CFA Level II Exam · Guidance for Standard IV: Duties to Employers

Standard IV(C) Responsibilities of Supervisors for CFA Level 2

Updated 7 October 2026 · Fact-checked

Standard IV(C) requires members to make reasonable efforts to detect and prevent violations of laws, rules, regulations and the Code and Standards by anyone under their supervision or authority. You solve questions by checking whether adequate compliance procedures existed, whether the supervisor acted when warning signs appeared, and whether delegation was properly overseen.

Understand Standard IV(C) Responsibilities of Supervisors

Standard IV(C) says members must make reasonable efforts to detect and prevent violations of applicable laws, rules, regulations and the Code and Standards by anyone subject to their supervision or authority. The word that matters is reasonable. A supervisor is not expected to guarantee that nobody ever breaks a rule. The supervisor is expected to take sensible steps to stop it and to find it early.

A supervisor is anyone with authority over others, whether or not the job title says so. Your duty depends on your actual authority, not your title. If you are a member and you oversee people, the Standard applies to you.

The compliance function works the same way. Compliance personnel who have no actual authority over the person who committed the violation are not that person's supervisor. A person who does have authority over the violator is a supervisor and is covered by the Standard, whatever the title says.

The core tool is a compliance system. An adequate system is in writing, is clear and easy to understand, and is communicated to staff. It should state who is responsible for what, set out the procedures to follow, explain the consequences of a breach, and include monitoring to check that the procedures are followed.

If the firm has no adequate procedures, the rule is clear: a supervisor who finds the procedures inadequate should decline in writing to accept supervisory responsibility until adequate procedures are adopted.

A supervisor who delegates tasks stays responsible for the outcome. Delegation is allowed, but the supervisor must choose a competent person and keep up reasonable oversight of the work. Handing off a task does not hand off the duty.

When a supervisor learns of a violation, the supervisor must act promptly. That means investigating, stopping the conduct, and often placing limits on the employee's activity (for example heightened supervision or restricting the employee's actions) while the matter is examined. Reporting to senior management or compliance and recording the steps taken are part of a reasonable response. Ignoring red flags is the typical breach.

Key formulas to remember

Core duty: Supervisor must make reasonable efforts to detect and prevent violations by those under supervision or authority; Standard is about reasonable effort, not a guarantee that no violation occurs.
Elements of an adequate compliance system: Written, clear, communicated, assigns responsibility, sets procedures, states consequences, includes monitoring; If the firm's system lacks these, the supervisor should decline in writing to accept supervisory responsibility until adequate procedures are adopted.
Delegation rule: Delegation allowed, but responsibility stays with the supervisor; Choose a competent delegate and keep reasonable oversight.
Response to a known violation: Act promptly: investigate, stop, limit activity, report, document; Delay or inaction after a red flag is a breach of IV(C).
Supervisor vs compliance officer: Supervisory duty arises from authority over people, not from job title; Compliance personnel without actual authority over the violator are not that person's supervisor. A person with authority over the violator is a supervisor, whatever the title.

How to solve Standard IV(C) Responsibilities of Supervisors questions

Use the same sequence on every IV(C) item. It keeps you inside the vignette facts and away from guessing.

1Identify who has supervisory authority over whom. Look at actual authority, not just titles.
2Find the violation or warning sign in the vignette and note when the supervisor learned of it.
3Check whether the firm had an adequate written compliance system that was communicated to staff.
4Check what the supervisor did: investigated, stopped the activity, limited the employee, reported, documented.
5Check any delegation. Was the delegate competent, and did the supervisor keep reasonable oversight?
6Decide if the supervisor made reasonable efforts to detect and prevent violations. Name Standard IV(C).
7Choose the option that matches the most prompt and complete corrective action, not the one that just passes the problem on.

Quickest way: Three-question check for IV(C)

When to use it: Use when time is short and the vignette describes a supervisor, an employee breach and some firm procedures.

Was there an adequate written system? If no, the supervisor should decline in writing to accept supervisory responsibility until one is adopted.
Did the supervisor react to red flags quickly with investigation and limits on the employee?
Did delegation keep reasonable oversight? If any answer is no, there is a IV(C) violation.

Common mistakes in Standard IV(C) Responsibilities of Supervisors

Thinking the supervisor must guarantee no violations occur.
Students read the duty as strict liability.
Fix: Remember the standard is reasonable efforts. A supervisor who had good procedures and acted promptly has not violated IV(C) just because an employee broke a rule.
Assuming only people with a supervisor title are covered.
Students focus on job titles in the vignette.
Fix: Ask who has actual authority over the employee. Authority creates the duty.
Treating delegation as removing responsibility.
Students think handing a task to a competent person ends the supervisor's duty.
Fix: Delegation is allowed, but the supervisor still needs reasonable oversight and remains responsible.
Choosing 'report it to compliance and do nothing else' as sufficient.
Escalation feels like the safe answer.
Fix: Reporting is part of the response. The supervisor should also investigate and limit the employee's activity while the issue is reviewed.
Confusing a compliance officer's duties with a supervisor's duties.
Both roles deal with rule-following, so they blur together.
Fix: Compliance personnel without actual authority over the violator are not that person's supervisor. Anyone with authority over the violator is a supervisor, whatever the title.
Accepting or keeping supervisory responsibility when no adequate procedures exist.
Students assume supervising now and fixing the procedures later is fine.
Fix: A supervisor who finds the procedures inadequate should decline in writing to accept supervisory responsibility until adequate procedures are adopted.

Worked examples

Example 1

Vignette: Mei Tan is head of a portfolio management team at a global asset manager and has held the role for several years. The firm has a short verbal policy on personal trading that was never written down or distributed. A junior analyst on Tan's team repeatedly trades ahead of client orders. Tan notices the pattern in a monthly report but takes no action because the trades are small. Question 1: Which Standard did Tan violate in her role as supervisor? Question 2: What should Tan have done on noticing the pattern?

Show the solution

The analyst's conduct, trading ahead of client orders, violates Standard VI(B) Priority of Transactions. That is the analyst's breach, not Tan's.
Tan has actual authority over the junior analyst, so she is a supervisor under IV(C). The question asks about her conduct as supervisor.
The firm's policy was verbal, unwritten and not communicated, so the compliance system was not adequate.
Under the guidance, a supervisor who finds the procedures inadequate should decline in writing to accept supervisory responsibility until adequate procedures are adopted. Tan did not do this.
Tan also saw a red flag and did nothing. She did not make reasonable efforts to detect and prevent a violation.
Q1: In her role as supervisor, Tan violated Standard IV(C) Responsibilities of Supervisors.
Q2: She should promptly investigate, stop or limit the analyst's trading while the matter is reviewed, and report it to senior management or compliance, documenting her actions. Because the procedures were inadequate, she should also decline in writing to accept supervisory responsibility until a written, communicated compliance policy is adopted.

Answer: Q1: Standard IV(C) for Tan as supervisor; the analyst's own conduct violates Standard VI(B) Priority of Transactions. Q2: Act promptly by investigating, restricting the analyst's activity, reporting and documenting, and decline in writing to accept supervisory responsibility until adequate written procedures are adopted.

Example 2

Vignette: Rahul Mehta supervises a research group. He delegates review of the group's client communications to a newly hired associate with no compliance experience and never checks the associate's work. A later review finds several reports with unsupported claims, which were sent by an analyst Mehta supervises. Question 1: Did Mehta violate IV(C)? Question 2: Does delegating the review remove his responsibility?

Show the solution

Mehta has authority over the research group, so IV(C) applies to him.
He delegated to a person without relevant experience, so the choice of delegate was not reasonable.
He did no oversight of the delegated work, so he did not keep reasonable monitoring in place.
Unsupported claims went to clients without detection, which shows detection efforts were inadequate.
Q1: Yes, he failed to make reasonable efforts to detect and prevent violations.
Q2: No. Delegation is permitted, but the supervisor remains responsible and must provide reasonable oversight.

Answer: Q1: Yes, Mehta violated Standard IV(C). Q2: No, delegation does not remove his responsibility; he must choose a competent delegate and keep reasonable oversight.

Exam tips

Look for the trigger words in the vignette: a red flag noticed, an unwritten policy, or a task handed off with no checking. Each points to IV(C).
Prefer the answer showing prompt, active steps: investigate, restrict, report and document. Passive or delayed responses are usually wrong.
Remember the standard is about reasonable efforts. If the vignette shows good written procedures and quick action, the supervisor may well have complied.
Decide who is the supervisor by actual authority, not title, before judging anyone's conduct.
If the firm lacks adequate procedures, the supervisor should decline in writing to accept supervisory responsibility until adequate procedures are adopted.

Standard IV(C) Responsibilities of Supervisors in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Standard IV(C) Responsibilities of Supervisors: frequently asked questions

Who counts as a supervisor under Standard IV(C)?

Anyone with authority over others, whatever the job title. The duty comes from actual authority over the person who commits the violation. A member who oversees staff must make reasonable efforts to detect and prevent violations by them.

What makes a compliance system adequate under IV(C)?

It should be in writing, clear, and communicated to employees. It should assign responsibilities, set out procedures, state consequences for breaches and include monitoring. If the firm's system falls short, the supervisor should decline in writing to accept supervisory responsibility until adequate procedures are adopted.

Is a supervisor responsible if an employee breaks a rule despite good procedures?

Not automatically. The Standard requires reasonable efforts, not a guarantee. A supervisor who had adequate procedures and responded promptly to any warning signs has met the duty.

What is the difference between a supervisor and a compliance officer under the Code and Standards?

A supervisor has authority over specific people and must reasonably supervise them. Compliance personnel without actual authority over the violator are not that person's supervisor. A person with authority over the violator is a supervisor, whatever the title.