CFA Level I Exam · The Behavioral Biases of Individuals

Investment Policy Statement and Behavioral Bias Mitigation

Updated 7 October 2026 · Fact-checked

Bias mitigation means reducing the effect of behavioral biases on investment decisions. Cognitive errors come from faulty reasoning and can usually be moderated with better information and education. Emotional biases come from feelings and are harder to fix, so advisors usually adapt to them. An IPS adds discipline to both.

Understand Investment Policy Statement and Bias Mitigation

Behavioral biases are systematic tendencies that push investors away from rational, utility-maximizing decisions. In the CFA curriculum they split into two groups. Cognitive errors come from faulty reasoning, poor memory or mistakes in processing information. Emotional biases come from feelings, impulses or intuition rather than calculation.

The split matters because the cure differs. Cognitive errors are mistakes of thinking, so the investor can often be corrected with facts, education, a clearer process or better advice. You can moderate them, meaning reduce or remove the bias. Emotional biases are rooted in feelings. Arguing rarely changes them, so the advisor often has to adapt, meaning build the plan around the bias instead of trying to remove it.

The curriculum also says that moderating is more practical for cognitive errors, and that adapting is more practical for emotional biases. The reason is simple. Fixing an emotional bias may need the client to change their personality or feelings, which is hard. Fixing a cognitive error needs only better information or a better method.

The investment policy statement (IPS) helps with both. It records the client's return objective, risk tolerance, constraints and time horizon in advance, when the client is calm. It acts as a written rule to return to when markets are stressful or when a client wants to chase a trend. Advisors also use it to set asset allocation, rebalancing rules and decision procedures that reduce impulsive action.

Biases also affect portfolios in visible ways. Loss aversion can lead to portfolios that are too conservative. Overconfidence can lead to excess trading and too little diversification. Status quo and endowment bias can leave a client holding an inherited concentrated position. Mental accounting can lead to treating money in separate buckets rather than as one portfolio. Behavioral finance also tries to explain some market anomalies, which is a different question from how an individual should be advised.

Key formulas to remember

Moderate vs adapt rule: Cognitive error → moderate (reduce the bias); Emotional bias → adapt (accept the bias and plan around it); This is the default answer. It is a practical guideline, not an absolute law, so read the question for any contrary facts.
Cognitive error categories: Belief perseverance: conservatism, confirmation, representativeness, illusion of control, hindsight. Information processing: anchoring and adjustment, mental accounting, framing, availability; Know which category each bias belongs to.
Emotional biases: Loss aversion, overconfidence, self-control, status quo, endowment, regret aversion; These are the ones the advisor usually adapts to.
Role of the IPS: IPS = objectives (return, risk) + constraints + agreed process, written before stress arrives; It gives a pre-commitment to fall back on when the client wants to act on a bias.

How to solve Investment Policy Statement and Bias Mitigation questions

Use this method for any question on identifying a bias and choosing how to respond.

1Read the client's behavior or statement and name the bias it describes. Look for key words such as 'ignores new information', 'holds because it was inherited', or 'sure of own skill'.
2Classify the bias as cognitive (reasoning or information processing error) or emotional (feeling or impulse).
3Apply the rule: moderate for cognitive errors, adapt for emotional biases.
4Identify the portfolio effect, for example too little diversification, excess trading, or too much cash.
5Choose the response that fits the classification: education, data and a structured process for moderating; adjusting the allocation or plan for adapting.
6Check whether the IPS is the right tool, such as a written allocation, rebalancing rule or diversification limit.
7Eliminate the options that apply the wrong response to the bias type, then pick the remaining one.

Quickest way: Classify then respond

When to use it: Use this when you have about 90 seconds and the question asks which bias is present or how an advisor should respond.

Underline the behavior in the stem and name the bias.
Ask: is this a reasoning mistake or a feeling? Reasoning means cognitive, feeling means emotional.
Cognitive means moderate with information and education. Emotional means adapt the plan.
Cross out the two options that do the opposite, then choose the one left.

Common mistakes in Investment Policy Statement and Bias Mitigation

Saying emotional biases should be moderated by educating the client
Education works so well for cognitive errors that students apply it everywhere.
Fix: Remember that emotional biases come from feelings and are hard to change. The usual advice is to adapt to them.
Classifying loss aversion or overconfidence as cognitive errors
Overconfidence sounds like a thinking problem, and the word 'illusion of control' is cognitive, which muddles the two.
Fix: Learn the lists. Overconfidence and loss aversion are emotional biases in this curriculum. Illusion of control is a cognitive belief perseverance bias.
Mixing up the two cognitive subgroups
Belief perseverance and information processing both sound like 'bad thinking'.
Fix: Belief perseverance means clinging to existing beliefs. Information processing means mishandling new data, as with anchoring, framing, mental accounting and availability.
Treating the IPS as a document that only lists returns
Students recall the objectives and constraints but forget its behavioral role.
Fix: State that the IPS is also a pre-agreed discipline that helps the client stick to the plan under stress.
Assuming adapting means doing nothing about the bias
The word 'accept' is read as 'ignore'.
Fix: Adapting means changing the portfolio or advice to suit the bias, for example choosing a more conservative allocation for a loss-averse client, so the client can stay invested.

Worked examples

Example 1

A client inherited a large block of her late father's employer shares. Although the shares make up most of her portfolio, she refuses to sell because 'they were Dad's'. Which behavioral bias is most likely at work, and how should the advisor respond?
A. Anchoring, moderate it by providing new data
B. Endowment bias, adapt to it
C. Hindsight bias, moderate it by education

Show the solution

Name the bias: holding an asset only because it was received or owned is endowment bias.
Classify it: endowment is driven by emotion and attachment, so it is an emotional bias.
Apply the rule: emotional biases are usually adapted to rather than moderated.
Check the options: A names the wrong bias and uses the wrong response. C names the wrong bias and treats it as cognitive. B matches the bias and the response.

Answer: B. Endowment bias is emotional, so the advisor should adapt, for example by building a diversification plan that sells the position gradually.

Example 2

An investor keeps buying shares of a company despite several poor earnings reports. He reads only articles that support his view and dismisses contrary analysis. Which is the best way to deal with this behavior?
A. Adapt to the bias by lowering his target return
B. Moderate the bias by encouraging him to review contradictory evidence and use a structured process
C. Adapt to the bias by increasing his equity allocation

Show the solution

Identify the bias: seeking only supportive information is confirmation bias.
Classify it: confirmation bias is a cognitive error in belief perseverance, a reasoning problem.
Apply the rule: cognitive errors are moderated with better information and process.
Check the options: A and C both adapt, which fits emotional biases, and neither addresses the evidence problem. B moderates through contrary evidence and a structured process.

Answer: B. Confirmation bias is cognitive, so the advisor should moderate it with balanced evidence and a disciplined, documented process.

Exam tips

Memorize the two lists of biases and the rule that cognitive errors are moderated and emotional biases are adapted to. Many items are won on this alone.
Do not confuse a bias with its portfolio effect. The stem may describe the effect, such as excess trading, and you must name the bias behind it.
Watch the verbs in the options. 'Educate' or 'provide data' signals moderating. 'Adjust the allocation' or 'build the plan around' signals adapting.
Eliminate options that name the wrong bias or apply the wrong response (moderate vs adapt) to the bias type, then check what remains.
Read for exceptions. The rule is a guideline, so if the stem says the client is open to new information, moderating may be reasonable.

Practice questions from The Behavioral Biases of Individuals

Investment Policy Statement and Bias Mitigation: frequently asked questions

What is the difference between moderating and adapting to a bias?

Moderating means reducing or removing the bias, usually through information, education or process. Adapting means accepting that the bias will remain and adjusting the portfolio or advice to suit it. Moderating suits cognitive errors and adapting suits emotional biases.

How can I tell a cognitive error from an emotional bias?

Ask whether the mistake comes from reasoning or from feeling. Faulty logic, ignoring data or mishandling information points to a cognitive error. Impulses, attachment, fear of loss or overconfidence point to an emotional bias.

How does an IPS help control behavioral biases?

The IPS records the client's objectives, risk tolerance, constraints and agreed process in advance. When the client feels pressure to act on a bias, the advisor can point back to the plan. It also gives clear rules for allocation and rebalancing.

Are behavioral biases the same as market anomalies?

No. Biases describe how individuals decide, and market anomalies are patterns in prices that seem to contradict efficient markets. Behavioral finance is sometimes used to explain anomalies, but the exam treats them as separate ideas.