Sharpe Ratio

calender iconUpdated on March 04, 2024
corporate finance and accounting
financial ratios

The Sharpe ratio is a measure of risk-adjusted return for an investment or portfolio. It is named after the American economist William Sharpe. The Sharpe ratio is calculated by dividing the annualized return of an investment or portfolio by its standard deviation.

Formula:

Sharpe Ratio = Annualized Return / Standard Deviation

Interpretation:

  • High Sharpe ratio: Indicates an investment or portfolio that has a high return for a given level of risk.
  • Low Sharpe ratio: Indicates an investment or portfolio that has a low return for a given level of risk.
  • Positive Sharpe ratio: Indicates an investment or portfolio that has a positive return, even after accounting for risk.
  • Negative Sharpe ratio: Indicates an investment or portfolio that has a negative return, even after accounting for risk.

Advantages:

  • Simple to calculate: The Sharpe ratio is easy to calculate, making it a convenient metric for comparing investments or portfolios.
  • Risk-adjusted return: The Sharpe ratio takes into account both the return and risk of an investment or portfolio, making it a more comprehensive measure of performance.
  • Comparable: The Sharpe ratio can be used to compare investments or portfolios across different industries or asset classes.

Disadvantages:

  • Sphericity: The Sharpe ratio does not capture the entire distribution of returns, only the mean and standard deviation.
  • Time horizon: The Sharpe ratio is influenced by the time horizon over which returns are measured.
  • Transaction costs: The Sharpe ratio does not account for transaction costs, which can affect the overall cost of an investment or portfolio.

Applications:

  • Investors and portfolio managers use the Sharpe ratio to evaluate the risk-adjusted performance of investments or portfolios.
  • Researchers use the Sharpe ratio to compare different investment strategies or to develop models for predicting investment returns.

Note:

The Sharpe ratio is a widely used metric in finance, but it should not be the only factor considered when evaluating investments or portfolios. Investors should also consider other factors, such as the investment horizon, the investor’s risk tolerance, and the overall investment strategy.

FAQ's

What is a good Sharpe ratio?

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A Sharpe ratio above 1 is generally considered good, with ratios above 2 being excellent and those below 1 indicating lower risk-adjusted returns.

Is a Sharpe ratio of 0.5 good?

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What does a Sharpe ratio of 1.5 mean?

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Is a Sharpe ratio of 1 good?

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What does a Sharpe ratio of 0.5 mean?

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