对股价指数修正方法的再修正

《广义股价指数的修正方法研究》发表后①，连续收到一些读者来信，提出的问题主要有：如果股价平均数的样本股中有多种股票发生非交易性变异，如何运用除数修正法和股价修正法进行修正？从例题计算结果看，修正后股价自然变动状态下的平均数（Ｐ１）出现了间断或偏差，其...

Re-smooth on Stock Index Smoothing Method

Smoothing method adopted by world famous stock price averages, such as Dow-Jones stock index, New York Time stock index, removes the impacts of nontransactional variations, but “post-smoothing bias” is occurred in the average. Based on further discussion on methodology of smoothing stock indices, the form, nature and impacts of “post-smoothing bias” was analyzed, re-smoothing method to remove “post-smoothing bias” was raised, and the application of re-smoothing method in the generalized stock indices was discussed.