股指分红点位监控周报：市场短期调整，IF、IC及IM主力合约贴水幅度加深-20251104

• The report introduces the methodology for calculating index dividend points, which is crucial for accurately estimating the premium or discount of stock index futures contracts. The calculation considers the dividend impact of index constituent stocks, including their dividend amount, market capitalization, weight, and index closing price[39][40][44] - The weight of index constituent stocks is refined from monthly data provided by mainstream data providers to daily data disclosed by the China Securities Index Company. This ensures higher accuracy in capturing the daily weight changes of individual stocks[45][46] - The estimation of dividend amounts involves predicting net profits and dividend payout ratios. Net profit prediction is based on historical profit distribution dynamics, categorizing companies into stable and unstable profit distribution groups. Stable companies use historical patterns for prediction, while unstable ones rely on the previous year's profit as a forecast[47][50] - Dividend payout ratio prediction uses historical averages. If a company paid dividends last year, the previous year's payout ratio is used. If not, the average of the past three years is applied. Companies with no dividend history are assumed not to pay dividends[51][53] - The prediction of ex-dividend dates employs a linear extrapolation method based on the stability of historical interval days between dividend announcement and ex-dividend dates. Default dates are set for companies with insufficient historical data or no dividend history[55][56] - The accuracy of the dividend point estimation model is validated by comparing predicted dividend points with actual dividend points for major indices like the SSE 50, CSI 300, and CSI 500. The model shows high accuracy for SSE 50 and CSI 300, with errors around 5 points, while errors for CSI 500 are slightly larger, around 10 points[57][61]