Best Execution: Compare Total Client Value, Not Just Commission

Best execution is not a promise that every trade gets the lowest displayed commission or a perfect fill. It is a process for seeking the most favorable overall execution for clients under the circumstances, when the adviser is responsible for choosing the broker.

Total cost or proceeds is the focus

The SEC’s fiduciary interpretation describes an adviser’s duty to seek execution such that the client’s total cost or proceeds are most favorable under the circumstances. The relevant measure is broader than a commission. Execution price, likelihood and speed of execution, market impact, execution capability, and the services the broker provides can all matter to value.

Evaluate the broker as a whole

The SEC identifies factors such as execution capability, commission rate, financial responsibility, responsiveness, and research value. Which factors matter most can differ across trades and clients. An adviser should evaluate the circumstances rather than simply route every order to the cheapest broker or the broker offering the most attractive research package.

Conflicts and soft dollars require attention

Research or other benefits may create incentives that affect broker selection. The adviser must address material conflicts and provide appropriate disclosure. A client benefit does not automatically justify higher trading costs, and disclosure alone does not turn a poor execution process into best execution. Maintain a process to review broker quality and reassess arrangements as markets, services, and client needs change.

What a sound process looks like

1. Identify who is responsible for selecting brokers and routing the order.
2. Define the execution factors relevant to the strategy and client account.
3. Compare broker performance and services using reasonable, documented criteria.
4. Consider commission, price, execution quality, market impact, financial stability, responsiveness, and any research benefit.
5. Identify conflicts, disclose and manage them, and periodically review whether the arrangement still serves clients.

Specific client instructions

A client may direct an adviser to use a particular broker or impose trading restrictions. The adviser should explain how a direction can affect execution and costs and follow the applicable agreement and fiduciary obligations. A directed-brokerage instruction does not make the adviser responsible for factors the client has expressly controlled, but it does not eliminate the need for clear disclosure and sound handling of the remaining responsibilities.

Build and document a review process

An adviser that selects brokers should periodically evaluate execution quality across relevant transactions and compare available alternatives. Review price improvement, execution speed, likelihood of execution, market impact, commission and spread, liquidity, confidentiality, settlement reliability, and financial responsibility. A broker offering the lowest commission may not provide the most favorable overall outcome.

The review should reflect the adviser’s trading strategy and client accounts. A small-cap illiquid order has different execution needs from a liquid exchange-traded fund. Compare like transactions and document the methods, data limitations, and conclusion. A one-time broker review at onboarding is not enough if service or market conditions change.

Soft-dollar research or other benefits can create incentives to route trades to a broker that is not best for the client. Section 28(e) has a limited safe harbor for qualifying research and brokerage services, but it does not eliminate the adviser’s fiduciary duty or disclosure obligations. Identify who pays, what the client receives, and whether the arrangement distorts broker selection.

Client-directed brokerage may limit the adviser’s ability to control execution. Explain the consequences, including potentially higher costs or reduced execution quality, and document the client’s instruction. Do not represent that the adviser obtained best execution if the client’s direction prevented a meaningful broker choice.

A practical annual file includes broker-selection criteria, execution reports, trade samples, conflict review, client disclosures, and remediation. Escalate material concerns such as persistent poor fills, undisclosed routing incentives, or a broker relationship that is no longer financially sound.

Best execution is a duty to seek the most favorable total cost or proceeds under circumstances, not a guarantee that each trade will hit the market’s best displayed price.

Key takeaway

Best execution means seeking favorable total value for the client. Commission is one factor among price, execution quality, capability, reliability, responsiveness, and research or other services.