Behavioral Finance for the CMT Exam: Biases, Prospect Theory & Anomalies

Behavioral Finance on the CMT Exam

Behavioral finance carries 15% weight on CMT Level 2 and is increasingly tested on Level 3. It bridges technical analysis with psychology — explaining why patterns repeat.

See the CMT exam guide 2026 for the full Level 2 breakdown.

Key Cognitive Biases

Overconfidence Bias

Investors overestimate their ability to predict market movements, leading to:

• Excessive trading
• Under-diversification
• Ignoring risk management principles

Anchoring

Relying too heavily on the first piece of information (the "anchor"). Example: refusing to sell because the stock was "worth" its ATH.

Confirmation Bias

Seeking information that confirms existing beliefs while ignoring contradictory data — dangerous for chart pattern analysis.

Loss Aversion

Kahneman & Tversky found the pain of losses is ~2× more powerful than the pleasure of equivalent gains.

Disposition Effect

Investors sell winners too early and hold losers too long — the reverse of optimal risk management.

Prospect Theory

The most important behavioral model for the CMT exam:

• People are risk-averse for gains = they lock in profits early
• People are risk-seeking for losses = they gamble to avoid realizing losses
• The value function is S-shaped: concave for gains, convex for losses

Herd Behavior

Markets exhibit herding when investors follow the crowd:

• Drives momentum effects (useful for moving average strategies)
• Creates bubbles and panic selling
• Measured through sentiment indicators

Market Anomalies

Practice behavioral finance questions in our test bank. See the full guide.