Topic 9 - Behavioural Biases and Decision Making Flashcards
behavioural biases
are systematic errors in our judgement and decision making processes.
Cognitive biases
are those biases based on faulty cognitive reasoning or cognitive errors.
Information Processing
Belief Perseverance
Information Processing
cognitive errors in processing information
Belief Perseverance
the tendency to cling to one’s previously held or recently established beliefs irrationally or illogically
Emotional biases
stem from our impulses or intuitions, and may be considered to result from reasoning influenced by feelings or emotions, rather than facts
Mental accounting
is a cognitive process in which individuals separate their financial assets and liabilities into different groupings or mental accounts
Rather than focus on their overall state of wealth, they instead focus independently on their different mental accounts
Framing
The response to a question should not depend on how the question is phrased.
if a scenario is presented in two different (but really equivalent) ways, individuals often make inconsistent choices.
Self-Attribution
have the tendency to ascribe their successes to innate aspects, such as talent or foresight, while more often blaming failures on outside influences, such as bad luck.
When an investor who is susceptible to self-attribution bias purchases an investment:
if it goes up, then it was due, naturally, to their business and investment savvy
if it goes down, then it was due, naturally, to bad luck or some other factor that was not the fault of the investor
Recency Bias
causes people to more prominently recall and emphasise recent events and observations than those that occurred in the near or distant past.
6 types of Belief Perseverance biases
Confirmation Bias Conservatism Illusion of Control Familiarity Hindsight Bias Cognitive Dissonance
Confirmation Bias
tendency to look for and notice information that supports or confirms our existing beliefs, while devaluing or ignoring information which contradicts our beliefs
Conservatism
mental process in which people cling to their prior views or forecasts at the expense of acknowledging new information
may cause the investor to underreact to the new information, maintaining impressions derived from the previous estimate rather than acting on the updated information
Illusion of Control
Human beings have the tendency to believe that they can control or at least influence outcomes when, in fact, they cannot.
contributes to investor overconfidence, which can lead investors to trade more than is prudent, maintain under-diversified portfolios, and exhibit a false sense of control over their investments.
Familiarity Bias
Occurs when investors have a preference for familiar investments despite the seemingly obvious gains from diversification
Investors also perceive these familiar assets as less risky and generating a higher return.
Hindsight Bias
occurs when people see past events as having been predictable or reasonable to expect.
often caused by the reconstructive nature of memory: when people look back, they often do not have perfect memory and tend to “fill in the gaps” with what they prefer to believe
Cognitive Dissonance
When newly acquired information conflicts with pre-existing understandings, people often experience mental discomfort
Commitment, which indicates an emotional attachment by an individual to a decision, always precedes the surfacing of cognitive dissonance
- If facts challenge the course to which a subject is emotionally attached, then those facts pose emotional threats
- Most people try to avoid dissonant situations and will even ignore potentially relevant information to avoid psychological conflict
The term cognitive dissonance encompasses the response
that arises as people struggle to harmonise cognitions and thereby relieve their mental discomfort
Loss Aversion (Prospect Theory)
looses loom larger than gains
That is, people generally feel a stronger impulse to avoid losses than to acquire equivalent gains
Disposition Effect
The disposition effect refers to people’s tendency to:
- Hang on to losers too long (risk-seeking behavior)-
- Sell the winners too soon (risk-avoidance behavior)
Overconfidence
unwarranted faith in one’s intuitive reasoning, judgments, and cognitive abilities.
Status Quo
tend to default to the same judgment or accept the current situation.
Status quo bias occurs when investors fail to update their investments despite potential gains from doing so.
regret aversion
People exhibiting regret aversion avoid taking decisive actions because they fear that, in hindsight, whatever option they select will prove less than optimal.
Regret aversion can also lead to herding behaviour
as ,for some individuals, buying into an apparent mass consensus can limit future regret.