The Endowment Effect: Why We Overvalue What We Own

The Endowment Effect: Why We Overvalue What We Own Have you ever tried to sell something you own and felt that no buyer was offering a fair price? You are not alone. This phenomenon is called the endowment effect, and it shapes our financial decisions more than we realize. What Is the Endowment Effect? The endowment effect is a cognitive bias where people assign higher value to things simply because they own them. A classic experiment by Daniel Kahneman and colleagues demonstrated this perfectly. Participants given a coffee mug demanded roughly twice the price that buyers were willing to pay. The mug had not changed -- only the sense of ownership had. This bias extends far beyond coffee mugs. It influences how we price our homes, negotiate salaries, and even hold onto underperforming investments. Once something is "ours," letting go feels like a loss rather than a neutral transaction. Why Does This Happen? Three psychological mechanisms drive the endowment effect: Loss aversion is the