Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Best Prediction Markets UK Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Best Prediction Markets UK → |
Polymarket polymarket.com |
0% | 100% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Best Prediction Markets UK → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Best Prediction Markets UK → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Best Prediction Markets UK → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Best Prediction Markets UK → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on Best Prediction Markets UK.
Active sub-markets
| March 31 | 0% YES | 100% NO |
| April 30 | 0% YES | 100% NO |
| May 31 | 0% YES | 100% NO |
| June 30 | 14% YES | 86% NO |
| September 30 | 21% YES | 80% NO |
Market context
The Bab el-Mandeb Strait, a 33-kilometre chokepoint between Yemen and Djibouti, has experienced sustained disruption since Houthi forces began targeting commercial shipping in late 2023. The market asks whether transit volumes will fall to 10 or fewer vessels per day (measured as a 7-day moving average) by April 2026. Current crowd pricing at 0% implies near-certainty that shipping will remain above this threshold, despite ongoing attacks and insurance premiums that have tripled regional transit costs.
Historical precedent suggests the threshold is difficult to breach. During the 2011 Suez Canal blockade, daily transits fell below 20 vessels but rarely approached single digits even at peak disruption. The 2022 Russia-Ukraine war saw Black Sea shipping severely constrained yet maintained roughly 15–25 daily transits through alternative routes. IMF PortWatch data from 2024 showed Bab el-Mandeb averaging 35–45 arrivals daily despite Houthi incidents, indicating substantial operational resilience and rerouting capacity via the Cape of Good Hope, albeit at significant cost.
Traders should monitor three variables: escalation in Houthi targeting accuracy (recent strikes have improved but remain sporadic); insurance and fuel surcharges that might render the route economically unviable; and any formal shipping industry guidance suspending transits. The US Navy's Operation Prosperity Guardian has maintained a visible presence but has not prevented attacks. A meaningful shift toward closure would likely require either a major geopolitical escalation in the Yemen conflict or a coordinated shipping industry decision to abandon the route entirely—neither currently priced into the 0% crowd assessment.
Methodology
This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets UK, which mirrors the Polymarket order book directly.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
FAQ
- Where can I trade this market with the lowest fees?
- On Best Prediction Markets UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, Best Prediction Markets UK triggers a quick verification flow that finishes in minutes.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
Trade Bab el-Mandeb Strait effectively closed by 2026? on Best Prediction Markets UK
Live order book, 0% fees, USDC settlement in seconds.
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