Emotions vs. Evidence in Investment Decisions

When a stock you own falls 20%, you do not feel analytical. You feel afraid. When it rises 30%, you do not feel cautious. You feel confident. These emotional states are not neutral background conditions — they actively distort the evidence you notice and how you interpret it.

Why This Matters

Emotion and analysis are not separate systems that operate in parallel. Neuroscience confirms that emotional states precede and shape cognitive processing — you do not first analyse and then feel; you often feel first, and your analysis then works to justify that feeling. In investing, this means that fear, excitement, and regret are not inconveniences to manage around. They are active distorters of information processing that change which data you seek, what evidence you weight, and what conclusions you reach.