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Market Maker

Pronunciation: MAR-ket MAY-ker

A firm or individual that continuously quotes both a buy price and a sell price for an asset, profiting from the spread while providing liquidity to other market participants.

Definition

A market maker is a licensed dealer — typically a bank, broker-dealer, or specialist firm — that is obligated or incentivised to continuously post firm bid (buy) and ask (sell) quotes for one or more financial instruments across a trading session. By simultaneously holding an inventory of the asset and quoting both sides of the market, the market maker absorbs imbalances between buyers and sellers. Their primary revenue source is the bid-ask spread: they buy at the lower bid price and sell at the higher ask price, capturing the difference on each round trip. In exchange for this service, market makers receive benefits such as reduced exchange fees, rebates, or privileged access to order flow. Market makers exist across equities, options, foreign exchange, fixed income, and derivatives markets. In over-the-counter (OTC) forex markets, the broker itself often acts as the market maker, internalising client orders rather than routing them to an external exchange.

In plain English — Think of a market maker like a currency exchange booth at an airport. The booth always shows two prices: the rate at which it will buy euros from you, and the (slightly higher) rate at which it will sell euros to you. The gap between those two prices is how the booth makes money. In financial markets, a market maker does exactly the same thing — it stands ready to buy or sell a security at any moment, ensuring that other traders can always find someone on the other side of their trade. Without market makers, you might place an order and wait hours for another human to show up and take the opposite side. Market makers eliminate that wait.

Example

Suppose shares of a fictional company, Acme Corp, are trading around £50.00. A market maker posts a bid of £49.95 and an ask of £50.05 — a spread of 10 pence. Trader A wants to buy 100 shares immediately; she hits the ask and pays £50.05 per share (£5,005 total). Moments later, Trader B wants to sell 100 shares immediately; he hits the bid and receives £49.95 per share (£4,995 total). The market maker has now bought at £49.95 and sold at £50.05, earning the £10 spread. Neither Trader A nor Trader B needed to wait for the other to appear — the market maker bridged the gap. Multiply this by thousands of trades per day and the economics of market-making become clear.

Related terms

Where you see this in the app

Educational content only. Map.Trade does not provide financial advice or trading signals.

Why it matters

Market makers are the plumbing of financial markets. They ensure that when you place a market order it executes almost instantly rather than sitting unfilled for an unknown period. Tight spreads (a sign of active market-making) mean lower transaction costs for every trader. Liquid, tightly-quoted markets also tend to have smaller price gaps overnight and less extreme volatility during normal conditions. For retail traders and prop traders alike, understanding who the market maker is — and whether your broker operates as one — matters for assessing execution quality, potential conflicts of interest, and the true cost of each trade.

Frequently asked questions

Is my retail forex broker likely a market maker?

Many retail forex brokers do operate as market makers, particularly those advertising very tight fixed spreads with no commission. They internalise client orders and take the opposite side of the trade. This is legal and common, but it creates a potential conflict of interest that is worth understanding. Regulated brokers are required to disclose their execution model in their terms and conditions.

Do market makers always profit from the spread?

The spread is the intended profit source, but market makers also carry inventory risk. If they buy shares from a seller and the price drops sharply before they can sell to a buyer, they can lose money on that inventory. This is why market makers widen spreads during volatile events — the wider spread compensates for the increased risk of holding inventory when prices are moving fast.

What is the difference between a market maker and a liquidity provider?

The terms overlap significantly. In institutional contexts, 'liquidity provider' often refers to large banks and prime brokers that supply quotes to ECN platforms, while 'market maker' can refer to an exchange-designated participant with formal quoting obligations. In retail forex, both terms are used loosely to describe any entity quoting continuous two-sided prices. The key function — standing ready to buy and sell — is the same in either case.

Market Maker — Trading Glossary · Map.Trade