Why We Sell Winners Early and How to Stop Holding Losers

Imagine you own shares in two companies. One is comfortably in profit; the other is down. You don’t need the money right now, but you’re tidying up your portfolio. Which stock do you sell? If you feel a pull to take the profit on the winner and give the loser more time, you are not alone. Most investors feel exactly that.

Researchers Hersh Shefrin and Meir Statman named this pattern the disposition effect in 1985. A landmark study of 10,000 brokerage accounts then offered a striking proof: over most of the year, a stock that was up was nearly 60% more likely to be sold than a stock that was down. The habit of selling winners too early and holding losers too long has since been found in many markets and among many kinds of investors.

A bias with real costs

The disposition effect isn’t just a curiosity. It has been linked to weaker trading performance. And it doesn’t only affect people who trade from a phone between meetings. The effect has been documented among mutual fund managers, futures traders, and institutional investors too. One analysis of active mutual funds found that funds prone to the effect trailed less-disposed funds by 4–6% a year, and were less likely to still be around five years later.

Here’s the uncomfortable part: the behavior often runs against what the evidence suggests is rational. In markets where recent winners tend to keep performing, a more sensible approach would often be to let winners run and cut losers early. Instead, investors often do the reverse — selling a rising stock because locking in a gain feels good, and holding a falling stock because selling feels like admitting defeat.

Why our brains play this trick

The psychology behind the disposition effect is rooted in loss aversion, one of the most studied ideas in behavioral finance. Losses tend to hurt roughly twice as much as equivalent gains feel pleasant. That asymmetry makes a realized loss especially painful: once you sell, the loss is no longer a hopeful “paper loss” on a screen. It becomes real.

Winners are different. Selling a winner delivers a small burst of pride and relief. There is also an internal trap sometimes called “get-evenitis” — the strong desire to wait until a losing stock gets back to the price you paid, so you can break even and avoid regret. Add mental accounting, where we track each purchase like a separate scorecard, and you have a recipe for letting the past price overshadow the question that actually matters: what is this stock likely to do from here?

Losses can make the pattern worse

One would hope that losing money would teach caution. New research suggests the opposite can happen. In a study of nearly 190,000 Chinese retail investors and more than 40 million trades, significant past losses were associated with a disposition effect about 10% stronger, while significant past gains reduced it by a similar amount. That creates a quiet downward spiral: an investor who has lost money may become more likely to sell winners early and cling to losers, repeating the very behavior that contributed to the losses. The study is a working paper and hasn’t yet been through formal peer review, but its findings echo a wider theme in behavioral finance — experience alone doesn’t always cure bias.

What research says can help

One surprisingly simple factor is how prominently the purchase price is displayed. In a laboratory trading experiment, investors who used software that showed their original purchase price displayed a clear disposition effect. When the same information was removed entirely, the effect shrank by about 25%. Without the purchase price in the foreground, the question shifts from “am I up or down on this one?” to “is this still a good investment?” For many decisions, the purchase price is history that should matter far less than what happens next.

Pre-committed rules appear to help more than good intentions. Studies have found that binding orders — such as a stop-loss or a pre-set profit target — reduce the tendency to hold losers and sell winners early. What didn’t work? Simply reminding people of their intended selling plan. The binding commitment mattered more than the reminder.

Another promising idea uses our social instincts. Researchers at Monash Business School trained people to make investment decisions as though they were advising a client rather than trading for themselves. Acting for someone else made decisions more procedural and easier to explain — and reduced the disposition effect for participants who were skilled at taking another person’s perspective. It’s as if the imaginary client helps distance you from the emotional pull of your own purchase price.

A pattern, not a life sentence

None of this means investors can be perfectly rational, or that any strategy will eliminate the bias in every situation. The disposition effect remains even when the purchase price is hidden, and even professionals continue to show traces of it. Tax rules and market conditions also shift behavior — in some countries, investors sell more losers in December for tax reasons, temporarily reversing the pattern. This is a human reflex shaped by loss aversion, pride, regret, and mental accounting. It is not a sign of weak character.

The practical lesson is gentler than it sounds. Because the bias is triggered by context and emotion, changing the context can help. Make the purchase price less prominent. Set your exit rules when you are calm rather than anxious. Ask what you would advise a friend to do with this same holding. You may still feel the pull to book a small win and wait for a losing stock to recover. But by naming the pattern, you give yourself a fighting chance to choose the better question — not “what did I pay?” but “what do I expect next?”