績效指標
風險調整報酬

Sharpe Ratio

Definition

Sharpe Ratio是一種風險調整指標,衡量投資每單位總風險所獲得的超額報酬。Sharpe Ratio越高表明風險調整後的績效越好,通常認為1以上的值較為理想。

Formula

Sharpe Ratio=RpRfσp\text{Sharpe Ratio} = \frac{R_p - R_f}{\sigma_p}

Where:

  • RpR_p = Portfolio return
  • RfR_f = Risk-free rate
  • σp\sigma_p = Standard deviation of portfolio returns

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Sharpe Ratio Definition & Formula · PortfolioMetrics