Treynor vs Sharpe — When Each Applies

The Treynor Ratio measures excess return per unit of systematic (market) risk (beta), while the Sharpe Ratio measures excess return per unit of total risk (standard deviation). Choosing between them depends on whether the fund is one slice of a diversified portfolio or your only holding.

Worked INR example

A large-cap fund: return 14%, risk-free 6.5%, beta 0.9, SD 16%. Sharpe = (14−6.5)/16 = 0.47. Treynor = (14−6.5)/0.9 = 8.33. Compare to NIFTY 50 ETF: return 12%, beta 1.0, SD 17%. Sharpe = 0.32, Treynor = 5.5. The fund beats the benchmark on both. For an investor who also holds international + debt, Treynor is the cleaner comparison; for a single-fund investor, Sharpe matters more.

When to use

• Treynor: ranking equity funds inside a diversified multi-fund portfolio
• Sharpe: ranking standalone investments where idiosyncratic risk hurts
• Reject either if beta is unstable (e.g., sector funds, small-caps) — use Sortino instead

SEBI caveat

SEBI riskometer is not a ratio — it is a category-level risk label. Treynor / Sharpe require 3+ years of monthly returns to be statistically meaningful. Always compare funds against same-category peers, not absolute thresholds.

Related terms: Treynor Ratio, Sharpe Ratio, Beta.