FINMAN E2 TOPIC 4 AND 5 Flashcards
- It is a mental shortcut that we use when
estimating probabilities. When we’re trying to
assess how likely a certain event is, we often
make our decision by assessing how similar it
is to an existing mental prototype.
REPRESENTATIVE BIAS
People use unconscious
mental statistics to
figure out what the
“average” member of a
category looks like
Prototype Theory
When we are trying to make
decisions about unfamiliar
things or people, we refer to
this average— the prototype—
as a _____ example of
the entire category
representative
Types of Representativeness Bias
- BASE-RATE NEGLECT
- SAMPLE-SIZE NEGLECT
Some investors tend to rely
on stereotypes when making
investment decisions.
- BASE-RATE NEGLECT
When judging the likelihood
of a particular investment
outcome, often fail to
accurately consider the
sample size of the data on
which they base their
judgments
SAMPLE-SIZE NEGLECT
Harmful effects of Representativeness
Bias on Investors
When evaluating a money manager’s past performance,
investors have the potential to make costly mistakes. They
review the most recent quarters or even years and draw
the incorrect statistical conclusion that the fund’s
performance is the product of careful security selection
and/or competent asset allocation
Similar errors are made by investors when looking into the
track histories of stock experts. For instance, they
incorrectly judge an analyst’s skill based on the
performance of their last few suggestions, which is a small
sample of data
Psychologists have found
that people have
tendencies to rely too
heavily on the very first
piece of information they
learn, which can have a
serious impact on the
decision they end up
makin
ANCHORING BIAS
Effects of Anchoring
Bias
Poor decision-making
* Skewed expectations
* Dismissal of new information
3 ways to Identify
Anchoring Bias
- Relying on a single source of
information - Disregarding conflicting facts
- Being reluctant to accept new idea
Tips for reducing
anchoring bias
- Use multiple sources - One way
to reduce anchoring bias is to
collect more information. - Evaluate your reasoning -
When you arrive at a new
conclusion, ask yourself how you
came to that conclusion. - Ask for a second opinion - If you
think you’ve used anchoring
bias, ask someone else for their
opinion
How to avoid
anchoring bias
By becoming more aware of it,
anchoring bias happens
subconsciously, and when one isn’t
aware something is happening, it’s
difficult to interrupt it.
- To look for reasons why that anchor is
inappropriate for the situation. - Considering alternative options
- Delay your decision