A market maker is a participant who continuously offers to both buy and sell a contract, earning the spread in return for providing liquidity to the market.
Last reviewed 7 October 2025 · Educational, not advice
A market maker is a participant who stands ready to trade on both sides of a market at the same time, posting a price to buy and a price to sell and keeping both live as conditions change. By doing so they provide liquidity, which means other people can buy or sell without having to wait for a matching counterparty to appear. A market maker can be a dedicated firm, an individual running an automated strategy, or in some venues a built in mechanism, but the role is the same, to be the counterparty that is always there so the market keeps functioning.
The way a market maker is rewarded is the spread, the gap between their buy price and their sell price. If they post a bid at forty seven cents and an ask at fifty, and one trader sells to them at forty seven while another buys from them at fifty, the maker has earned the three cent difference for supplying both sides. That spread is the compensation for the service of being continuously available, and it is also why deep, competitive markets where many makers compete tend to have tighter spreads than thin ones.
Market makers matter because they shape the liquidity you experience as a trader. Where makers are active and competing, the spread is narrow and there is size resting at each price, so you can enter and exit close to the price you saw. Where they are absent or cautious, the spread widens, depth thins out, and trading becomes more expensive and harder to do in size. Much of what feels like a market being easy or difficult to trade comes down to how willing makers are to quote it.
Providing liquidity is not free of risk for the maker, and that risk affects everyone. A maker holds positions while waiting for the other side to trade, so a sharp move on news can leave them on the wrong side at a loss. To protect themselves they widen their spreads or step back entirely when uncertainty rises, which is exactly when liquidity can dry up for you too. A market maker is not a guarantor of a fair price or a safe trade. They are a participant managing their own risk, and their presence can thin out just when you most want to trade.
Suppose a market maker quotes a contract with a bid of forty seven cents and an ask of fifty cents, offering size on both sides. One trader sells to them at forty seven and, a little later, another buys from them at fifty. The maker has bought low and sold high, earning the three cent spread for providing both sides. If news hits and the price jumps before the second trade, though, the maker can be left holding a position at a loss instead.
Illustrative only. Numbers are examples, not a quote or a prediction, and exclude fees.
A market maker's presence can make a market easier to trade but does not make any trade safe, and that liquidity can vanish when news hits. Prediction markets can lose you money. Stake only what you can afford to lose, never to chase a loss, and never on borrowed money. If it stops feeling like a free choice, step back. In the United States you can call or text the helpline on 1-800-GAMBLER or visit ncpgambling.org.
A market maker continuously offers to both buy and sell a contract, keeping a live bid and ask so other people can trade without waiting for a matching counterparty. By always being there to take the other side, the maker provides the liquidity that lets a market function smoothly.
From the spread, the gap between the price they buy at and the price they sell at. If they buy from one trader at the bid and sell to another at the higher ask, they keep the difference as payment for providing both sides. Competition among makers tends to narrow that spread.
Because they shape the liquidity you experience. Where makers compete, spreads are tight and there is size at each price, so you trade close to the price you saw. Where they are scarce or cautious, spreads widen and trading gets more expensive and harder to do in size.
No. A market maker is a participant managing their own risk, not a guarantor. They widen spreads or step back when uncertainty rises, so liquidity can thin exactly when you want it. Their presence does not make a price fair or a trade safe, and we never name a contract to trade.
The rules change fast. Get the changes that affect you, plain and current, not tips.
Independent. Every claim dated and sourced. No platform pays for its place.