績效指標
風險調整報酬

Sortino Ratio

Definition

Sortino Ratio是一種風險調整指標,透過僅使用負偏差而非總風險來衡量投資相對於下行風險的超額報酬。Sortino Ratio越高表明風險調整後的績效越好。

Formula

Sortino Ratio=RpRfσd\text{Sortino Ratio} = \frac{R_p - R_f}{\sigma_d}

Where:

  • RpR_p = Portfolio return
  • RfR_f = Risk-free rate
  • σd\sigma_d = Downside deviation (standard deviation of negative portfolio returns)

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Sortino Ratio Definition & Formula · PortfolioMetrics