Losing money hurts almost twice as sharply as winning the same amount feels good, and that one fact explains most bad exits ever made.

In the late nineteen seventies, two psychologists named Daniel Kahneman and Amos Tversky ran experiments asking people simple questions about gains and losses of equal size. They found something strange: the pain of losing a hundred rupees is felt more intensely than the pleasure of gaining the same hundred rupees. Not slightly more. Roughly double.

This became known as loss aversion, and it later won Kahneman a Nobel Prize.

Here is where it shows up every single day in a trading account. A winning position gets sold early — not because the analysis changed, but because the mind wants to lock in the good feeling before it can disappear. A losing position gets held long after the reason for holding it has stopped making sense — not because holding makes sense, but because selling means admitting the loss is real, and that admission hurts almost twice as much as the loss itself.

Cutting winners short and letting losers run look like two different mistakes. They come from the exact same instinct, pointed in two directions.

There's a second version of this too. The price you first bought at becomes a kind of gravity — every later decision gets pulled back toward it, even when it no longer means anything. Selling below your entry feels like defeat, even after the entry price itself has stopped mattering.

None of this is a sign of a weak trader. Kahneman's experiments were run on ordinary people making small, everyday choices, and the pattern held almost every time. The mind isn't broken. It's simply reacting the way it always has, built for a world where losing something really did threaten survival.

The fix isn't more willpower in the moment — that's exactly when this feeling is strongest. The fix is a rule written down before you enter the trade, read again exactly as written when the feeling shows up to argue against it.