Stop-Loss Order

FundamentalStock Market2 min read

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:

  1. You own stock at $50, want to limit loss to 10%
  2. Set stop-loss at $45
  3. If price drops to $45, order triggers
  4. Becomes a market order and sells

Types of Stop Orders:

TypeTriggersExecutes As
Stop-LossAt stop priceMarket order
Stop-LimitAt stop priceLimit order
Trailing Stop% or $ from highMarket 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:

  1. Don't set stops at obvious round numbers
  2. Give stops enough room to avoid whipsaws
  3. Consider using stop-limit orders in illiquid stocks
  4. Adjust stops as position becomes profitable