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CFA Level I · CFA Level I Exam · The Behavioral Biases of Individuals

A portfolio manager reads only research articles supporting her bullish view on a energy stock and ignores reports that point to weakening demand. This behavior is most likely an example of:

This is most likely confirmation bias. The manager selectively gathers and weighs information that supports her existing bullish belief while overlooking evidence that contradicts it. Hindsight bias relates to past outcomes, and representativeness relates to classifying by resemblance.

  1. AConfirmation biasCorrect
  2. BHindsight bias
  3. CRepresentativeness bias

Explanation

Confirmation bias is the tendency to seek and favor information that supports an existing belief while discounting contrary evidence. Hindsight bias concerns viewing past events as predictable. Representativeness classifies new information by resemblance to past experiences.

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