Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
66% | 34% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
66% | 34% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| December 31 | 66% |
| October 31 | 42% |
| September 30 | 24% |
| September 21 | 17% |
| September 14 | 11% |
| September 7 | 5% |
| August 31 | 1% |
| July 24 | 0% |
| July 31 | 0% |
| August 15 | 0% |
| July 14 | 0% |
| August 7 | 0% |
| August 8 | 0% |
| August 9 | 0% |
| August 10 | 0% |
| August 11 | 0% |
| August 12 | 0% |
| August 13 | 0% |
| August 14 | 0% |
| August 22 | 0% |
Market context
The blockade began in July and has already been lifted once before, which gives the market a clear precedent: announcements can move quickly when Washington and Tehran are in active talks, but the default state remains restrictions rather than relaxation. Reuters reported on 13 August that the United States said it could keep the naval blockade indefinitely, while earlier Reuters reporting in June said it had been suspended as part of an interim understanding and then resumed in July after negotiations soured[3][8][13].
For a Yes outcome, traders should watch for a formal White House, Pentagon or CENTCOM statement expressly ending, lifting or suspending the blockade, not just hints about de-escalation. The main catalyst is a breakthrough in the stalled Hormuz shipping talks: Reuters reported on 7 August that U.S. officials linked any lift to a deal restoring commercial shipping, but by 12–13 August Reuters was still describing no progress and competing claims over the strait[10][9][11]. Any scheduled statement, ceasefire-related declaration, or fresh diplomatic announcement from Oman or Iran that changes the shipping arrangement would be the strongest trigger.
Methodology
This page tracks US announces end of Iranian blockade by 2027? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.
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
- 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.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- 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.
- Why do Polymarket and Kalshi differ on elections?
- Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.
- 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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