基础化工行业双周报（2025、7、11-2025、7、24）：反内卷浪潮下，可关注有机硅等细分板块-20250725

Investment Rating - The report maintains an "Overweight" rating for the basic chemical industry [1] Core Viewpoints - The report highlights the importance of addressing "involution" in the industry, suggesting potential investment opportunities in segments like organic silicon, polyester bottle flakes, and refrigerants [32][33] - The basic chemical industry has shown signs of improvement in supply-demand dynamics, particularly in organic silicon and polyester bottle flakes, due to reduced new capacity and increased demand from emerging sectors [32][33] Summary by Sections Market Review - As of July 24, 2025, the CITIC basic chemical industry has risen by 5.01% over the past two weeks, outperforming the CSI 300 index by 1.54 percentage points [14] - Year-to-date, the industry has increased by 15.16%, also surpassing the CSI 300 index by 9.72 percentage points [14] Chemical Product Price Trends - The top five chemical products with the highest price increases recently include Vitamin D3 (+12.12%), organic silicon DMC (+11.61%), synthetic ammonia (+8.16%), TDI (+7.71%), and paraquat (+7.69%) [23] - Conversely, the products with the largest price declines include PVDF powder (-10.34%), dichloropropane-white (-7.32%), hydrochloric acid (-6.32%), DMF (-4.60%), and reactive dyes (-4.35%) [23] Industry News - The report notes that the organic silicon industry has reached the end of a rapid expansion phase, with supply growth expected to slow down while demand from sectors like new energy vehicles and photovoltaics remains strong [32][33] - The polyester bottle flakes sector is experiencing a decrease in operating rates, which has led to a slight price recovery [33] Company Announcements - Companies such as Hesheng Silicon Industry (603260) and Xingfa Group (600141) are recommended for investment due to the expected recovery in organic silicon prices and profitability [32][33] - Wan Kai New Materials (301216) is highlighted for its potential in the polyester bottle flakes market, while Sanmei Co. (603379) and Juhua Co. (600160) are noted for their performance in the refrigerant sector [32][33]