How to Read a Best Execution Policy

A policy is a description, not a promise

Firms authorised in Europe and in most comparable regimes must take all sufficient steps to obtain the best possible result for clients when executing orders, and must publish how they intend to do it. That document is the order execution policy. It describes a process; it does not guarantee anything about an individual trade, and reading it as a promise about your fill is the fastest way to be disappointed by it.

It is still worth twenty minutes, because it is the only place a firm has to write down, in advance and in public, things it would otherwise never state: who it deals with, what it optimises for, and what it does when your instruction and its process disagree.

The execution factors, and the order they are ranked in

Every policy lists the factors it weighs: price, cost, speed, likelihood of execution and settlement, size, the nature of the order, and anything else the firm considers relevant. The list is standard. What differs, and what matters, is the ranking and the reasoning attached to it.

Most retail policies say that total consideration — price together with the costs of execution — comes first. Read the sentence after that one. It usually explains the circumstances in which speed or likelihood of execution takes precedence, and those circumstances are exactly the fast, thin, news-driven moments in which people are most likely to be unhappy with a fill.

The venues, and how they were chosen

The policy has to identify the execution venues the firm relies on, or the classes of venue. For a retail CFD account the answer is often short: the firm itself, dealing as principal, with its own liquidity providers behind it. That single sentence tells you more than any marketing page, because it says your counterparty is the firm and not a market.

Then look for how the venues were selected and how often that selection is reviewed. A policy naming its criteria and its review frequency describes a process someone can be held to. One that says only that the firm chooses venues it considers appropriate has told you nothing you can check.

What a specific instruction does to all of the above

Every policy contains a clause saying that where a client gives a specific instruction, the firm will follow it, and that doing so may prevent the firm from taking the steps it has designed to obtain the best result — for the part of the order the instruction covers.

This is not a technicality. Choosing a limit price, a venue or an execution style is a specific instruction. It moves responsibility for that aspect of the outcome from the firm to you, and it is the clause most often cited when a complaint about a fill goes nowhere.

Monitoring, review and consent

Policies describe how the firm monitors its own execution quality and how often the policy itself is reviewed. They also record that by entering into the client agreement you consent to the policy, including any provision for executing orders outside a trading venue. That consent has consequences for who your counterparty is and what happens if it fails, which is a separate question from price and deserves its own attention.

What it cannot tell you

A policy cannot tell you what spread you will pay, what slippage you will receive, or how the firm performed last week. It sets out intentions and constraints. The evidence about your own execution lives in your own records — the timestamps, rejection reasons and fill prices in the platform's history — and comparing that evidence with what the policy said the firm would do is the only test of the document that means anything.