Reg BI vs Fiduciary Standard: Key Differences

The SEC’s Regulation Best Interest (Reg BI) and the fiduciary standard are two separate legal duties that govern broker-dealers and investment advisers respectively—with the fiduciary standard requiring advisers to prioritize clients’ interests above all else, while Reg BI requires brokers to provide “best interest” advice but permits conflicts of interest if disclosed and mitigated.

The Divide: Who Is a Broker vs. an Adviser

The distinction starts with regulatory identity:

Broker-dealers (or brokers) execute trades on behalf of clients. They buy and sell securities, options, and other instruments at customer direction or with customer approval. Brokers are regulated primarily under the Securities Exchange Act of 1934 and FINRA (Financial Industry Regulatory Authority). Wells Fargo, JPMorgan Chase, and Charles Schwab (in their brokerage divisions) are brokers.

Investment advisers (RIAs, or registered investment advisers) provide personalized advice on investing. They may also manage money—selecting securities and allocating a client’s portfolio—or they may advise only. Advisers are regulated under the Investment Advisers Act of 1940. Many independent wealth managers, robo-advisers, and portfolio managers are RIAs.

The two professions overlap. Many firms—especially large integrated banks like JPMorgan—operate both broker-dealer and advisory divisions, with different legal duties in each hat.

Regulation Best Interest (Reg BI)

Reg BI, adopted by the SEC in 2020 and effective in 2021, establishes a standard of conduct for brokers. It does not require brokers to be fiduciaries; instead, it requires brokers to:

Duty to Customers

When providing advice (including recommendations on specific products), the broker must act in the customer’s best interest. This is a higher standard than the old suitability rule, but lower than fiduciary duty. A broker is not required to put the customer’s interests above its own in all cases; it is required to identify and mitigate conflicts of interest that would interfere with giving best-interest advice.

Identifying and Disclosing Conflicts

The broker must:

• Identify conflicts of interest (e.g., the broker earns more commission from recommending Product A than Product B).
• Disclose those conflicts clearly to the customer.
• Mitigate the conflicts (e.g., policies and procedures to reduce pressure to sell high-commission products).

Notably, disclosure alone is not enough. The broker cannot simply tell a customer, “I earn more if you buy this,” and then recommend it anyway because the conflict is disclosed. The broker must also mitigate—adopt training, compensation policies, or oversight to reduce the incentive to make unsuitable recommendations.

Suitability Requirement

Before recommending a specific product, the broker must have a reasonable basis to believe the recommendation is suitable for the customer, considering:

• The customer’s age, experience, risk tolerance, financial situation, and investment objectives.
• The nature and risks of the product.
• The customer’s other holdings and overall portfolio context.

A broker cannot recommend a speculative penny stock to a 75-year-old retiree with a short time horizon, even if the broker discloses the conflict.

Fiduciary Standard

The fiduciary standard applies to investment advisers and is a much stricter legal duty. An adviser must:

Duty of Loyalty

The adviser’s primary obligation is to the client’s interests. The adviser cannot:

• Profit from a transaction without full disclosure and consent.
• Recommend an investment because the adviser earns a larger fee.
• Neglect the client’s interests to serve its own.

If a conflict of interest is unavoidable (e.g., an adviser earns more from managing a particular strategy), the adviser must disclose it and the client must affirmatively consent. Even then, if the conflict is severe, the adviser may be required to decline the engagement or restructure compensation.

Duty of Care

The adviser must:

• Know the client’s financial situation, objectives, and constraints.
• Provide advice that is suitable and consistent with that knowledge.
• Act with the skill and care expected of a professional adviser.

No Suitability, but Fiduciary-Aligned Recommendation

Technically, advisers are not bound by a “suitability” rule (that’s a broker standard). Instead, every recommendation must be consistent with the adviser’s fiduciary duty. This is often a stricter test. A fiduciary adviser cannot recommend a product simply because it is “suitable” to the client’s situation if the adviser knows a better alternative exists.

Example: A fiduciary adviser knows a client needs low-cost, diversified equity exposure. The adviser cannot recommend a 1.5% expense-ratio mutual fund if a 0.05% index ETF exists, even though both are suitable. The adviser is obligated to recommend the lower-cost option unless there is a compelling reason not to (e.g., the fund offers specialized strategies the client specifically needs).

Compensation and Conflict Structures

Brokers (Reg BI)

• May earn commissions on specific products (e.g., 0.5% on one mutual fund, 1% on another).
• May have compensation tied to sales volume or product profitability.
• May earn spreads on certain transactions.

All of these create conflicts of interest that Reg BI requires to be disclosed and mitigated.

Advisers (Fiduciary)

• Often charge fees based on assets under management (AUM) or flat annual fees, aligning compensation with client outcomes.
• May not earn commissions on specific products if doing so creates unmanageable conflicts.
• Many RIAs prohibit themselves from receiving any compensation other than from clients (i.e., no product commissions at all).

The key is that fiduciary advisers cannot earn compensation in a way that incentivizes unsuitable recommendations.

Enforcement and Liability

Reg BI

Violations are enforced by the SEC through:

• Cease-and-desist orders.
• Fines and disgorgement (repayment of ill-gotten gains).
• Suspension of licensing.

Additionally, customers harmed by Reg BI violations can sue in state or federal court for damages, though the standard of proof is less forgiving than for fiduciary breaches.

Fiduciary Standard

Breaches are enforced by:

• The SEC and state regulators through similar cease-and-desist and fine mechanisms.
• Civil lawsuits for damages, with a lower burden of proof than Reg BI violations.
• Implied private right of action for breach of fiduciary duty (courts recognize clients can sue directly for breach).

A fiduciary breach is often easier to prove and results in higher damages awards because courts view fiduciary duty as a sacred obligation.

Practical Implications for Investors

If you work with a broker (Reg BI):

• The broker is required to give you best-interest advice, but may earn commissions on specific products.
• Ask the broker directly about its compensation structure for each product it recommends.
• Be aware that commissions create potential conflicts, even if managed.
• Reg BI may offer less protection than a fiduciary duty if the broker is clever about disclosure and mitigation.

If you work with a fiduciary adviser (RIA):

• The adviser is legally bound to put your interests first.
• Compensation is typically transparent and aligned with your assets (AUM fee or flat fee).
• Commissions on specific products are rare; if they exist, they require explicit consent and elimination of conflicts.
• A breach of fiduciary duty is a serious matter with significant legal consequences.

The “broker doing advisory” scenario:

Many brokers also provide advisory services. When a broker switches into advisory mode (e.g., a broker-dealer subsidiary offering portfolio management), it becomes a fiduciary and must follow fiduciary standards, not just Reg BI. The firm must clearly separate its advisory services from brokerage services and ensure advisers comply with fiduciary rules.

See also