Mexico’s Mix Nears MX$70/b; US-Israel-Iran War Escalates

Escalating hostilities between the United States, Israel, and Iran have disrupted flows through the Strait of Hormuz, driving Brent prices above US$83/b and lifting Mexico’s crude export blend to a seven-month high. Higher oil prices can strengthen fiscal revenues for the federal government, even as global inflation risks, fuel price pressures, and potential demand destruction threaten trade and industrial activity. The impact spans oil exporters and refiners, shipping and LNG markets, and policymakers managing energy security, inflation, and macroeconomic stability.

The conflict between the United States, Israel, and Iran has sent shockwaves through global energy markets, pushing Mexico's crude export blend to its highest level in seven months and threatening a fresh inflationary wave across economies dependent on Middle Eastern oil and gas. The Mexican export oil mix closed Monday at US$66.63/b, a 5% jump from US$63.46/b the previous Friday. This was its largest single-week surge since Oct. 23, 2025, when US sanctions on Russian oil companies Rosneft and Lukoil triggered a 6.3% spike in a single session.

The immediate trigger is the closure of the Strait of Hormuz, the narrow waterway between Iran and Oman that serves as the world's most critical oil artery. Crude tanker transits through the strait fell to just four vessels on March 1, the day after hostilities broke out, versus a daily average of 24 since January, according to vessel-tracking firm Vortexa. Tehran has attacked five ships since the closure began, and as of Tuesday the strait has been blocked for four consecutive days, stranding hundreds of tankers loaded with crude and liquefied natural gas near regional hubs such as Fujairah in the United Arab Emirates, unable to reach buyers in Asia and Europe.

The Strait of Hormuz carries approximately 20% of global oil supply and over 10Bcf/d of LNG. According to the US Energy Information Administration, about 20MMb/d of crude oil flows through the strait, representing roughly 20% of the world's petroleum liquids consumption, with over 80% of that volume destined for Asian markets. With that artery now effectively shut, markets are pricing in both an immediate supply shock and the logistical fallout of rerouting.

The benchmark Brent crude contract rose nearly 8% on Tuesday to above US$83/b, its highest level since July 2024, taking gains since Friday to more than 15%. European natural gas prices surged as much as 40% before paring gains, following an equivalent jump on Monday. The ripple effects extended to sugar, fertilizer, and soybean prices as well.

Neil Crosby, Deputy Vice President of Oil Analysis, Sparta, noted that even a partial or temporary disruption at Hormuz creates cascading effects well beyond direct production losses. "The Strait is a critical artery for global crude and product flows. Delays alone, including vessels anchoring, rerouting, or facing higher war risk premiums, can tighten effective supply almost instantly. That tends to feed directly into higher freight rates, stronger physical crude premiums OUTSIDE the Arabian Gulf, and firmer Brent-Dubai spreads," he said, adding that this tends to translate directly into higher freight rates, elevated physical crude premiums outside the Persian Gulf, and firmer Brent-Dubai differentials. He also cautioned that OPEC's recent production increase is unlikely to offset near-term logistical bottlenecks: "OPEC’s latest production increase is unlikely to offset short-term logistical bottlenecks. Saudi Arabia and the UAE do have some ability to redirect crude via Red Sea routes, but those adjustments take time and cannot fully compensate for large-scale Strait disruption in the immediate term."

The fallout beyond Hormuz has been swift. Qatar, one of the world's largest LNG exporters, shut down its liquefied natural gas facilities on Monday. Saudi Arabia suspended production at its largest domestic refinery. Iraq, OPEC's second-largest producer, has already cut 700Mb/d from the Rumaila field and 460Mb/d from West Qurna 2, and officials warned Tuesday of potential cuts exceeding 3MMb/d if shipping cannot resume. Chinese refiners have begun shutting units, and India has started rationing gas to industrial users.

For Mexico, the price surge arrives at a complex moment. President Claudia Sheinbaum has previously argued that Mexico is insulated from oil price swings as a consumer, given that virtually all domestically produced crude is refined within the country. As a net oil exporter, however, Mexico stands to benefit fiscally from elevated prices, provided the global disruption does not trigger a broader recession that dampens demand for Mexican exports. The federal government secured oil revenue protection through petroleum hedges contracted in early January, with Minister of Finance Edgar Amador Zamora confirming the operation while keeping the strike price and covered volumes confidential to protect the effectiveness of the hedge.

With US gasoline prices crossing US$3 per gallon for the first time since November, a politically sensitive threshold for the Trump administration, Washington is under pressure to act fast. Treasury Secretary Scott Bessent and Energy Secretary Chris Wright were expected to announce mitigation measures Tuesday, while Secretary of State Marco Rubio urged China to use its diplomatic leverage with Tehran to prevent further escalation. “Refiners are now facing a stark choice; how long to wait before filling their procurement needs with ex-AG crude? If costs are high enough, refinery runs may already be at risk,” considers Crosby.