Donghai Securities·2025-09-23 11:08Investment Rating - The report gives an "Overweight" rating for the chemical industry [1] Core Viewpoints - The supply side is expected to undergo structural optimization, with a focus on selecting elastic and advantageous sectors. Domestic policies frequently emphasize supply-side requirements, while rising raw material costs and capacity exits in Europe and the U.S. have impacted overseas chemical companies. In the long term, China's chemical industry has a clear competitive advantage, with significant cost benefits and technological advancements, allowing Chinese companies to fill gaps in the international supply chain [6][16] Summary by Sections 1. Industry News and Event Commentary - Prices of third-generation refrigerants continue to rise, indicating a high level of industry prosperity. The supply of refrigerants is constrained by quotas, and increased downstream demand has significantly optimized the supply-demand balance. Prices for R32, R134a, and R125 have increased by 44.19%, 22.35%, and 8.33% respectively this year. Major refrigerant producers have seen substantial profit growth, with companies like Juhua Co., Sanmei Co., and Yonghe Co. reporting net profit increases of 145.84%, 159.22%, and 140.82% year-on-year in the first half of 2025 [15][8] 2. Chemical Sector Weekly Performance - For the week of September 15-21, 2025, the CSI 300 index fell by 0.44%, while the Shenwan Chemical Index dropped by 1.33%, underperforming the market by 0.89 percentage points. The Shenwan Oil and Petrochemical Index decreased by 1.99%, also underperforming the market [18][21] 3. Key Product Price Trends - The top price increases for the week included butyl acrylate (3.86%), bisphenol A (3.75%), and phenol (3.31%). Conversely, the largest price declines were seen in nitric acid (-3.11%), liquid ammonia (-2.71%), and caustic soda (-2.44%) [29][31]