A market maker is a firm that stands ready to buy and sell a market at the same time, quoting two prices all day so that anyone who wants to trade can do so straight away. When you open a trading platform and see one price to sell and a slightly higher price to buy, there is usually a market maker somewhere behind those numbers. Understanding what that firm does, and how it earns its living, explains a great deal about spreads, fills and why prices sometimes behave the way they do.
What market makers actually do
Most of the time, buyers and sellers do not arrive at exactly the same moment. Without someone in the middle, a seller might wait minutes or hours for a matching buyer, and the price could drift a long way in between. A market maker closes that gap by quoting both sides continuously. It will buy from you at its bid and sell to you at its offer, taking the other side of your trade and holding the position until it can offset it elsewhere.
That service is what traders call liquidity. Banks perform it in the foreign exchange market, specialist firms do it in shares, options and futures, and many retail brokers do it for their own clients. Our guide to liquidity in trading explains why deep, well-quoted markets are cheaper and calmer to trade than thin ones.
How a market maker earns money
The main source of income is the spread, the small difference between the buy and sell price. If a firm buys at one price and sells at a fraction higher thousands of times a day, those fractions add up. Our explainer on the bid-ask spread shows how that gap is measured and why it widens and narrows.
The catch is inventory risk. Every time the market maker takes the other side of a trade, it carries a position it did not choose. If prices move sharply before it can hedge, it loses money. That is why spreads widen around big data releases, during thin holiday sessions and when news hits without warning. The firm is not being difficult; it is charging more for the extra danger of quoting into uncertainty.
Market makers and retail brokers
For UK traders using spread bets or CFDs, the broker is often the market maker. It sets its own prices, usually based on the underlying market, and either keeps your trade on its own book or passes the risk on to larger banks and liquidity providers. Other brokers use a model often described as direct market access or straight-through processing, where orders are routed to outside venues and the broker charges a commission instead of building all its income into the spread.
Neither model is automatically good or bad. What matters is transparency, regulation and execution quality. A well-regulated firm should explain how it prices and executes orders, and the FCA expects brokers to act in clients’ best interests when they fill trades. Our guide to choosing a forex broker in the UK covers the questions worth asking.
Common myths
The most persistent myth is that market makers are hunting individual stop losses. A large firm handling flows from banks, funds and thousands of clients is managing aggregate risk, not watching one person’s account. Stops do get triggered in fast markets, but that is usually down to volatility, wider spreads and orders clustering at obvious levels rather than any personal vendetta.
A second myth is that a market maker always wins when you lose. When a broker hedges its book, your profit or loss is largely offset elsewhere and its income still comes mainly from spreads and financing charges. The healthier mindset is to treat the spread as a cost of doing business and to factor it into every plan.
What this means for your trading
Knowing how market makers work leads to a few practical habits. Expect costs to rise when liquidity falls, so be wary of trading the seconds around major releases unless your plan allows for it. Check the spread before you place an order rather than after. Use limit orders where the price matters to you, and understand how slippage can affect market orders in a fast tape. Small costs repeated over hundreds of trades can decide whether a strategy works at all.
Bringing it together
A market maker keeps prices flowing by quoting both sides and taking on short-term risk, and it earns its keep through the spread. Once you see the market through its eyes, wider spreads at awkward moments stop feeling like a conspiracy and start looking like a cost you can plan around.
If you would like to understand how ready you are to manage costs, risk and execution before trading real money, our free trader assessment is a good place to start.
