Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
8% | 92% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
8% | 92% | 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 → |
Market context
The Strait of Hormuz, through which roughly one-fifth of global oil passes, has experienced significant disruption since early 2024 following Houthi attacks on commercial shipping and subsequent regional tensions. The question is whether daily transit volumes—measured as a seven-day moving average of arriving vessels across all cargo types—will recover to 60 or more calls per day by mid-September 2026. Pre-disruption baseline transit levels typically ranged between 60 and 80 vessels daily, making the 60-call threshold a conservative marker of normalisation rather than peak capacity.
Historical precedent suggests sustained maritime chokepoint disruptions rarely resolve within two years absent major geopolitical shifts. The 2011–2015 Iran sanctions regime saw Hormuz traffic decline sharply but took years to stabilise; the 2022 Russia–Ukraine conflict created lasting shipping route diversions that persisted well beyond initial conflict phases. Current crowd probability of 8 per cent reflects scepticism that regional tensions will ease sufficiently within the timeframe, particularly given ongoing Houthi capabilities and the absence of negotiated settlement frameworks as of late 2024.
Traders should monitor three catalysts: formal ceasefire agreements involving Houthi actors or their backers, documented changes in insurance premiums and rerouting costs that might incentivise return to direct Hormuz passages, and quarterly IMF Portwatch data releases showing sustained upward trajectory. Reuters and Lloyd's List have tracked daily transit counts; any sharp reversal in rerouting behaviour or announced security corridor agreements would signal material probability shifts. The market's low probability reflects the structural difficulty of reversing eighteen months of alternative routing and risk-mitigation behaviour within a single year.
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 Strait of Hormuz traffic returns to normal by September 15? 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.
- 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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