化工行业周报2025年9月第3周：氯甲烷、丙烯酸异辛酯价格涨幅居前，建议关注市场空间大的新材料-20250923

Investment Rating - The report maintains a recommendation for the chemical industry, indicating a positive outlook for the sector [6]. Core Viewpoints - The report highlights significant price increases in chloromethane and isooctyl acrylate, suggesting a focus on new materials with substantial market potential [1]. - It recommends attention to Jiangshan Co., which is expected to benefit from rising glyphosate prices and has promising developments in innovative drugs [5]. - The DVA market is noted for its vast potential, with Daon Co. making key advancements in DVA products [5]. Industry Performance - In the third week of September, the chemical sector (Shenwan) declined by 1.33%, slightly underperforming the Shanghai A-share index, which fell by 1.31% [2][13]. - The dynamic PE for the chemical sector stands at 22.54 times, above the average PE of 12.20 times since 2015 [2][13]. Sub-industry Trends - Among the 31 sub-industries, 8 experienced gains while 23 saw declines. The top five gaining sub-industries included civil explosives (+7.72%) and modified plastics (+7.67%), while the top five declining sub-industries included carbon black (-5.25%) and other chemical raw materials (-4.74%) [3][17]. Chemical Prices and Spreads - The report lists the top five products with the highest weekly price increases: liquid chlorine (+22.93%), monochloromethane (+19.44%), and isooctyl acrylate (+7.47%) [4][22]. - The report also details the top five products with the largest price spread increases, including aniline spread (+17.56%) and ethylene spread (+13.17%) [4][34]. Inventory Changes - Significant inventory changes were noted, with ethylene glycol increasing by 25.67% and polyester chips by 11.98%, while epoxy propane saw a decrease of 10.44% [5][52].