Bab el-Mandeb Strait effectively closed by 2026?

Platform comparison

Market context

In the last 24–48 hours, maritime-security reporting said the Houthis had prepared missiles and drones near Bab el-Mandeb, but the Joint Maritime Information Center said commercial traffic continued through the southern Red Sea and that vessels were still using established lanes without disruption. Kpler separately observed a 34% day-on-day drop in traffic on Tuesday, but that is still a far cry from the kind of sustained collapse needed for a 7-day average of 10 or fewer ship calls. [9]

That is why the market’s 0% implied probability is anchored in history: even during severe attack waves, Bab el-Mandeb has tended to see reduced but ongoing transits rather than a true shutdown. Lloyd’s List Intelligence reported that traffic fell 9% week-on-week in early March, yet still counted 241 cargo-carrying ships over 10,000 dwt in the week, while another update said daily transits showed no immediate effect from attacks and only a broader downward trend over several weeks. [1][5] Recent months have also shown partial recovery, with January 2026 transits up 11% year-on-year despite continued security risk. [4]

For a Yes, traders need either an extreme escalation that sharply deters nearly all traffic or a data discontinuity that leaves the IMF PortWatch series unable to show more than 10 average arrivals for a full seven-day window. The main catalysts are official shipping advisories, insurer and carrier routing decisions, and any new Houthi or Iranian threats that change operator behaviour; Reuters previously reported Maersk and Hapag-Lloyd suspending or rerouting sailings when the regional security picture worsened. [7] Because the settlement depends on IMF PortWatch’s published 7-day moving average of “Arrivals of Ships”, the key watch item is not headlines alone but whether those disruptions translate into a sustained collapse in observed transit calls.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Bab el-Mandeb Strait effectively closed by 2026? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.