Samantha Lee, a portfolio manager, primarily invests in technology stocks. because most of the successful managers she regularly interacts with work in technology investing. During a seminar, Lee states, "Most successful portfolio managers specialize in technology stocks." Lee's statement likely demonstrates which behavioral bias?

Question

BlackTom AI · Accepted Answer

Representativeness and availability are the two relevant biases here.

1) Relevant knowledge points and concepts
- Representativeness bias: judging the probability that an object or person belongs to a category by how similar it is to a stereotypical case, often neglecting base rates and sample size. People extrapolate from a few salient examples to the whole population.
- Availability bias: assessing frequency or likelihood based on how easily specific examples come to mind; vivid or recent examples are overweighted relative to their true frequency.
- Anchoring and confirmation biases are different: anchoring fixes on an initial reference point; confirmation seeks information that confirms an existing belief.

2) Step-by-step reasoning
- Samantha primarily interacts with successful managers who work in technology. That is a small, nonrandom sample biased toward tech-focused managers.
- She generalizes from that sample — "Most successful portfolio managers specialize in technology stocks." That is an inference from similarity of observed examples to the broader population, characteristic of representativeness.
- The reason she overestimates the prevalence of tech specialization is that the tech-focused successful managers are highly available in her memory and social circle; their examples come to mind easily, leading her to overestimate their frequency — characteristic of availability bias.

3) (No numerical calculations needed.)

4) Why the correct answers are correct
- Representativeness fits because she infers a population-level pattern based on a nonrepresentative, stereotypical sample and likely neglects base-rate information about the broader manager population.
- Availability fits because her judgment is driven by easily recalled examples (the successful managers she interacts with), causing an overestimation of how common tech specialization is.

5) Why the other choices are incorrect
- Anchoring: no initial numeric anchor or reference point is being used to adjust a judgment.
- Confirmation: no active search for or selective attention to confirming evidence is described; the issue is generalization from available examples rather than selective evidence gathering.

6) Conclusion
Both representativeness (a) and availability (d) explain her statement. Final answer: a and d.

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