The affect heuristic

Atlas of Cognitive Biases #48 · Time, emotions and state. Emotion disguised as analysis

What it looks like in trading

An example from a session

After a great week every chart looks like an opportunity. After a poor one, every chart looks like a trap. The charts didn't change; the mood did.

What the research says

Finucane, Alhakami, Slovic and Johnson (2000): under time pressure, people judged risk and benefit as inversely related (something good = low risk), even though in reality they often go together. Paul Slovic and colleagues (2007) described the affect heuristic as a fast, emotional decision shortcut.

Related biases

Frequently asked questions

What is the affect heuristic?

Judging risk and benefit on the basis of a momentary emotion. When something “feels good”, it also seems less risky and more rewarding.

How does the affect heuristic show up in trading?

Typical signs: your favourite market or setup seems safer; after a bad day everything looks threatening; decisions driven by euphoria or fear.

Educational content, not psychological advice or an investment recommendation.