The FX Global Code, Explained: Fair Play in a £7.5-Trillion-a-Day Market

A market that needed to earn back trust

Foreign exchange is the plumbing of the global economy. When you buy imported goods, when a pension fund hedges its overseas holdings, when a central bank manages its reserves — currency trades happen underneath. The wholesale market where banks, funds and platforms trade with each other is enormous, fast, and until fairly recently, not especially trusted.

The FX Global Code was launched in May 2017 as a direct response to that lack of trust, which followed a number of misconduct cases and the associated multi-billion dollar fines. The damage ran in two directions: between market participants themselves, and between the public and the market. That mistrust was impairing how the market functioned.

There was a real chance authorities would conclude that heavy regulation was the only fix. Instead, central banks and market participants built something together: a single global set of good-practice principles, developed through a public–private partnership over roughly two years, with input from buy-side firms, sell-side banks, trading platforms, non-bank participants and foreign exchange committees across the world's largest currency centres.

Principles, not a rulebook — and that's deliberate

The Code contains 55 principles covering ethics, governance, execution, information sharing, risk management and compliance, and confirmation and settlement. It is principles-based rather than rules-based, and that choice is the heart of its design.

The reasoning, as set out by the people who built it, is that rules are easier to game than principles. The more prescriptive a code becomes, the less people think about what they're actually doing. A principles-based code forces firms to ask whether their behaviour is consistent with the spirit of the guidance, not just whether it technically clears a fence.

It is also not regulation. It imposes no legal obligations and doesn't replace existing regulatory standards. Firms take the principles and reflect them in their own procedures, in proportion to the size and complexity of their FX activity — a small corporate treasurer and a global bank are not expected to do identical things.

Adherence is signalled publicly through a Statement of Commitment, which firms can post on public registers linked by a global index. Central banks have signed too, and many have said they expect their regular FX counterparties to do the same. Around 1,100 entities globally had signalled adherence by the time of the first full review.

Last look: a quick peek, not a long stare

Here's the idea. In electronic trading, a liquidity provider — typically a bank quoting prices — can receive your trade request and briefly check whether the price is still valid and whether the trade is acceptable before saying yes. That window is called last look.

Used properly, it's a risk control. Used improperly, it becomes something else entirely, and it has generated more debate than any other part of the Code. The guidance is blunt on intent: last look exists for price and validity checks only, and for no other purpose. Checks should be applied without delay, and anything that stretches the window beyond that is contrary to the Code's intent.

Some care is needed with the word "hold time," because the market uses it inconsistently. It can mean the length of the window (which can't be zero — the technology to run checks in literally no time hasn't been invented, so a non-zero window is consistent with the Code), or it can mean a deliberate delay before the check begins (which is not). If someone mentions hold time, it's worth asking which one they mean.

On trading during the window, the Code notes that activity using information from a client's request — including related hedging — is likely inconsistent with good practice. It may signal the client's intent to others and skew prices against them.

Pre-hedging: managing risk, not front-running

Pre-hedging is the management of risk connected to one or more anticipated client orders, designed to benefit the client in connection with those orders. Picture a large order coming your way: you might adjust your position beforehand so you can offer a better price when it lands.

The Code is precise for a reason. The intent must be to benefit the liquidity consumer — the client. Pre-hedging done without that intent, or without regard to market functioning, is not in line with the Code and may constitute illegal front-running. The guidance paper is equally clear that pre-hedging should be the exception, not the norm, and that there's no guarantee it produces a trade, or a trade at a price that benefits the client.

Because expectations matter most with big orders, the emphasis falls on clients and providers aligning on how an order will be handled — whether pre-hedging is used or not.

Information: share colour, protect confidence

The principles on information sharing address an area where participants had long been unsure what was acceptable. Passing on the details of a client's order book is clearly not acceptable. But what level of aggregation is needed to convey useful "market colour" — a sense of flows and sentiment — without leaking something confidential?

The uncertainty had a cost: some participants became so conservative that the market's information flow suffered. The Code sets out what may constitute confidential information, when it should or shouldn't be shared, and with whom.

Related principles ask firms to be clear about the capacity in which they act — as agent, executing for a client without taking on market risk, or as principal, taking on risk and possibly exercising discretion, which should be communicated and exercised fairly rather than in a way designed to disadvantage the client.

Disclosure: the quiet engine of the whole thing

If a code is principles-based, disclosure does much of the heavy lifting. You can't make an informed choice about a counterparty if you can't understand what they do.

Disclosures had improved since 2017, but they varied widely in topic and detail, and the sheer volume became its own problem. The response was standardised Disclosure Cover Sheets for liquidity providers and e-trading platforms — a summary of key topics with links to the underlying documents, and no extra disclosure beyond what the Code already encourages. Firms can post them alongside their Statements of Commitment.

The 2021 update also added templates for algorithmic trading due diligence and transaction cost analysis (TCA — a way of assessing the quality of execution you received), encouraged anonymous platforms to be transparent about data policies and whether their users have signed the Code, and asked firms to explain the basis on which trades might be rejected and to keep records of electronic rejections.

Settlement risk: the unglamorous part that matters

FX settlement carries potentially very significant risk. If you pay out one currency and don't receive the other, the hole can be large. The Code was strengthened to emphasise payment-versus-payment (PVP) mechanisms, where both legs settle together, wherever they're available — and to give more detailed guidance where they aren't.

New language also discourages "strategic fails": deliberately failing to meet payment obligations. That's not a victimless shortcut; it can have systemic consequences for the wider market.

Reviewed every three years

The GFXC, which maintains the Code, reviews it periodically — the first full review concluded in 2021, amending 11 of the 55 principles. Affected firms were generally given up to 12 months to align their practices.

One honest note on limits: the Code is voluntary, and a number of securities regulators — including in the UK, China and Australia — have adopted it as a primary reference for oversight. But how it is recognised and used varies by jurisdiction, and voluntary good practice is not the same as enforceable law. Whether it binds anyone in your situation depends on where you are and who you're dealing with.

Perhaps the most human detail is how it's meant to work day to day. The Code won't answer every question you have. Its job, as its authors put it, is to help you ask the right questions — and then to think about the answers.