Losses Hurt More, and More Choice Can Be Harder: Loss Aversion, the Endowment Effect, Choice Overload and the Peak-End Rule
Losing ten dollars feels bigger than gaining ten. Here is what research says about loss aversion, the endowment effect, choice overload and the peak-end rule — including where the findings are weaker than their reputation.
Last reviewed 2026-09-29
We feel changes, not totals
In 1979 Daniel Kahneman and Amos Tversky published prospect theory. Its core idea is simple: people judge value not by the total they end up with but by how much it went up or down from a reference point — and they feel the downs much more strongly.
This article covers four effects that branch from that idea: loss aversion, our sensitivity to losing; the endowment effect, where things become more precious once they are ours; choice overload, where more options make choosing harder; and the peak-end rule, where we remember an experience by its high point and its ending rather than its whole.
Loss aversion: losing ten feels bigger than gaining ten
Offered a coin toss — heads you win $10, tails you pay $10 — most people decline. The expected value is zero, but the chance of losing looms larger. From a series of experiments, Tversky and Kahneman (1992) estimated that losses weigh roughly twice as much as equal gains.
In everyday life:
- We sell shares that have risen quickly and hold falling ones “until they get back to even.”
- “Don’t lose $10 by missing this” sounds stronger than “Save $10 now.”
- Cancelling at the end of a free trial feels oddly wasteful.
Loss aversion is not equally strong everywhere, though. Some research finds the effect weak or absent for small, routine amounts (Gal & Rucker, 2018). It is more accurate to say that the bigger the stakes and the clearer the risk, the more we lean toward avoiding losses than that people always dislike losses twice as much.
How to be swayed less: re-ask the decision not as “lose or gain” but as “from where I stand now, which way is better going forward?” For a falling share, a good question is “Would I buy it today at this price?” Being pulled along by money already spent — the sunk cost fallacy — has the same root (more in our sunk cost fallacy article).
The endowment effect: it gains value once it is ours
The endowment effect is valuing the same object more highly the moment we own it.
Kahneman, Knetsch and Thaler (1990) gave coffee mugs to some students, then asked owners what price they would sell for and non-owners what they would pay. The mugs were identical and randomly assigned, yet sellers asked for more than twice what buyers offered. Giving up something we own registers as a loss.
It is why we struggle to throw away things we have not used in years, and why we tend to overprice what we sell second-hand.
How to be swayed less: ask, “If I did not own this, would I buy it back at this price?” If not, the price you have in mind probably reflects the fact of owning it, not what it is worth.
Choice overload: more options, harder choices
Choice overload is putting off a decision, or feeling less satisfied afterwards, when there are too many options.
The best-known evidence is Iyengar and Lepper’s (2000) jam study. A tasting table with 24 jams drew more shoppers, but only about 3% bought; with 6 jams, about 30% did. Barry Schwartz brought the idea to a wide audience in The Paradox of Choice (2004).
The effect is less reliable than its fame suggests. When Scheibehenne, Greifeneder and Todd (2010) combined 50 experiments, the average effect was close to zero. Choice overload is not a constant law; it shows up when conditions like these stack up:
- The options are hard to compare (many criteria, no obvious winner).
- You do not yet know what you want.
- You are short on time, or the decision feels high-stakes.
How to be swayed less: before choosing, set two or three criteria that really matter, then stop at the first option that meets them. Schwartz called people who hunt for the very best “maximizers” and those who stop at good enough “satisficers,” and reported that satisficers tend to regret their choices less.
The peak-end rule: we remember the high point and the ending
The peak-end rule says that when we look back on an experience, our judgement is driven not by its length or average but by its most intense moment and its final moment.
Kahneman and colleagues (1993) had participants hold a hand in cold water (14°C) for 60 seconds on one trial, and on another trial for the same 60 seconds followed by 30 more seconds in slightly less cold water (15°C). The second trial involved more total discomfort, yet when asked which to repeat, most chose the longer one — because it ended a little less badly. Redelmeier and Kahneman (1996) found the same pattern in colonoscopy patients: those whose procedure ended more comfortably remembered the whole experience as less painful.
You can use this in two ways:
- Designing good experiences: end a trip, gathering or lesson well, and the whole thing is remembered better.
- Checking your own judgement: make sure a bad ending is not making you remember a long, mostly fine experience as bad overall.
One question for each effect
| Effect | Question to ask yourself |
|---|---|
| Loss aversion | Setting the feeling of loss aside, which way is better from here? |
| Endowment effect | If I did not have it, would I buy it back at this price? |
| Choice overload | What are the two or three criteria that really matter? |
| Peak-end rule | Beyond the peak and the ending, how was the whole thing? |
These biases are not signs that something is wrong with us. They come from a mind built to be sensitive to change and to save effort. Asking just one of these questions before an important decision can noticeably narrow the gap between how something feels and what it is actually worth.
References
- Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk. Econometrica, 47(2), 263–291.
- Tversky, A., & Kahneman, D. (1992). Advances in prospect theory: Cumulative representation of uncertainty. Journal of Risk and Uncertainty, 5(4), 297–323.
- Gal, D., & Rucker, D. D. (2018). The loss of loss aversion: Will it loom larger than its gain? Journal of Consumer Psychology, 28(3), 497–516.
- Kahneman, D., Knetsch, J. L., & Thaler, R. H. (1990). Experimental tests of the endowment effect and the Coase theorem. Journal of Political Economy, 98(6), 1325–1348.
- Iyengar, S. S., & Lepper, M. R. (2000). When choice is demotivating: Can one desire too much of a good thing? Journal of Personality and Social Psychology, 79(6), 995–1006.
- Scheibehenne, B., Greifeneder, R., & Todd, P. M. (2010). Can there ever be too many options? A meta-analytic review of choice overload. Journal of Consumer Research, 37(3), 409–425.
- Schwartz, B. (2004). The Paradox of Choice: Why More Is Less. Ecco.
- Kahneman, D., Fredrickson, B. L., Schreiber, C. A., & Redelmeier, D. A. (1993). When more pain is preferred to less: Adding a better end. Psychological Science, 4(6), 401–405.
- Redelmeier, D. A., & Kahneman, D. (1996). Patients’ memories of painful medical treatments: Real-time and retrospective evaluations of two minimally invasive procedures. Pain, 66(1), 3–8.