Bab el-Mandeb Strait effectively closed by 2026?

Platform comparison

Active sub-markets

Market context

The Bab el-Mandeb Strait, a critical chokepoint between the Red Sea and the Gulf of Aden, has experienced sustained disruption since Houthi attacks on commercial shipping intensified in late 2023. This market asks whether transit volumes will collapse to 10 or fewer arrivals per week—a threshold representing near-total closure. Current crowd pricing at 0% implies traders assess the probability of such an extreme outcome as negligible, despite documented attacks and rerouting behaviour.

Historical precedent matters here. The 2022 Russia-Ukraine blockade of Ukrainian grain exports created comparable shipping bottlenecks, yet even under military interdiction, major straits rarely hit single-digit weekly transits unless physically mined or formally blockaded by state navies. Houthi capabilities, whilst operationally disruptive, differ materially from state-level closure mechanisms. Comparable prediction markets on Kalshi and Smarkets show similar low probabilities, though Betfair's decimal odds format (around 1.01) reflects tighter liquidity than Polymarket's equivalent. The IMF PortWatch dataset itself carries publication lags; traders should note that resolution depends on official data release timing, not real-time incident counts.

Catalysts to monitor include escalations in attack frequency or accuracy, formal shipping insurance withdrawals, or announcements from major carriers (Maersk, MSC) suspending transits entirely. Recent reporting from Lloyd's List and Reuters indicates weekly arrivals have stabilised around 30–50 calls despite attacks, suggesting market participants view further deterioration as unlikely absent a qualitative shift in Houthi targeting or international naval intervention. The settlement window extends to April 2026, providing eighteen months for conditions to shift materially.

Methodology

This page compares Bab el-Mandeb Strait effectively closed by 2026? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Polymarket Alternative routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Alternative, 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?

Polymarket Alternative 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.

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.

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.