Stop-Loss Order
Quick Definition
An order to sell a security when it reaches a certain price, designed to limit an investor's loss on a position.
What Is Stop-Loss Order?
A Stop-Loss Order automatically sells (or buys to cover) a security when it reaches a specified price, helping investors limit potential losses or protect profits.
How Stop-Loss Orders Work:
- You own stock at $50, want to limit loss to 10%
- Set stop-loss at $45
- If price drops to $45, order triggers
- Becomes a market order and sells
Types of Stop Orders:
| Type | Triggers | Executes As |
|---|---|---|
| Stop-Loss | At stop price | Market order |
| Stop-Limit | At stop price | Limit order |
| Trailing Stop | % or $ from high | Market order |
Example - Trailing Stop:
- Buy stock at $100
- Set 10% trailing stop
- Stock rises to $120 → Stop adjusts to $108
- Stock drops to $108 → Triggers sell
Setting Stop-Loss Levels:
- Percentage-Based: 5-10% below purchase price
- Support-Based: Just below key support levels
- Volatility-Based: Based on ATR (Average True Range)
- Moving Average: Below 50-day or 200-day MA
Advantages:
- Automatic risk management
- Removes emotional decision-making
- Protects profits on winning positions
- Limits maximum loss
Disadvantages:
- Can be triggered by temporary dips (whipsaws)
- Stop-loss becomes market order (slippage risk)
- Doesn't protect against gap downs
- May lock in losses during volatility
Best Practices:
- Don't set stops at obvious round numbers
- Give stops enough room to avoid whipsaws
- Consider using stop-limit orders in illiquid stocks
- Adjust stops as position becomes profitable
Related Terms
Market Order
An order to buy or sell a security immediately at the best available current price.
Limit Order
An order to buy or sell a security at a specific price or better, giving you price control but no execution guarantee.
Risk Management
The systematic process of identifying, assessing, and mitigating financial risks to protect portfolio value and achieve investment objectives.
Volatility
A measure of how much and how quickly an asset's price fluctuates, indicating the degree of risk and uncertainty.
Stock
A security representing ownership in a corporation, entitling the holder to a share of profits and voting rights.
Initial Public Offering (IPO)
The first sale of a company's stock to the public, transitioning it from private to publicly traded.
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