Guides & explainers

Study guides & book companions

• The Best Quant Interview Books, Compared (2026)

  Honest 2026 comparison of the best quant interview books: Green Book vs Heard on the Street vs Joshi, plus probability picks. Which to read for which role.

• Blitzstein's Introduction to Probability: The Best Foundation for Quant Prep

  Harvard's Stat 110 book for quant prep: why it's the best probability foundation, the chapters that map to interviews, and how to pair it with problem drilling.

• Fifty Challenging Problems in Probability: A Quant Prep Guide

  How to use Mosteller's Fifty Challenging Problems in Probability for quant interview prep: which problems still get asked, how to work the solutions, and where to practice the same ideas interactively.

• Green Book Solutions: Chapter-by-Chapter Study Guide (2026)

  Solutions guide to Zhou's A Practical Guide to Quantitative Finance Interviews (the quant Green Book): chapter-by-chapter approach, what to prioritize by role, and 396 free worked problems on the same topics.

• Heard on the Street: What to Study, What to Skip (2026 Guide)

  Which Heard on the Street chapters pay off in 2026 quant interviews, what to skip, how it compares to the Green Book, and 2,800+ practice problems to drill.

• Mark Joshi's "Quant Job Interview Questions and Answers": Who It's For and How to Use It

  How to use Mark Joshi's "Quant Job Interview Questions and Answers" for quant dev and desk-quant prep, plus where to practice the coding and pricing problems.

• Puzzles to Puzzle You: A Quant Prep Guide

  Shakuntala Devi's Puzzles to Puzzle You for quant interviews: what transfers, what doesn't, and where to practice the same puzzle families with solutions.

• The "Quant Interview Questions PDF" — What You're Actually Looking For

  Looking for a quant interview questions PDF? What the circulating PDFs actually contain, what they miss, and where to get the same material free with worked solutions.

• Shreve for Quant Interviews: What You Actually Need

  Shreve Volume I & II for quant interviews: which chapters matter, what interviewers actually ask from them, and how to pair the books with practice.

Book guides

• Best Quant Finance Books (2026): The Core Shelf, a Reading Order, and Picks by Role

  Skip the 200-book lists. The 5 books working quants actually reuse, plus a reading order and picks by role — trader, researcher, or dev. Updated 2026.

• Green Book Study Plan: How to Work Through A Practical Guide to Quantitative Finance Interviews

  Green Book study plan: what each chapter of A Practical Guide to Quantitative Finance Interviews covers, how to work the solutions, and where to practice each topic.

• 150 Most Frequently Asked Questions on Quant Interviews: Solutions & Study Guide

  Honest review of 150 Most Frequently Asked Questions on Quant Interviews (Stefanica): what it covers, who it suits, and how to pair it with real practice.

How QuantVault compares to other prep tools

• The Best Quant Interview Prep, Honestly Compared (2026)

  An honest 2026 guide to the best quant interview prep: Zetamac, Brainstellar, QuantQuestions, QuantVault, getcracked, and the books, mapped to each stage.

• Jane Street vs Citadel: Comp, Culture, Interviews & Which Offer to Take

  Jane Street vs Citadel compared honestly: 2026 compensation data, interview difficulty, culture and turnover, and how to decide if you hold both offers.

• Optiver vs IMC vs Flow Traders: The Amsterdam Market Maker Comparison

  Optiver vs IMC vs Flow Traders: how the three Amsterdam market makers compare on assessments (80-in-8 vs 24-in-18 vs math test), pay, and culture.

• QuantGuide Alternatives, Honestly Ranked

  The real QuantGuide alternatives compared: QuantVault, Brainstellar, Zetamac, the Green Book, LeetCode, TraderMath and more — what each is for and what it costs.

• QuantGuide vs QuantQuestions (2026): Pricing, Features, and an Honest Verdict

  QuantGuide charges $35/mo; QuantQuestions hides pricing behind signup. We compare question counts, tools, and what both miss — verified July 2026.

• QuantQuestions Alternatives: 7 Platforms Compared (2026)

  The best QuantQuestions alternatives for quant interview prep in 2026 — QuantVault, QuantGuide, OpenQuant, TraderMath and more, compared on free tiers and depth.

• QuantVault vs Brainstellar: An Honest Comparison

  Brainstellar's free puzzle collection vs QuantVault's structured quant prep: solution depth, firm mapping, OA practice, and how to use each for quant interviews.

• QuantVault vs getcracked (2026): An Honest, Feature-by-Feature Comparison

  getcracked's live Discord intel vs QuantVault's 2,800+ problems (396 free, no signup), firm OA funnels, and coding judge. Honest verdict for each use case.

• LeetCode for Quant Interviews: What It Covers, What It Misses

  Is LeetCode enough for quant interviews? What quant loops actually test, where LeetCode fits for QR/QD/trading roles, and what to use for the probability and market rounds.

• QuantVault vs MyntBit: Honest 2026 Comparison

  QuantVault vs MyntBit compared honestly by the QuantVault team: question bank depth, C++ coding, firm coverage, OA sims, and pricing. Verify on both free tiers.

• QuantVault vs OpenQuant: An Honest Comparison

  QuantVault vs OpenQuant compared: OpenQuant's quant job board and prep resources vs QuantVault's firm funnels, 2,800+ problem bank, OA simulations, and trading games.

• QuantVault vs QuantGuide: An Honest Comparison

  QuantVault vs QuantGuide compared honestly: question banks, solutions depth, firm-specific prep, OA practice, trading games, and pricing — and which fits your prep.

• QuantVault vs QuantQuestions: An Honest Comparison

  An honest QuantVault vs QuantQuestions comparison: two quant-interview question banks compared by problem count, firm playlists, coding judge, and use case.

• QuantVault vs TraderMath: An Honest Comparison

  An honest QuantVault vs TraderMath comparison: where each tool wins, a feature table, and how to pick the right quant interview prep for your use case.

• QuantVault vs Zetamac: An Honest Comparison

  Zetamac trains raw arithmetic speed; QuantVault covers the whole quant interview. What each is for, how trading firms actually test mental math, and how to combine them.

Concept & question-type explainers

• The Airplane Seat Problem: Why the Answer Is 1/2 (Three Proofs)

  The airplane seat problem (100 passengers, 100 seats) solved three ways — symmetry, recursion, and simulation — plus the follow-ups quant interviewers ask.

• Bayes' Theorem in Quant Interviews

  Bayes for quant interviews: the odds-form update that traders use, false-positive classics, witness problems, and practice problems with full solutions.

• Behavioral Interview Questions at Trading Firms (With Answer Frameworks)

  The behavioral interview questions trading firms actually ask — why trading, risk stories, failure questions — with answer frameworks and a worked example.

• C++ Low-Latency Interview Questions at HFT Firms

  C++ low latency interview questions asked at HFT firms: cache hierarchy, lock-free queues, the memory model, and a fully worked tick-to-trade latency budget.

• Coin Flip Questions in Quant Interviews

  Coin-flip questions for quant interviews: pattern races (HH vs HT), waiting times, biased-coin tricks, fair-from-unfair, and practice problems with solutions.

• Dice Questions in Quant Interviews

  Dice questions for quant interviews: expected values with rerolls, dice games and fair pricing, non-transitive dice, and practice problems with full solutions.

• Fermi Estimation Interview Questions at Trading Firms

  Fermi estimation interview questions at Jane Street, SIG & Optiver: the anchor-number toolkit, a fully worked example, confidence intervals, and the betting follow-up.

• Gambler's Ruin in Quant Interviews

  Gambler's ruin for quant interviews: fair and biased formulas, a worked example, the random-walk connection, and practice problems with full solutions.

• Quant Interview Cheat Sheet: Probability, Markov Chains, Options & Linear Algebra (Free PDF)

  Free quant interview cheat sheet: probability, expectation, Markov chains, option Greeks and linear algebra, plus a fully worked example and common traps.

• The Kelly Criterion in Quant Interviews

  The Kelly criterion explained for quant interviews: the formula, a worked example, why trading firms ask it, fractional Kelly, and practice problems with solutions.

• Linear Regression Interview Questions: OLS Assumptions, R² Traps & Regression to the Mean

  Linear regression interview questions for quant roles: OLS assumptions, the β = ρσy/σx formula, R² traps, regression to the mean, and a fully worked example.

• Machine Learning Quant Interview Questions: Overfitting, Cross-Validation & Feature Leakage

  Machine learning quant interview questions explained: bias-variance, purged cross-validation, feature leakage, and a worked backtest-overfitting example.

• The Market Making Game Interview: How to Answer 'Make Me a Market'

  The market making game interview, step by step: how to answer 'make me a market' with fair value, spreads, inventory skew, and a fully worked dice example.

• Market Microstructure Interview Questions: Order Books, Spreads & Adverse Selection

  Market microstructure interview questions explained: order book mechanics, bid-ask spread math, adverse selection, and a fully worked Glosten-Milgrom example.

• Markov Chains in Quant Interviews

  Markov chains for quant interviews: transition matrices, stationary distributions, absorbing states, a worked example, and practice problems with full solutions.

• Martingales in Quant Interviews

  Martingales for quant interviews: the definition that matters, optional stopping in practice, the ABRACADABRA theorem, the betting-system fallacy, and practice problems.

• Mental Math for Trading Interviews: Training Plan, Zetamac Benchmarks & Firm Tests

  Mental math for trading interviews: Zetamac score benchmarks, the Optiver 80-in-8 format, core speed tricks, and a training plan that actually raises your score.

• The Monty Hall Problem — and the Variants Interviews Actually Ask

  Monty Hall for quant interviews: why switching wins, the 100-door and n-door variants, the ignorant-host twist, and practice problems with full solutions.

• Optimal Stopping in Quant Interviews

  Optimal stopping for quant interviews: the 37% secretary rule, backward induction, threshold strategies, dice and uniform variants, with practice problems and solutions.

• Options Pricing Interview Questions: Black-Scholes, Greeks & Put-Call Parity

  Options pricing interview questions explained: put-call parity, Black-Scholes intuition, the Greeks firms actually test, and a fully worked ATM example.

• Quant Mental Math Practice: The Tests, the Skills, and How to Drill Them

  Every trading-firm arithmetic screen in one place: what each firm runs, the four skills tested, benchmarks, and free practice in the real formats.

• Random Walks in Quant Interviews

  Random walks for quant interviews: recurrence, hitting probabilities, expected exit times, reflection principle, and practice problems with full solutions.

• Number Sequence Tests in Trading Interviews: The 8 Pattern Types & How to Practice

  How to pass the number sequence test at IMC, Akuna, Maven & Flow Traders: the 8 pattern types, a fully worked example, timing strategy, and drills.

• Statistics Interview Questions for Quant Roles: Hypothesis Testing, MLE & p-Value Traps

  Statistics interview questions for quant roles: hypothesis testing, MLE, confidence intervals, a fully worked example, and the p-value traps interviewers set.

• Stochastic Calculus Interview Questions: Ito's Lemma, SDEs & Brownian Motion

  Stochastic calculus interview questions for quant roles: Brownian motion properties, Ito's lemma, the key SDEs, a fully worked example, and the traps interviewers set.

• Time Series Interview Questions: Stationarity, ARMA & Autocorrelation Traps

  Time series interview questions for quant roles: stationarity, AR(1) math, ACF/PACF signatures, a fully worked forecasting example, and the traps interviewers set.

• Top 50 Quant Interview Questions (With Full Solutions)

  The top 50 quant interview questions asked at Jane Street, Citadel, and Optiver — grouped by topic, with a fully worked solution and the traps that cost offers.

• Zetamac: What a Good Score Is, and How to Practice Past It

  Zetamac’s exact settings, the candidate-reported score bands, how firms actually use arithmetic screens, and how to train past a plateau.

Firm interview intel

• Arrowstreet Capital Interview Questions: Econometrics & Written Test

  Arrowstreet Capital interview questions: the reported online assessments, regression-heavy technical rounds, and the onsite written test — with a prep plan.

• Chicago Trading Company (CTC) Online Assessment Guide

  What the CTC online assessment covers: the aptitude and probability format candidates report, the Codility coding OA for engineers, and how to prepare.

• Cubist Systematic Strategies Interview Questions (Point72's Quant Arm)

  Cubist Systematic Strategies interview guide: the reported HackerRank screen, open-ended take-home modeling project, and multi-round pod technicals.

• The Da Vinci Derivatives Interview, Explained

  Da Vinci Derivatives' famously games-heavy trading assessment as candidates report it: math test, poker-style games, market making — and how to prepare.

• Eclipse Trading Interview Questions: Mental Math, Options & Probability Tests

  Eclipse Trading interview questions and process: the timed mental math, options theory, and probability tests candidates report, and how to prepare for each.

• Eisler Capital Interview Questions & 5-Round Process

  Eisler Capital interview questions and the reported 5-round quant process: Bayesian stats, random walks, Black-Scholes and coding, plus how to prepare.

• G-Research Interview Questions & Process (2026 Guide)

  G-Research interview questions and process for 2026: the 10-question online quant quiz, the four-interview technical stage, maths deep-dive, and how to prepare.

• G-Research Online Assessment: The Quant Quiz, Explained

  The timed G-Research quant quiz: format, the ML variant, the engineering coding screen, and how to prepare.

• The G-Research Quiz, Explained

  G-Research's famous quant quiz explained: the timed math/probability format candidates report, what it filters for, and how to practice for it.

• Graviton Research Capital Interview Questions & Process

  Graviton Research Capital interview questions and process: the reported quant OA format, probability and C++ rounds, and how IIT candidates prepare.

• Jain Global Quant Interview Questions & Hiring Process

  Jain Global interview questions and hiring process: what quant candidates report as of mid-2026, the Millennium pivot, and how to prepare for each round.

• Jane Street Puzzles vs the Jane Street Interview

  Jane Street's monthly puzzles vs their actual interview: what the puzzles train, what the interview actually asks, and how to prepare for each.

• Man AHL / Man Group Quant Interview Questions & Graduate Programme

  Man AHL interview questions and process: candidate-reported coding tests, take-home projects, probability, statistics and Python rounds at Man Group's quant arm.

• The Maven Securities Interview, Explained

  Maven Securities' trading interview process as candidates report it: math test, games, and interviews — plus how to prepare for each stage.

• Millennium Online Assessment & HackerRank Guide

  What the Millennium online assessment looks like as of mid-2026: reported HackerRank formats by role, stats MCQs, pandas coding, and how to prepare.

• The Quant OA Census 2026-27: What 38 Firms Actually Test

  The first-round online assessment at 38 quant firms in one table: format, platform, timing, and whether the question bank repeats. Compiled from candidate-reported formats, updated each cycle.

• Point72 Online Assessment: HackerRank + Cubist Take-Home

  Point72 online assessment guide: reported HackerRank formats by role, the Cubist take-home modeling exercise, and how to prepare, as of mid-2026.

• Quadeye Interview Questions: OA Format & Interview Rounds

  Quadeye interview questions and process: the reported three-section online assessment, puzzle-heavy interview rounds, and how to prepare for each stage.

• The Quadrature Capital Interview, Explained

  Quadrature Capital's interview process as candidates report it: research-style problems, ML/statistics depth, and coding — plus a preparation plan.

• Quant Online Assessments: every firm’s OA, explained

  The four OA formats (math screens, coding tests, cognitive batteries, game simulations), which firms run which, and format guides with free practice for every firm on QuantVault.

• Qube Research & Technologies Online Assessment: What to Expect

  What the Qube Research online assessment covers — Codility and HackerRank coding rounds, math and ML screens — based on candidate reports, with a prep plan.

Careers in quant

• Citadel Quant Salary (2026): QR, QT & Citadel Securities Comp

  Citadel quant salary data for 2026: reported comp for quant researchers, traders, and devs at Citadel and Citadel Securities, from intern to senior.

• Quant Firms by Interview Difficulty

  Which quant interviews are hardest? A candidate-reported difficulty tiering across HFTs, prop shops, and funds — and what makes each tier hard in a different way.

• DRW Quant Salary (2026): Trader & Researcher Comp Breakdown

  DRW trader and researcher comp: reported ranges from new grad to experienced, the discretionary-bonus structure, and honest variance caveats.

• HRT Quant Salary (2026): Algo Developer & Researcher Comp

  HRT’s high-base comp culture: official new-grad ranges, intern rates, and reported researcher and developer totals, with sources.

• The Quant Internship Timeline for Summer 2027

  The 2027 quant internship recruiting timeline: when applications open, how early the elite firms close, stage-by-stage pacing, and a month-by-month prep plan.

• The Quant Trading Interview Process: Every Stage From CV Screen to Superday

  Every stage of the quant trading interview process — CV screen, online assessments, phone rounds, and the superday — what each tests and how to prepare.

• Jane Street Salary 2026: $400K–$650K New Grad to $1.5M+ Senior, by Level

  Candidate-reported Jane Street comp: $400K–$650K new-grad year one, $600K–$1M+ by year 3–5, senior traders near $1.5M — and how the bonus really vests.

• Optiver Salary (2026): Trader Compensation by Office & Level

  Optiver salary data for 2026: reported trader and graduate compensation across Amsterdam, Chicago and Sydney, with base, profit share and level breakdowns.

• 8 Quant Finance Portfolio Projects That Impress Interviewers

  Eight quant finance projects for your resume, tiered by difficulty, with what each one actually signals to trading-firm and hedge-fund interviewers.

• Quant Developer Interview Guide: Role, Compensation & the Full Loop

  Quant developer interview questions, the full C++/systems/LeetCode loop, reported compensation ranges, and how the dev track differs from quant research.

• Quant Researcher Salary (2026): New Grad to Senior, With PhD Premium Data

  Quant researcher salary in 2026: reported new-grad, mid-level, and senior comp ranges, the PhD premium, and how pay actually gets structured at top firms.

• How to Write a Quant Resume (2026): Templates & Real Bullet Examples

  How to write a quant resume in 2026: what recruiters scan for in 20 seconds, ATS-safe formatting, and real bullet examples for trader, researcher, and dev roles.

• A Day in the Life of a Quant Trader (Pre-Market to Close)

  A day in the life of a quant trader, hour by hour: pre-market prep, the open, monitoring and adjusting, post-close research, and what it signals for interviews.

• Becoming a Quant Without a PhD

  You don't need a PhD for most quant seats. Which roles require one, which don't, and the concrete no-PhD paths through trading, dev, and research.

• Questions to Ask at the End of a Quant Interview

  The best questions to ask quant interviewers at the end of trading and research interviews — what signals well, what to skip, and how to tailor by firm.

• Quant Salaries in 2026: The Honest Numbers, From Intern to PM

  Candidate-reported 2026 quant pay: $140k–$450k+ new-grad total comp by firm tier, $100–$150/hr internships, and the caveats headline numbers hide.

• SIG Quant Salary (2026): Trader & Researcher Comp Breakdown

  What SIG quantitative traders and researchers report earning, from intern rates to the payout track, with every number sourced.

• The Quant New-Grad (Full-Time) Timeline for 2027 Starts

  When quant firms open full-time applications for 2027 starts, which hire year-round, and the month-by-month plan from August 2026.

• Quant Trader vs Quant Researcher

  Quant trader vs quant researcher compared: what each actually does day to day, how compensation differs, how the interviews differ, and how to choose.

• Two Sigma Quant Salary (2026): Researcher & New Grad Comp

  Two Sigma researcher and new-grad comp: official campus-hire base ranges, levels.fyi medians, and how the salary-plus-bonus structure works.

• The Quant Online Assessment, Explained

  Quant OA formats explained: mental-math sprints, probability MCQs, coding assessments, games, and proctored math tests — with per-firm examples and practice links.

Industry explainers

• Quant Finance Glossary: Every Term You'll Hear in Interviews

  A quant finance terms glossary covering prop shops, market makers, online assessments, adverse selection, Greeks, and every term interviewers assume you know.

• How Quant Trading Firms Actually Make Money

  How do quant firms make money? A practitioner's explanation of spread capture, latency arbitrage, and stat arb — and the math of tiny edges at huge scale.

• Quant Trading Competitions 2026: IMC Prosperity, Jane Street ETC, Citadel Terminal

  The quant trading competitions worth entering in 2026 — IMC Prosperity, Jane Street ETC, Citadel Terminal, Rotman RITC — formats, timing, and how much they actually matter for recruiting.