Houthi forces' rapid September 2026 advances along Yemen’s Red Sea coast and capture of Perim (Mayyun) Island, the Hanish islands, Mokha port, and Dhubab have placed both shores and key terrain in the Bab el-Mandeb under their control for the first time. Shipping transits have fallen sharply—often 40-60% below prior levels, with some days near 15 crossings—particularly affecting Saudi-linked vessels under the group’s maritime restrictions, though no formal closure has been declared and limited traffic continues. The UN Security Council has flagged heightened volatility without evidence of a full halt. These territorial gains raise the risk of further disruption or enforcement actions through year-end, while ongoing clashes, potential international responses, and rerouting via the Cape of Good Hope shape trader assessments of whether measurable traffic thresholds for effective closure will be met.
Résumé expérimental généré par IA à partir des données Polymarket. Ceci n'est pas un conseil de trading et ne joue aucun rôle dans la résolution de ce marché. · Mis à jourStrait 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.
Iran declares Strait of Hormuz closed; Houthis control Bab el-Mandeb navigation with restrictions
September 15 dips to 0%1%
Iran officially closed the Strait of Hormuz, while Houthi forces controlled navigation through Bab el-Mandeb, allowing passage for all except Saudi vessels, maintaining partial openness but increasing regional tensions.

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