AQR Capital Management Interview Questions
Quant Researcher problems seen at AQR: regression and OLS theory, portfolio and factor finance, linear algebra, probability, and a deep block of clean algorithmic coding.
Inside the AQR Capital Management interview
AQR Capital Management is a systematic, factor-based hedge fund built on academic finance, so its Quant Researcher interviews lean on regression and statistics, portfolio and factor reasoning, and a solid base of clean algorithmic coding.
What they test
The research core is linear regression done properly — deriving the OLS estimator, knowing its assumptions and diagnostics, omitted-variable bias, and the ridge / lasso bias-variance tradeoff that shows up in factor models. Around it sits portfolio finance (efficient frontier, minimum-variance combinations, value-at-risk) and the linear algebra underneath it (positive semi-definite covariance, SVD and low-rank structure). A large block of algorithmic coding — arrays, sorting, prefix sums, DP, graphs — rounds out the on-site.
The recurring shapes
Expect a covariance matrix you must argue is PSD, a two-asset minimum-variance portfolio, and a regression where the trap is a violated assumption or a confounder. On the finance side, cross-sectional momentum and VaR on a position recur. The coding asks favor a clean linear-time idea: sliding windows, prefix sums, monotonic stacks, and range queries (including the classic max(d[i]-d[j]) TLE trap).
How to approach
Treat regression questions as derivations, not recipes — be ready to write the normal equations and explain what breaks when an assumption fails. For finance, reason from the covariance structure rather than memorized formulas. For coding, state the brute force, name the bottleneck, then reach for the standard trick that drops it to linear or log time; correctness and a clean complexity argument matter more than cleverness.
Difficulty leans medium (35 of 55), with 16 easier warm-ups and 4 hard problems for the senior bar.
AQR Capital Management coding questions (38)
- Range Queries for Max(d[i] - d[j]) with i <= j (the TLE trap)
- Cake Thief (Bounded Knapsack)
- Split at Digit Boundaries and Sort Each Run
- Count Subarrays Divisible by m
- All-Pairs Two-Sum With Stable Ordering
- Recover the Matrix From Its 2D Prefix Sums
- Subarrays Containing Exactly m Odd Numbers
- All Pairs Achieving the Minimum Absolute Difference
- Counting Friend Circles
- Longest Subarray With Sum at Most K
- Inorder Successor in a Binary Search Tree
- Task Scheduler With Dependencies and Earliest-Start Times
- K Smallest Pair Sums from Two Sorted Arrays
- Maximum Score Path With Bounded Jumps
- Count Pairs With a Given Difference
- Maximum Value After Repeated Doubling
- Range Queries for the Maximum Min-to-Max Profit
- Search in a Sorted Matrix
- Optimal Worker-Task Assignment
- Inverting a Monotone Function on the Unit Interval
- Implement Quicksort
- Sorting a K-Sorted Array
- Palindrome Pairs
- Minimum Swaps to Move All Evens Ahead of Odds
- Sort Integers by Popcount Then Value
- Number of Islands in a Grid
- Minimum Insertions to Make a String a Palindrome
- Make an Array Unique With Minimum Total Sum
- Election Winner With Alphabetical Tie-Break
- Items With No Cheaper Later Price
- Fast Exponentiation in Logarithmic Time
- Bucket Sort for Uniform Samples
- Longest Substring Without Repeating Characters
- Sorting a Million Integers in a Tiny Range
- Sort Letter Runs Between Digit Delimiters
- LRU Cache
- Maximum Subarray Sum With One Deletion
- Fast Exponentiation by Squaring
AQR Capital Management regression questions (5)
AQR Capital Management finance questions (3)
AQR Capital Management optimization questions (2)
AQR Capital Management linear algebra questions (2)
AQR Capital Management statistics questions (1)
AQR Capital Management time series questions (1)
AQR Capital Management options pricing questions (1)
AQR Capital Management combinatorics questions (1)
AQR Capital Management expected value questions (1)
AQR Capital Management interview FAQ
What kind of questions does AQR Capital Management ask in quant interviews?
Candidates most often report coding, regression and finance questions. This page collects 55 of them, 43 stamped with the month they were last reported — each with a full worked solution.
How hard are AQR Capital Management interview questions?
The set spans 16 easy, 35 medium and 4 hard problems. Most sit at medium difficulty — solvable in a few minutes with clean reasoning — with a harder tail that rewards knowing the canonical tricks.
How do I prepare for the AQR Capital Management quant interview?
Work through this set by topic (use the sidebar), starting from your weakest area. 4 problems are free to open with their full solution, so you can judge the quality before anything else. Then walk the full AQR Capital Management interview guide for the round-by-round funnel and the online assessment.
Are these the actual AQR Capital Management interview questions?
They are built from candidate-reported AQR Capital Management questions. We rewrite each prompt for clarity and author the worked solutions ourselves — we don't claim the wording is verbatim, and we never invent questions or recycle generic lists. 43 of 55 carry the month they were last reported.