大炼化周报：下游集中采买，长丝库存大幅去化-20250727

Investment Rating - The industry investment rating is "Neutral" based on the performance of the industry index relative to the benchmark [135] Core Viewpoints - The report highlights a significant reduction in inventory for polyester filament due to concentrated purchasing by downstream users, alongside a slight increase in upstream prices [1][96] - Brent crude oil prices experienced fluctuations, with a weekly average of $68.91 per barrel, reflecting a decrease of 0.27% [1][2] - The report indicates that the domestic price difference for key refining projects is 2387.33 CNY/ton, with a week-on-week decrease of 2.44% [2][1] Summary by Sections Refining Sector - The report notes that international oil prices rose initially due to a drone attack in Iraq but later fell due to concerns over economic activity and tariff negotiations [1][14] - Domestic and international refined oil prices are experiencing fluctuations, with domestic diesel and gasoline prices at 7117.86 CNY/ton and 8179.14 CNY/ton respectively [14] Chemical Sector - Demand for chemical products remains weak, leading to a slight decrease in price differentials for various chemicals [1][55] - Polypropylene prices have slightly decreased, with the average price at 6311.86 CNY/ton [70] Polyester Sector - The PX market is seeing a slight increase in supply, with prices rising to 6036.48 CNY/ton, and the PTA market is also showing price increases [87][98] - The report indicates that the average price for polyester filament is stable, with significant inventory reduction due to increased purchasing [96] Market Performance of Major Refining Companies - The report tracks the stock performance of six major refining companies, with notable increases in stock prices over the past week and month [123][124] - The overall performance of the refining index has increased by 26.53% since September 2017, outperforming the broader market [124]