Ret_PlusOne this is the return from the time Ret_180 is measured on day D to the close of trading on day D+1 approximately 1day This is a target variable you need to predict as id_61 Ret_PlusTwo this

因为Ret_PlusOne和Ret_PlusTwo是特定时间段内的收益率，而不是在一个特定时间窗口内的平均收益率。因此，它们不需要考虑行之间的时间依赖性，而是只需要考虑在特定时间段内的市场变化和个股表现。

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