S3 Flashcards
(56 cards)
Emotional biases caused by
Impulse
Intuition
Or result from reasoning influenced by feelings
Sources of cognitive biases
Errors :
Statistical
Information processing
Memory
Or result from reasoning based on faulty thinking.
Adjectives describing traditional vs behavioral finance
Traditional finance - prescriptive
Behavioral finance - descriptive
Utility theory
People maximize PV of Utility considering PV of budgetary contraints.
4 axioms of utility
Completeness - people choose A or B or are indiferent
Tranzitivity - if A is better than B and B is better then C then A is better then C
Continuity - inlimited amount of optins to combine A with B to get a constant (indiferent) level of utility
Independence - if A is better than B then A+xC is better than B+xC
Bayes formula
P(A/B) = P(B/A) * P(A) / P(B)
Probability A happening given B already happenend =…
Utility wealth function for risk NEUTRAL individual is
A straight line with positive slope.
Utility ealth function for risk AVERSE individuals is
Concave curve.
Utility wealth function of risk SEEKING individuals is
Convex curve.
Bounded rationality assumes…
assumes knowledge capacity LIMITS and removes the ASSUMPTIONS of ...perfect information, ...fully rational decision making, and ...consistent utility maximization.
Satisficing is when individuals
Find acceptable/satisfactory solution as opposed to optimal.
7 steps of Editing/framing part of decision process
... Codification ... Combination ... Segregation ... Cancelation ... Simplification ... Dominance detection
Behavioral approach to asset pricing
Discount rate used in asset valuation should include a SEMNTIMENT premium (which accou ts for dispersion of analyst estimates)
Behavioral portfolio theory - portfolio are constructed…
in layers to satisfy goals rather than to be mean variance efficient.
Benavioral life cycle hypothesis - Suggests people classify their…
… assets into nonfungible mentals accounts when planning savings/consumption and as a result achieve a non optimal balance between short term gratification and LT goal achievement.
Cognitive errors - 2 categories
Belief perseverance biases
Information processing biases
5 Cognitive errors… Belief perseverance biases
CRICH
Are related to cognitive dissonance - mental discomfort when new infomration contradicts with oreviously held beliefs
CONSERVATISM. Slow or unwilling to react to new information
Mitigation: Look carefully at the new information itself to determine its value.
CONFIRMATION. Focus just on positive information about an investment . Leads to overconfidence and overweighiting.
Mitigation: seek contradiction and analyze it carefully.
REPRESENTATIVENESS. 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.
ILLUSION OF CONTROL over investment outcomes. Can lead to excessive trading or concentrated portfolios.
Mitigation: Seek opinions of others. Keep records of trades to see if successful at controlling investment outcomes.
HINDSIGHT. Overestimate accuracy of their forecasts and take too much risk.
Mitigation: Keep detailed record of all forecasts, including the data analyzed reasoning behind the forecast.
4 Cognitive errors… Informations processing.
FAMA
ANCHORING AND ADJUSTMENT.. 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: Portfolios in layered pyramids of assets. ignore correlations. May consider income and capital gains separately.
Mitigation: Look at all investments as a single portfolio.
FRAMING: individuals focus on one piece of information and lose sight of the overall situation or how the information.
Mitigation: Investors should focus on expected returns and risk, rather than on gains or losses.
AVAILABILITY: Four causes are retrievability, categorization, narrow range of experience, and resonance.
Impact: Select investments based on how easily their memories are retrieved and categorized. Narrow range of experience can lead to concentrated portfolios.
Mitigation: Develop an IPS and construct a suitable portfolio through diligent research.
Conservatism
vs anchoring
vs status quo
Conservatism. Belief perserverance. Avoiding new info.
Anchoring. Information processing problem.
Status quo. Holding constant portfolio.
6 Emotional biases
LOSSER
Loss AVERSION Bias - Myopic loss aversion combines the effects of time horizon and framing.
Impact: Focus on current gains and losses. Continue to hold losers in hopes of breaking even. Sell winners to capture the gains.
Mitigation- Perform a thorough fundamental analysis. Overcome mental anguish of recognizing losses.
OVERCONFIDENCE Bias Impact: Hold under-diversified portfolios; underestimate the downside while overestimating the upside potential. Trade excessively.
Mitigation: Keep detailed records of trades, including the motivation for each trade. Analyze successes and losses relative to the strategy used.
SELF-CONTROL Bias Impact: Lack discipline to balance short-term gratification with long-term goals. Tend to try to make up the shortfall by assuming too much risk.
Mitigation: Maintain complete, clearly defined investment goals and strategies. Budgets help deter the propensity to over-consume.
STATUS QUO Bias Impact: Risk characteristics profitable assets.
Mitigation: Education about risk and return and proper asset. Difficult to mitigate.
ENDOWMENT Bias Impact: Value of owned assets of the portfolio change. Investor loses out on potentially higher than same assets if not owned. Stick with assets because of familiarity and comfort or were inherited.
Mitigation: Determine whether the asset allocation is appropriate.
REGRET AVERSION Bias Impact: Stay in low-risk investments. Portfolio with limited upside potential. Stay in familiar investments or “follow the herd.” Mitigation: Education is primary mitigation tool.
Goals-based investing - recognizes/builds
recognizes that individuals are subject to loss aversion and mental accounting. Builds a portfolio in layers, each consisting of assets used to meet individual goals.
Behaviorally Modified Asset Allocation - how to deal with biases
Emotional biases can be accomodated, especially for higher wealth relative to lifestyle need.
Congnitive biases must be mitigated/educated, especially for lower wealth vs lifestyle needs more often accommodated through deviations from the rational asset portfolio allocation.
BBK 5 FACTOR MODEL
Adventurer…
Confident + Impetuous
Bbk 5 factor model
Celebrity…
Impetuous and anxious