What does a probability and market-making interview focus on?

Probability, expected value, and fast mental math, often wrapped in betting-game and quoting scenarios. Interviewers care about clear reasoning under uncertainty as much as the final number.

How should I prepare for this format?

Build probability and EV fluency, practise thinking out loud, and get comfortable quoting and updating prices. Working a large, varied question set with worked solutions is the most reliable approach.

Do I need a finance background?

Usually not. These rounds test probabilistic reasoning and decision-making rather than finance vocabulary, so a background in maths, physics, CS, or engineering is a fine starting point.

Probability & Market-Making Interview Questions

Probability-and-market-making interviews centre on expected value and fast mental arithmetic, wrapped in betting-game and quoting scenarios that test how you price and manage risk under uncertainty.

Expect to reason out loud through probability and expected-value problems, price simple betting games, and rattle off quick mental arithmetic - frequently with a market-making twist where you quote a fair price and update as new information arrives. Coding and data-analysis questions appear for technology and research roles.

Rounds of this kind typically care as much about your method as your final answer. Prior finance knowledge is rarely assumed; what is being sampled is how you handle uncertainty, so practise narrating your reasoning rather than only producing a number.

398 questions tagged to Probability & Market-Making · 276 free to practise now.

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Topics:Probability Combinatorics Brainteasers Expected Value Random Variables Stochastic Processes

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Frequently asked questions

What does a probability and market-making interview focus on?: Probability, expected value, and fast mental math, often wrapped in betting-game and quoting scenarios. Interviewers care about clear reasoning under uncertainty as much as the final number.
How should I prepare for this format?: Build probability and EV fluency, practise thinking out loud, and get comfortable quoting and updating prices. Working a large, varied question set with worked solutions is the most reliable approach.
Do I need a finance background?: Usually not. These rounds test probabilistic reasoning and decision-making rather than finance vocabulary, so a background in maths, physics, CS, or engineering is a fine starting point.