Shanghai International Energy Exchange data showed crude oil futures' main contract for October 2026 delivery settled at 583.40 yuan/barrel on Aug 20, down 1.90 yuan, or 0.32%. Total trading volume across all contracts reached 177,960 lots, while open interest fell 1,941 lots to 75,408 lots. The main contract saw volume of 145,376 lots, with open interest down 228 lots to 42,904 lots.