Reading 8 Flashcards
The behavioural biases of Individuals
Distinguish between cognitive errors and emotional biases
Cognitive errors:
- inability to analyse information
- basing decisions on partial information
- lack the capacity
- Can be divided into:
1) belief perseverance errors
2) information processing errors
Emotional errors:
- the way individuals frame the information and decision rather than the mechanical or physical process used to analyse and interpret it
- more of a spontaneous reaction
Identify and evaluate an individual’s behavioural biases
1) Cognitive Errors: Belief Perseverance
Cognitive Errors: Belief Perseverance
- Conservatism
- Confirmation
- Representativeness
- Control
- Hindsight
Identify and evaluate an individual’s behavioural biases
2) Cognitive Errors: Information Processing
Cognitive Errors: Information Processing
- Anchoring and adjustment
- Mental accounting bias
- Framing bias
- Availability bias
Identify and evaluate an individual’s behavioural biases
3) Emotional Biases
Emotional biases:
- Loss aversion bias
- Overconfidence bias
- Self-control bias
- Status quo bias
- Endowment bias
- Regret-aversion bias
Conservatism Bias
Cognitive: Belief Perseverance
Impact:
Slow to react to new information or avoid the difficulties associated with analysing new information.
Can also be explained in terms of Bayesian statistics; place too much weight on the base rates
Mitigation:
Look carefully at the new information itself to determine its value
Confirmation Bias
Cognitive: Belief Perseverance
Impact:
Focus on positive information about an investment and ignore or dismiss anything negative.
Can lead to too much confidence in the investment and to overweighting it in the portfolio
Mitigation:
Actively seek out information that seems to contradict your opions and analyse it carefully
Representativeness Bias
Cognitive: Belief Perseverance
Impact:
Place information into categories utilizing an if-then heuristic.
Place too much emphasis on perceived category of new information.
Likely to change strategies based on a small sample of information.
Mitigation
Consciously take steps to avoid base rate neglect and sample size neglect
Consider true probability that information fits a category
Use the periodic table of Investment Returns
Illusion of control bias
Cognitive: Belief Perseverance
Impact
Illusion of control over one’s investment outcomes can lead to excessive trading with the accompanying costs
Can lead to concentrated portfolios
Mitigation
Seek opinions of others
Keep records of trades to see if successful at controlling investment outcomes
Hindsight Bias
Cognitive: Belief Perseverance
Impact
Overestimate accuracy of their forecasts and take too much risk
Mitigation
Keep detailed record of all forecasts, including the data analysed and the reasoning behind the forecast
Hindsight bias is an ego defense mechanism analysts use to protect themselves against being wrong in their forecast. It is used by selectively recalling what actually happened, allowing the analyst to adjust their forecast accordingly and making it look like their forecast was more accurate than it actually was. Hindsight bias is possible when the original forecast is vague and ambiguous, a poor forecasting trait, allowing the forecast to be adjusted.
Anchoring and Adjustment
Cognitive: Information processing
Impact
Tend to remain focused on and stay close to their original forecasts or interpretations
Mitigation
Give new information thorough consideration to determine its impact on the original forecast or opinion
Mental Accounting bias
Cognitive: Information processing
Impact
Portfolios tend to resemble layered pyramids of assets
Subconsciously ignore the correlation of assets
May consider income and capital gains separately rather than as parts of the same total return
Mitigation
Look at all investments as if they are part of the same portfolio to analyse their correlations and determine true portfolio allocation
Framing bias
Cognitive: Information processing
Impact
Narrow a frame of reference; individuals focus on one piece or category of information and lose sight of the overall situation or how the information fits into the overall scheme of things
Mitigation
Investors should focus on expected returns and risk, rather than on gains and losses. That includes assets or portfolios with existing gains or losses
Availability bias
Cognitive: Information processing
Four cases:
1) Retrievability
2) Categorisation
3) Narrow range of experience
4) Resonance
Impact
Select investments based on how easily their memories are retrieved and categorised
Narrow range of experience can lead to concentrated portfolios
Mitigation
Develop an IPS and construct a suitable portfolio through diligent research
Loss Aversion Bias
Emotional bias
Impact
Focus on current gains and losses
Continue to hold losers in hopes of breaking even
Sell winners to capture the gains
Mitigation
Develop an IPS and construct a suitable portfolio through diligent research
Myopic Loss Aversion: combines the effects of time horizon and framing
Overconfidence Bias
Emotional bias
Impact
Hold under-diversified portfolios
Underestimate the downside while overestimating the upside potential
Trade excessively
Mitigation
Keep a detailed record of traces, including the motivation for each trade
Analyse successes and losses relative to the strategy used