What is Sortino Ratio?
Sortino ratio rewards return per unit of harmful volatility — moves below a target return — ignoring upside swings traders generally welcome.
Formula
Sortino ≈ (Return − Target) ÷ Downside deviation
Indian market context (NSE)
Reference levels: Nifty 50 at 24,300, Reliance Industries at ₹1,300, Bank Nifty futures at 55,000 (lot size 30). Examples below show how Sortino Ratio shows up on Indian index, equity, and futures books — update to live quotes in your journal.
Nifty 50 perspective
Apply Sortino Ratio to your Nifty 50 sleeve (spot near 24,300): track the metric on closed index F&O or ETF trades over at least 30 sessions before changing rules. NSE costs and slippage on fast opens often widen the gap between spreadsheet sortino ratio and bank P&L.
Reliance Industries perspective
On Reliance (₹1,300) delivery or intraday trades, calculate sortino ratio with contract-note costs included. Single-name results can look strong on sortino ratio while your Nifty-correlated book tells the opposite — tag “RELIANCE” separately in TradeLyser.
Bank Nifty futures perspective
Bank Nifty futures near 55,000 (lot 30) amplify sortino ratio swings versus cash — one volatile session can move the metric more than a week of Nifty trades. Log margin mode (MIS/NRML) with each entry for honest review.
| Metric | Penalises | Typical user |
|---|---|---|
| Sharpe | All volatility | Balanced books |
| Sortino | Downside only | Positive-skew strategies |
How to validate
- Minimum sample: 30 closed trades on one strategy tag before trusting Sortino Ratio.
- Check for one outlier week inflating Sortino Ratio — export largest winners and losers.
- Recompute Sortino Ratio after including brokerage, STT, and slippage on F&O tags.
- Compare Sortino Ratio on the same date range as profit factor and max drawdown.
How to track in TradeLyser
- Open Strategy Board or analytics → filter by strategy tag and review period.
- Locate the widget or column reporting Sortino Ratio (or export trades to compute manually).
- Store snapshot values in weekly review: Sortino Ratio, profit factor, drawdown, trade count.
- If Sortino Ratio is custom, add a spreadsheet column fed from TradeLyser CSV export.
Best practices
- Publish Sortino Ratio per strategy, not only at account level.
- Use the same calculation window (weekly vs monthly) year-round.
- Pair Sortino Ratio with sample size in every review slide or note.
- Reconcile Sortino Ratio with broker statements before tax filing.
Common pitfalls
- Changing rules after fewer than 20 trades because Sortino Ratio moved slightly.
- Mixing intraday and positional tags when computing Sortino Ratio.
- Ignoring costs so Sortino Ratio looks better than banked P&L.
- Letting one outlier trade dominate the Sortino Ratio reading.
How to use this in TradeLyser
Compute on monthly net returns per strategy tag. Compare Sortino before and after risk-rule changes to see if downside improved.
Related terms
Maximum drawdown records the worst fall from a prior equity high to the subsequent low. It describes pain and capital required to stay in the game — not just the final P&L.
Sharpe ratio measures how much return you earned for each unit of overall volatility. Higher values generally mean smoother growth relative to swings — on a long enough sample.
Volatility quantifies variability — in prices (historical/realised) or in option premiums (implied). Higher volatility means wider expected swings over a horizon.
By trader level
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FAQ
What is a good Sortino ratio?
A Sortino ratio above 1.0 is acceptable, above 2.0 is good, and above 3.0 is excellent. Since Sortino only penalizes downside volatility, ratios tend to be higher than Sharpe ratios for the same strategy. Consistently achieving 2.0+ indicates strong downside risk management.
How do you calculate Sortino ratio?
Sortino ratio equals portfolio return minus risk-free rate, divided by downside deviation. The formula is: (Rp - Rf) / σd, where σd only considers returns below a minimum acceptable return (often 0% or the risk-free rate).
What is the difference between Sortino and Sharpe ratio?
Sharpe ratio penalizes all volatility equally, while Sortino only penalizes downside volatility. If your strategy has large upside swings (which are good), Sharpe will unfairly penalize them. Sortino gives a more accurate picture for asymmetric return distributions.
Why is Sortino ratio better for traders?
Traders want upside volatility—big winning days are good. Sortino ratio recognizes this by only penalizing losses. A day trader with occasional large wins but consistent small losses would have a better Sortino than Sharpe ratio.
What is downside deviation?
Downside deviation is the standard deviation of only negative returns (returns below your target or zero). Unlike standard deviation which treats all volatility equally, downside deviation focuses purely on the volatility that hurts you.
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