【正文】
率 含本金收益率為 1加單期投資收益率6歷史平均收益率的度量 代數(shù)平均值( arithmetic mean, 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