“反内卷”破局传统赛道，高端化打开成长空间

Core Viewpoint - The construction materials industry is expected to see improved profitability and demand in 2025, driven by "anti-involution" policies and a gradual recovery in key product demand [1][2]. Fundamental Analysis - In the first three quarters of 2025, demand for major construction materials showed slight improvement, while "anti-involution" policies positively impacted supply-side dynamics, leading to improved profitability across various sub-sectors [2]. - The construction materials index rose by 20.8% from January 2 to December 23, 2025, ranking 11th among all sectors, while the CSI 300 index increased by 17.43% during the same period [1][2]. Real Estate and Infrastructure - The real estate market continues to stabilize, with a downward trend in sales and completion rates, alongside declining housing prices; however, inventory reduction is evident as the area of unsold commercial housing has been decreasing since early 2025 [2]. - Infrastructure investment growth is declining despite an increase in the scale of special bonds directed towards land reserves [2]. Investment Recommendations - Focus on two main lines: 1. "Anti-involution" policies are expected to alleviate overcapacity issues in the construction materials sector, with an emphasis on traditional materials [2]. 2. The demand for high-end fiberglass products is anticipated to enhance industry profitability [2]. Sector-Specific Insights - Cement: The ongoing "anti-involution" policies are expected to ease overcapacity in the cement industry, with a long-term improvement in supply-demand dynamics anticipated to boost profitability, particularly for leading companies like Conch Cement [3]. - Float Glass: Demand remains weak, but supply-side changes from "anti-involution" policies may improve the supply-demand balance; companies like Xinyi Glass are recommended for attention [3]. - Photovoltaic Glass: The industry is currently facing overcapacity, but leading companies with cost advantages are likely to benefit from improved supply-demand conditions as "anti-involution" policies are implemented [3]. - Consumer Building Materials: The increasing proportion of aging housing is expected to drive demand for renovation-related building materials, with companies like Skshu Paint and Beixin Building Materials highlighted for potential investment [3]. Fiberglass Sector - The "anti-involution" policies are expected to prevent redundant capacity and curb vicious price competition in the fiberglass sector, with rising demand for mid-to-high-end fiberglass products likely to enhance profitability; companies such as China Jushi and Zhongcai Technology are recommended for investment [4].