The Disposition Effect: Selling Winners Too Early, Holding Losers Too Long

Take a look at a typical retail portfolio that has been built over several years. Often you will find a pattern: the stocks that did well have been sold, sometimes after modest gains, while a collection of stocks bought at much higher prices are still sitting there, deep in the red, waiting to 'come back'. This is so common that it has a name in finance research: the disposition effect.

Understanding the disposition effect matters because it can quietly reshape a portfolio over time, so that it ends up holding the investments the owner was least willing to sell, rather than the ones with the best prospects.

The original research

The term was introduced by Hersh Shefrin and Meir Statman in a 1985 paper in The Journal of Finance titled 'The Disposition to Sell Winners Too Early and Ride Losers Too Long: Theory and Evidence'. They drew on prospect theory, Kahneman and Tversky's description of how people evaluate gains and losses relative to a reference point. If the purchase price is the reference point, then selling a stock that has risen locks in a pleasant gain, while selling a stock that has fallen forces you to accept a painful loss and admit a mistake. Shefrin and Statman argued that this combination, together with regret aversion and mental accounting, pushes people to realise gains quickly and postpone realising losses.

In 1998, Terrance Odean tested the idea using the trading records of thousands of accounts at a US discount brokerage. In a paper titled 'Are Investors Reluctant to Realize Their Losses?', he found that investors were significantly more likely to sell a stock that was up than one that was down. Importantly, he also found that the winners investors sold went on, on average, to do better than the losers they kept. In other words, the pattern was not a clever strategy; it tended to leave investors holding the weaker performers.

Why it feels so natural

• Booking a profit feels like confirmation that you were right, and that feels good immediately.
• Selling at a loss turns a 'paper' loss into a 'real' one, which feels like admitting a mistake.
• Holding a losing stock keeps alive the hope that it will recover, so the regret can be postponed.
• The purchase price acts as an anchor, so 'getting back to breakeven' becomes a goal in itself.

How it shows up for Indian investors

The disposition effect is easy to recognise in everyday language. 'I'll book profits and wait for a dip to re-enter.' 'This stock will come back; it's a good company.' 'I'm not selling at a loss.' It can also show up in mutual funds, where investors redeem funds that have done well to 'lock in gains' while keeping underperforming funds in the hope that they will catch up.

Consider a hypothetical portfolio with two holdings. Stock A was bought at ₹400 and is now ₹520. Stock B was bought at ₹900 and is now ₹550. The investor needs ₹50,000 for an expense and sells Stock A because it is 'in profit'. Nothing in that decision considered which of the two businesses has better prospects from here. The choice was made entirely by comparing each price with its purchase price, and Stock B stays in the portfolio largely because selling it would hurt.

The tax angle

In many tax systems, including India's, capital losses can be set off against certain capital gains, subject to the rules in force at the time, such as restrictions on which kinds of losses can be set off against which kinds of gains and how long losses can be carried forward. That means realising a loss is not always just painful; it can have a practical tax value, while realising gains early can bring tax forward. Tax rules change, so the details should be checked with current official guidance or a qualified tax professional. The broader point is that the disposition effect often runs against what a purely tax-aware approach would suggest.

When selling winners is reasonable

Not every sale of a winner is a mistake. Trimming a position that has grown too large relative to the rest of a portfolio is a disciplined way to manage risk, and rebalancing back to a target allocation inevitably involves selling what has risen. The question is whether a sale is driven by a plan, such as a target allocation or a change in the business, or by the simple pleasure of locking in a gain.

Equally, not every decision to hold a losing position is the disposition effect at work. A company can fall in price for reasons that do not change its long-term prospects, and an investor who has re-examined the business and still finds it attractive may reasonably keep it. The difference lies in the reason. Holding because a fresh analysis supports it is a decision; holding because selling would mean admitting a loss is a feeling.

Practical self-checks

• Apply the same question to every holding: if I held cash instead, would I buy this today at this price? Holdings that fail this test deserve a closer look whether they are up or down.
• Set review triggers in advance. For each holding, write down what would make you sell, such as a change in the business, valuation, or your goal, so that the decision does not depend on whether you are in profit.
• When you need cash, decide what to sell based on your target allocation and the prospects of each holding, not on which ones are in the green.
• Avoid 'breakeven' goals. Getting back to your purchase price is meaningful to you but irrelevant to the market.
• Review your portfolio for the pattern itself. If most of your remaining holdings are at a loss and most of your sales were gains, the disposition effect may be at work.

The takeaway

The disposition effect is one of the best-documented patterns in investor behaviour. It grows out of very human feelings: the pleasure of being right and the pain of admitting a loss. Being aware of it, and judging every holding by its prospects rather than its purchase price, helps make sure that your portfolio reflects your best current judgement rather than your reluctance to feel regret.