Disposition Effect — The Trick You Don't See Coming

Also known as: Disposition Bias

🔥 Hook

An investor sells a stock that has gained 20% to 'lock in profits' while continuing to hold a stock that has lost 30%, hoping it will 'come back,' even though tax considerations an.

🧠 What's Actually Happening?

The disposition effect is the tendency to sell assets that have increased in value (winners) too early while holding onto assets that have decreased in value (losers) too long. Investors are reluctant to realize losses because doing so makes the loss feel real and final, while they are eager to lock in gains to experience the pleasure of a successful trade.

Here's the sneaky part: Loss aversion makes realizing a loss psychologically painful - as long as the losing position is held, the loss remains 'on paper' and feels less real. Selling a winner provides the pleasure of a realized gain, reinforcing the behavior.

📱 Real-Life Scroll

Online: An investor sells a stock that has gained 20% to 'lock in profits' while continuing to hold a stock that has lost 30%, hoping it will 'come back,' even though tax considerations and future prospects may favor the opposite strategy.

Another one

A first-time property investor quickly sells a rental apartment that appreciated by 15% after just one year to 'bank the win,' while holding onto a second property that has lost 25% of its value for three more years, convinced the neighborhood will eventually recover.

IRL: The disposition effect has been documented in stock markets worldwide, real estate markets (homeowners refuse to sell below their purchase price), and even in experimental settings with no real money at stake.

🔍 How to Spot It

Evaluate each position based on its future expected return rather than its purchase price. Ask: 'If I held cash instead, would I buy this asset at its current price?' If not, sell regardless of whether it represents a gain or loss.

✓ Is my brain shortcutting right now?
✓ Would I make the same choice if I started from scratch?
✓ Am I avoiding something uncomfortable by thinking this way?

🎯 Your Challenge

Find one example of disposition effect this week — in your own decisions. Not someone else's. Yours. That's where the real learning happens.

Part of the TellDear Teen Book — criticalthinking.guide