Sharpe ratio and what it means for your risk-adjusted returns

Subscribe to enjoy similar stories. When investing, the allure of stellar returns often becomes the primary driver of decision-making. As investors celebrate a mutual fund scheme that delivers a 15% annual return, only a few stop to ask: at what cost? At a time when financial markets are turbulent, you need to weigh risks and returns.

To understand whether your MF investment is truly performing well or is simply a risky bet delivering dazzling returns, you need a tool that zooms in on the scheme's risk and reward. This is where the Sharpe ratio comes in handy. Let us understand the tool and how it helps calculate your returns.

Developed by Nobel laureate William F. Sharpe, the ratio is a tool that measures risk-adjusted returns. Instead of just looking at the final percentage of growth, it examines how much "excess return" an investor receives for the extra risk they take on.

"Simply put, the Sharpe ratio means how much the scheme has generated extra returns compared to the risk taken," explains Pankaj Mathpal, founder and managing director of Optima Money Managers Pvt. Ltd. "When you want to generate extra returns, it means taking extra risk.

And depending on the extra risk taken, you need to get that extra return. If the risk taken is 2% and the return is 1% extra, it does not make sense. The returns in the proportion of the risk should be higher," he adds.

To arrive at this number, analysts subtract the "risk-free rate", which is usually the return on a stable index like the Nifty 50 for equity or government treasury bills for debt, from the fund's total return. This result, known as the 'alpha,' is then divided by the fund’s standard deviation, which represents its volatility. "For this, one needs to see how much