At the same time there is no significant mean-reversion for the abnormal returns before and after the formation period in both 2000 semiannual ...

• 同时,2000年中报和2001年中报也没有发现形成期前后股票组合超常收益率明显的均值回复现象;基金羊群行为方向与股票组合超常收益率不相关。