Bab el-Mandeb Strait effectively closed by 2026?

Platform comparison

Active sub-markets

Market context

The Bab el-Mandeb Strait, a 33-kilometre chokepoint between Yemen and Djibouti, has experienced sustained disruption since late 2023 when Houthi militants began targeting commercial shipping. The market resolves affirmatively only if IMF PortWatch records a 7-day moving average of vessel transits at 10 or fewer—a threshold representing roughly 85–90% reduction from pre-conflict baselines of 60–80 daily arrivals. Current crowd pricing at 0% reflects the strait's operational resilience despite attacks; even during peak disruption phases in early 2024, transit averages remained above 20 vessels daily as shipping adapted routing and insurers adjusted premiums rather than halting passage entirely.

Historical precedent matters for calibration. The 2011 Suez Canal closure lasted 8 days and never achieved transit cessation; the 1967 closure persisted 8 years but involved state-level blockade rather than non-state actors with inconsistent enforcement capacity. Houthi attacks have proven episodic—intensive campaigns followed by lulls—rather than systematic interdiction. Traders monitoring this market programmatically should track IMF PortWatch publication schedules (typically weekly) and cross-reference against shipping indices like the Suez Canal Authority's daily transit counts and Lloyd's List Intelligence vessel tracking data.

Catalysts centre on Houthi operational tempo and international naval presence. Recent statements from Houthi leadership (January 2025) indicate willingness to escalate if Gaza operations continue, but capability constraints—limited drone and missile stocks—suggest sustained rather than total closure remains implausible. A meaningful shift would require either dramatic capability expansion, direct Iranian involvement in enforcement, or coordinated action by multiple regional actors. The settlement window extends to April 2026, allowing 16 months for such scenarios to materialise.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Bot 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?

Polymarket Bot 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.

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.