大炼化周报：主流长丝企业减产，下游集中采买推动库存去化-20250817

Investment Rating - The industry investment rating is "Positive" as the industry index is expected to outperform the benchmark [137]. Core Insights - The report highlights that mainstream filament enterprises are reducing production, while downstream concentrated purchasing is driving inventory reduction [2]. - The Brent crude oil weekly average price as of August 15, 2025, was $66.33 per barrel, reflecting a decrease of 2.00% [2][3]. - The domestic key refining project price difference was 2400.36 CNY/ton, with a week-on-week increase of 27.32 CNY/ton (+1.15%) [2][3]. - The report indicates a mixed performance in the chemical sector, with some products experiencing price increases due to supply constraints [2]. Summary by Sections Refining Sector - Market sentiment is cautious due to geopolitical events and rising U.S. oil production, leading to a slight decline in international oil prices [2][13]. - Domestic refined oil prices are fluctuating, with diesel, gasoline, and aviation kerosene averaging 7015.71 CNY/ton, 8122.57 CNY/ton, and 5978.29 CNY/ton respectively [13]. Chemical Sector - The report notes that the cost support for chemicals is weak, leading to varied price movements, but overall price differences are expanding [2][40]. - Polyethylene prices have seen a slight increase, with LDPE, LLDPE, and HDPE averaging 9535.71 CNY/ton, 7314.00 CNY/ton, and 8000.00 CNY/ton respectively [48]. Polyester Sector - The polyester industry chain is experiencing stable prices, with significant inventory reduction in filament due to production cuts and concentrated purchasing [2][99]. - The average price for polyester filament is reported at 6717.86 CNY/ton for POY, 7060.71 CNY/ton for FDY, and 7928.57 CNY/ton for DTY [99]. Market Performance of Major Refining Companies - As of August 15, 2025, the stock price changes for six major refining companies were as follows: Rongsheng Petrochemical (+0.88%), Hengli Petrochemical (-0.59%), Dongfang Shenghong (+0.34%), Hengyi Petrochemical (+2.35%), Tongkun Co. (+6.16%), and Xin Fengming (+8.70%) [124]. - Over the past month, the stock price changes were: Rongsheng Petrochemical (+7.21%), Hengli Petrochemical (+8.36%), Dongfang Shenghong (+3.24%), Hengyi Petrochemical (+3.22%), Tongkun Co. (+17.49%), and Xin Fengming (+21.50%) [124].