bias library
Disposition effect
You close winners too early and hold losers too long.
Shefrin and Statman documented it in 1985. It is the practical consequence of loss aversion: you cut gains short to lock the win, and let losses run hoping for recovery. Your asymmetric pattern collides with markets that demand the opposite.
What it looks like in crypto
- ●Your longest-held coin is your worst-performing one. The math: anything still in the portfolio after years either compounded into a winner (rare) or is too painful to close (common).
- ●You sell ETH at +8% but hold the alt down 40% "until it recovers". The eight-percent win felt urgent; the forty-percent loss feels deferrable.
- ●When you need cash to enter a new trade, you sell the green position — even when its thesis is intact and the red one's thesis is broken.
- ●Your reasoning shifts to defend the position rather than evaluate it. Sunk-cost meets ego.
Counter-moves
- Stop deciding by how the position feels today. Decide by what the next 12 months look like for the thesis.
- Use a trailing stop on winners so the decision to exit is mechanical, not emotional.
- Once a month, ask of every loser: would I open this position right now, at today's price, with cash? If the answer is no, close it.
- Track and read your own disposition rate: average hold time on winners versus losers. The gap is the pattern made visible.
Worth knowing
The disposition effect is the most expensive single bias in retail trading because it inverts the right action on both sides of the P&L. Most traders never measure their hold-time gap, so the pattern stays invisible — and intact.
Academic foundation
Shefrin & Statman (1985). The Disposition to Sell Winners Too Early and Ride Losers Too Long. Journal of Finance, 40(3), 777–790.
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