Oil Surges 21% in July as US-Iran War Strains Global Supply Chain

The Quick Take

• Oil prices headed for a 21% monthly surge in July as the US-Iran conflict severely constrained Middle East energy supply routes
• Energy markets recorded double-digit percentage gains across oil and refined products including diesel during the month
• Singapore is monitoring oil price impacts given its position as Asia's major petroleum trading and refining hub

Oil markets recorded extraordinary gains in July 2026, with prices on track for a 21% monthly increase as the US-Iran military conflict disrupted energy supply flows through the Persian Gulf. Business Times Singapore reported that energy markets broadly surged, with both crude oil and downstream products like diesel posting double-digit percentage gains. The conflict has effectively disrupted approximately 20-25% of global oil transit routes through the Strait of Hormuz, the world's most critical energy chokepoint handling roughly 20 million barrels per day.

Singapore's position as Asia's premier petroleum trading hub places it at the center of regional supply chain stress. Refiners in Singapore — Exxon, Shell, and BP — face complex margin dynamics: while crude input costs surge alongside finished product prices, the spread between input and output determines actual profitability. Asian refiners dependent on Middle East crude are facing the sharpest cost increases, while North American refiners accessing WTI barrels gain competitive advantage. This regional divergence is redistributing global refining margin flows toward Americas-proximate refiners.

Watch Iran-US ceasefire negotiations or any diplomatic resolution as the primary catalyst for oil price correction — a ceasefire could see sharp downside reversion in a short covering event. OPEC+ emergency production decisions are the secondary catalyst: Saudi Arabia and UAE have spare capacity that could partially offset disruption volumes if they choose to deploy it. The macro variable is global recession risk — sustained oil above $120/barrel historically triggers demand destruction and GDP contraction that ultimately reverses the oil price spike.

Synthesized from 1 source.