In a famous experiment, half a room was given a coffee mug and asked the lowest price they would sell it for; the other half was asked the most they would pay to buy the same mug. The sellers wanted about twice what the buyers would offer. The mug had not changed. Only who owned it had. That gap has a name, and it lives in every portfolio.
Someone offers you ₹200 for the old mug on your desk and you refuse — yet you would never have walked into a shop and paid ₹200 for it. Nothing about the mug justifies ₹200; the only thing making it feel worth that is that it is already yours.
The stock in your demat is the mug. You will not sell it at today’s price, but you would never buy it at today’s price either. The price you defend is set by ownership, not by the business.
How it sets your portfolio
The endowment effect is why the hardest holdings to sell are the ones you did not choose or have held longest — an inheritance, employer stock, a decade-old position. You would not put a fresh rupee into any of them at today’s price, which is the market telling you they no longer belong in the portfolio. But selling feels like surrendering something that is yours, so they sit there, unexamined, crowding out better ideas.
You inherited shares you would never buy at today’s price, yet you cannot bring yourself to sell them. What is most likely at work?
Experiment: aadhe logon ko mug diya, poocha bechne ka daam — doosron se poocha khareedne ka. Bechne wale doguna maang rahe the, mug wahi tha, bas maalik badal gaya. Endowment effect: jo aapka hai use aap zyada value dete ho — loss aversion ki wajah se, chhodna loss jaisa lagta hai. Isiliye woh stock bechna mushkil jise aaj us price pe kabhi khareedoge nahi — inherited, employer, purani holding. Ek sawaal sab kaat deta hai: "agar aaj cash hota, kya main yeh is price pe khareedta?" Jawab "nahi" hai toh sirf ownership rok rahi hai, thesis nahi.
- The endowment effect makes you value something more just because you own it.
- It grows from loss aversion — selling feels like a loss, which hurts more than a gain.
- It shows up as holdings you would never buy today but will not sell either.
- Inherited, employer and long-held positions are where it bites hardest.
- Cut through it by asking "would I buy this at this price today?" and acting on an honest no.
Mark it done to track your progress through the curriculum.
Common questions
Short, direct answers to what people ask about this topic.
- what is the endowment effect
- The endowment effect is the tendency to value something more simply because you own it. In the classic experiment, people given a mug demanded roughly twice as much to sell it as an identical group was willing to pay to buy one — nothing about the mug changed except who possessed it. It stems largely from loss aversion: parting with something you own feels like a loss, and losses loom larger than equivalent gains, so ownership inflates the price you attach to a thing.
- endowment effect in investing example
- The clearest example is holding a stock you would never buy today at its current price. An inherited holding, an employer’s shares, or a position you have owned for years all feel worth keeping in a way an identical stock you did not own would not — you would not put fresh money into it, yet you will not sell it either. That asymmetry, where holding feels different from buying, is the endowment effect quietly setting your portfolio.
- why is it so hard to sell a stock i own
- Because ownership itself changes how you value the stock: selling feels like giving up something that is already yours, which loss aversion makes painful, and any gain from redeploying the money feels smaller than that pain. You also anchor on your purchase price and on the story that made you buy, both of which the mere fact of owning reinforces. The discomfort is real but it is about ownership, not about the stock’s prospects — which is exactly why it misleads.
- how to overcome the endowment effect
- Ask the ownership-neutral question: "If I did not own this today, would I buy it now at this price?" If the honest answer is no, the only reason you are holding is that you already own it — which is the endowment effect, not analysis. Reframing a hold as an active decision to re-buy at the current price each day strips away the ownership premium and forces you to judge the stock on its merits, the same way you would judge one you had never held.