Market making
Citadel Securities interview guide
Reported processes combine probability and mental maths for trading roles with demanding coding and systems interviews for engineers.
How the process usually runs
- 1
Online assessment
Probability and maths questions, or coding problems for engineering roles.
Practise: Beat the odds
- 2
Technical interviews
Probability, mental maths and market-making questions; C++ and systems for engineers.
Practise: Probability lessons
- 3
Final round
Several interviews in a day, mixing technical depth with market intuition.
Practise: Market simulator
What to revise
Weighted most heavily in reports: probability, market making, low-latency systems. The topics below are where the 136 questions in the bank reported at Citadel Securities come from.
Questions reported at Citadel Securities
- What keeps a liquid equity ETF trading close to the value of its basket?Free solution
- Which has more vega: a one-month at-the-money option or a one-year at-the-money…Free solution
- How do you replicate a cash-or-nothing digital call?Free solution
- You need the 100 largest values from a stream of 10⁹ numbers you cannot store.Free solution
- A backtest computes pnl = signal * returns, where both are indexed by day. What is wrong?Free solution
- You need the quote in force at the instant of each trade. Which join?Free solution
- An at-the-money one-year call on a $100 stock trades at $8, with rates at zero.Free solution
- An L1 cache reference costs about 1 ns and a main-memory reference about 100 ns.Free solution
- Two systems: one has a mean of 2 μs and a p99.9 of 2 ms, the other a mean of 5…Free solution
- The best bid is 100.00 for 900 shares and the best offer is 100.10 for 100 shares.Applied
A summary of what candidates publicly report, not information from Citadel Securities. Processes change by year, role and office. QuantMax is not affiliated with, endorsed by, or recruiting for Citadel Securities.