Psychology & decisions

In «Thinking, Fast and Slow», Daniel Kahneman proposes that the brain operates through two systems. System 1 is fast, automatic, and intuitive — it acts without conscious effort and handles most everyday decisions. System 2 is slow, deliberate, and analytical, but requires mental energy and only activates when the situation demands it. Cognitive biases arise mainly when System 1 dominates decisions that should belong to System 2.

Taleb defines a black swan as a high-impact event with apparent low probability that always seems explainable in retrospect. In finance, systemic crises — the 1929 crash, the 2008 crisis, the 2020 pandemic — are black swans that conventional risk models failed to anticipate. The book argues that risk management should focus on robustness to the unexpected, not on predicting the probable.

James Clear argues that lasting behavioral change is built through small, repeatable habits tied to identity («I'm the kind of person who saves»). Applied to finance, this translates into automating savings, scheduling regular portfolio reviews, and eliminating friction from routine investment processes. The book doesn't address finance directly, but its principles transfer with notable effectiveness.

Robert Cialdini documents the six principles that trigger social compliance: reciprocity, commitment, social proof, authority, liking, and scarcity. For investors, recognizing these mechanisms is essential for resisting pressure from financial product salespeople, FOMO in bull markets, and recommendations from authority figures. Understanding persuasion helps make more independent decisions.