2025年12月主要指数样本股调整预测：多只电力设备行业股或将被调出沪深300指数

• The report predicts the adjustment of sample stocks for the CSI 300, CSI 500, and STAR 50 indices in December 2025[1][6] - The CSI 300 Index selects companies with good operating conditions, no violations, no major financial report issues, and no significant stock price anomalies[7] - The CSI 500 Index excludes CSI 300 sample stocks and the top 300 stocks by average market value, selecting companies with good operating conditions and no major issues[9][10] - The STAR 50 Index selects companies listed on the STAR Market with good operating conditions, no violations, and no major financial report issues[13] - The report provides detailed predictions for stocks to be included and excluded from each index based on average market value and average trading volume[8][11][14]