Yemen's Houthi rebels have effectively shut the Bab el-Mandeb Strait to commercial shipping, forcing vessels to take the long way around southern Africa. As of September 30, a prediction market pegged the chance of a full closure at 27.5% 'YES'. The attacks mark a sharp escalation in the group's campaign against ships linked to Israel and its allies.
Why the Strait Matters
The Bab el-Mandeb is a narrow chokepoint between Yemen and Djibouti, connecting the Red Sea to the Gulf of Aden. Roughly 10% of global seaborne oil passes through it. When the strait is unsafe, ships must sail around the Cape of Good Hope, adding thousands of miles and weeks to voyages. That drives up fuel costs, insurance premiums, and delivery times for everything from crude oil to consumer goods.
Houthi Attacks Escalate
Since November, the Houthis have launched dozens of drone and missile strikes on commercial vessels in the Red Sea and Bab el-Mandeb. The group says it is targeting ships with Israeli links in solidarity with Palestinians in Gaza. Major shipping lines including Maersk, MSC, and Hapag-Lloyd have suspended Red Sea transits. Many now reroute via the Cape of Good Hope, a detour that adds about 3,500 nautical miles and up to two weeks per trip.
Prediction Market Signals
On Polymarket, a prediction platform, traders are betting on whether the Bab el-Mandeb will be officially closed. As of September 30, the market shows a 27.5% probability of a 'YES' outcome. That number has fluctuated with each new attack and shipping announcement. The market's existence itself reflects how seriously the shipping industry and traders view the threat.
What Rerouting Means for Global Trade
The longer route strains an already tight global shipping network. Container rates on Asia-Europe routes have spiked. War risk insurance premiums for vessels entering the Red Sea have jumped tenfold. Some ships are idling or waiting for naval escorts. The Suez Canal, which normally handles about 12% of global trade, is seeing fewer transits as ships avoid the region entirely.
The Houthis have shown no sign of backing down. Their attacks have continued even as the U.S. and UK launched airstrikes on Houthi positions in Yemen. The group's leadership has vowed to keep targeting ships until Israel ends its military campaign in Gaza.
What Comes Next
Shipping companies are watching for the next Houthi strike. The prediction market will update as new information comes in. For now, the Bab el-Mandeb remains effectively closed, and the Cape of Good Hope is the only safe option. The question is how long the rerouting will last — and whether the strait will ever fully reopen under current conditions.
