Series 66 · Laws, Regulations, and Guidelines · Free Lesson

Ethical practices and fiduciary obligations (compensation, custody, discretion, conflicts of interest, AML, insider trading, cybersecurity)

Free NASAA Series 66 (Uniform Combined State Law Examination) lesson in Laws, Regulations, and Guidelines. 31 min read, ~4,621 words.

The same recommendation carries different duties depending on who makes it, so start with your role. An investment adviser is in the business of giving securities advice for compensation. An investment adviser representative acts for an adviser, for example by giving advice, managing accounts, or selling advisory services. A broker-dealer handles securities transactions through its agents.

The North American Securities Administrators Association (NASAA) publishes model rules that each state may adopt in its own way. Apply the Uniform Securities Act of 1956 and the operative rules as of October 29, 2026.

A fiduciary must put clients' interests first. The adviser's duty of care requires understanding the client's finances, objectives, risk tolerance, and circumstances before providing suitable advice in the client's best interest. Seek best execution when selecting brokers. Provide monitoring appropriate to the advisory relationship.

The duty of loyalty addresses conflicts of interest, situations where another interest could compromise your judgment. Eliminate conflicts or provide full and fair disclosure sufficient for informed client consent. Consent never excuses advice contrary to the client's best interest.

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Exam shortcut

Identify the actor first: adviser, agent, firm, access person, or custodian. Another actor's rule is a common distractor. Underline the action: choosing trades, withdrawing assets, receiving compensation, or sharing information. Circle boundary language such as “at least,” “exceeding,” “before,” and “business days.” When an answer says “disclose and proceed,” check whether the conduct instead requires mitigation, elimination, written consent, or prohibition.

The full lesson (about 4,621 words, 31 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.

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