Investing Sharpe ratio risk-adjusted return

Sharpe ratio in mutual fund performance

From WebNotes, a public knowledge base. Last updated . Reading time ~6 min.

The Sharpe ratio is a widely-used measure of risk-adjusted return that computes excess return per unit of total volatility. Developed by Nobel laureate William Sharpe, it remains one of the most-cited performance metrics in mutual fund evaluation.

For Indian retail investors comparing mutual fund schemes, Sharpe ratio enables apples-to-apples comparison of risk-return profiles across different schemes.

Formula

Sharpe ratio = (Scheme return - Risk-free return) / Standard deviation of scheme returns

Where:

  • Scheme return: Annualised return of the mutual fund scheme.
  • Risk-free return: Typically the 10-year G-Sec yield or 91-day T-bill rate (typically 6-7% in current Indian markets).
  • Standard deviation: Annualised volatility of scheme returns.

Interpretation

Sharpe ratioInterpretation
> 2Excellent risk-adjusted return
1 to 2Good risk-adjusted return
0 to 1Acceptable but unimpressive
< 0Underperformed risk-free rate

For mutual funds in India:

  • Equity funds: Sharpe of 1-1.5 is typical for good performance.
  • Hybrid funds: Sharpe of 0.8-1.2 typical.
  • Debt funds: Sharpe of 0.5-1.5 depending on category.

Comparison with Sortino ratio

The Sharpe ratio uses total volatility (both upside and downside). The Sortino ratio uses only downside deviation:

  • Sharpe: Penalises all volatility (including good upside).
  • Sortino: Penalises only downside volatility.

For most investors, Sortino is more intuitive (only downside is “risk”). However, Sharpe remains the industry standard.

Limitations

  • Assumes normal distribution: Real returns have fat tails.
  • Doesn’t capture tail risk: Black-swan events under-weighted.
  • Period-dependent: Sharpe can vary significantly with the measurement window.
  • Doesn’t capture sequence risk: Order of returns matters in real investing.

Use in mutual fund evaluation

Compare Sharpe ratios across:

  • Same-category schemes.
  • Similar measurement period (e.g., 3-year or 5-year).
  • Net of TER (post-fee Sharpe).

Avoid comparing across categories with materially different volatility profiles.

See also

External references

References

  1. Sharpe, William F. “Mutual fund performance” 1966.
  2. CFA Institute curriculum.

Related articles

Reviewed and published by

WebNotes Editorial Team

The WebNotes Editorial Team covers Indian capital markets, payments infrastructure and retail investor procedures. Every article is fact-checked against primary sources, principally SEBI circulars and master directions, NPCI specifications and the official support documentation published by the intermediary in question. Drafts go through a second-pair-of-eyes review and a separate compliance read before publication, and revisions are tracked against the SEBI and NPCI rule changes referenced in the methodology section.

Last reviewed
Conflicts of interest
WebNotes is independent. No relationship with any broker, registrar or bank named in this article.