量化掘基系列之四十：重估央企红利：高股息、强防御与政策共振下的新主线

• The "CSI Central State-owned Enterprises Dividend 50 Index" (931231.CSI) is constructed based on a dual-dimension screening method combining "central enterprise attributes" and "high dividend yield factors" [38][39][43] - The index selects 50 listed companies with high cash dividend yields from central enterprises under the State-owned Assets Supervision and Administration Commission (SASAC) and includes companies with stable cash flows, continuous dividends, and clear dividend payout ratios [38][39][43] - The index's sample space includes A-shares and depositary receipts issued by red-chip enterprises, meeting criteria such as being controlled by SASAC, ranking in the top 80% in terms of average daily market value and trading volume over the past year, and maintaining a dividend payout ratio between 0 and 1 over the past three years [38][39][43] - The index is rebalanced annually, with adjustments implemented on the trading day following the second Friday of December each year [38][39][43] Index Backtesting Results - The CSI Central State-owned Enterprises Dividend 50 Index achieved a cumulative return of 7.65% and an annualized return of 5.70% from January 1, 2025, to December 1, 2025 [45][49][51] - The index's annualized volatility was 11.86%, with a Sharpe ratio of 0.31 and a maximum drawdown of 10.82% during the same period [45][49][51] - The weighted dividend yield of the index was 4.46%, ranking among the top in similar indices [49][51][60] Factor Exposure Analysis - Based on the Barra model, the index exhibits significant positive exposure to value factors such as high earnings yield and high book-to-price ratio, while showing negative exposure to risk factors like low beta and low residual volatility [68][70][72] - The index avoids momentum and growth factors, indicating a focus on stable, low-volatility assets rather than chasing market trends [68][70][72]