What is a Stop Loss?
A stop loss is a pre-set instruction to your broker to sell a stock automatically when its price falls to a specific level — your "stop price." It limits your loss on a trade to a defined amount, removing the need to monitor positions constantly.
Example: You buy a stock at ₹500. You set a stop loss at ₹450 (10% below purchase price). If the stock falls to ₹450, your broker automatically sells it — capping your loss at ₹50 per share regardless of further declines.
Types of Stop Loss Orders in India
1. Stop Loss Market (SL-M) Order: When the trigger price is hit, the order executes at the best available market price. Guarantees execution but not the exact price — in fast-moving markets, you may get a worse price (slippage).
2. Stop Loss Limit (SL) Order: When the trigger price is hit, a limit order is placed at your specified limit price. You control the execution price but risk non-execution if the stock gaps past your limit.
3. Trailing Stop Loss: The stop price moves up automatically as the stock rises — maintaining a fixed distance (₹ or %). If the stock goes from ₹500 to ₹600 with a trailing stop of ₹50, the stop moves from ₹450 to ₹550. Protects gains while allowing the stock to run.
How to Place a Stop Loss on NSE/BSE
On most Indian brokers (Zerodha Kite, Groww, Upstox):
- Select your stock → click Sell
- Choose order type: SL or SL-M
- Enter Trigger Price (when the stop activates) and Limit Price (for SL orders)
- For SL: Limit price is slightly below trigger (e.g., Trigger ₹450, Limit ₹448) to ensure execution
How to Determine Stop Loss Levels
Several methods:
- Percentage-based: Set stop at 5–15% below entry. Simple but ignores stock volatility.
- Support level-based: Place stop just below a key support level (previous low, 52-week low). More technical but more meaningful.
- ATR-based (Average True Range): Set stop at 1.5–2× ATR below entry. Accounts for normal volatility — avoids being stopped out by routine price fluctuations.
- Risk-based: Risk no more than 1–2% of your portfolio on any single trade. If risk per share is ₹50 (stop at ₹450 for ₹500 entry), and portfolio is ₹10 lakh with 1% risk = ₹10,000 max loss → buy only 200 shares.
Common Stop Loss Mistakes
- Moving stop loss wider after being triggered: "I'll just wait a bit more" — defeats the purpose entirely
- Placing stop too tight: Normal intraday volatility hits your stop before the trade can work
- Not using stop loss: The most expensive mistake retail traders make. "I'll sell manually" rarely works under emotional pressure
- Assuming stop loss = guaranteed price: Gap-down openings can breach your stop and execute at much lower prices
Stop Loss for Long-Term Investors
Stop losses are primarily for traders. Long-term investors (3–10 year horizon) typically do not use stop losses — a 15% correction in a fundamentally sound company may be a buying opportunity, not a sell signal. For long-term portfolios, the "stop loss" is a fundamental review process — sell when the investment thesis breaks, not when the price dips.