Hormuz and Bab el-Mandeb Traffic Slumps as Iran–US Talks Stall, Heightening Energy Supply Risks

Commodity ship traffic through the Strait of Hormuz and Bab el-Mandeb has fallen sharply in recent days, as heightened security risks and the lapse of a 60‑day US–Iran interim deal deter tankers from using the key energy corridors. The slowdown threatens to tighten effective seaborne supply of crude, products, LNG and LPG, while pushing freight and insurance premia higher for buyers dependent on Middle Eastern routes.

The reduction in traffic comes as negotiations to restore a ceasefire and fully reopen Hormuz remain stalled following the August 17 expiry of the interim agreement. Recent drone and missile attacks on tankers and commercial vessels in and around the Strait of Hormuz and the Red Sea have reinforced shipowners’ risk aversion, with some Asian and Gulf carriers reportedly rerouting or suspending transits.

Introduction

Ship‑tracking data from Kpler and other maritime monitors show commodity vessel transits via Hormuz dropping into single digits on recent days, well below already depressed post‑war levels, while crossings at Bab el‑Mandeb have also eased from prior peaks. Before the conflict, Hormuz handled close to one‑fifth of global crude and LNG trade, making any sustained slowdown systemically important for energy markets.

The security backdrop has deteriorated since early August. Iran has issued tougher conditions for reopening Hormuz, while the 60‑day framework deal meant to normalize traffic has effectively lapsed without replacement. Concurrent Houthi attacks and a declared blockade against Saudi‑linked shipping in the Red Sea and Bab el‑Mandeb have added a second chokepoint risk for tankers seeking alternative routes.

Immediate Market Impact

The sharp reduction in tanker throughput via Hormuz is constraining the flexibility of exporters in the Gulf to move crude, refined products, LNG and LPG to Asia and Europe. While some flows continue under military escort and via adjusted corridors through Omani and Iranian waters, the effective export capacity of the route remains significantly below pre‑war norms.

On the demand side, Asian refiners in India, China and Southeast Asia, along with European buyers, face rising basis risk and potential timing mismatches as voyages are delayed or diverted. Spot freight rates for tankers avoiding Hormuz and Bab el‑Mandeb have strengthened, and underwriters are charging higher war‑risk premia for calls in the Gulf and Red Sea, increasing delivered costs relative to Atlantic Basin alternatives.

Supply Chain Disruptions

Key supply chain risks include port congestion at safer regional hubs and longer voyage distances as ships reroute via the Cape of Good Hope or delay sailings pending clearer security guarantees. This lengthens tonne‑mile demand, tying up tanker capacity and tightening availability for prompt charters, especially for VLCCs and LNG carriers already reluctant to transit Hormuz.

At Bab el‑Mandeb, recent Houthi attacks on commercial vessels and port infrastructure near Yemen’s Mokha, alongside a declared blockade against Saudi‑linked shipping, have raised operational risk for ships entering the Red Sea. Some owners are choosing to bypass the Suez route entirely, adding days to Asian–European voyages and raising freight and insurance costs for both crude and containerized food and feed cargoes.

Middle Eastern exporters with limited pipeline alternatives, such as Iran and some Gulf producers, face the greatest disruption, while import‑dependent economies in South and East Asia are most exposed to timing delays and cost inflation. Disruptions are also feeding through to LPG loadings and petrochemical feedstock flows from the Gulf to Asia, complicating planning for downstream industrial users.

Commodities Potentially Affected

• Crude oil: Reduced Hormuz and Bab el‑Mandeb traffic cuts effective export capacity from key Gulf producers, supporting higher regional benchmarks and widening differentials versus Atlantic grades.
• Refined oil products: Jet, diesel and gasoline cargoes from Middle Eastern refineries to Europe and Asia face longer routes and higher freight, tightening prompt availability in deficit markets.
• LNG: With Hormuz central to Qatari and other Gulf LNG exports, reduced transits and heightened security risk can delay spot cargoes and increase price volatility in Asian and European gas hubs.
• LPG (propane and butane): Slower Gulf exports and selective routing raise supply risk for Asian and Latin American buyers reliant on Middle Eastern barrels for residential and petrochemical demand.
• Dry bulk agricultural commodities: While grain and oilseed volumes via these routes are smaller than energy flows, higher general freight and insurance costs for Red Sea and Gulf passages can lift delivered prices into the Middle East and East Africa.

Regional Trade Implications

Exporters with pipeline or alternative seaborne routes—such as Russia via its Baltic and Pacific ports, and US and Brazilian shippers via the Atlantic—may gain market share in Asia and Europe as buyers seek to diversify away from Gulf‑linked cargoes. Some Asian refiners are already signaling interest in securing longer‑term volumes from non‑Hormuz suppliers.

Conversely, Gulf producers without substantial bypass options face lower realized export volumes or steeper discounts to compensate buyers for added risk and cost. Importers in South Asia and the Middle East that rely heavily on Red Sea and Gulf routes may need to adjust procurement strategies, including building additional inventories or broadening supplier bases, to hedge against further disruptions.

Market Outlook

In the near term, energy markets are likely to price in a persistent security premium as long as vessel counts through Hormuz and Bab el‑Mandeb remain well below pre‑war baselines and the diplomatic track shows limited progress. Volatility in freight, crude benchmarks and LNG/LPG spot prices is likely to remain elevated, particularly around any new security incidents or announcements on US–Iran negotiations.

Traders will watch for any signs of a new interim framework to secure shipping lanes, changes in military escort arrangements, and shifts in Chinese and Indian tanker deployment policies, which can quickly alter available capacity through the chokepoints. Risk managers across the energy and food value chains may need to reassess routing assumptions, insurance coverage and inventory buffers heading into the fourth quarter.

CMB Market Insight

The latest contraction in traffic through Hormuz and Bab el‑Mandeb underscores that geopolitical constraints at maritime chokepoints remain a defining structural risk for global commodity flows. For energy and food‑importing economies, the combination of reduced route flexibility, higher freight and insurance costs, and elongated voyages will keep landed prices and basis volatility elevated.

For market participants, the episode reinforces the importance of diversifying supply sources, stress‑testing logistics for prolonged chokepoint disruption, and embedding higher geopolitical premia into hedging strategies. Until a durable security and transit framework is in place, traders should assume that sudden shifts in Gulf and Red Sea shipping conditions can rapidly reprice energy and, indirectly, agricultural commodity markets.