Market Maker and Options Trader
Market makers quote prices on both sides and manage the risk they take on. Learn what market making and options trading roles involve, key skills and interviews.
Market makers stand ready to buy and sell, quoting both a bid and an ask, and earn money from the spread while managing the risk of the positions they accumulate. Options market makers do this across thousands of option contracts, pricing them with models and hedging their exposure to price moves, volatility and time. These roles are found at electronic trading firms, proprietary trading firms and banks, and they are known for intense training, fast decision making and a heavy focus on probability.
What a market maker does#
| Activity | Description | Lesson |
|---|---|---|
| Quote prices | Continuously post bids and offers | Market Making |
| Manage inventory | Avoid building too large a position in one direction | Market Makers and Liquidity Providers |
| Hedge risk | Offset exposures with related instruments | Hedging |
| Adjust to flow | Widen or move quotes when informed traders appear | Fill Probability and Queue Position |
| Monitor systems | Supervise automated quoting algorithms | Algorithmic Trading Explained |
Options market making#
Options traders manage a book of many options with different strikes and expiries. They think in Greeks:
| Greek | Risk it measures | Lesson |
|---|---|---|
| Delta | Exposure to the underlying price | Delta |
| Gamma | How delta changes as price moves | Gamma |
| Vega | Exposure to implied volatility | Vega |
| Theta | Time decay | Theta |
They typically hedge delta continuously and manage gamma and vega across the book, aiming to profit from the spread and from pricing volatility well. See Delta Hedging and The Option Greeks Explained.
Skills firms look for#
- Probability and expected value thinking. See Expected Value.
- Fast mental arithmetic.
- Decision making under uncertainty with incomplete information.
- Risk discipline: knowing when to reduce exposure.
- Teamwork and communication on a busy desk.
- Programming, increasingly important as quoting is automated.
Interviews#
Market making interviews are known for:
| Format | Tests |
|---|---|
| Mental maths tests | Speed and accuracy under time pressure |
| Probability puzzles | Expected value and conditional probability. See Conditional Probability |
| Market making games | Quoting a two sided market on an uncertain quantity and adjusting as information arrives |
| Betting and sizing games | Risk management and position sizing. See Kelly Criterion |
| Behavioural interviews | Handling pressure and losses |
Training and career path#
Many firms run training programs lasting several months, teaching options theory, the firm's systems and simulated trading before traders handle live risk. Traders often progress from assisting on a desk to managing their own products and eventually larger books, or move into research, strategy or management roles. See Trading Careers Explained.
Challenges#
- Adverse selection: losing to better informed traders.
- Intense competition with tight spreads.
- Sudden volatility that can cause large losses on unhedged risk. See Volatility Crush and Expansion.
- Technology dependence: systems must be fast and reliable. See Risk Controls and Kill Switches.
Frequently asked questions#
What does a market maker do?#
Quotes prices to buy and sell continuously, earning the bid ask spread while managing and hedging the positions taken on.
What skills do options traders need?#
Strong probability and mental maths, understanding of option pricing and the Greeks, risk discipline and quick decision making.
How do market makers make money?#
Mainly by capturing the spread across many trades and managing risk well, rather than betting on market direction.
Next, learn about macro asset class trading roles in FX, Rates, Credit and Commodity Traders.
3 quick questions on this lesson. Get them all right to finish it.
Turn on JavaScript to take the quiz.
Mentioned in
- Trading DesksThe Trading Industry
- Trading Careers ExplainedThe Trading Industry
- Prop TraderThe Trading Industry
- Execution and Sales TraderThe Trading Industry