- Yemen’s Iran-backed Houthis have opened a second global maritime chokepoint in the US-Iran war: by declaring a blockade on Saudi oil shipments through the Bab al-Mandeb strait — the narrow passage connecting the Red Sea to the Gulf of Aden and the Indian Ocean — and firing on two Saudi vessels, the Houthis have threatened to simultaneously close two of the world’s most critical energy shipping routes; the Bab al-Mandeb carries approximately 6-7 million barrels of oil per day and serves as the gateway for supertankers routing from the Persian Gulf through the Red Sea to the Suez Canal and Mediterranean; a simultaneous closure of Hormuz (which carries 20+ million barrels per day) and Bab al-Mandeb would represent the most severe dual-chokepoint oil supply disruption in history, potentially affecting upward of 25-30% of globally traded seaborne oil at once.
- The market reaction was immediate and severe: Brent crude briefly hit $100/barrel on the news — the first time since the early weeks of the Iran conflict that oil crossed that psychological threshold — before pulling back to approximately $90 as markets assessed the probability that the Houthi threat would be sustained versus used as a leverage tool; the $10 intraday range ($90 to $100 and back) signals genuine market uncertainty about the second front’s durability and whether the US or Saudi Arabia will mount a military response that suppresses the Houthi threat before a sustained blockade can be established; the pullback may also reflect some peace talk speculation that circulates periodically in the market, though both Washington and Tehran have publicly dismissed near-term diplomatic prospects.
- The Houthi second front threatens to draw in regional military powers beyond the current US-Iran bilateral: Trump has explicitly stated Iran will be held responsible for Houthi attacks and threatened “major military punishment,” establishing a direct military link between Houthi maritime aggression and potential US strikes on Iran; Saudi Arabia has its own direct stake as the targeted party and has a history of military engagement in Yemen through the Saudi-led coalition; Israel may face pressure to engage if Houthi attacks expand to Israeli shipping (the Houthis targeted Israeli-linked vessels extensively in 2023-2024); and Pakistan — which has been serving as a mediator in the US-Iran conflict alongside Qatar — has both mediation interests and concerns about Red Sea shipping that affects its own trade routes; the involvement of multiple regional powers creates escalation pathways beyond the direct US-Iran dynamic.
- The strategic logic for the Houthis and Iran is clear: by opening a second front at minimal marginal cost (Yemen-based missile and drone capabilities already exist), Iran can amplify the economic pressure of the Hormuz conflict, force the US to divide its military attention between two theaters, and create additional oil supply disruption that raises the cost of the conflict for the US economy and consumers; for the US, the dilemma is that striking Iran in response to Houthi attacks (which Trump has threatened) escalates the bilateral conflict, while not striking validates the Houthi escalation and allows the second front to be established without consequence; Saudi Arabia and its oil infrastructure have now become a direct battlefield in the wider Iran-proxy conflict rather than an observer.
What Happened?
Yemen’s Iran-backed Houthis declared a blockade on Saudi oil shipments through the Bab al-Mandeb strait and attacked two Saudi tankers, opening a second maritime front in the US-Iran war. Brent crude briefly hit $100/barrel before pulling back to approximately $90. Trump declared Iran responsible for Houthi attacks and threatened “major military punishment.” The escalation threatens to draw Saudi Arabia, Israel, and Pakistan into a widening conflict.
Why It Matters?
The Bab al-Mandeb threat creates the scenario the oil market has feared most: simultaneous closure of two critical global energy chokepoints. Hormuz alone accounts for 20%+ of global seaborne oil; adding Bab al-Mandeb would push the combined disruption to potentially 25-30% of globally traded seaborne oil. At that scale, the oil shock would be inflationary at a magnitude that would force the Federal Reserve into rate hike territory and trigger a global economic slowdown. The brief $100 Brent print is a preview of where oil goes if both chokepoints remain closed simultaneously.
What’s Next?
Watch whether the Houthis execute sustained Bab al-Mandeb interdiction or whether the initial attacks are leverage tools; watch Saudi Arabia’s military response and whether the Saudi-led coalition expands operations against Houthi positions; watch whether the US strikes Houthi infrastructure in Yemen directly (separate from Iran strikes) in response to the Saudi tanker attacks; watch oil pricing at $90-100 as the market indicator of how traders are pricing the two-front closure scenario; and watch shipping insurance rates and tanker routing decisions (rerouting around the Cape of Good Hope vs. Suez) as real-time indicators of how the shipping industry is assessing the Bab al-Mandeb threat.
Source: The Wall Street Journal
