The "Laws, Regulations, and Guidelines" section makes up a massive 45% of your Series 66 score. Yet most candidates who fail this section don't miss questions because they forgot a rule; they fail because they misjudge an adviser's intent in a complex scenario. The exam is designed to find out if you can spot a fiduciary breach hidden in a seemingly normal client interaction.
Series 66 unethical practices, governed by the Uniform Securities Act and NASAA Model Rules, prohibit behaviors that create conflicts of interest or harm clients. Key areas tested include improper soft dollar arrangements, personal borrowing from clients, failing to meet strict custody rules for client assets, and executing principal or agency cross transactions without the required client consent and disclosure.
Key facts
- Exam Content
- Developed by NASAA (North American Securities Administrators Association)
- Exam Administration
- Administered by FINRA (Financial Industry Regulatory Authority)
- Scored Questions
- 100 multiple-choice questions
- Exam Sections
- Economic Factors (5%), Investment Vehicles (20%), Client Recommendations (30%), Laws & Regulations (45%)
- Passing Score
- 73% (73 correct answers)
- Recommended Study
- 60-90 hours
The Core of Ethics: Fiduciary Duty Over Rules
The Series 66 exam is less about memorizing a legal code and more about internalizing a single principle: fiduciary duty. An investment adviser (IA) and an investment adviser representative (IAR) must act in the absolute best interest of their clients. This means placing client interests above your own, avoiding conflicts of interest, and providing full and fair disclosure of all material facts.
The exam writers at NASAA construct scenarios to test this. They don't just ask, "Is borrowing from a client allowed?" They create a story about a long-time client in a tough spot who offers you a loan. The wrong way to study is to just memorize the rule. The right way is to understand why the rule exists: to prevent the conflict of interest that would cloud your professional judgment. Try VoraPrep's free Series 66 practice questions to see how these scenarios are built.
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What Are Soft Dollar Arrangements? (Section 28(e))
A soft dollar arrangement is a practice where an investment adviser uses client commission dollars to pay a broker-dealer for research and brokerage services. While not illegal, these arrangements are a minefield of potential conflicts and are heavily tested.
The key authority is Section 28(e) of the Securities Exchange Act of 1934, which provides a "safe harbor" for these arrangements if the services received help the adviser in their investment decision-making. For state-registered IAs, the focus is on full disclosure and ensuring the services directly benefit clients.
Permissible Soft Dollar Uses
These are services that directly assist the IA in their investment advisory duties for clients.
- Research reports and analytical software.
- Economic and industry analysis.
- Portfolio management software.
- Attendance at a research seminar or conference.
Prohibited Soft Dollar Uses
These are services that primarily benefit the adviser's business operations, not the client's portfolio.
- Office rent, furniture, or utilities.
- Computer hardware or general accounting software.
- Salaries for administrative staff.
- Marketing or client solicitation fees.
Can an IAR Borrow From or Lend to a Client?
The answer is almost always no. The NASAA Model Rule on Unethical Business Practices generally prohibits IAs and IARs from borrowing money from or lending money to clients. This rule exists because such arrangements create an unacceptable conflict of interest and compromise the adviser's objectivity.
The Exceptions Are Narrow and Specific
There are only a few situations where this might be permissible:
- The client is a financial institution: You can take out a normal car loan or mortgage from a client that is a bank.
- The client is an immediate family member: Borrowing from or lending to a parent, sibling, or child may be allowed.
- The client is also a registered person at the same firm.
Outside of these specific, testable exceptions, any personal loan between you and a client is a violation. It does not matter if the client initiated the offer, if the terms are fair, or if you document it in writing.
Calculate Your Series 66 Score & Study Hours by Domain
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What Constitutes Custody of Client Assets?
Custody means holding, directly or indirectly, client funds or securities, or having the authority to obtain possession of them. This is one of the highest-risk activities an IA can engage in, and the rules are extremely strict.
If an IA has custody, they must:
- Notify the state Administrator in writing.
- Use a qualified custodian (like a bank or broker-dealer) to hold the assets.
- Keep client assets segregated from the IA's own assets.
- Provide clients with quarterly account statements from the custodian.
- Undergo an annual surprise audit by an independent CPA.
What Is (and Is Not) Considered Custody
Custody is not just about physically holding a stock certificate. It can be triggered indirectly. For example, having full power of attorney over a client's account or being the trustee of a client's trust constitutes custody.
However, two common exam scenarios are not considered custody:
- Inadvertent Receipt: If you accidentally receive client funds or securities, you are not deemed to have custody if you return them to the sender within three business days.
- Third-Party Checks: If a client gives you a check made payable to a third party (e.g., "Pay to the order of Fidelity Investments"), you can forward it to that third party without it being considered custody.
Your client, David, hands you a check for $50,000 to add to his advisory account. He mistakenly made the check payable to you, "Jane Doe, IAR," instead of your firm or the custodian.
Step 1: Identify the trap. By accepting a check made out to you personally, you have taken custody of client funds. Your good intentions are irrelevant. Step 2: Choose the correct action. You must return the check to David within three business days and instruct him to write a new check payable to the qualified custodian (e.g., "Pershing LLC"). Step 3: Name the wrong answer. The tempting wrong answer is to deposit the check into your firm's account and then wire the money to the custodian. This action confirms you have taken custody. Once you deposit that check, your firm is subject to the full weight of custody regulations, including the expensive annual surprise audit.Agency Cross vs. Principal Transactions: What's the Difference?
Both agency cross and principal transactions involve the IA acting in a capacity beyond just giving advice, creating significant conflicts of interest. The exam requires you to know the different disclosure and consent rules for each.
Agency Cross Transactions
In an agency cross transaction, the IA acts as a broker for both their advisory client and the other party in the transaction. For this to be ethical under NASAA Model Rule 202(e)(1)-1(b)(4), the IA must:
- Obtain prior written consent from the client authorizing the IA to perform agency cross transactions. This can be a blanket consent.
- Disclose the full remuneration the IA will receive from both sides.
- Provide a written trade confirmation to the client.
- Not recommend the transaction to both the buyer and the seller.
Principal Transactions
A principal transaction is even more fraught with conflict. Here, the IA sells a security to a client from its own inventory or buys a security from a client for its own inventory. The IA is the other side of the trade.
The rules are much stricter:
- The IA must disclose the capacity in which it is acting (as a principal) in writing before the completion of the transaction.
- The IA must obtain client consent for that specific transaction before the completion of the transaction. A blanket consent in the advisory agreement is not sufficient.
What Other Unethical Practices Are Tested?
While the major topics above are critical, the exam also covers a range of other prohibited practices.
Churning and Suitability
Churning is excessive trading in a client's account solely to generate commissions. Suitability violations involve recommending an investment that is inconsistent with the client's objectives, risk tolerance, and financial situation. Both are fundamental breaches of fiduciary duty.Unauthorized Trading and Discretionary Authority
Executing a trade without client permission is a violation unless the IA has discretionary authority. For an IA, this authority must be granted in writing from the client. Verbal discretion is not sufficient.
Sharing in Client Profits or Losses
An IA or IAR is prohibited from sharing directly in the profits or losses of a client's account. This prevents advisers from taking undue risks with client money. The only exception is for joint accounts with family members where sharing is proportionate to capital contributed.
Guarantees and Misleading Advertising
Advisers cannot guarantee a specific result or promise to protect a client against loss. Furthermore, advertising cannot be misleading. A key point for IAs is that the use of testimonials is strictly prohibited. You cannot use a client's positive review in an advertisement.
Comparison of Key Conflict-of-Interest Transactions
| Feature | Soft Dollar Arrangements | Agency Cross Transactions | Principal Transactions |
|---|---|---|---|
| Definition | Using client commissions for research/brokerage services. | Adviser acts as agent for both buyer and seller in a trade. | Adviser buys from or sells to a client from its own account. |
| Key Condition | Full disclosure; services must benefit clients. | Prior blanket written consent is permissible. | Trade-by-trade written consent required before settlement. |
| Common Exam Trap | Confusing an IA operational benefit with a client research benefit. | Assuming the IA can recommend the trade to both sides. | Using a blanket consent from the advisory agreement. |
Preparing for Ethical Dilemmas on the Series 66
Mastering the ethics portion of the Series 66 requires moving from memorization to application.
- Focus on the "Why": Every rule is designed to prevent a specific conflict of interest. Understand that conflict, and the rule will make sense.
- Drill Scenario Questions: The best way to prepare is with realistic practice questions. VoraPrep's adaptive learning engine has over 1,500 questions with detailed rationales that explain why the right answer is right and, just as importantly, why the wrong answers are wrong.
- Master the Details: For custody, principal trades, and agency cross, the details matter. Know the specific consent and disclosure requirements cold. Our FSRS Spaced-Repetition Flashcards are perfect for locking in these critical rules.
- Get Help When Stuck: If a concept isn't clicking, don't spin your wheels. With VoraPrep, you can ask Vory, your 24/7 personal tutor, for a step-by-step explanation right inside any question.
A deep understanding of these topics is non-negotiable for passing. For a full breakdown of all topics, see our Series 66 Complete Blueprint Study Guide (2026).