Quant Interview Prep That Still Works in 2026

The classic 'how many golf balls in a 747' era of quant interviews is over. In 2026, top shops (Jane Street, Citadel, Two Sigma, HRT) test probabilistic reasoning under time pressure and live coding against market data.

A four-week study plan

1. Week 1: Probability fundamentals — conditional, Bayesian, Markov.
2. Week 2: Applied stats — estimators, variance, bootstrap.
3. Week 3: Algorithmic coding under 20-minute limits.
4. Week 4: Mixed mocks — alternating quant math and coding.

What not to over-study

Heavy measure theory and stochastic calculus are not tested in screens. Save them for the on-sites at shops that specifically do research tracks.