Nearly half of the Series 66 turns on conduct rules: the Laws, Regulations, and Guidelines section is 45 of your 100 scored questions, and the conduct half covers fiduciary duty, client communications, compensation ethics, custody, and prohibited practices. The fastest mental model is the fiduciary lens (would a fully informed client call this fair and in their interest?) plus a memorized catalog of always-prohibited moves.
NASAAâs outline splits the law section into two halves. The structure half (who registers where, how securities get registered, what the administrator can do) lives in our companion guide to the Uniform Securities Act on the Series 66. This article covers the conduct half: communication with clients and prospects, compensation ethics, custody of client assets, and the flatly prohibited practices.
What does fiduciary duty mean on the Series 66?
Investment advisers and their representatives (IARs) owe clients a fiduciary duty: act in the clientâs best interest at all times, and either avoid conflicts of interest or disclose them fully enough that the client can give informed consent. The duty comes from the Investment Advisers Act of 1940 and its state-law counterparts, and it runs through the entire advisory relationship.
Broker-dealers and their agents answer to a different pair of standards: Reg BI at the federal level, which requires acting in a retail customerâs best interest at the time of a recommendation, and NASAAâs dishonest-or-unethical-practices standards at the state level, which spell out the specific conduct that can cost an agent their registration.
| Question | Investment advisers and IARs | Broker-dealers and agents |
|---|---|---|
| What standard applies? | Fiduciary duty: best interest at all times | Reg BI: best interest at the time of a recommendation |
| Where does it come from? | Investment Advisers Act of 1940 and state law | Federal Reg BI plus NASAAâs unethical-practices standards |
| How are conflicts handled? | Avoid them, or disclose fully for informed consent | Disclose and mitigate at the recommendation |
| How long does it run? | Throughout the relationship | Recommendation by recommendation |
Because the Series 66 qualifies you for both roles at once, the exam loves questions that hinge on which hat the person is wearing. A dually registered rep recommending a stock purchase in a commission-based brokerage account is acting as an agent under Reg BI; the same rep managing a fee-based advisory account owes a full fiduciary duty as an IAR. Name the hat first and the answer usually follows.
Before answering any conduct question, label the person: agent (commission, transaction by transaction, Reg BI) or IAR (fee, ongoing relationship, fiduciary). Wrong answers are often true statements about the other hat.
What are the communication rules?
Everything starts with disclosure: clients and prospects get full and fair disclosure of all material facts, including fees and compensation, conflicts of interest, disciplinary history, and the risks of what is being recommended. It has to come before or at the time of the transaction or engagement, and omitting a material fact is as much a violation as misstating one.
Two representations are unlawful on their face. First, registration never implies approval. You may state that you are registered; you may not suggest that the administrator, the SEC, or FINRA has endorsed you or passed on your competence. âIâm a registered adviser, which means the state has found me qualifiedâ is a violation. Second, performance guarantees are prohibited: no promising a client that they will not lose money or will earn a specific return, and no hedge clause that pretends to waive liability.
Client contracts have their own checklist. An advisory contract must be in writing, describe the services, state the fee schedule and how compensation is calculated, spell out the term with renewal and termination provisions, and disclose whether the adviser will exercise discretion. It cannot be assigned without the clientâs consent, and for an advisory partnership, a material change in membership counts as an assignment.
Advertising covers more than you might expect: websites, emails, webinars, and social media all count, and so can a like or share that amplifies a clientâs praise. Under the SECâs marketing rule for advisers, testimonials and endorsements are allowed only with disclosures: whether the person is a client, whether they were paid, and what conflicts they have. Advisers cannot make untrue or unsubstantiated claims, cherry-pick winning periods, or show gross performance more prominently than net, and hypothetical performance stays away from mass retail audiences. Firms supervise and archive all of it.
How is compensation tested?
Compensation questions come down to two things: is this form of pay permitted, and was it disclosed. Ordinary advisory fees (a percentage of assets, a flat fee, an hourly rate) are fine as long as the contract spells them out. Commissions are the agentâs world: transaction-based pay with a built-in incentive to trade more, which is why churning tops the prohibited list.
Performance-based fees get special treatment. Charging a fee tied to capital gains or capital appreciation is generally prohibited for ordinary clients. The exception is the qualified client: an individual with at least $1.4 million under management with the adviser, or a net worth above $2.7 million. Even then, the fee is generally expected to be symmetrical (a fulcrum fee): the adviser shares gains and losses against a benchmark, not just the upside.
Pay-to-play rules police political money. An adviser whose covered associate makes a political contribution to an official who can influence the hiring of advisers for a government entity is barred from receiving compensation for advising that entity for two years. Small contributions are carved out, with more room for candidates the contributor can vote for.
Soft dollars arise when an adviser routes client trades to a broker-dealer in exchange for research, and the arrangement is allowed only inside a safe harbor: the benefits must be eligible research and brokerage services that help the adviser make investment decisions, such as research reports, analytical software, and market data. Office rent, furniture, travel, and marketing never qualify. The arrangement must be disclosed, and it strains best execution: the adviser might pick a costlier broker for its own benefit.
The catch-all rule is disclosure. Every form of compensation gets disclosed, including referral fees, revenue sharing, Rule 12b-1 fees, and soft dollars, and an adviser cannot accept third-party compensation without the clientâs knowledge and consent.
Drill the Conduct Rules Until They Stick
CertFuel's adaptive question bank weights the law section the way the exam does, with scenario practice on fiduciary duty, custody, and compensation ethics. The Exam Readiness Gauge shows when the 45% section is ready to score.
Choose Your PathWhat are the custody and client-fund rules?
Custody means holding client funds or securities, directly or indirectly, or having the authority to get them. The definition is broader than it sounds: authority to deduct fees from a client account, serving as trustee for a clientâs trust, and holding a clientâs login credentials all count. Trading authority alone does not; a discretionary account gives you the power to trade, not the power to withdraw.
Custody triggers a stack of safeguards, all tested in words. Client assets sit with a qualified custodian (a bank, broker-dealer, or trust company), and clients receive account statements at least quarterly, directly from that custodian. A state-registered adviser must promptly notify the administrator that it has custody, and states can layer minimum financial requirements (a net-worth floor or a surety bond) on advisers with custody or discretion. The custody rule also brings an annual surprise examination by an independent accountant.
Discretion has its own gate: written client authorization, in the advisory contract or a limited power of attorney, before the first discretionary trade. Even with discretion, the adviser still owes suitability and best execution on every trade. And when the money is entrusted money (a trust, an estate), the prudent investor standard applies: judge each investment in the context of the whole portfolio, and diversify unless circumstances say otherwise.
Suitability has two layers the exam likes to separate: reasonable-basis suitability (do you understand the product well enough to recommend it to anyone?) and customer-specific suitability (does it fit this clientâs objectives, finances, and risk tolerance?).
Client-money questions also pull in anti-money-laundering basics. Firms run AML programs under the Bank Secrecy Act: verify who the customer is, file a suspicious activity report with FinCEN when a transaction of $5,000 or more involves suspected criminal activity, file a currency transaction report for cash over $10,000, and never tip off a customer that a report was filed.
Which practices are always prohibited?
Some conduct fails no matter how it is papered or who consents. This is the catalog to memorize; it shows up as fast, definitional questions:
| Prohibited practice | What it looks like |
|---|---|
| Churning | Excessive trading in a client account to generate commissions |
| Unauthorized trading | Any trade placed without discretion or the clientâs prior approval |
| Selling away | Doing securities business outside your firm without its knowledge and approval |
| Insider trading | Trading or tipping on material nonpublic information, no matter how you got it |
| Guarantees against loss | Promising a client cannot lose money or will earn a set return |
| Commingling | Mixing client funds or securities with the firmâs or your own |
| Loans with clients | Borrowing from or lending to clients, with only narrow exceptions for affiliated banks or broker-dealers |
| Sharing in profits or losses | Splitting account results without written consent and a proportionate contribution |
| Misrepresentation | Overstating qualifications, services, fees, or what registration means |
| Market manipulation | Wash trades, matched orders, and painting the tape to fake price or volume |
| Front-running | Trading your own account ahead of a known client order |
| Spreading rumors | Circulating false or misleading information to move a securityâs price |
Two patterns run through the list. Most entries put the professionalâs interest ahead of the clientâs: churning grinds a clientâs account for commissions, and front-running exploits advance knowledge of a clientâs order. The rest involve deception, from misrepresenting what registration means to faking trading activity. If an answer choice quietly benefits the professional at the clientâs expense, or hides something a reasonable investor would want to know, treat it as prohibited.
For ordinary conflicts, the playbook is avoid or disclose. The catalog is different: no disclosure makes churning, commingling, or a loss guarantee acceptable. When a question implies the client agreed, ask whether consent can fix the practice (sharing in profits, with written consent and a proportionate contribution) or never can (guaranteeing against loss).
The catalog responds well to spaced repetition: our Series 66 flashcards guide covers how to drill it efficiently.
What newer conduct topics appear?
Three newer conduct areas round out the outline, each tested in plain words.
Protection of vulnerable adults. When a firm reasonably suspects financial exploitation of a vulnerable adult (a client 65 or older, or an adult with a mental or physical impairment), it may place a temporary hold on disbursements from the account and must notify the state administrator and adult protective services. Acting in good faith brings protection from liability, so firms can safely slow the money down while someone checks on the client.
Cybersecurity and privacy. Firms maintain written policies protecting client information: privacy notices at the start of the relationship and annually after, a chance to opt out before nonpublic personal information goes to non-affiliated third parties, and safeguards such as access controls, encryption, and incident-response plans. Client information stays confidential unless the client consents or the law requires disclosure.
Business continuity and succession planning. State-registered advisers keep a written plan for running the business through a disruption: backups of books and records, alternate ways to reach clients, employees, and regulators, office relocation, and a succession answer for client relationships if a key person dies or becomes incapacitated. Plans get reviewed at least annually, and clients hear about material disruptions promptly.
They look minor, but they are on the official outline and usually appear as plain âwhich of the following is requiredâ questions.
How do you turn this into exam points?
Work the conduct half in three passes. First, internalize the fiduciary lens and the which-hat habit: most scenario questions resolve once you name the role and its standard. Second, memorize the prohibited-practices catalog cold; those questions are pure recall and should be quick points. Third, nail the few numbers this material carries: the qualified-client thresholds and the AML reporting triggers.
Then put the section in context: the conduct rules share the 45-question law section with registration and administrator powers, so split your review between the two halves. For a full plan, our guide on how to pass the Series 66 sequences all four NASAA sections by weight, and the Series 66 cheat sheet compresses the conduct rules onto one page for final review. When you are ready to check yourself, take a Series 66 practice test and count how many questions come straight from this catalog.