有關投資報酬率.. - 投資

By William
at 2007-09-22T01:46
at 2007-09-22T01:46
Table of Contents
有關報酬率實在是有點複雜..
因為網路上大家討論的報酬率都是一個數字..
連怎麼來的可能都不一樣..
另外像是投資型保單中的報酬率更是一絕..
它會在扣款過程中逐漸減少你的本金金額..
造成分母越來越小....當然報酬率就..........
假設..
a 投資本金50000 手續費1.5% = 750 獲利 1000 時間 20天
b 投資本金50000 手續費1.95% = 975 獲利 2000 時間 90天
1.簡單版..
Xa = 1000 / 50000 = 2%
Xb = 2000 / 50000 = 4%
2.進階版..
Xa = 1000 / (50000+750) = 1.97%
Xb = 2000 / (50000+975) = 3.92%
3.高階版..
Xa = (((51000 /(50000+750)) ^ (1/20)) -1) * 365 = 8.97%
Xb = (((52000 /(50000+975)) ^ (1/90)) -1) * 365 = 8.07%
想請問一下大家..
在討論報酬率的時候都是用哪一種算法在計算的??
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