SINOLINK SECURITIES·2025-10-19 07:07Investment Rating - The report indicates a negative performance for the oil and petrochemical sector, which underperformed the Shanghai Composite Index by -2.59% [9]. Core Insights - Oil prices have declined due to increased supply from the Middle East and geopolitical tensions, with WTI and Brent prices at $57.46 and $61.08 respectively, reflecting a decrease of -1.44 and -3.97 [3]. - The refining sector is experiencing a cautious market sentiment, with average refining margins for major refineries dropping to 547.82 yuan/ton, down by 71.31 yuan/ton [3]. - Polyester demand is expected to improve marginally with the onset of cooler temperatures and upcoming orders for Double Eleven, although raw material price trends remain uncertain [3]. - The ethylene market is showing weakness, with domestic prices at 6385 yuan/ton, down by 2.67% from the previous week [3]. Market Review - The oil and petrochemical sector has seen a decline in various indices, with the polyester index dropping by -7.72% and the olefin index by -4.48% [9]. - The average operating rate for major domestic refineries is reported at 81.23%, a decrease of 1.03 percentage points from the previous week [3]. - The report highlights a significant increase in commercial crude oil inventories, with a rise of 352.4 million barrels week-on-week [3]. Price Tracking - Brent crude oil is currently priced at $61.06 per barrel, reflecting a -10.43% change from the previous quarter's average [12]. - The average profit level for polyester filament yarn (POY150D) has increased to 176.46 yuan/ton, up by 60.27 yuan/ton from the previous week [3]. - The price of propylene in Shandong is reported at 6215 yuan/ton, down by 3.94% from the previous week [12].