Line chart showing 7-day moving average of ship arrivals from January 2025 to February 2026 comparing traffic through the Strait of Hormuz and via the Cape of Good Hope. Hormuz arrivals fluctuate between roughly 95 and 115 for most of 2025 before dropping sharply in late November. By January 2026, arrivals fall from about 110 in October to around 55 — nearly a 50% decline. Meanwhile, arrivals via the Cape of Good Hope remain relatively stable between roughly 85 and 95, indicating vessels rerouted away from Hormuz during rising regional tensions.

Iran war oil prices: Brent Crude rises as Strait of Hormuz supply threatens global markets

Brent crude and global oil prices spiked sharply as conflict escalated following the U.S. and Israeli strikes on Iran.

Carriers are halting Hormuz transit

  • Shipping through the Strait of Hormuz — a chokepoint for about 20 % of global oil — has largely halted, heightening supply risk.
  • Major shipping lines have stopped routine transits through the Strait of Hormuz due to heightened conflict risk, forcing some vessels to seek safe shelter instead of continuing planned routes.
  • While the U.S. has reduced its reliance on imports, touching a a 40-year low, Asian economies remain highly dependent on this vital route.

  • Analysts have warned disruptions could push Brent prices even higher — potentially above $90–$100/b if the strait remains blocked.
  • But the broader conflict has macro-economic implications: inflation risk with higher gasoline prices, supply chain disruption, and policy responses from producers and consumers.
  • Oil markets have already seen a sharp weekly increase following renewed Middle East hostilities.
Line chart showing Brent crude oil futures in 2025–2026, with mid-June spikes tied to Israel-Iran conflict, an October drop due to oversupply, a December decline on rising supply and Ukraine peace progress, and a rebound to about $77 by late February 2026.
Brent crude oil futures with major events

Routes are being rethought

The crisis isn’t isolated to Red Sea risks — the Iran escalation is forcing a broader reassessment of global vessel routing including through Hormuz and alternative passages.

  • Freight impact hinges on how long the strait remains constrained. Short-term pauses may have limited price impacts, but prolonged disruption could reshape trade flows and freight costs.
  • Lloyd’s List notes ships have been ordered to seek safe shelter rather than continue original transit plans, reflecting escalating safety and insurance considerations for carriers.

Map of Iran highlighting key oil and commercial ports, including Kharg Island, Bandar Abbas, Bandar Khomeini, Bushehr, Bandar Shahid, Chabahar, Port of Anzali, Amirabad and Nowshahr. Kharg Island is identified as Iran’s largest oil export terminal, handling over 90% of the country’s oil exports. The Strait of Hormuz is marked near Bandar Abbas and noted as a chokepoint that carries roughly 25% of global oil shipments.