**Houthi territorial gains in early-to-mid September 2026, including the seizure of Mokha port, Perim Island, and the Hanish Islands, have tightened control over the Bab al-Mandeb Strait, a critical chokepoint handling roughly 12% of global trade and significant oil and LNG flows.** These advances, following resumed attacks on Saudi-linked vessels since July, have boosted implied probabilities in related Polymarket contracts by strengthening the group’s ability to enforce blockades or conduct kinetic strikes on commercial shipping. Brent crude has hovered above $100 per barrel amid dual disruptions from the Strait of Hormuz and Red Sea routes, while Saudi crude exports via Yanbu and the Petroline pipeline face added pressure after reported pipeline attacks and shutdowns. Shipping volumes through the strait have declined sharply, with operators rerouting around the Cape of Good Hope at added costs of 10–20+ days and roughly $0.9–1 million per voyage, elevating global freight rates. Market-implied odds reflect trader consensus on these dynamics, with skin-in-the-game positioning favoring near-term resolution dates due to the group’s enhanced positional leverage, though outcomes remain subject to military responses, diplomatic shifts, or enforcement capacity. Key upcoming catalysts include continued Houthi operations, Saudi or international naval activity, and any fresh data on transit volumes or energy prices.