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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.

Intermediate3 min readUpdated 3 Oct 2026
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Lesson 31 of 44

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#

ActivityDescriptionLesson
Quote pricesContinuously post bids and offersMarket Making
Manage inventoryAvoid building too large a position in one directionMarket Makers and Liquidity Providers
Hedge riskOffset exposures with related instrumentsHedging
Adjust to flowWiden or move quotes when informed traders appearFill Probability and Queue Position
Monitor systemsSupervise automated quoting algorithmsAlgorithmic Trading Explained

Options market making#

Options traders manage a book of many options with different strikes and expiries. They think in Greeks:

GreekRisk it measuresLesson
DeltaExposure to the underlying priceDelta
GammaHow delta changes as price movesGamma
VegaExposure to implied volatilityVega
ThetaTime decayTheta

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:

FormatTests
Mental maths testsSpeed and accuracy under time pressure
Probability puzzlesExpected value and conditional probability. See Conditional Probability
Market making gamesQuoting a two sided market on an uncertain quantity and adjusting as information arrives
Betting and sizing gamesRisk management and position sizing. See Kelly Criterion
Behavioural interviewsHandling 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#

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.

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Next lessonFX, Rates, Credit and Commodity TradersWhat FX, rates, credit and commodity traders do at banks, funds and trading houses: their markets, daily drivers, skills and how these macro trading roles differ.

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