Series 63 Ethical Practices: Prohibited Conduct (2026)

Why is ethical practices the most important Series 63 section?

Two reasons. First, the weight: at 25% of the exam, ethical practices and obligations is the single largest section, ahead of communications with customers and well ahead of everything else. If you map your study time to the NASAA weighting (and you should), this is where the most of it goes. Second, the failure pattern: this is one of the two sections where under-prepared candidates lose the most points, as covered in why people fail the Series 63.

The material is almost pure memorization. There is little math here. Instead you are recalling exactly what an agent may do, must do, and must never do, plus the precise conditions attached to the gray-area conduct. The exam writes deliberately plausible wrong answers, so close-enough recall usually maps to a distractor. The fix is to learn the rules cold and to drill scenarios until the prohibited conduct jumps out at you.

This article walks through the four building blocks of the section: compensation and its disclosure, custody and discretion, the prohibited-practices list, and the obligation to protect vulnerable adults.

How does agent compensation work, and what has to be disclosed?

Start with how a firm gets paid, because several violations hang off it. When a broker-dealer acts as an agent (an intermediary matching your order with a counterparty), it charges a commission, which must be disclosed separately on the trade confirmation. When the firm acts as a principal (trading from its own inventory), it earns a markup on a sale to the customer or a markdown on a purchase from the customer. The markup or markdown is built into the price rather than itemized, but the confirmation must still disclose whether the firm acted as agent or principal.

Two principles drive most compensation questions. Pricing and fees must be fair and reasonable in light of the circumstances, and disclosure does not cure an excessive charge. Telling a customer in advance that you will charge a high markup does not make that markup fair. A charge that is unreasonable stays a violation even when fully disclosed. The same reasonableness standard applies to miscellaneous service fees (transfers, safekeeping, custody, collecting dividends): they have to be reasonable and equitable, not whatever the firm feels like charging.

Mutual fund sales add their own disclosure duties. An agent must disclose all sales charges and may not call a fund “no-load” if it carries a front-end load, a contingent deferred sales charge, or ongoing distribution fees above the small threshold the rules allow. The classic trap here is the breakpoint: if a customer is about to invest just under the dollar amount that would earn a reduced sales charge, the agent must tell them, even if the customer never asks. Deliberately keeping a purchase just below a breakpoint to preserve a higher commission is a prohibited practice. The same logic flags unsuitable share-class recommendations and switching a customer between similar funds mainly to generate fresh sales charges.

What are the rules on custody, commingling, and discretion?

This block is about who controls customer money and securities, and how loosely or tightly an agent may act on the customer’s behalf. It produces some of the most testable distinctions in the whole section.

Custody, safekeeping, and commingling

Customer assets a firm holds must be kept segregated in separate, identifiable accounts in the customer’s name. They may never be mixed with the firm’s own funds or securities. Mixing them is commingling, and it is a prohibited practice on its own, even if nothing is stolen. Actually taking customer assets for personal or firm use, even temporarily, is conversion, which is theft and a far more serious violation. Keep the two straight: commingling is mixing, conversion is taking.

Discretion and written trading authorization

An agent exercises discretion when the agent decides any one of three things without checking with the customer first: which security, how much, or whether to buy or sell. Exercising discretion requires written authorization from the customer, accepted by the broker-dealer, obtained before the first discretionary trade. Oral authorization is not enough for ongoing discretionary trading. There is no grace period for an agent: the limited window some study materials mention (placing a trade on oral authority and papering it shortly after) belongs to investment advisers, not to agents at a broker-dealer.

The one narrow exception is time-and-price discretion. If the customer has already decided the security, the amount, and the action (“buy 100 shares of XYZ at a good price today”), the agent may choose only when and at what price to execute, and only for that day. That is not full discretion and needs no written authorization. But “invest 10,000 dollars in something good for me” hands the agent the choice of security, which is discretion and requires written authorization first.

A related distinction worth knowing: a full trading authorization lets a third party buy, sell, and withdraw cash or securities, while a limited trading authorization permits buying and selling but no withdrawals. Discretionary accounts also carry heightened supervision, because excessive trading is the hallmark abuse in an account the agent controls.

What conduct is flat-out prohibited for a Series 63 agent?

This is the core of the section. An agent must observe high standards of commercial honor and just and equitable principles of trade, and the rulebook spells out specific prohibited practices. The list is explicitly not exhaustive: conduct like forgery, embezzlement, or other deceptive acts is grounds for discipline even though it is not itemized. Here are the ones the exam tests most often.

A few of these reward extra attention because the exam attaches conditions to them.

Sharing in a customer account. An agent may share in the profits and losses of a customer’s account, but only with written approval from both the customer and the broker-dealer, and only in proportion to the agent’s own financial contribution. Customer consent by itself is not enough. Do not confuse this with commission splitting, which is dividing transaction-based pay; that is allowed only with another agent registered at the same firm or a firm under common control, never with an unregistered person.

Market manipulation, in three flavors. A wash trade involves one person trading with themselves through accounts they control, so beneficial ownership never changes. Matched orders involve two or more parties coordinating equal-and-opposite trades at substantially the same size, time, and price. Painting the tape is a series of transactions designed to create the appearance of active trading or to push the price, in order to lure other investors in. A legitimate agency cross (matching a genuine buyer with a genuine seller) is not a matched order.

Why is borrowing from a customer the biggest agent-vs-adviser trap?

Because the answer flips depending on which hat the person is wearing, and the Series 63 is the agent exam. Burn this in:

The classic question reads: “An agent’s customer is a bank. May the agent borrow from the customer?” The answer is no. The bank exception is an adviser exception, and the question is testing whether you will wrongly apply it to an agent. On the Series 63, which regulates agents, the agent answer is the one that counts. (The adviser-side rules surface on the adviser exams; here, agent equals absolute prohibition.)

What are an agent’s obligations toward vulnerable adults?

The newest material in this section deals with protecting older and otherwise vulnerable adults from financial exploitation. You will not be asked to recite specific day counts, so focus on what is mandatory versus what is permissive, and on the immunity that goes with acting in good faith.

In plain terms: if a qualified person at the firm reasonably believes financial exploitation may have occurred or is being attempted, reporting it is mandatory (to both the state securities regulator and adult protective services). The firm may place a temporary hold on a questionable disbursement while it runs an internal review, and it may alert a trusted contact the customer named ahead of time, unless that contact is the one suspected of the exploitation. An agent who reports, delays, or discloses in good faith and with reasonable care is protected from liability for taking those steps. The key recall items are which actions are required, which are optional, and the no-notifying-a-suspect rule.

How does the exam test the ethics section?

Almost entirely through scenarios. A question describes an agent doing something and asks whether it is permitted, what is required, or which rule it violates. The wrong answers are written to sound reasonable, which is exactly why precise recall beats general familiarity here.

The most efficient way to prepare is to drill questions in this section, review the explanation on every miss, and keep returning to the handful of traps above. When you can predict the wrong answer before reading the choices, you are ready. Move between this material and the related sections so the connections stick: ethics overlaps heavily with how agents must communicate with customers and with the registration rules that define who counts as an agent in the first place.

When you want to test yourself, the Series 63 practice test and the Series 63 question bank lean into the ethics scenarios where most candidates lose ground.