基础化工行业双周报（2025、8、29-2025、9、11）：涨价背景下，关注制冷剂板块机会-20250912

Investment Rating - The report maintains an "Overweight" rating for the basic chemical industry, indicating an expectation that the industry index will outperform the market index by more than 10% over the next six months [34]. Core Insights - The basic chemical index increased by 1.6% over the past two weeks, underperforming the CSI 300 index by 0.3 percentage points, ranking 16th among 31 industries. Year-to-date, the index has risen by 25.1%, outperforming the CSI 300 by 9.5 percentage points, ranking 9th among 31 industries [4][14]. - Among the sub-sectors, six out of seven saw price increases, with the chemical fiber sector up by 3.0%, plastics by 2.9%, and agricultural chemicals by 2.0%. Only the chemical raw materials sector experienced a slight decline of 0.01% [16]. - The report highlights significant price increases for major refrigerants in June 2025 compared to the beginning of the year, with R134a up by 15.29%, R125 by 8.33%, R32 by 22.09%, and R410A by 16.67% [28]. Summary by Sections Market Review - As of September 11, the basic chemical index has shown a year-to-date increase of 25.1%, with notable sub-sector performances including a 55.1% rise in the plastics sector and a 27.8% increase in the rubber sector [16][17]. Chemical Product Price Trends - Recent price movements include a 1.20% increase in hydrochloric acid and a 0.82% increase in refrigerant R32, while TDI and synthetic ammonia saw declines of 0.46% and 1.96%, respectively [21][22]. Key Company Announcements - Notable announcements include a profit distribution plan by Lingwei Technology and strategic adjustments by Qide New Materials regarding stock options and subsidiary management [26]. Industry Outlook - The report emphasizes the positive outlook for refrigerant companies due to rising prices and improved profitability, particularly for Sanmei Co. and Juhua Co., suggesting investors pay attention to these companies [28][29].