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持有期回報HPR)是Holding Period Return的縮寫，其計算公式為持有期股票或債券價值與起初價值的比值。而持有期收益率(HPY)則是持有期回報與1的差額。兩者并非等價。

·Return over A Holding Period –Holding Period Return (HPR) – –Holding Period Yield (HPY) HPY=HPR-1 –Annual HPR and HPY Annual HPR=HPR1/n Annual HPY= Annual HPR -1=HPR1/n – 1 where n=number of years of the investment