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Updated weekly · Last refresh Oct 6

Citadel Quantitative Researcher Interview Questions

The questions to prepare for a Citadel Quantitative Researcher interview. Questions from real interview reports rank first. Updated daily.

13questions
~2htotal time
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1
Finance & AccountingStart here. 3 questions · ~24 min
Implied Volatility SurfaceMedium

Tests understanding of volatility modeling and option pricing surfaces.

Citadel
Market Maker Risk StageMedium

Assesses understanding of market making mechanics and risk exposure.

Risk ManagementCitadel
Optimal Weights from Sharpe RatiosHard

Evaluates portfolio optimization with risk-adjusted performance measures.

financial metricsCitadel
2
Machine Learning3 questions · ~24 min
Lasso vs Ridge RegressionMedium

Assesses understanding of regularization and feature selection.

Citadel
Preventing Overfitting in Financial Time SeriesMedium

Tests techniques for robust modeling on financial data.

model trainingoverfittingCitadel
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3
Statistics & Probability6 questions · ~48 min
X, Y, and YZ CorrelationsMedium

Checks understanding of transitive correlation implications.

CorrelationCitadel
Probability of Linear InequalitiesHard

Assesses ability to work with joint probability and linear inequalities.

probabilityVarianceCitadel
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4
More topics1 question · ~8 min
Efficient Product of Large MatricesHard

Assesses knowledge of advanced matrix multiplication strategies and structure exploitation.

linear algebraCitadel
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