Market Maker: Definition, Role, and Function in Digital Asset Trading

Definition

A market maker is a firm or individual that continuously quotes both buy (bid) and sell (ask) prices for a financial instrument, standing ready to trade at those prices. By providing persistent two-sided liquidity, market makers facilitate trading for other participants, reduce the cost of transacting, and improve overall market quality.

In digital asset markets, market makers perform the same fundamental function as their counterparts in traditional equities and fixed-income markets, but they operate in an environment characterised by 24/7 trading, fragmented venues, and significantly higher volatility.

How Market Making Works

A market maker simultaneously posts a bid price (the price at which it will buy) and an ask price (the price at which it will sell) on an exchange’s order book. The difference between these two prices — the bid-ask spread — represents the market maker’s gross profit per unit traded.

For example, if a market maker quotes Bitcoin at CHF 95,000 bid and CHF 95,050 ask, it earns CHF 50 per Bitcoin on a complete round trip (buying at the bid and selling at the ask). In practice, market makers rarely complete perfect round trips; instead, they accumulate inventory as market conditions fluctuate and must manage the resulting directional exposure.

Inventory Management

Market makers must continuously manage their inventory — the net position that accumulates through their quoting activity. When more participants are buying than selling, the market maker becomes short; when more are selling, it becomes long. Effective inventory management requires:

• Adjusting quotes to attract flow that reduces accumulated positions
• Hedging inventory risk through correlated instruments or other venues
• Setting position limits that prevent dangerous accumulation
• Dynamically widening spreads during volatile periods to compensate for increased risk

Revenue Sources

Market maker revenue derives from:

• Bid-ask spread capture — The core revenue source, earned through providing two-sided liquidity
• Maker rebates — Many exchanges pay rebates to liquidity providers who post resting orders
• Statistical arbitrage — Exploiting temporary price discrepancies across venues
• Signal-based alpha — Some market makers incorporate directional views into their quoting strategies

Market Makers in Crypto vs Traditional Markets

Fragmentation

Traditional equity market makers typically focus on a single exchange or a small number of venues. Crypto market makers must operate across dozens of exchanges simultaneously, each with different API infrastructure, fee structures, and latency characteristics. This fragmentation increases operational complexity but also creates opportunities for cross-venue arbitrage.

Volatility

Digital asset volatility is substantially higher than in most traditional markets. This means wider spreads are necessary to compensate market makers for the risk of holding inventory through large price moves. During extreme volatility events, market makers may withdraw liquidity entirely, exacerbating price dislocations.

24/7 Operations

Unlike traditional markets with defined trading hours, digital asset markets operate continuously. Market makers must maintain quoting operations around the clock, requiring robust infrastructure, automated systems, and distributed teams.

Regulatory Framework

In traditional markets, designated market makers often have formal obligations to maintain continuous quotes within defined parameters. In crypto markets, market making is largely unregulated, with obligations established through commercial agreements between market makers and exchanges or token issuers.

In Switzerland, market making activities may trigger securities dealer licensing requirements depending on the nature of the assets traded and the market maker’s operational structure.

Market Maker Designations

Some exchanges operate formal market maker programmes that provide incentives in exchange for liquidity commitments:

• Fee reductions — Lower trading fees or enhanced maker rebates
• Dedicated support — Priority API access and technical support
• Colocation — Access to low-latency infrastructure near exchange matching engines
• Market data — Enhanced market data feeds

In return, designated market makers commit to maintaining quotes within defined spread and size parameters for specified percentages of the trading day.

Impact on Market Quality

Market makers directly influence several measures of market quality:

Spread — Active market making narrows bid-ask spreads, reducing transaction costs for all participants.

Depth — Market maker quotes add depth to the order book, enabling larger trades with less slippage.

Resilience — Market maker activity helps prices recover quickly from temporary dislocations caused by large orders.

Price discovery — By incorporating information from multiple sources and venues, market makers contribute to efficient price discovery.

Automated Market Makers

The rise of decentralised exchanges has introduced automated market makers (AMMs) — smart contract-based systems that provide liquidity through algorithmic pricing rather than human-managed order books. While AMMs serve a similar economic function to traditional market makers, they operate through fundamentally different mechanisms and cater primarily to the decentralised trading segment.

Risks of Market Making

Market making in digital assets carries significant risks:

• Inventory risk — Holding large positions during adverse price moves can generate substantial losses
• Adverse selection — Trading against better-informed counterparties who consistently trade ahead of price movements
• Technology failure — System outages can leave stale quotes in the market, exposing the maker to significant losses
• Exchange risk — Assets held on exchanges for market making are subject to exchange counterparty risk
• Regulatory risk — Changes in regulatory treatment could affect the viability of market making operations

Donovan Vanderbilt is a contributing editor at ZUG TRADING, a digital asset trading and exchanges intelligence publication by The Vanderbilt Portfolio AG, Zurich. His analysis covers institutional market structure, OTC liquidity, and regulatory developments across Swiss and global digital asset markets.