Standard V(A): Diligence and Reasonable Basis
Be diligent, independent and thorough, and have a reasonable and adequate basis, backed by appropriate research, for every analysis, recommendation or action. You may rely on others' research or models once you have checked they are sound, and you may stay on a group report you disagree with if the process was reasonable.
Before this: Standard IV(C): Responsibilities of Supervisors
On the exam
- Demonstrate the application of the Code of Ethics and Standards of Professional Conduct to situations involving issues of professional integrity
- Recommend practices and procedures designed to prevent violations of the Code of Ethics and Standards of Professional Conduct
- Identify conduct that conforms to the Code and Standards and conduct that violates the Code and Standards
Demonstrate V(A) and spot the missing step. Expect third-party research, quantitative model and group-decision vignettes. The deciding fact is usually whether the member checked the source, tested the model or followed a reasonable process.
How deeply to learn each part
- Know the idea
- Understand it in general. It frames other topics, but you will not calculate with it.
- Use it
- Understand it well enough to solve a question with it. Recognize when it applies.
- Memorize
- Learn it by heart. The exam will not give it to you.
You know this one. The full lesson is folded away. The takeaways, formulas and checkpoint below are your quick refresher, and the checkpoint is a fair test of whether you still do.
You tested strong here. The full lesson is folded away. The takeaways, formulas and checkpoint below are your quick refresher, and the checkpoint is a fair test of whether you still know it.
What does Standard V(A) require?
You must exercise diligence , independence and thoroughness when you analyze investments, make recommendations or take investment actions. You must also have a reasonable basis , supported by appropriate research and investigation, for each of them.
Memorize
How much work counts as enough is not fixed. It depends on the investment (more for a complex or illiquid product), your role in the decision, the firm’s philosophy and the resources it gives you. What never changes is the duty to cover the pertinent issues and to be able to show what you relied on.
Typical ingredients of a basis are macro conditions, a company’s operating and financial history, industry conditions, a fund’s fees and track record, a model’s output and limits, and a fair choice of peers.
- Your own research Use it filings, management calls, industry and macro context
- Others' research Memorize
- Secondary research done by someone else in your firm
- Third-party research done outside the firm, such as a broker
- Check assumptions, rigor, timeliness, objectivity and independence
-
- Quantitative models Use it
- Understand assumptions and limitations
- Test before use including extreme scenarios
- Developers owe a higher level of diligence than users
-
- External advisers Use it
- Code of ethics
- Compliance and internal controls
- Quality of reported returns
- Process and adherence to strategy
-
When can you rely on other people’s research?
Research done by a colleague in your firm is secondary research . Research from a broker, bank or research house is third-party research . In both cases you must make reasonable efforts to confirm it is sound before relying on it.
Check four things: the assumptions used, the rigor of the analysis, how timely it is, and whether its recommendations are objective and independent. Blogs, aggregation sites and social media call for more checking than established research houses.
You may rely in good faith on your firm’s own vetting of a data vendor, unless you have reason to doubt it. If you suspect that a source lacks a sound basis, do not use it. A firm should also review its approved research providers regularly. If it has no such policy, encourage it to adopt one.
What must you do with quantitative models?
Using a model does not remove your duty. You do not have to be an expert in every technical detail, but you must understand the quantitative models you use, including their assumptions and limitations, and how their results fed your decision.
Test a model’s output before you build it into your process, and include extreme positive and negative scenarios. Data from commercial databases may not contain a full market cycle, so a model that never saw a falling market has not been tested for one. People who build models owe a higher level of diligence than people who only use the output, and a thorough test must come before distribution.
How should you vet external advisers and subadvisers?
When you hire an outside manager for part of the portfolio, review the external advisers as diligently as you would review an individual fund or security. Use standard criteria, and check on a schedule afterward, not only before hiring.
The criteria include the adviser’s code of ethics, its compliance and internal controls, the quality of its published returns, and its investment process and adherence to its stated strategy.
What if you disagree with a group report?
Many reports come from teams. The published view is the consensus of the group research , not necessarily the view of each name on the cover. If you believe the consensus has a reasonable and adequate basis and is independent and objective, you need not remove your name, even though it differs from your own opinion. You may record your dissenting opinion in the file.
Dissociation is for a conclusion that lacks a reasonable basis, not for ordinary disagreement.
Try this 0 of 3
- Get every case right first time
- Rule on all six pieces of evidence first time
- Get the committee case right first time
Case 1 of 5 Press release buy
Imogen Varga, CFA, covers battery makers at Tallow Street Research. Velmor Cells announces a supply contract with an unnamed carmaker. Imogen reads the press release, has a two-minute call with Velmor's investor relations team, and publishes a "buy" rating the same afternoon. She does not read the contract filing or Velmor's accounts, and she does not ask how much the contract is worth or when deliveries start.
Step 1 of 4 Violation or not?
Did Imogen break the Code and Standards?
Read the case, then answer each step. 5 cases.
Where do the lines fall?
| Situation | Verdict |
|---|---|
| An analyst issues a “buy” based only on a company press release and a two-minute call | Violation (no reasonable basis) |
| A manager uses a vendor’s credit model after reviewing its assumptions and back-tests | Fine |
| A team member disagrees with the committee’s rating, the process was thorough, and she stays on the report | Fine (may document dissent) |
| A fund picks a subadviser on past returns alone, without checking its controls | Violation |
| A quant manager never tests a strategy under falling-market conditions, and it fails in one | Violation (insufficient testing) |
| A thoroughly researched stock falls 30% after an unexpected event | No violation (the process was sound) |
Exam tip “The broker said it was fine” and “the vendor built the model” are never enough on their own. The member must still check.
Which procedures does a firm adopt?
Compliance practices that support V(A):
- a policy that research, ratings and recommendations have a substantiated, reasonable basis, with a supervisory analyst or committee reviewing them before release;
- detailed written guidance on due diligence, with measurable criteria for research quality and for accuracy over time;
- minimum scenario testing for all computer-based models, covering breadth of scenarios, accuracy over time and sensitivity of cash flows to inputs;
- criteria for outside data providers and a stated review frequency;
- standard criteria for external advisers, including how often and on what basis allocations are reviewed.
Go deeper Why a bad result does not prove a violation
Every investment carries downside risk, however good the research. Members can base decisions only on the information available when they make them. A well-run process can still lose money, and a careless one can get lucky. So a regulator or an exam question looks at what was done: sources checked, models understood, risks considered. A loss alone is not the test. Tell clients what you reviewed, or offer to, so they can judge the reasonableness of your work.
Go deeper Due diligence questionnaires and model risk
Firms usually standardize adviser reviews with a due diligence questionnaire that covers ownership, compliance staff, controls, valuation and reporting. Model risk, the chance that a model is wrong or misused, is a core theme in portfolio management risk management. V(A) is the ethical rule behind that discipline: know the model, test it, and do not hide behind it.
Memorize this
MemorizeStandard V(A): what to know cold
| Situation | What you must do |
|---|---|
| Your own recommendation | Exercise diligence, independence and thoroughness; have a reasonable and adequate basis backed by research |
| Secondary (same firm) or third-party (outside firm) research | Make reasonable efforts to confirm it is sound. Check assumptions, rigor, timeliness, objectivity and independence |
| Quantitative model | Understand its assumptions and limitations; test it before use, including extreme scenarios |
| External adviser / subadviser | Review as carefully as a security: code of ethics, compliance and controls, return data quality, process and adherence to strategy |
| Group report you disagree with | Stay on it if the consensus has a reasonable basis and is independent and objective. You may document your dissent |
| Outcome | A bad result after a diligent process is not a violation |
Memory hook Trust, then verify: who wrote it, what did they assume, how hard did they look, is it current, are they independent?
Know it cold No reasonable basis (thin sources, unchecked research, untested model) = violation. A sound process that still loses money = no violation.
- Your own research Use it filings, management calls, industry and macro context
- Others' research Memorize
- Secondary research done by someone else in your firm
- Third-party research done outside the firm, such as a broker
- Check assumptions, rigor, timeliness, objectivity and independence
-
- Quantitative models Use it
- Understand assumptions and limitations
- Test before use including extreme scenarios
- Developers owe a higher level of diligence than users
-
- External advisers Use it
- Code of ethics
- Compliance and internal controls
- Quality of reported returns
- Process and adherence to strategy
-
How it is asked
-
Relying on research without checking it
A manager buys a structured note a broker recommended without reading the terms. Violation?
Yes, V(A). Trap: "the broker is responsible".
-
Disagreeing with a group report
An analyst disagrees with a committee rating reached after a thorough review. What must she do?
Nothing required. She may stay on the report and document her dissent. Trap: "must remove her name".
-
Untested quantitative model
A model is never tested under falling markets and fails in one. Which Standard?
V(A). Models need scenario testing, including extreme ones. Trap: blaming the loss, not the missing test.
-
Bad outcome after good process
A thoroughly researched stock falls 30%. Violation?
No. Diligence is judged on the process, not the result. Trap: "the loss proves a lack of diligence".
Exam traps
- Thinking you must remove your name from a group report you disagree with. If the process was reasonable you may stay on it and document your dissent.
- Using third-party research with no review. You may rely on it only after reasonable efforts to confirm it is sound.
- Treating a poor outcome as proof of a lack of diligence. The test is the process and information available at the time.
- Believing a model's output needs no scrutiny because a vendor built it. You must understand its assumptions and limitations.
- Choosing a subadviser on past returns alone. Its controls, compliance and process must be reviewed too.
Checkpoint
4 exam-style questions. About 90 seconds each.
1An analyst on a five-person research committee disagrees with the committee's "buy" rating, which was reached after a thorough, independent review. The analyst most appropriately:
2A portfolio manager buys a structured note recommended by a broker without reading its terms or understanding how it pays off. Did the manager violate the Standards?
3Before relying on a third-party research report, a member should most appropriately:
4A fund hires a subadviser because its three-year returns are the highest in its peer group. No one reviews the subadviser's compliance procedures or process. Did the fund's manager violate the Standards?
Key takeaways
- Every recommendation or action needs a reasonable, adequate basis backed by research.
- Check third-party research, understand and test models, and vet subadvisers before and after hiring.
- You may stay on a group report you disagree with if its process was sound, and you may document your dissent.
- Diligence is judged on the process, not on the result.
All Ethical and Professional Standards formulas, every lesson
Questions about this lesson?
Where this comes back
- Standard V(B): Communication with Clients and Prospective Clients Guidance for Standard V: Investment Analysis, Recommendations, and Actions
Questions candidates ask
What is a reasonable basis under the CFA Standards?
It is the evidence a member can point to that supports a recommendation or action: company and industry research, checked outside sources, and understood, tested models. How much is enough depends on the product, the member's role and the firm's resources.
Can I rely on third-party research?
Yes, after reasonable efforts to confirm it is sound. Look at its assumptions, rigor, timeliness and independence. Blogs and social media need closer review. If you suspect the source lacks a sound basis, do not rely on it.
Do I have to remove my name from a group report I disagree with?
No. If the consensus has a reasonable and adequate basis and is independent and objective, you can stay on the report. You may document your dissent, but you are not required to dissociate.
Spotted an error? Tell us and we will fix it.