Definition
Disposition Effect
The disposition effect is the tendency to sell winning investments too early to bank a gain, while holding on to losing investments too long to avoid realising a loss.
Driven by loss aversion and mental accounting, this behaviour systematically hurts returns: it trims the very holdings that are working and lets losers drag on a portfolio. In India it is amplified by tax confusion — investors sometimes sell winners just before long-term status to 'be safe', or refuse to exit a dud because doing so 'makes the loss real'.
Ironically, tax logic often runs the opposite way: harvesting a loss can offset capital gains, while selling a winner can trigger tax. A disciplined process — rebalancing to target weights and judging each holding on its forward prospects rather than your entry price — directly counteracts the disposition effect.
Related terms
- Loss AversionLoss aversion is the well-documented tendency for the pain of a loss to feel roughly twice as powerful as the pleasure of an equivalent gain.
- Mental AccountingMental accounting is the tendency to treat money differently depending on its source or label, instead of recognising that all money is fungible.
- Tax-Loss HarvestingTax-loss harvesting is the practice of selling investments at a loss to offset taxable capital gains, reducing the overall tax bill while staying invested in a similar position.
Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.