Hedge fund
Citadel interview guide
For research roles the reported emphasis is statistics, probability and machine learning, tested in depth and often with a research case.
How the process usually runs
- 1
- 2
Technical interviews
Probability, statistics and regression asked in depth – derivations, assumptions and what breaks when they fail.
Practise: Statistics lessons
- 3
Final round
Several technical interviews, often including a research discussion or a case built on data.
Practise: Research case lessons
What to revise
Weighted most heavily in reports: statistics and inference, regression, machine learning. The topics below are where the 496 questions in the bank reported at Citadel come from.
Questions reported at Citadel
- You have 100 observations and a standard error of 0.4.Free solution
- A stock has 30% volatility, the index 15%, and their correlation is 0.6.Free solution
- A simple regression has a correlation of 0.6 between the two variables.Free solution
- You regress one stock’s price on another’s and get R² = 0.95 with a t-statistic of 40.Free solution
- A spread follows Δsₜ = −0.05 sₜ₋₁+εₜ on daily data.Free solution
- Can three assets be pairwise correlated at −0.5?Free solution
- What is the most negative pairwise correlation that five assets can all share?Free solution
- What is d(Wₜ²)?Free solution
- What is ∫₀ᵗWₛ dWₛ?Free solution
- Why is ordinary shuffled k-fold cross-validation wrong on a financial time series?Free solution
A summary of what candidates publicly report, not information from Citadel. Processes change by year, role and office. QuantMax is not affiliated with, endorsed by, or recruiting for Citadel.