Psychological asymmetry of gains and losses
The pain of losing the same amount of money is felt much more intensely than the joy of gaining it
Gain → ← Loss Reference point +100,000 KRW -100,000 KRW
Gain curve (rises gently)
Loss curve (falls much more steeply)
Key figure

The pain of losing 100,000 KRW is felt about 1.5 to 2.5 times more intensely than the joy of gaining 100,000 KRW. The difference in the slope of the curves clearly illustrates this asymmetry.