A trailing stop is an automated exit strategy that protects your investment gains while allowing upside participation. Unlike a fixed stop-loss order, a trailing stop follows your investment upward, creating a moving floor below which you automatically sell. If your position rises from $100 to $150, and you've set a 10% trailing stop, your exit trigger moves from $90 to $135. If the price drops to $135, you're out. If it climbs to $200, your stop trails to $180.
How It Works
You set a trailing stop as either a percentage or fixed dollar amount below the highest price your investment reaches. As the price climbs, the stop automatically adjusts upward but never moves down. This creates an asymmetrical risk profile: unlimited upside capture with predetermined downside protection. The moment the price falls to your trailing stop level, a sell order executes automatically.
For example, if you buy at $50 with a 15% trailing stop, your initial exit is $42.50. When the stock hits $80, your stop moves to $68. When it reaches $100, your stop is at $85. If volatility causes a pullback to $85, you sell and preserve 70% gains. If the stock continues to $150, your stop trails to $127.50.
Why It Matters for Investors
Angel investors often face highly volatile early-stage investments with significant upside potential but concentrated risk. A trailing stop removes emotion from selling decisions and prevents the common mistake of watching gains evaporate completely during pullbacks. It's particularly valuable when you cannot actively monitor positions daily or when market conditions are choppy.
For secondary market shares in mature startups or public equity positions, trailing stops enforce disciplined portfolio management. They're especially relevant for investors with concentrated positions who want upside exposure without unlimited downside risk.
Example
You purchase secondary shares in a growth-stage company at $25 per share with a 20% trailing stop. The stock rallies to $60 within six months, moving your stop to $48. During a market correction, the stock drops to $48.50, and your shares sell automatically at approximately $48. You've captured 92% gains while protecting against further decline. Without the trailing stop, you might have watched the stock drop to $30, converting a strong win into a moderate one.
Key Takeaways
- Trailing stops follow price upward but never downward, locking in gains at predetermined levels
- Set them as percentages (15-25% are common) or dollar amounts based on your volatility expectations
- They eliminate emotion from exit decisions and work well for investors who can't monitor positions constantly
- Most brokers offer trailing stops for publicly traded securities, though availability varies for secondary shares and private investments