U.S. sailors were briefly detained after entering Iranian waters; it underscored how quickly tensions can flare without changing control on the ground[1][15].
For traders, the key catalyst is any credible shift in **state control**, especially through war, occupation, or a negotiated transfer that is actually implemented. PBS recently noted renewed attention on the islands as U.S. strikes on two nearby islands in recent days revived speculation about their role in the Strait of Hormuz, but speculation alone does not satisfy the market’s wording[16]. Kharg matters most for oil because it is a major export hub, while Hormuz and Hengam are tied to the strategic choke point at the mouth of the Gulf; however, strategic vulnerability is not the same as loss of control. The market is therefore leaning on an unlikely, high-impact geopolitical catalyst rather than routine diplomatic movement, and any trader should watch for verified military occupation, an internationally backed authority, or a formal transfer that is visibly in force before the September 2026 deadline[16][12].
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Farsi, Hengam, Hormuz or Kharg Island no longer under Iranian control by 2026? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.
Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.
UK Frequently Asked Questions
- How accurate are political prediction markets?
- Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.
- What resolution source is used for elections?
- Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.
- Can prediction markets influence election outcomes?
- Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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