金融工程｜专题报告：2025年12月指数样本调整预测

• The report predicts adjustments to the sample stocks of the CSI 300, CSI 500, and CSI Dividend indices for December 2025 based on their respective index compilation and periodic adjustment rules[13][14][21] - CSI 300 Index: The CSI 300 Index is composed of 300 securities with large scale, good liquidity, and high representativeness from the Shanghai and Shenzhen markets. The selection process involves determining the sample space and then selecting the top 300 securities based on daily average trading volume and market capitalization over the past year. Adjustments are capped at 10% of the total sample size, with buffer zone rules applied to prioritize retention of existing samples and inclusion of new ones ranked within specific thresholds[14][15][16] - CSI 500 Index: The CSI 500 Index excludes the CSI 300 samples and the top 300 securities by market capitalization. The remaining securities are ranked by daily average trading volume and market capitalization, with the top 500 selected. Adjustments are also limited to 10% of the total sample size, with buffer zone rules ensuring the retention of old samples and prioritization of new ones ranked within specific thresholds[21][23] - CSI Dividend Index: This index selects 100 securities with high cash dividend yields, stable dividends, and sufficient liquidity. The selection process involves ranking securities by their average cash dividend yield over the past three years and applying liquidity and dividend payout ratio requirements. Adjustments are limited to 20% of the total sample size, with buffer zone rules applied to retain existing samples meeting specific criteria[25][26][28] - Predicted adjustments include the addition of 11 stocks to the CSI 300 Index, 50 stocks to the CSI 500 Index, and 7 stocks to the CSI Dividend Index. Examples of predicted additions include Huadian New Energy, Shenghong Technology, and Guangqi Technology for the CSI 300 Index; Electric Power Investment Energy, Supor, and Shenergy for the CSI 500 Index; and China National Offshore Oil Corporation, Sophia, and Baoxibird for the CSI Dividend Index[18][22][28]