Market Makers
The firms that provide liquidity by quoting bid and ask prices.
Market makers are firms or individuals that continuously quote both a bid price (what they will pay to buy) and an ask price (what they will accept to sell) for options contracts. They profit from the difference — the bid-ask spread — while providing liquidity that allows other traders to enter and exit positions immediately. Without market makers, options markets would be illiquid and trading costs would be far higher.
Why It Matters
Every time you buy or sell an option, a market maker is almost certainly on the other side of your trade. Understanding how market makers operate helps you trade more efficiently. They are not betting against you directionally — they are hedging every position they take and profiting from the spread and from managing their aggregate risk.
Market makers influence the prices you see, the spreads you pay, and how quickly your orders fill. When markets are calm, spreads are tight and fills are fast. When markets are volatile, market makers widen spreads to compensate for increased risk. Knowing this helps you time your orders and set realistic price expectations.
How It Works
What market makers do:
- Quote continuous two-sided markets (bid and ask) across thousands of options series
- Hedge their inventory in real-time by trading the underlying stock, other options, or related instruments
- Manage portfolio Greeks (delta, gamma, vega, theta) across all their positions
- Profit primarily from the bid-ask spread and from volatility risk premium
How the business model works: A market maker buys an option at the bid and sells it at the ask. If the bid is $2.00 and the ask is $2.10, they capture $0.10 per share on a round trip. To prevent directional risk, they immediately hedge the delta by trading stock. Over thousands of trades per day, these small spreads add up to significant revenue.
Delta hedging in practice: When a market maker sells you a 50-delta call, they buy 50 shares of stock to neutralize their directional exposure. As the stock moves and delta changes, they continuously adjust their hedge — buying more shares as the stock rises and selling as it falls. This constant rebalancing is the core of market making.
What affects market maker behavior:
- Volatility: Higher volatility means more hedging risk, so spreads widen
- Inventory imbalance: If too many customers are buying calls, the market maker may raise ask prices
- Event risk: Before earnings or major events, spreads widen as uncertainty increases
- Competition: More market makers in a product generally means tighter spreads
Market makers and the volatility risk premium: Because options are priced off implied volatility (which historically exceeds realized volatility), market makers who sell options and delta-hedge tend to capture this premium over time. This structural edge is a key part of their profitability.
Quick Example
You want to buy the $100 call on stock XYZ. The market maker quotes: bid $3.00, ask $3.20. You buy at $3.20. The market maker is now short a 50-delta call. They immediately buy 50 shares of XYZ at $100 to hedge.
If the stock rises to $101, their short call loses about $0.50 (delta), but their 50 shares gain $0.50 — roughly flat directionally. Their profit comes from the $0.20 spread they captured. If they do this 1,000 times a day across different contracts, that $0.20 per trade generates substantial revenue.
When the VIX spikes from 15 to 30, the same spread might widen from $0.20 to $0.60. The market maker charges more because the risk of their hedge being insufficient has increased.