Module V·Article IV·~1 min read
Behavioral Investing: How to Use Others’ Biases
Psychology of Investors and Markets
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From Theory to Practice
Behavioral finance not only describes problems, but also provides opportunities for a disciplined investor. If the market systematically makes mistakes, you can systematically take advantage of this.
Strategies Based on Behavioral Anomalies
Value investing (Graham, Buffett): buy assets trading below their intrinsic value due to pessimism, fear, or neglect. The market overreacts to bad news → shares of “hated” companies become cheaper than justified.
Contrarian investing: buy what is currently out of favor. “Everyone is buying gold” → gold becomes overvalued. Requires psychological strength to go against the crowd.
Momentum (trend following): in the short term, trends continue due to underreaction to news and herding. Momentum strategies work on a 3–12 month horizon.
Quality investing: companies with high ROE, low debt, and stable profits are systematically undervalued due to a preference for “exciting” stories.
Behavioral Traps of the Professional Investor
Institutional investors are not immune to biases:
- Career risk: a manager avoids nonstandard positions (to make a mistake with everyone is safer for one’s career)
- Short-termism: a quarterly assessment horizon vs. long-term value
- Agency problem: the interests of the manager ≠ the interests of the client
Practical Assignment
Develop an investment policy with behavioral “safeguards”: (1) Entry rules: under what conditions do you buy? (2) Exit rules: pre-defined stop-losses and targets. (3) “Cooling-off” rule: a mandatory pause before major decisions. (4) Review: how often do you check your portfolio (fewer checks → less impulsive decisions)?
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