Sou Hu Cai Jing·2025-11-30 09:44Core Viewpoint - Multiple indices in the A-share market are undergoing significant adjustments, with sample stocks being updated for various indices including the Shanghai Composite, ChiNext, and others, effective from December 12, 2025, and December 15, 2025 [1][2][4]. Group 1: Index Adjustments - The Shanghai Stock Exchange announced adjustments to the Shanghai 50, Shanghai 180, and Shanghai 380 indices, with changes to sample stocks effective after market close on December 12, 2025 [2][13]. - The Shanghai 50 index will replace four stocks: SAIC Motor, Northern Rare Earth, Huadian New Energy, and Zhongke Shuguang, while removing Poly Development, China Mobile, China Aluminum, and CRRC [2][3]. - The Sci-Tech Innovation 50 index will add two stocks: Aojie Technology and Shengke Communication, while removing Huaxi Biotechnology and Hangcai Co [3][4]. Group 2: Shenzhen Stock Exchange Adjustments - The Shenzhen Stock Exchange will implement sample stock adjustments for the Shenzhen Component Index, ChiNext Index, and others, effective December 15, 2025 [4][6]. - The Shenzhen Component Index will add 17 stocks including Tuowei Information, Sifang Chuangxin, and Wolong Nuclear Materials, while removing Guoyao Yizhi, Haide Shares, and Tibet Mining [4][6]. - The ChiNext Index will add eight stocks including Shuanglin Co., Changshan Pharmaceutical, and Changsheng Bearing [8]. Group 3: Other Index Adjustments - The China Securities Index Company announced adjustments for the CSI 300, CSI 500, and other indices, effective after market close on December 12, 2025 [11][13]. - The CSI 300 index will replace 11 stocks, adding Huadian New Energy, Shenghong Technology, Dongshan Precision, and others, while removing FAW Liberation, Oppein Home, and others [13][14]. - The CSI 500 index will replace 50 stocks, the CSI 1000 index will replace 100 stocks, and other indices will also see various adjustments [14].