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stockmeanreturn
后的日线数据计算
stockmeanreturn
begtdate,cyclecy_dayreturn
stockmeanreturn
inttodate20120101,…
stockcorr
refrefstockbetarefref
stockmeanreturn
ref,…
stockbeta
refrefstockcorrrefref
stockmeanreturn
ref,…
stockalpha
refrefstockcorrrefref
stockmeanreturn
ref,…