Huaan Securities·2025-10-16 07:20Investment Rating - Industry Rating: Overweight [1] Core Views - The chemical sector showed a weekly performance ranking of 8th with a gain of 1.99%, outperforming the Shanghai Composite Index by 1.63 percentage points and the ChiNext Index by 5.85 percentage points [4][22]. - The chemical industry is expected to continue its differentiated trend in 2025, with recommendations to focus on synthetic biology, pesticides, chromatography media, sweeteners, vitamins, light hydrocarbon chemicals, COC polymers, and MDI [4]. Summary by Sections Industry Performance - The chemical sector's overall performance for the week of October 9-10, 2025, was a gain of 1.99%, ranking 8th among sectors [22]. - The top three performing sub-sectors were phosphate and phosphorus chemicals (6.26%), titanium dioxide (4.23%), and oil and petrochemical trade (4.23%) [23]. Key Industry Dynamics - Synthetic biology is at a pivotal moment, with low-energy products expected to gain a longer growth window due to the adjustment of energy structures [4]. - The upcoming quota policy for third-generation refrigerants is anticipated to enter a high prosperity cycle, with demand expected to grow steadily due to market expansion in Southeast Asia [5]. - The electronic specialty gases market is characterized by high technical barriers and high added value, with significant opportunities for domestic substitution [6][8]. - The trend of light hydrocarbon chemicals is becoming global, with a shift towards lighter raw materials for olefin production [8]. - The COC polymer industry is accelerating its domestic industrialization process, driven by supply chain security concerns and the shift of downstream industries to domestic production [9]. - Potash fertilizer prices are expected to rebound as major producers reduce output and the demand for fertilizers increases due to rising grain prices [10]. - The MDI market is characterized by oligopoly, with a favorable supply structure expected as demand gradually recovers [12].