〔Overnight Brief〕Brent Near $108, WTI $104: Houthi Seizure of Mokha Puts Bab al-Mandab Beside Hormuz — Two Chokepoints Lit, ~7% of Global Oil in a New Crosshair

0. Overnight Arc

**[ESCALATED] Brent settled near $108, WTI traded through $104** in the Asian open, with intraday peaks of $108.42 (Brent) and $103.06 (WTI) — both benchmarks' largest one-day move in nearly two months and the highest since May 19 ^[1][2][3]. The mechanism is no longer a single strait: Houthi forces took the Red Sea port of Mokha and pressed toward the Bab al-Mandab on top of an already-disrupted Strait of Hormuz ^[2][4][5]. The bid is now being paid for two simultaneous chokepoint threats, not one ^[3][6]. Reuters' Kitco wire tags it as the biggest spike in shipping attacks since the Iran war began ^[7].

1. Chokepoint Geometry

• **[ONGOING] Strait of Hormuz** threat level remains "Serious" per the US-led Joint Maritime Information Center ^[8]. Iran's IRGC Navy says it intercepted a US unmanned surface vessel at the strait entrance; the UK Maritime agency reported two unknown vessels hit by four projectiles west of Oman, one on fire ^[9]. Likely oil slicks after US tanker strikes are independently confirmed by RFI and Al-Monitor ^[10][11]. The strait has been disrupted for over six months, per UN ESCAP at the 8th "Silk Road Maritime" forum in Fuzhou ^[12]. President Trump said the waterway should be renamed the "Trump Strait" ^[9].
• **[NEW] Bab al-Mandab / Red Sea.** Houthi forces have taken the Red Sea port of Mokha (Yemeni government officer, Reuters, BBC), the Hanish Islands, Dhubab district, and are pressing toward Zukar Island near the strait ^[2][4][9][5]. Per Kpler, ~7% of global oil production transited Bab al-Mandab in June ^[6]. Reuters links the Houthi advance to direct guidance from Iran's Revolutionary Guards, calling it a new front in the Iran-US war ^[13]. The Washington Post frames Houthi control of Bab al-Mandab as a Trump-administration setback given that Hormuz is already blocked ^[14]; the Reuters explainer calls Bab al-Mandab "one of the busiest and most contested global maritime chokepoints" ^[15].
• **[NEW] Single-source caveat:** the Houthi political office also said Red Sea and Bab al-Mandab passage for international ships is "not threatened" and remains safe ^[2]. Print the contradiction; do not average it.

2. Trigger Stack

• **[NEW] Nuclear visibility lost:** the IAEA says it has lost continuous visibility on Iranian nuclear activity and does not expect to resume inspections in the near term ^[16]. Trump warned that any nuclear work at Zirconium (镐山) would draw a "heavy strike" ^[9]. The US Treasury issued a new round of Iran-related sanctions ^[9].
• **[NEW] Ballistic-missile restart:** WSJ, relayed by Xinhua, reports Iran has used stored parts in underground facilities to resume ballistic-missile production ^[2]. CBS reports multiple US military aircraft damaged at Jordan's Muwaffaq al-Salti air base; Trump denies — print both, do not reconcile ^[9].
• **[NEW] Tactical de-escalation in one lane:** Iran temporarily suspended a 10% transit fee on foreign vessels carrying its energy products. Per geopolitical analyst Estefano Gomez, the move eases Hormuz pressure but does not signal broader de-escalation ^[17].
• **[NEW] Iraq tendering** two or more oil supertankers to perform Hormuz transits, protecting crude exports while the waterway is under military threat ^[18].
• **[NEW] US widening support:** the US is expanding intelligence and targeting support for Saudi operations against the Houthis ^[19]; Saudi Civil Defense issued an emergency alert for Abha ^[20]. The Saudi Air Force conducted 64 strikes on Taiz, Hodeidah, Marib, and Jawf in 24 hours ^[2].
• **[NEW] Spillover markets:** MarketWatch flags Russia outages and a "massive impact" on diesel on top of the Middle East bid ^[21]; the BBC prices oil at $105 on "no quick resolution" signs ^[22]; Bloomberg says US gasoline hit a record over the Labor Day weekend ^[23]. An Azerbaijani cargo ship in the Black Sea was hit by a drone, killing two Azerbaijani citizens — a separate flashpoint outside the Middle East ^[9].

3. Source Quality and What Would Falsify the Bid

• **Source quality control:** the Houthi "safe passage" claim is single-source and contradicts their own military advance — flag the contradiction, do not average ^[2]. The Trump-vs-CBS split on Jordan jet damage is unresolved: CBS says damaged, Trump denies; print both ^[9]. The slicks reports are independently confirmed by RFI and Al-Monitor but originate from expert assessment, not satellite imagery ^[10][11]. The WSJ missile-restart story runs via Xinhua relay, not the original WSJ copy ^[2]. Items ^[24] and ^[25] are general Google News headline mirrors ("Dire straits", "Oil Prices Rise Above $100") with no unique facts — treat as confirmations of the move, not as standalone sources.
• **Falsifiable tests:** a confirmed tanker strike inside Bab al-Mandab (not Hormuz) would extend the bid, because roughly 7% of global oil flows transit that waterway versus a much larger share through Hormuz ^[6]. Conversely, a Houthi withdrawal from Mokha, an Iran extension of the fee suspension into broader de-escalation, or a confirmed Saudi ground push to retake the port would unwind the second-chokepoint premium ^[2][17]. Treat the price as a band: settlement $102.48/$107.63 versus intraday peaks $103.06/$108.42 and Asian-open prints around $104/$108 ^[1][2][3]. The Reuters explainer on Bab al-Mandab and the WaPo strategic framing give the chokepoint read independent legs beyond the price action ^[14][15].