Bab el-Mandeb Strait effectively closed by 2026?

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Active sub-markets

Market context

The Bab el-Mandeb Strait, a 30-kilometre chokepoint between Yemen and Djibouti, handles roughly 12% of global maritime trade. Since late 2023, Houthi militants have launched repeated attacks on commercial vessels transiting the waterway, prompting many shipping lines to reroute via the Cape of Good Hope—a journey adding weeks and significant fuel costs. This market asks whether the strait will experience a severe traffic collapse, defined as fewer than 10 ships per day on a 7-day rolling average, by April 2026. When you purchase a YES share, you're betting that threshold will be breached; a NO share represents confidence it won't.

Historical precedent matters here. The 2021 Suez Canal blockage by the Ever Given container ship saw transit calls plummet to near-zero for six days, yet the strait itself has never recorded sustained sub-10 daily transits in recent decades despite piracy, naval activity, and regional conflict. Current IMF PortWatch data shows daily arrivals typically ranging between 20 and 40 vessels, even under active Houthi pressure. The 0% crowd probability reflects this baseline resilience: markets assign extremely low odds to a scenario requiring either a dramatic escalation in attack success, a major policy shift forcing closure, or a sustained economic shock that collapses global shipping demand.

Traders monitoring this market should track Houthi attack frequency and accuracy rates, US and allied naval presence in the Red Sea, and shipping-line rerouting decisions. Recent statements from major carriers and the Suez Canal Authority regarding insurance premiums and transit fees will signal whether commercial incentives shift toward acceptance of the risk. Any formal international closure declaration or significant spike in successful vessel strikes would represent the primary catalyst for YES movement.

Methodology

We track Bab el-Mandeb Strait effectively closed by 2026? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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 Prediction Market 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.

Is this market available outside the US?

Prediction Market UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market 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.