明日生效，A股重要调整

Group 1 - The sample adjustments for indices such as the Shenzhen Component Index and the ChiNext Index will be officially implemented tomorrow, while adjustments for the SSE 50, STAR 50, and CSI A50 indices have already taken effect after the market close on December 12 [1][6] - The CSI 300 Index will replace 11 samples, including Huadian New Energy, Dongshan Precision, Guiding Compass, and Shenghong Technology [1][6] - The CSI 500 Index will replace 50 samples, including Heertai, Huahong Semiconductor, Oriental Yuhong, and Trina Solar [1][6] - The CSI 1000 Index will replace 100 samples, including Shijia Photon, Yongding Co., Wangfujing, and Dekoli [1][6] - The CSI A50 Index will replace 4 samples, including Huagong Technology, Guangqi Technology, Zhongji Xuchuang, and Shenghong Technology [1][6] - The CSI A100 Index will replace 6 samples, including Dongfang Fortune, Shenghong Technology, Zhongke Shuguang, and Silis [1][6] - The CSI A500 Index will replace 20 samples, including Guotai Haitong, Chipone, and Guiding Compass [1][6] - The SSE 50 Index will replace 4 samples, including SAIC Motor, Northern Rare Earth, and Zhongke Shuguang [1][6] - The SSE 180 Index will replace 7 samples, including Guotou Capital, Zhongtian Technology, and Ruixin Micro [1][6] - The SSE 380 Index will replace 38 samples, including COSCO Shipping Energy, Jinfat Technology, COSCO Oilfield Services, and Baiwei Storage [1][6] - The STAR 50 Index will replace 2 samples, including Aojie Technology and Shengke Communication [1][6] Group 2 - The Shenzhen Stock Exchange announced that the sample adjustments for the Shenzhen Component Index, ChiNext Index, Shenzhen 100, and ChiNext 50 will officially take effect on December 15, 2025 [2][7] - The Shenzhen Component Index will replace 17 samples, including Deep Shenzhen Housing A, Demingli, and Changxin Bochuang [2][7] - The ChiNext Index will replace 8 samples, including Shuanglin Co., Changshan Pharmaceutical, and Changxin Bochuang [3][8] - The Shenzhen 100 Index will replace 7 samples, including Cangge Mining, Guohuo Aviation, Dongshan Precision, and Shenghong Technology [4][9] - The ChiNext 50 Index will replace 5 samples, including Changshan Pharmaceutical, Feiliwa, Changxin Bochuang, Jinli Yongci, and Xiechuang Data [5][10]