大炼化周报：EVA供给依旧偏紧，价格及价差继续上行-20250920

Investment Rating - The industry investment rating is "Positive" as the industry index is expected to outperform the benchmark [146] Core Viewpoints - The EVA supply remains tight, leading to continued price and margin increases [2] - Brent crude oil average price for the week ending September 19, 2025, was $67.55 per barrel, reflecting a week-on-week increase of 1.62% [2][3] - Domestic and international refined oil prices have seen slight increases, with domestic refined oil price margins narrowing and overseas margins widening [2] Summary by Sections Refining Sector - Domestic key refining project price margin was 2380.87 CNY/ton, a decrease of 15.72 CNY/ton (-0.66%) week-on-week, while the international margin was 1176.66 CNY/ton, down 16.22 CNY/ton (-1.36%) [2][3] - Brent and WTI crude oil prices on September 19, 2025, were $66.68 and $62.68 per barrel, respectively, showing slight declines from the previous week [16] - Domestic diesel, gasoline, and aviation kerosene average prices were 6936.14 CNY/ton, 8019.29 CNY/ton, and 5976.50 CNY/ton, respectively, with corresponding price margins against crude oil [16] Chemical Sector - EVA prices continued to rise, with an average price of 11842.86 CNY/ton, and the EVA-crude oil price margin increased to 8338.71 CNY/ton [56] - Polypropylene prices showed a downward trend due to weak demand, with average prices for various types of polypropylene reported [72] - MMA prices increased significantly due to supply-side factors and pre-holiday stocking demand, with an average price of 9882.14 CNY/ton [72] Polyester & Nylon Sector - PX prices showed a slight decline, with the current average price at 5926.85 CNY/ton, and the PX-crude oil price margin at 2423.52 CNY/ton [87] - PTA prices decreased, with the average price at 4592.86 CNY/ton and the industry average profit margin remaining negative [96] - The average price for polyester filament yarns decreased due to weak demand, with average prices reported for different types of yarns [104]