Wholesale FX is the part of the foreign exchange market in which banks, dealers, asset managers, large corporates and other institutions trade currencies with one another, usually in large amounts and at prices close to the market mid-rate. It is where exchange rates are actually formed, and it supplies the liquidity that banks, money transfer operators and payment companies later resell to their own customers.
The term is used in contrast with retail FX, the conversion offered to individuals, small businesses and smaller payment firms, which is priced with a wider FX spread or an explicit FX markup. Wholesale FX is largely an over-the-counter (OTC) market rather than an exchange, and its conduct is guided by the voluntary FX Global Code maintained by the Global Foreign Exchange Committee.
Wholesale FX in plain terms
Wholesale FX works much like a food market before dawn. Restaurants and grocers buy crates of vegetables from farmers and large traders at low prices because they buy in bulk and pay reliably. Later in the day, shoppers buy a single bag of the same vegetables at the corner shop, paying more for the convenience of a small quantity.
Currencies are traded the same way. Big banks and institutions exchange very large amounts with each other at close to the true market price. Smaller customers buy the same currency in small pieces, and each layer of middlemen between them and that early market adds a little to the price they pay.
Who takes part and how trading happens
The core of the market is a group of large dealer banks that quote two-way prices to each other and to clients. Around them sit regional banks, non-bank liquidity providers and electronic market makers, hedge funds and asset managers, corporates and central banks. Smaller banks and payment firms often reach this market through a prime broker, which lends them its name and credit lines.
Trading takes place on inter-dealer platforms, multi-dealer request-for-quote venues and single-bank portals, as well as by voice. The main instruments are spot transactions at the spot rate, forward contracts and FX swaps, which combine a spot and a forward leg. The settlement of many of these trades runs through Continuous Linked Settlement (CLS), which settles both currencies together on a payment-versus-payment basis to remove Herstatt risk.
According to the BIS Triennial Survey, global FX turnover averaged about $9.6 trillion a day in April 2025, up 28% from 2022. The US dollar was on one side of about 89% of all trades, and FX swaps were the largest instrument at about $4 trillion a day.
How wholesale pricing reaches smaller firms
The price a firm gets depends on its size, its credit standing and how much information its orders carry. A large, regular, creditworthy counterparty sees tight spreads in liquid pairs. A small firm converting a less-traded emerging-market currency may see a much wider spread, or no direct price at all.
The cost of a markup over the wholesale mid-rate can be measured as:
- is the amount converted, in the source currency.
- is the rate the customer is given.
- is the wholesale mid-market rate at the time of the trade.
For example, a payment company converting $1,000,000 when the mid-rate is 7.80 Hong Kong dollars per US dollar, and receiving 7.77, pays a markup of 0.03 ÷ 7.80, or about 0.38%. That is roughly $3,846 on one conversion. Repeated every week, such gaps explain why smaller firms seek better access through an FX aggregator, a tiered pricing agreement or direct dealer relationships.
Wholesale FX in cross-border payments
For a money transfer operator (MTO) or payment provider, wholesale FX is the cost of goods sold. The difference between the rate it buys at and the rate it gives customers is often its main source of revenue. Access matters most in corridors where dollar liquidity is scarce, where an official exchange rate differs from a parallel market rate, or where capital controls limit who can buy foreign currency.
New settlement models such as payment backhaul change how value moves between countries but do not remove the need for conversion at each end. Providers that combine wholesale FX with local collection and reliable payouts can capture both the conversion margin and the transfer fee.
Conduct and oversight
Wholesale FX is less directly regulated than exchange-traded markets, but it is not unsupervised. Dealer banks are supervised as banks, many jurisdictions regulate FX derivatives, and the FX Global Code, first published in 2017 after rate-rigging scandals, sets principles on execution, information sharing, the use of "last look" and pre-hedging. Market participants sign statements of commitment to it.