印度叫停对华钛白粉反倾销税，西湖集团关停在美4家工厂

Investment Rating - The industry investment rating is "Overweight" [1] Core Insights - The chemical sector 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][5] - The recent suspension of anti-dumping duties on titanium dioxide by India is anticipated to allow Chinese companies to regain market share lost to competitors during the duty period [35] - The closure of four factories by Westlake Group in the U.S. is a strategic move to enhance profitability in high-performance and basic materials [35] Industry Performance - The chemical sector ranked 5th in overall performance for the week of December 15-19, 2025, with a gain of 2.58%, outperforming the Shanghai Composite Index by 2.55 percentage points [3][20] - The polyurethane sub-sector showed the highest increase at 9.04%, while non-metallic materials III experienced a decline of 2.29% [21] Specific Industry Trends - Synthetic biology is at a pivotal moment, with low-energy products expected to see significant growth due to energy structure adjustments [5] - The third-generation refrigerants are entering a high prosperity cycle as supply constraints tighten and demand remains stable [6] - The electronic specialty gases market presents substantial opportunities for domestic companies due to high technical barriers and increasing demand from semiconductor and photovoltaic sectors [7][8] - The trend towards light hydrocarbon chemicals is becoming global, with a shift from heavy naphtha to lighter feedstocks like ethane and propane [8] - The COC polymer industry is accelerating its domestic industrialization, driven by local demand and supply chain security concerns [9] - Potash prices are expected to rebound as major producers reduce output, leading to a tightening supply situation [10] - The MDI market is characterized by oligopoly, with a favorable supply structure anticipated as demand recovers [11]