GOLDEN SUN SECURITIES·2025-09-21 07:56Investment Rating - The investment rating for the construction materials sector is maintained as "Accumulate" [3] Core Viewpoints - The construction materials sector experienced a slight increase of 0.05% from September 15 to September 19, 2025, with cement and glass manufacturing sectors declining by 1.08% and 1.64% respectively, while fiberglass manufacturing and renovation materials increased by 0.60% and 1.19% respectively [1][12] - The Shanghai real estate policy continues to optimize, with further adjustments needed to stimulate the market [2] - The demand for cement is still in a bottoming process, with supply-side improvements expected due to increased production control measures [2][16] - The glass market is facing supply-demand contradictions, but self-discipline in production among photovoltaic glass manufacturers may alleviate some pressure [2][6] - The fiberglass market shows signs of recovery, with prices stabilizing after a price war and increasing demand from the wind power sector [2][7] Summary by Sections Cement Industry Tracking - As of September 19, 2025, the national cement price index is 338.4 CNY/ton, a decrease of 0.23% from the previous week, while the cement output increased by 3.2% to 2.744 million tons [3][16] - The utilization rate of cement clinker production capacity is at 53.06%, down 2.63 percentage points from the previous week [16] - The overall cement market is in a weak recovery phase, with demand from the construction sector still limited due to tight funding in real estate [16] Glass Industry Tracking - The average price of float glass is 1207.95 CNY/ton, with a weekly increase of 0.91% [6] - Inventory levels are decreasing, but the market remains under pressure due to high stock levels among intermediaries [6] Fiberglass Industry Tracking - The price of non-alkali fiberglass remains stable, with demand recovering slowly [7] - The market for electronic yarn shows varied performance, with some high-end products experiencing tight supply [7] Consumer Building Materials - The consumer building materials sector is benefiting from favorable second-hand housing transactions and consumption stimulus policies [2] - Key stocks recommended include Beixin Building Materials and Weixing New Materials, with a focus on companies with growth potential [2][9] Carbon Fiber Industry Tracking - The carbon fiber market remains stable, with production costs at 107,000 CNY/ton and a negative gross margin [8]