Sharpe Ratio Formula

Sharpe Ratio Formula Explained

Sharpe ratio is excess return divided by risk.

Excess return is the return on the investment (portfolio, fund, trading strategy) less risk-free return (treasury yield, money market rate).

Risk is represented by the standard deviation of returns on the investment.

Therefore, Sharpe ratio equals expected return on the investment less risk-free rate, divided by standard deviation of returns on the investment:

Sharpe ratio formula