What Is a Market Maker?
A market maker is a participant that provides liquidity to a market by simultaneously placing buy (bid) and sell (ask) orders. They profit from the bid-ask spread — buying at the bid and selling at the ask. Major crypto market makers include Jump Trading, Wintermute, and Alameda (formerly).
How Market Making Works
Market makers maintain continuous two-sided quotes on an order book. When a trader places a market order, they execute against the market maker's resting limit orders. The market maker earns the spread on each round-trip trade. They manage inventory risk by dynamically adjusting quotes based on position, volatility, and market conditions.
Why It Matters for Traders
Market makers are why liquid markets exist. Their presence determines spread tightness and order book depth. Understanding market maker behavior helps traders interpret order book dynamics — large bid walls, spoofing patterns, and spread changes all reflect market maker positioning. When market makers pull quotes (reduce liquidity), volatility typically spikes.