On 27 Aug 2026 Brent rose $1.86 to $89.70 a barrel and West Texas Intermediate rose $1.30 to $83.53 after the US said it will not negotiate with Iran and will expand sanctions on countries doing business with Iran. Hormuz shipping recovered only slightly, with 10 cargo ships transiting after a low, still below the 10-day average of 15. For a Thai SME, expect pressure on diesel, transport and packaging costs. Review fuel surcharges in quotes, check fuel-cost assumptions in margins, and keep an eye on the baht and pump prices in the coming weeks.