Sharpe ratio –

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The measurement of an investment’s excess return per each unit of additional risk (as measured by standard deviation), compared to a risk-free asset. Sharpe Ratio indicates whether portfolio returns are due to smart investing or excess risk. In other words, the higher the Sharpe Ratio, the better the risk-adjusted return, calculated as:

S = (return of the portfolio  the return of the risk-free asset) standard deviation of the portfolio

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