Treynor Ratio
Treynor Ratio
A measure of risk-adjusted return calculated as (portfolio return - risk-free rate) / beta. Higher ratios indicate better risk-adjusted performance per unit of systematic risk. Only valid for well-diversified portfolios where beta is the relevant risk measure.
A diversified mutual fund returns 14% with beta of 1.2, while the risk-free rate is 3%. The Treynor ratio is (14% - 3%) / 1.2 = 9.17. This means the fund generates 9.17% of excess return per unit of systematic risk.
Students often confuse Treynor ratio with Sharpe ratio. Treynor uses beta (systematic risk only) in the denominator, while Sharpe uses standard deviation (total risk). Treynor is only appropriate for well-diversified portfolios where unsystematic risk has been eliminated.
How This Is Tested
- Calculating the Treynor ratio given portfolio return, risk-free rate, and beta
- Comparing diversified portfolios using Treynor ratios to identify superior risk-adjusted performance
- Distinguishing when to use Treynor (beta/systematic risk) versus Sharpe (standard deviation/total risk)
- Understanding that higher Treynor ratios indicate more efficient use of systematic risk
- Recognizing that Treynor is appropriate for evaluating portfolio managers who manage diversified portfolios
Calculation Example
Treynor Ratio = (Portfolio Return - Risk-Free Rate) / Beta - Identify the portfolio return: 16%
- Identify the risk-free rate: 4%
- Identify the beta: 1.3
- Calculate excess return: 16% - 4% = 12%
- Divide excess return by beta: 12% / 1.3 = 9.23
Regulatory Limits
| Description | Limit | Notes |
|---|---|---|
| Higher is better | No specific threshold | Like Sharpe ratio, higher Treynor ratios indicate superior risk-adjusted returns |
| Valid for diversified portfolios only | Beta is relevant risk measure | Treynor assumes unsystematic risk has been diversified away; inappropriate for concentrated portfolios |
Example Exam Questions
Test your understanding with these practice questions. Select an answer to see the explanation.
Katherine, a pension fund manager, is evaluating three well-diversified equity mutual funds for potential inclusion in her portfolio. Fund A has returned 15% with beta of 1.4, Fund B has returned 11% with beta of 0.9, and Fund C has returned 13% with beta of 1.1. The risk-free rate is 3%. Katherine wants to select the fund that provides the best risk-adjusted return per unit of systematic risk. Which fund should she choose?
C is correct. Fund C has the highest Treynor ratio: (13% - 3%) / 1.1 = 10% / 1.1 = 9.09. This indicates Fund C generates the most excess return per unit of systematic risk (beta), making it the most efficient choice for a diversified portfolio.
Fund A has Treynor ratio of (15% - 3%) / 1.4 = 12% / 1.4 = 8.57. While Fund A has the highest absolute return (15%) and highest excess return (12%), it requires significantly more systematic risk (beta 1.4) to achieve those returns, making it less efficient. Fund B has Treynor ratio of (11% - 3%) / 0.9 = 8% / 0.9 = 8.89. Option B incorrectly calculates Fund B's ratio. Fund C provides superior bang-for-your-beta-buck.
The Series 65 exam tests your ability to evaluate diversified portfolio performance using the Treynor ratio. Understanding that higher absolute returns do not always translate to better risk-adjusted performance is critical for making appropriate recommendations for institutional portfolios and diversified mutual funds where systematic risk (beta) is the primary concern.
Which of the following correctly identifies the components used in calculating the Treynor ratio?
B is correct. The Treynor ratio is calculated as (Portfolio Return - Risk-Free Rate) / Beta. It measures excess return per unit of systematic risk (beta). Beta represents the sensitivity to market movements and captures only non-diversifiable risk.
A describes the components of the Sharpe ratio, not the Treynor ratio. The key distinction is that Sharpe uses standard deviation (total risk) while Treynor uses beta (systematic risk only). C describes elements related to alpha calculation and CAPM analysis. D includes correlation and benchmark return, which are not direct inputs to the Treynor ratio formula.
The Series 65 exam frequently tests your knowledge of performance measurement formulas and their components. Confusing Treynor ratio components with those of the Sharpe ratio is one of the most common errors. Knowing that Treynor uses beta (systematic risk) is essential for understanding when each metric is appropriate: Treynor for diversified portfolios, Sharpe for any portfolio including concentrated ones.
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Access Free BetaA diversified equity fund has an annual return of 18%, a beta of 1.5, and the current risk-free rate is 3%. What is the fund's Treynor ratio?
B is correct. Calculate: Treynor Ratio = (18% - 3%) / 1.5 = 15% / 1.5 = 10.00. This means the fund generates 10% of excess return for each unit of systematic risk (beta) taken.
A (5.00) incorrectly uses a different calculation, possibly dividing 15% by 3 (the risk-free rate) instead of by beta. C (12.00) incorrectly uses 18% / 1.5 without subtracting the risk-free rate first, which is a common error. D (15.00) represents only the excess return (18% - 3%) but fails to complete the division by beta, confusing excess return with the Treynor ratio itself.
Treynor ratio calculations appear regularly on the Series 65 exam. The most common mistake is forgetting to subtract the risk-free rate from the portfolio return before dividing by beta. Understanding this two-step process (calculate excess return over risk-free rate, then divide by systematic risk measure) is essential for evaluating how efficiently portfolio managers use market risk to generate returns.
All of the following statements about the Treynor ratio are accurate EXCEPT
C is correct (the EXCEPT answer). The Treynor ratio uses beta (systematic risk) in the denominator, NOT standard deviation (total risk). This is the key distinction between Treynor and Sharpe ratios. The Sharpe ratio uses standard deviation to measure total risk, while Treynor focuses only on systematic (market) risk measured by beta.
A is accurate: Higher Treynor ratios indicate more excess return generated per unit of systematic risk, signaling superior risk-adjusted performance for diversified portfolios. B is accurate: Treynor is most appropriate for well-diversified portfolios because it assumes unsystematic risk has been eliminated through diversification, leaving only systematic (beta) risk as relevant. D is accurate: The numerator (Return - Risk-Free Rate) measures excess return above the risk-free rate, just like the Sharpe ratio.
The Series 65 exam tests your ability to distinguish between Treynor and Sharpe ratios. Understanding that Treynor uses beta (systematic risk only) while Sharpe uses standard deviation (total risk) is critical for selecting the appropriate performance metric. Treynor is ideal for evaluating diversified mutual funds and institutional portfolios, while Sharpe is better for any portfolio, including concentrated positions.
An investment adviser is comparing two diversified mutual funds. Fund X has a 14% return, beta of 1.2, and Treynor ratio of 8.33. Fund Y has a 10% return, beta of 0.8, and the risk-free rate is 4%. Which of the following statements are accurate?
1. Fund Y has a Treynor ratio of 7.50
2. Fund X provides better risk-adjusted returns per unit of systematic risk than Fund Y
3. Both funds would be inappropriate to evaluate using Treynor ratio if they held concentrated positions
4. Fund Y has lower systematic risk than Fund X
D is correct. All four statements (1, 2, 3, and 4) are accurate.
Statement 1 is TRUE: Fund Y's Treynor ratio = (10% - 4%) / 0.8 = 6% / 0.8 = 7.50.
Statement 2 is TRUE: Fund X has a Treynor ratio of 8.33 compared to Fund Y's 7.50, indicating Fund X provides better risk-adjusted returns per unit of systematic risk (8.33% of excess return per beta unit versus 7.50%).
Statement 3 is TRUE: The Treynor ratio assumes portfolios are well-diversified, meaning unsystematic (company-specific) risk has been eliminated. If either fund held concentrated positions, beta alone would not capture total risk, and the Sharpe ratio (using standard deviation) would be more appropriate for evaluation.
Statement 4 is TRUE: Fund Y has a beta of 0.8 (meaning 80% of market volatility) while Fund X has beta of 1.2 (120% of market volatility). Lower beta indicates lower systematic (market) risk, making Fund Y more defensive than Fund X.
The Series 65 exam tests comprehensive understanding of the Treynor ratio, including calculation, interpretation, comparison, and limitations. Recognizing that Treynor is only valid for well-diversified portfolios demonstrates advanced knowledge of when to use beta-based versus standard deviation-based risk metrics. This distinction is essential for proper portfolio evaluation and manager selection.
💡 Memory Aid
Think "Treynor = T-rex bites Beta" (uses systematic risk). "Sharpe = Sharp shooter spread" (uses standard deviation = total risk). Higher Treynor = better bang-for-beta-buck. Only use Treynor for well-diversified portfolios where beta matters most.
Related Concepts
This term is part of this cluster:
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Where This Appears on the Exam
This term is tested in the following Series 65 exam topics:
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