Houthi territorial gains along Yemen’s Red Sea coast in September 2026, including the seizure of Mokha, Perim Island, and the Hanish Islands, have given the group direct oversight of shipping lanes through the Bab el-Mandeb Strait, a key chokepoint handling roughly 11% of global maritime oil trade and container traffic. The Houthis declared a selective blockade targeting Saudi-linked vessels, prompting sharp drops in transits—often halved to around 15 vessels daily—along with higher war-risk insurance premiums and rerouting around the Cape of Good Hope. Oil prices have climbed above $100 per barrel amid these moves and related disruptions near the Strait of Hormuz. Trader consensus on Polymarket currently prices a roughly 22% probability of effective closure by December 31, defined by metrics such as IMF PortWatch data showing sustained low arrivals, reflecting the group’s stated limits on targeting and the absence of a blanket shutdown despite expanded leverage. Ongoing clashes and potential external responses remain key variables within the resolution window.
Experimentelle KI-generierte Zusammenfassung mit Polymarket-Daten. Dies ist keine Handelsberatung und spielt keine Rolle bei der Auflösung dieses Marktes. · AktualisiertBab el-Mandeb Strait shipping traffic hits historic lows, no closure recorded
By late September 2026, shipping traffic through the Bab el-Mandeb Strait reached historic lows with daily transit averages dropping to as low as 1 vessel by September 22. Despite this severe suppression, the strait was not effectively closed as transit calls never fell to or below 10 for a sustained 7-day moving average, leading markets to price near-zero probabilities for closure by end-September.
Strait of Hormuz remains closed by Iran; Bab el-Mandeb under Houthi control but open to non-Saudi vessels
As of September 18, Iran's closure of the Strait of Hormuz continued, while Houthis controlled Bab el-Mandeb, allowing navigation except for Saudi vessels. This selective blockade maintained transit above closure thresholds, influencing market pricing toward no full closure.

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