Sharpe Ratio Calculator
Print| Excess Return | 0.00% |
| Assessment | - |
When comparing two investment portfolios, looking strictly at total returns can be dangerously misleading. A portfolio that generated a 15% return by taking extreme, volatile risks is far less desirable than a portfolio that generated a 14% return with smooth, predictable stability. To measure how much excess return an investment generates per unit of total risk, financial institutions use the Sharpe Ratio.
Our free Sharpe Ratio Calculator allows investors, fund managers, and CFA analysts to compute risk-adjusted performance. By evaluating returns against standard deviation, you can optimize portfolio asset allocation and identify superior risk-managed strategies.
How to Calculate the Sharpe Ratio
Developed by Nobel laureate William F. Sharpe in 1966, the Sharpe Ratio divides a portfolio’s excess return over the risk-free rate by its total volatility (standard deviation).
The Sharpe Ratio Formula:
Sharpe Ratio = (Portfolio Return - Risk-Free Rate) / Portfolio Standard Deviation
- Portfolio Return (Rᶣ): The total annualized return earned by the investment portfolio.
- Risk-Free Rate (Rᶡ): Yield on benchmark short-term government bonds (e.g., US Treasury bills).
- Portfolio Standard Deviation (σᶣ): The annualized volatility or total risk of the portfolio’s returns.
Sharpe Ratio Benchmark Tiers
| Sharpe Ratio Score | Performance Grading | Financial Interpretation |
|---|---|---|
| Below 1.00 | Subpar / High Volatility | The portfolio generates insufficient excess return to justify its total volatility risk. |
| 1.00 to 1.99 | Good / Acceptable | The portfolio generates adequate excess return per unit of total risk. |
| 2.00 to 2.99 | Very Good / Strong | High risk-adjusted performance; typical for top-tier hedge funds and quantitative strategies. |
| 3.00 or Higher | Excellent / Exceptional | Elite risk-adjusted performance; extremely rare over long multi-year horizons. |
Step-by-Step Portfolio Example
Imagine comparing two investment strategies:
- Strategy A (Tech Growth): Annual Return = 16.0%, Standard Deviation = 18.0%, Risk-Free Rate = 4.0%
- Strategy B (Balanced Index): Annual Return = 12.0%, Standard Deviation = 8.0%, Risk-Free Rate = 4.0%
Strategy A Sharpe Ratio:
Sharpe Ratio = (16.0% - 4.0%) / 18.0% = 12.0% / 18.0% = 0.67
Strategy B Sharpe Ratio:
Sharpe Ratio = (12.0% - 4.0%) / 8.0% = 8.0% / 8.0% = 1.00
Conclusion: Even though Strategy A produced a higher raw return (16% vs 12%), Strategy B is mathematically superior (Sharpe 1.00 vs 0.67) because it generated its returns with far less volatility!
Frequently Asked Questions (FAQ)
What is the difference between Sharpe Ratio and Sortino Ratio?
Sharpe Ratio penalizes both upside and downside volatility equally using standard deviation. Sortino Ratio only penalizes downside volatility (losses), ignoring upside price spikes that benefit investors.
Can the Sharpe Ratio be negative?
Yes. If your portfolio return is lower than the risk-free rate, the Sharpe Ratio will be negative, indicating you would have earned more money holding zero-risk government Treasury bills.
What is a good Sharpe Ratio for a stock portfolio?
A Sharpe Ratio of 1.00 or higher is generally considered good for an equity portfolio. The S&P 500 index historically averages a long-term Sharpe Ratio between 0.40 and 0.50.