What is a simple example of the endowment effect?

You would sell a concert ticket you own for $200 but wouldn’t have paid more than $80 to buy it. Ownership alone inflated its value to you.

What causes the endowment effect?

Mainly loss aversion — giving up something you own feels like a loss, weighed about twice as heavily as an equal gain — plus the way ownership ties an object to your sense of self.

How is the endowment effect different from loss aversion?

Loss aversion is the general rule that losses hurt more than equal gains. The endowment effect is one consequence: because selling feels like a loss, we overvalue what we already own.

Endowment effect

Also known as the divestiture aversion · Decision-making

The endowment effect is the tendency to value something more highly simply because you own it. Once a thing is yours, parting with it feels like a loss — so you demand more to sell it than you would have paid to buy the very same thing.

Why it happens

Loss aversion is the engine: giving up a possession registers as a loss, which weighs about twice as heavily as the pleasure of an equivalent gain. Ownership also folds the object into your sense of self, so selling feels like losing a part of you, not just making a trade.

Examples

In the classic mug experiment, people given a mug demanded roughly twice the price to sell it that others would pay to buy the same mug.
Sellers overpricing their home because it is "theirs," ignoring what buyers will actually pay.
Refusing to cancel a subscription you never use because dropping it feels like giving something up.

How to counter it

Ask the buyer’s question: "If I didn’t already own this, what would I pay for it today?"
Reframe the decision as a fresh choice between the cash and the object, not as a loss.
For investments, judge each holding as if your portfolio were rebuilt from scratch this morning.

The deeper point

It puts a permanent valuation bonus on whatever you already hold — a bonus that has nothing to do with the thing’s actual worth. That’s why decluttering and selling losing investments both feel disproportionately painful: you’re not weighing value, you’re defending ownership.

Frequently asked

What is a simple example of the endowment effect?: You would sell a concert ticket you own for $200 but wouldn’t have paid more than $80 to buy it. Ownership alone inflated its value to you.
What causes the endowment effect?: Mainly loss aversion — giving up something you own feels like a loss, weighed about twice as heavily as an equal gain — plus the way ownership ties an object to your sense of self.
How is the endowment effect different from loss aversion?: Loss aversion is the general rule that losses hurt more than equal gains. The endowment effect is one consequence: because selling feels like a loss, we overvalue what we already own.

Loss aversion Sunk-cost fallacy Status-quo bias The IKEA effect Opportunity cost Margin of safety

Editorial synthesis © ReadGlobe 2026, drawing on Kahneman’s Thinking, Fast and Slow, the Tversky–Kahneman research program, and the primary cognitive-science literature. · Last reviewed 2026-05-29.