The intensifying U.S.-Israeli military campaign against Iran has jolted global oil markets, with the Strait of Hormuz — the narrow waterway that carries about one-fifth of the world’s daily seaborne crude and significant LNG volumes — now largely inaccessible to commercial vessels due to security threats, tanker attacks, and rising regional tensions.
The disruption, now entering its second week, has forced several major Middle Eastern producers to cut output as storage facilities fill up and exports stall. Iraq has already curtailed nearly 1.5 million barrels per day, while Qatar has halted LNG production, with Kuwait and potentially other producers considering similar moves. The result has been a sharp surge in benchmark prices, with Brent crude settling at $92.69 per barrel on March 6 — its highest close since October 2023 — amid growing concerns about prolonged supply shortages.
The supply gap has triggered a rush to secure alternative crude, particularly heavy and medium sour grades preferred by Asian refineries. U.S. Gulf Coast crude varieties have emerged as key substitutes, driving strong demand. Mars sour crude, a flagship grade from the Gulf of Mexico, traded at about an $11 premium to West Texas Intermediate (WTI) on Friday — the widest spread since April 2020 and a steep rise from roughly $1.50 just a week earlier, according to brokers.
“Refiners that rely on these grades will need to find similar alternatives to replace the lost barrels. Mars and other U.S. Gulf sour and medium-heavy crudes are natural substitutes and are being bid up aggressively,” said Matt Smith, lead Americas oil analyst at Kpler, as quoted by Reuters. He noted that buyers, particularly in Asia, are actively seeking these grades.
Seasonal demand is also adding to market pressure as the transition toward the summer driving season typically increases crude consumption. “This time of year marks the shift from winter into the driving season, when demand generally rises across crude grades,” said Tim Snyder, chief economist at Matador Economics, also cited by Reuters. However, he stressed that the main driver of the price surge remains supply disruptions caused by the conflict.
Market participants say the tight conditions are likely to keep price differentials elevated until safe passage through the Strait of Hormuz is restored, potentially requiring naval escorts or other security arrangements to reopen the route.
Ripple effects on key economies
Asian economies that rely heavily on Middle Eastern crude transported through the Hormuz chokepoint are likely to bear the brunt of the disruption, while some exporters could benefit.
- India: With a significant share of its crude imports sourced from the Persian Gulf, India faces rising costs and supply risks. Refiners are increasing purchases from alternative suppliers such as Russia to cushion the impact, but disruptions could affect not only fuel availability but also fertilizers and other essential inputs, raising concerns about inflation and agricultural costs.
- Singapore: As a major refining and trading hub dependent on imported crude and petroleum products, Singapore is grappling with higher feedstock costs and logistical challenges as shipping routes are rerouted, placing pressure on its export-driven energy trade.
- China: The world’s largest oil importer is adjusting refinery operations and confronting higher import costs as Gulf supplies tighten. Although diversification toward non-Middle Eastern suppliers is accelerating, the immediate supply pressure could weigh on industrial activity.
- Russia: Positioned outside the conflict zone, Russia is benefiting from increased Asian demand for its crude exports, allowing it to secure stronger prices and higher volumes — offering an economic boost amid broader geopolitical pressures.
With no immediate end to the conflict in sight, energy traders and policymakers worldwide are preparing for continued market volatility. Extended disruptions could fuel inflationary pressures, strain global supply chains, and prompt policy responses, highlighting how quickly regional conflicts can reshape global economic stability.
Energy Trade and Shipping Corridors
Beyond commodity markets, the disruption in the Strait of Hormuz is also affecting global energy trade routes and maritime logistics networks. The waterway serves as one of the world’s most critical shipping corridors for crude oil, refined products, and liquefied natural gas moving from the Gulf to Asia and Europe. Prolonged restrictions on tanker movements could force energy traders and shipping companies to reroute cargoes, increase insurance costs, and extend delivery times, underscoring the strategic role of maritime infrastructure in the functioning of global energy trade.