【正文】
ean, or mean) 代數(shù)平均值適合于對典型單期收益率的度量Arithmetic mean is a better measure of typical performance over single periods7? 幾何平均值( geometric mean) ? 幾何平均值適合于度量財富在多時期的平均變化率 Geometric mean is a better measure of the change in wealth over time? 幾何平均值與代數(shù)平均值之差取決于收益的波動性(方差) 歷史平均收益率的度量8用算術(shù)平均值