Brent fell to $87.07 and West Texas Intermediate to $81.25 a barrel on 13 Aug 2026 after the IEA cut its 2026 global oil demand contraction forecast to 1.6 million barrels a day (from about 1 million). Supply risk remains: Iran says ships need its permission to transit the Strait of Hormuz, and Houthi drone attacks hit a Saudi Aramco refinery in Jazan. For a Thai SME, fuel and transport costs are still high and volatile; avoid locking in cost assumptions based on this one-day drop, and check your diesel and logistics budgets.