液氯、聚合MDI价格涨幅居前，建议关注机器人相关化工材料

Investment Rating - The report suggests a focus on chemical materials related to robotics, particularly modified plastics [5]. Core Viewpoints - The chemical sector showed a weekly increase of 2.07%, outperforming the Shanghai A-share index by 0.15 percentage points [2]. - The report highlights significant price increases in liquid chlorine (+134.15%) and polymer MDI (+5.02%) among other chemicals [4]. - It recommends attention to companies like Dawn Co. and Huitong Co. for their potential in the robotics field [5]. Industry Performance - The chemical sector's dynamic PE is at 27.29 times, lower than the average PE of 12.39 times since 2015 [2]. - Among 28 sub-industries, five showed the highest growth: fluorochemicals and refrigerants (+5.67%), other rubber products (+4.32%), paint and ink manufacturing (+4.01%), other fibers (+3.96%), and daily chemicals (+3.59%) [3][15]. - The top five stocks by weekly increase were: Yuzhong Three Gorges A (+35.57%), Hengtian Hailong (+24.82%), Lingpai Technology (+17.55%), Danhua Technology (+15.19%), and Jinpu Titanium Industry (+13.5%) [2][12]. Price and Spread Trends - The report lists the top five products with the highest weekly price increases: liquid chlorine (+134.15%), polymer MDI (+5.02%), sulfur (+3.9%), automotive urea granules (+3.59%), and urea (+3.46%) [4][19]. - The highest price spread increases were seen in ethylene spread (+2075%), propylene (methanol-based) spread (+210.26%), and melamine spread (+149.41%) [4][36]. Inventory Changes - Significant inventory changes were noted, with polyester filament increasing by 24.59% and ethylene decreasing by 16.27% [5][56].