The simplest durable lesson here is this: loss aversion usually changes exit behavior long before it changes stated beliefs. Three quick checks before you act: 1. Name the mechanism in plain English: People rarely say "I cannot accept this loss." They say "I still believe in the thesis." The behavior gives away what the emotion is doing. 2. Say why it matters for behavior or portfolio decisions: That matters because unmanaged loss aversion often turns a review process into a delay process. 3. Set the review question: Explain in one sentence what problem this idea solves and what problem it does not solve. In real life: A position can stay in the book because realizing the pain feels worse than carrying the uncertainty. Common slip: The mistake is confusing emotional reluctance with analytical patience. That is the kind of small conceptual habit that compounds into better decisions over time.