From supply shock to oil glut: IEA flags scale of demand destruction caused by Iran war

• Global oil deliveries plunged by 5 million barrels per day in Q2 2026, while supply dropped to 94.5 million bpd in May, down 600,000 bpd month-over-month and well below pre-war levels
• Oil prices have fallen to three-month lows (Brent at $78.44, WTI at $75.18) on expectations that the U.S.-Iran deal will reopen the Strait of Hormuz, with shipments already rebounding from 9.6 million bpd in May to around 12 million bpd
• Despite demand reductions, global oil inventories fell by 143 million barrels in May and could reach historic lows before shifting to surplus later this year, as supply chain normalization may take months

Market Summary: IEA Warns of Oil Glut Following Iran War Demand Destruction

Key Developments

The International Energy Agency (IEA) has dramatically downgraded its 2026 global oil demand outlook, cutting estimates by 700,000 barrels per day (bpd) to 1.1 million bpd year-over-year growth. This follows a severe 5 million bpd plunge in deliveries during Q2 2026, driven by elevated prices and refined product shortages stemming from the Iran conflict.

Supply and Demand Dynamics

Global oil supply dropped to 94.5 million bpd in May, down 600,000 bpd month-over-month and 13.6 million bpd below pre-war levels. Total 2026 supply is projected at 102.4 million bpd, down 3.9 million bpd year-over-year.

However, the IEA forecasts a dramatic reversal in 2027, with supply surging by approximately 8 million bpd to 110 million bpd, while demand recovers only 2 million bpd to 105.3 million bpd—creating a "significant overhang."

Market Impact

Oil prices have tumbled to three-month lows ahead of the U.S.-Iran peace deal signing in Geneva. Brent crude traded at $78.44 (down 0.7%), while WTI futures fell 1.1% to $75.18. Three Iranian tankers carrying nearly 5 million barrels have passed through the Strait of Hormuz, signaling potential supply normalization.

Critical Warnings

Despite demand destruction, global inventories fell 143 million barrels in May alone, with total drawdowns of 3.8 million bpd since the conflict began February 28. The IEA warns stocks could reach "historic lows" before the market shifts to surplus later this year, though full supply chain recovery may take months due to mine removal and logistical challenges.