--- title: "Market Maker | Intro to Business" description: "Market Maker in Intro to Business means a buyer-seller who quotes both sides of a security market to add liquidity and keep trades moving." canonical: "https://fiveable.me/intro-to-business/key-terms/market-maker" type: "key-term" subject: "Intro to Business" unit: "Unit 16" --- # Market Maker | Intro to Business ## Definition A market maker is a firm or person that continuously quotes both a buy price and a sell price for a security. In Intro to Business, it shows how stock markets stay liquid and trades get completed. ## What It Is A market maker in Intro to Business is a person or firm that stands ready to buy and sell a security at quoted prices. The basic job is simple: keep a two-sided market open so traders can complete orders even when no natural buyer and seller match right away. That matters because securities markets do not work smoothly if everyone has to wait around for the perfect match. If you want to sell a stock right now, a market maker can buy it from you. If you want to buy, the market maker can sell it to you. That constant presence makes trading faster and less frustrating for investors. Market makers make money from the bid-ask spread, which is the gap between the price they are willing to buy at and the price they are willing to sell at. For example, if they quote a bid of $49.90 and an ask of $50.00, that 10-cent spread is part of how they earn compensation for taking on risk. They may end up holding inventory of a stock that drops in value before they can resell it. In a business course, the key idea is not just the definition, but the function. Market makers help create liquidity, which means securities can be bought and sold without huge delays or price swings caused by a thin market. When more than one market maker covers the same security, competition can tighten the spread and make trading cheaper for investors. You will also see that market makers adjust to conditions. In a calm, active market, spreads may be narrow. In a fast-moving or volatile market, they may widen the spread because the risk of holding inventory rises. That is why market makers are tied to market structure, investor costs, and how exchanges keep trading orderly. ## Why It Matters Market maker is one of the clearest examples of how securities markets actually function, not just how they are named on paper. In Intro to Business, it connects finance concepts like liquidity, pricing, and risk to the real process of buying and selling stocks. This term also helps explain why exchanges and trading systems are set up the way they are. A market with too little liquidity can be slow, expensive, and jumpy. A market maker reduces that problem by posting quotes and taking the other side of trades, which keeps activity moving even when regular investors are not perfectly matched. It also gives you a concrete way to talk about spread costs. When you see the bid-ask spread in a question or case, you can connect it to the market maker’s compensation and the risk they take on. That makes the term useful in discussions of trading costs, market efficiency, and why some securities are easier to trade than others. This concept shows up naturally alongside exchanges like the NYSE and NASDAQ, especially when comparing auction-style trading to dealer-style support and electronic trading. If you can explain what market makers do, you can explain a big piece of how modern capital markets stay functional. ## Connections ### Bid-Ask Spread The bid-ask spread is the gap between what a buyer will pay and what a seller will accept. Market makers earn this spread as compensation for supplying liquidity and taking inventory risk. If a spread gets wider, it usually means trading is riskier or less active. ### Liquidity Liquidity is how easily an asset can be bought or sold without a big price change. Market makers increase liquidity by being ready to trade on both sides of the market. That is why stocks with active market makers are often easier to trade than thinly traded securities. ### [Dealer Market](/intro-to-business/key-terms/dealer-market) A dealer market is a market structure where dealers quote prices and stand ready to buy and sell securities. Market makers are the people or firms doing that job. This is useful when comparing different exchange systems and understanding who actually makes trades possible. ### Order Book An order book lists buy and sell orders for a security. Market makers often interact with the order book by posting quotes that help fill gaps between buyers and sellers. When an order book is thin, market makers matter even more because they help keep trades moving. ## On the AP Exam A quiz question might ask you to identify who provides liquidity in a stock market, or to explain why a bid-ask spread exists. In those items, you would say that market makers quote both a bid and an ask, then earn the spread for taking on inventory risk. If a case study describes a stock that is hard to trade because buyers and sellers are not lining up, market maker is the term that explains how trading still happens. You may also be asked to compare market makers with exchanges or with electronic trading systems. The move is to focus on the function, not just the label: market makers help execute trades and stabilize activity, especially when markets are thin or volatile. If the question mentions wider spreads during uncertainty, connect that to higher risk for the market maker. ## Market Maker vs Dealer Market A dealer market is the overall market structure where dealers quote prices. A market maker is the individual firm or person doing that quoting and trading. So the dealer market is the system, while the market maker is one of the participants that keeps the system working. ## Key Takeaways - A market maker is a firm or person that continuously quotes both a buy price and a sell price for a security. - Market makers make trading easier by providing liquidity, which means investors can buy or sell without waiting for a perfect match. - They earn the bid-ask spread, and that spread helps pay them for the risk of holding inventory. - When markets get volatile, market makers may widen spreads because the price can move against them more quickly. - In Intro to Business, market makers are a simple way to see how market structure affects trading costs and market efficiency. ## FAQs ### What is a market maker in Intro to Business? A market maker is a financial firm or individual that is willing to buy and sell a security at quoted prices. Their job is to keep trading active by making sure there is usually someone on the other side of a trade. ### How does a market maker make money? A market maker usually earns the bid-ask spread, which is the difference between the price they buy at and the price they sell at. That spread is their compensation for providing liquidity and taking on the risk of price changes. ### What is the difference between a market maker and a dealer market? A dealer market is the trading system, and a market maker is the participant who quotes prices in that system. If you mix them up, remember that the market is the setting and the market maker is the one doing the buying and selling. ### Why would a market maker widen the spread? If prices are moving fast or trading feels risky, a market maker may widen the spread to protect against losses. A wider spread can also show that a security is less liquid or harder to trade. ## Related Study Guides - [16.7 Buying and Selling at Securities Exchanges](/intro-to-business/unit-16/7-buying-selling-securities-exchanges/study-guide/wY4S3LCPJvXkvbzl) ## About This Document Canonical Fiveable pages are available as Markdown at the same path plus `.md`. - [llms.txt](https://fiveable.me/llms.txt): index of Fiveable's sections and URL patterns - [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing - [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`) - [MCP server for AP teachers](https://fiveable.me/mcp/teachers): a teacher's classes, assignments and AP-rubric grading (`https://fiveable.me/api/mcp/teacher`) ## Structured Data ```json {"@context":"https://schema.org","@graph":[{"@type":"LearningResource","@id":"https://fiveable.me/intro-to-business/key-terms/market-maker#resource","name":"Market Maker | Intro to Business","url":"https://fiveable.me/intro-to-business/key-terms/market-maker","learningResourceType":"Concept explainer","educationalLevel":"AP® / High School","about":{"@id":"https://fiveable.me/intro-to-business/key-terms/market-maker#term"},"audience":{"@type":"EducationalAudience","educationalRole":"student"},"dateModified":"2026-07-03T02:22:40.029Z","isPartOf":{"@type":"Collection","name":"Intro to Business Key Terms","url":"https://fiveable.me/intro-to-business/key-terms"},"publisher":{"@type":"Organization","name":"Fiveable","url":"https://fiveable.me"}},{"@type":"DefinedTerm","@id":"https://fiveable.me/intro-to-business/key-terms/market-maker#term","name":"Market Maker","description":"A market maker is a firm or person that continuously quotes both a buy price and a sell price for a security. 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