Glossary term
Stop-Loss Order
A stop-loss order is an instruction to sell a security if it reaches a specified stop price, often used to limit losses or enforce a selling rule.
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What Is a Stop-Loss Order?
A stop-loss order is an instruction to sell a security if it reaches a specified stop price, often used to limit losses or enforce a selling rule. Once the stop price is reached, the order typically becomes a market order to sell.
That last detail matters. A stop-loss order can help create discipline, but it does not guarantee the exact exit price. In fast or thin markets, the actual sale price can be lower than the stop price.
Key Takeaways
- A stop-loss order is triggered when a security reaches a specified stop price.
- After triggering, it often becomes a market order.
- It can help enforce sell discipline or limit downside exposure.
- It does not guarantee the stop price as the execution price.
- Stop-loss orders can trigger during temporary volatility or price gaps.
How a Stop-Loss Order Works
An investor chooses a stop price below the current market price for a long position. If the security trades at or below that stop price, the order is activated. The resulting sale is intended to reduce further losses or follow a predefined exit plan.
Stop-loss orders are common in stock trading, but they should be used with an understanding of volatility, bid-ask spreads, and possible price gaps.
Stop-Loss Order Versus Stop-Limit Order
Order type | What happens after trigger |
|---|---|
Stop-loss order | Usually becomes a market order |
Stop-limit order | Becomes a limit order with a minimum acceptable price |
Market order | Seeks immediate execution at available market prices |
Why Investors Use Stop-Loss Orders
Investors may use stop-loss orders to reduce emotional decision-making, protect against large downside moves, or enforce a prewritten sell rule. For traders, the order can be part of risk management. For long-term investors, it can be more complicated because short-term volatility may trigger a sale that conflicts with the long-term thesis.
The order is a tool, not a substitute for deciding why the investment is owned.
Risks and Limits
A stop-loss order can execute during a temporary price drop, market gap, or low-liquidity moment. It can also create tax consequences if it sells a position unexpectedly. Investors should be especially careful using stop-loss orders around earnings announcements, thinly traded securities, and volatile markets.
The Bottom Line
A stop-loss order is a sell instruction triggered by a specified stop price. It can support discipline, but it does not guarantee an exact exit price and can be triggered by volatility that may not change the investment's long-term value.