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第14题计算所有股票收益率的标准差是否应该考虑流通市值(capt)作为权重? #11

@chuxinyuan

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@chuxinyuan

ret_sd = sd(ret)) %>%

计算市场或者行业指数或收益率时用流通市值(capt)作为权重,市场收益率即为所有股票的市值加权收益率,行业收益率即为各个行业内所有股票的市值加权收益率。

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