Sortino Ratio

Like the Sharpe ratio, but only penalises downside volatility. Doesn't punish a strategy for being volatile to the UPSIDE.

Sortino Ratio — Like the Sharpe ratio, but only penalises downside volatility. Doesn't punish a strategy for being volatile to the UPSIDE.

Key facts

Category
Risk
Definition
Like the Sharpe ratio, but only penalises downside volatility. Doesn't punish a strategy for being volatile to the UPSIDE.
Formula
Sortino = (Return - Risk-Free Rate) / Downside Deviation
Live example
/research/stock/QQQ
Last updated
2026-06-17

Formula

Sortino = (Return - Risk-Free Rate) / Downside Deviation

How IndexAlpha uses Sortino Ratio

Surfaced alongside Sharpe on the Risk card. Often more flattering than Sharpe for strategies with positive skew (occasional big winners).

See it live

The Sortino Ratio metric shows up on every IndexAlpha research page. See it now on QQQ — or research any stock to view its Sortino Ratio.

Related terms

Common questions

What is Sortino Ratio?

Like the Sharpe ratio, but only penalises downside volatility. Doesn't punish a strategy for being volatile to the UPSIDE.

How is Sortino Ratio calculated?

Sortino = (Return - Risk-Free Rate) / Downside Deviation

How does IndexAlpha use Sortino Ratio?

Surfaced alongside Sharpe on the Risk card. Often more flattering than Sharpe for strategies with positive skew (occasional big winners).

Sources