Quant Trader Interview Questions & Prep (2026 Guide)

Quant trader interviews screen for fast, accurate decisions under uncertainty. For most candidates they start with a timed mental-math test that ends the process before any trader conversation. This guide collects real quant trader interview questions from 2025 and 2026 and shows how the rounds differ from firm to firm. You'll get a framework for the market-making exercise and a plan for the weeks before your interview.

What is a quant trader interview?

A quant trader interview tests how you price uncertainty and make bets in real time. That separates it from the 2 loops you might confuse it with: quant researchers get tested on statistics and modeling, and quant developers get tested on C++ and low-latency systems. If you're interviewing for a trading seat, confirm the track early, because preparing for the wrong loop is a common and avoidable mistake.

Across most market makers, the process runs in a standard order. You'll take a timed online assessment covering mental math, probability, or both, then a recruiter or phone screen, then technical rounds with traders. An onsite or Superday closes the loop with a trading simulation and a behavioral conversation. The exact order and round count vary by firm, and one firm's format doesn't generalize to the rest.

What's changed in quant trader interviews in 2026

The quant trader rubric has shifted toward automated, timed screenings that happen before any human reads your application. Firms score speed and accuracy first, and they evaluate your reasoning only after you pass the screen.

Timed automated assessments come first at almost every firm

For most market makers, a timed test now comes before any human contact. Firms like Optiver, Akuna, IMC, DRW, and Citadel Securities all screen with a timed mental-math, probability, or cognitive test first. Raw arithmetic speed decides who advances. Prepare it as its own track with dedicated daily practice.

Gamified cognitive testing at IMC

IMC replaced part of its screen with a set of cognitive tests it calls NeurOlympics. These score decision-making and attention profiles, which daily arithmetic practice alone doesn't cover.

Trading simulations at the final round

DRW, IMC, and CTC increasingly run a live trading simulation at the Superday. These rounds evaluate quoting and risk-taking in real time. You can solve every puzzle on paper and still fail the round if you freeze when an interviewer trades against you.

Jane Street keeps every screening round human

Jane Street skips automated screening entirely. A person reads every application, and the technical rounds run as betting and strategy questions asked out loud. Every other firm in this guide screens with a timed test first.

Quant trader interview questions by category

Quant trader questions cluster into 5 categories: probability and expected value, mental math and estimation, market-making exercises, brainteasers and logic, and behavioral fit.

Probability and expected value

Probability and expected value are the core of the trader loop, so plan to compute expected value, reason about conditional probability, and defend a bet.

Prepare for prompts like:

• A recursion and expected-value question about a frog jumping either 1 or 2 steps forward at a time.
• A two-card ace/queen Bayesian betting exercise: with what probability should you raise if you hold an ace, and with what probability if you hold a queen, given the opponent knows your strategy.
• The expected number of coin flips until 2 heads in a row, dice expected-value questions, gambler's ruin, and conditional probability with Bayes.

Mental math and estimation

The timed mental-math screen scores accuracy per second, so speed matters as much as method.

Expect questions like:

• Mid-interview arithmetic questions such as "What is 7 times 14?" and "What is the square root of 225?"
• The Optiver and Akuna "80 in 8" timed screens, taken without a calculator.
• Fermi estimation, such as estimating how many windows the Empire State Building has (and how confident you are), or the number of gas stations in California.

Market-making and trading exercises

The market-making exercise decides more trader loops than any other round.

Expect exercises like:

• "I'm thinking of a number between 1 and 100. Make a market on it." Fair value is 50.5; you quote a spread, and the interviewer trades against you.
• A "pennies on a round table" combinatorial exercise against the interviewer.
• IMC runs a trading simulation built on an order book, and DRW and CTC run trading sims at the Superday.

How interviewers score the make-a-market question:

Question: "Make a market on a number between 1 and 100."

• What it tests: Whether you can set a fair value, quote a two-sided market, and manage being traded against
• How long it takes: 5 to 10 minutes, usually with follow-ups as the interviewer trades
• What the interviewer wants: A fair value near 50.5, a spread sized to your confidence, and updated quotes as new information arrives
• Good vs. great: A good answer quotes a sensible two-sided market. A great answer widens the spread when uncertainty is higher and tightens it when confident. It also adjusts after each trade to limit adverse selection.

Brainteasers and logic

Brainteasers test structured reasoning more than finance knowledge. State your method before you give your answer.

Practice with questions like:

• "You have 8 marbles; one weighs more than the others. What is the minimum number of weighings to find it?"
• Common SIG assessment topics include gambler's ruin, random walks, path and grid combinatorics, single-variable calculus optimization, sequences, and deductive logic.

Behavioral and fit

Behavioral rounds check temperament as much as history, and interviewers typically read competitiveness as a signal in your favor.

Expect prompts like:

• "What is your proudest project?" alongside an assessment of how competitive and assertive you are.
• SIG interviews ask about strategic-games background (poker, chess) and "why trading, why this firm."
• CTC is unusually behavioral-heavy, with prompts like describing a time you disagreed with someone.

Quant trader interviews by firm

The trader loop looks different at each firm. The 2 biggest differences are whether the firm runs a timed math screen and how much the market-making exercise counts for.

Five Rings opens with an assessment of 19 math questions where close answers count. Technical trader rounds follow, then a round with the Head of Trading and a round with a founder. CTC opens with an aptitude assessment covering verbal, numerical, and diagrammatic reasoning across 3 timed sections, then a recorded video and a phone screen.

CTC closes with "Superweek" in Chicago: a half-day trading simulation and around 6 one-on-ones. It asks more behavioral and values questions than the other market makers here. Jump Trading runs both trader and developer loops, so confirm which one you're in, and expect the trader assessment to cover probability, expected value, and market microstructure across roughly 90 to 120 minutes. Citadel Securities screens trading interns with its Financial Concepts Assessment (FCAT) and trades a broad set of products.

Jane Street

Jane Street reviews applications manually and doesn't run a timed test. The technical rounds run as betting and strategy questions asked out loud. Expect an application review, 2 to 3 conversational phone interviews, and a full-day final round with traders and HR.

Jane Street scores your reasoning process more than your recall, so narrate how you update as the exercise changes. Loop length varies: a 2026 Hong Kong trader loop ran to 8 rounds. Jane Street also discourages people from discussing specifics, so expect questions you won't find in any public list.

Optiver

Optiver's "80 in 8" mental-math screen comes before everything else, and every later round depends on passing it. You may be given a week to complete 5 online assessments before any trader speaks with you.

The commonly cited pass mark is around 56 out of 80, with wrong answers scored against you, though Optiver publishes neither figure. Guessing costs you points, so train for accuracy at pace. Later rounds add probability, options pricing theory, market-making simulations, and trading games.

SIG (Susquehanna)

SIG runs an assessment, then a 30-to-45-minute phone screen with a recruiter or a junior trader. Deeper rounds on probability, market-making, and decision theory follow, then a Superday. Offers usually arrive 1 to 2 weeks after the Superday.

SIG tests decision theory more than most market makers do. The firm employs World Series of Poker bracelet winners Bill Chen and Jerrod Ankenman, who co-wrote The Mathematics of Poker. Chen also heads SIG's statistical arbitrage group. Poker itself is post-hire training, and no part of the interview tests it, so expect expected-value framing instead of card play.

IMC

IMC opens with NeurOlympics, a 45-minute set of cognitive tests, alongside a math and probability component. A recruiter behavioral round follows, then 2 back-to-back trader technical interviews.

The Superday adds a trading simulation and a desk shadow. That simulation runs on a live order book, so practice quoting into one before you arrive. The trader technical rounds cover make-a-market questions and betting questions.

DRW

DRW's loop is desk-dependent. Expect a take-home quantitative challenge, then a roughly 45-minute Zoom probability and statistics interview. The in-person Superday adds a Python coding challenge and a trading simulation.

Desk assignment changes what you're asked, and DRW's desks include treasury, equity options, and crypto. The trader assessment commonly runs 6 questions in 45 minutes, mixing probability, brainteasers, and math. Ask your recruiter which desk you're interviewing for before you start preparing.

Akuna Capital

Akuna runs the "80 in 8" mental-math test plus a sequences test, then a one-way recorded video interview. The trader technical round covers probability and market-making, and the final round is multiple one-on-ones.

Akuna also assigns options course quizzes during the process, so review options basics alongside arithmetic. The firm ran a 2024 Virtual Quant Trading Challenge built around writing market-making bots.

The EDGE framework for market-making questions

EDGE is a 4-step framework for the market-making exercise: Estimate, Decide, Gauge risk, Execute. It names what good traders already do out loud. Practice against it as a system, and don't recite it as a script.

1. Estimate: Set a fair value or a probability before you say any number out loud.
2. Decide: Quote a two-sided market or place your bet. Your spread is a statement about how confident you are.
3. Gauge risk: Size to your edge against the variance, and watch inventory and adverse selection. A counterparty who keeps hitting one side of your quote may know something you don't.
4. Execute: Act, then update. As the interviewer trades against you, move your quote on the new information and don't anchor to your first number.

EDGE only matters after the timed screen. Most market makers run their assessment before you demonstrate any of this, so prepare raw arithmetic speed first and separately. Jane Street is the exception, and its spoken format tests the same reasoning.

How to prepare for a quant trader interview

Quant trader interview prep covers 2 tracks: raw mental-math speed for the timed screen, and probability plus market-making reasoning for the trader rounds. Work both at once, since they reinforce each other.

Where to focus:

• Train arithmetic every day. Sessions of 15 to 20 minutes on Zetamac build the speed the timed screen measures. Aim for 45 to 55 as workable, 55 to 70 as competitive, and 70-plus for the top market makers. Treat those as rough targets, since firms don't publish cutoffs.
• Do your expected-value math out loud. Interviewers score how you reason as much as the number you land on.
• Practice making two-sided markets: quote a bid and an ask around a fair value, then have someone trade against you.
• Master the core probability set. Expected value, conditional probability and Bayes, gambler's ruin, and coin- and dice-based questions cover most of what gets asked.
• Practice updating on new information. Interviewers score how you adjust your spread mid-exercise, and that adjustment counts for as much as your opening quote.
• Keep pen and paper ready, since some assessments expect you to work manually and searching for scratch paper mid-question costs you time.
• Prepare the behavioral answers: a sharp "why trading, why this firm," one proudest project you can defend, and evidence you're competitive without being hard to work with.

Run both tracks in the same week. The timed screen comes first in the process, so give arithmetic the earlier slot if you're short on time.

Quant trading concepts you need to know

Quant trader interviews assume you know these concepts without hesitation, and each one appears in the questions or in the market-making exercise.

Quant trader interview FAQs

How do you prepare for a quant trader interview?

Prepare for a quant trader interview by training Zetamac arithmetic for timed-test speed, studying probability and expected value, practicing making two-sided markets with someone trading against your quotes, and preparing your answer to "why trading, why this firm."

What is the "80 in 8" test, and what score do you need?

The "80 in 8" test is a timed arithmetic screen used by Optiver and Akuna: 80 questions in 8 minutes with no calculator. No market maker publishes a cutoff, but the working Zetamac bands are 45 to 55 for functional, 55 to 70 for competitive, and 70-plus for the top market makers. Train 15 to 20 minutes daily in the weeks before the assessment.

Which quant firms don't use a timed math test?

Jane Street's quant trader interview process centers on betting and strategy questions asked out loud, and a person reads every application. Most other market makers, including Optiver, Akuna, IMC, and DRW, gate on a timed assessment first.

What is a market-making question?

A market-making question asks a candidate to quote a two-sided price (a bid and an ask) around a fair value, after which the interviewer trades against the quote. A classic version is Optiver's "make a market on a number between 1 and 100," where the fair value is 50.5.

Do you need to know poker to get a job at SIG?

You don't need to know poker to get a job at SIG (Susquehanna). Poker is post-hire training there, and no part of the interview tests it. Decision-theory and expected-value thinking do run through SIG's interviews.

What is a Superday?

A Superday is a final-round interview day at a trading firm, usually held onsite, that combines a trading simulation with further probability and behavioral rounds. DRW, IMC, and CTC all run trading simulations at this stage.

Do quant traders need to code?

Quant trader interviews rarely require production code. DRW is the main exception, with a Python coding challenge at its Superday, while quant developer loops center on C++ and low-latency systems.

Practice for your quant trader interview

Both the timed screen and the market-making exercise measure what you can do at speed, so practice them under conditions that match the real loop. Run timed quoting sessions with our mock interviews, and work through our question bank as you go.

Create a free account to save your progress and track which question types you keep missing.