Herd behavior has an impact on present stock return, buy-herding behavior lead to the positive abnormal return, and sell-herding behavior results negative abnormal return.

基金羊群行为对股票当期收益存在显著影响，买入羊群行为使股票出现正超额收益，卖出羊群行为使股票出现负超额收益。

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There was a very significant negative association between the attack rate and the herd immunity (P<0.01).

罹患率与流行前群体免疫呈非常显著的负相关（P<0.01）。

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There was a very significant negative association between the attack rate and the herd immunity (P<0.01).

罹患率与流行前群体免疫呈非常显著的负相关（P<0.01）。

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