Risk-Adjusted Return Calculator

What Is Risk-Adjusted Return?

Risk-adjusted return measures how much return you earned relative to the risk you took. Two investments can both return 10% — but if one required twice the volatility (risk) to achieve it, the lower-risk one produced a superior risk-adjusted return. Simply comparing raw returns without accounting for risk is like comparing two drivers' lap times without noting that one drove in the rain.

The most common metric: the Sharpe Ratio = (Portfolio Return - Risk-Free Rate) ÷ Standard Deviation of Returns. A 10% portfolio return with 15% standard deviation and a 4.5% risk-free rate: (10% - 4.5%) ÷ 15% = 0.37 Sharpe. A different portfolio returning 8% with 8% standard deviation: (8% - 4.5%) ÷ 8% = 0.44 Sharpe. The 8% portfolio is actually better on a risk-adjusted basis — more return per unit of risk taken.

Sharpe ratio benchmarks: below 0.5 = poor (risk is not being compensated adequately). 0.5-1.0 = acceptable. 1.0-2.0 = excellent. Above 2.0 = exceptional (very rare over long periods). The S&P 500's historical Sharpe ratio is approximately 0.4-0.6 over most 10-year periods.

Key Risk-Adjusted Metrics Explained

Sharpe Ratio: Uses total volatility (standard deviation) as the risk measure. Best for evaluating your entire portfolio. Limitation: penalizes upside volatility equally with downside — a stock that goes up a lot is "risky" by this measure, which feels counterintuitive.

Sortino Ratio: Like Sharpe but uses only downside deviation — only penalizing negative volatility. This better reflects investor preferences since upside volatility (big gains) is welcome. A Sortino of 1.5 is strong; above 2.0 is excellent. More useful than Sharpe for evaluating strategies with asymmetric return profiles (options, concentrated positions).

Treynor Ratio: Uses beta (market sensitivity) instead of standard deviation. Measures return per unit of systematic risk. Useful for evaluating mutual funds and ETFs within a diversified portfolio where unsystematic risk is diversified away.

Alpha (Jensen's Alpha): The return above what would be expected given the portfolio's beta (market risk). Positive alpha means the portfolio outperformed its risk-adjusted benchmark. A fund with 12% return, beta of 1.1, and an 10% market return: expected return = 4.5% + 1.1 × (10% - 4.5%) = 10.55%. Alpha = 12% - 10.55% = +1.45%. This fund added value beyond what its market exposure would predict.

Applying Risk-Adjusted Thinking to Your Portfolio

Fund comparison: When choosing between similar funds, compare Sharpe ratios over 3-5 year periods instead of raw returns. A fund returning 9% with a 0.7 Sharpe is genuinely better than one returning 11% with a 0.4 Sharpe — the second fund took disproportionate risk to earn the extra 2%.

Asset allocation decisions: Adding bonds to an all-stock portfolio typically reduces raw return but can improve the Sharpe ratio — because volatility drops more than return decreases. A 80/20 stock/bond portfolio often has a higher Sharpe than 100% stocks, meaning the risk-adjusted return is better even though the raw return is lower.

The maximum drawdown perspective: Beyond ratios, consider the worst-case scenario. A portfolio returning 10%/year on average but dropping 50% in the worst year may be less suitable than one returning 7%/year with a worst drawdown of 20% — depending on your ability to stay invested during the crash. Most investors abandon high-volatility strategies at the worst time, destroying the theoretical return advantage.

Frequently Asked Questions