投資報酬率的計算公式: 投資報酬率 = 損益 / 投入成本 範例: 98/8/27買進鴻海1張,98/12/14全數賣出,其投資報酬率計算如下: 投入成本 = 109 x1,000 = 109,000 損益 = (142-109)x1,000 = 33,000 投資報酬率 = 33,000 / 109,000 = 30.28%
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