— GUIDE —
CITADEL SECURITIES TRADER INTERVIEW GUIDE
Citadel Securities publishes a fair amount about what it wants in a trader and very little about how the trading interview runs. This guide separates the two.
UPDATED 2026-10-08 · 12 MIN READ · BY THE VARIANCE TEAM
A firm can tell you a great deal about what it values and almost nothing about how it interviews. Both facts are useful, as long as you keep them apart.
Checked against Citadel Securities' careers site in September 2026. The firm publishes candidate FAQs for markets and trading, and separate write-ups of the interview process for engineering and quantitative research. It does not publish an equivalent stage-by-stage guide for trading. Any round-by-round account of a trading loop you find online is a candidate report, not the firm speaking.
What the firm actually says it wants
Their candidate FAQ for markets and trading is the most useful official source. It lists a quantitative degree background as preferred, along with systematic problem solving, an understanding of taking risk under uncertain conditions, programming and statistics, the ability to absorb new information and act on it quickly, and resilience.
Read that list again with an interviewer's eyes. Almost every item is something you can be tested on in conversation. "Acts quickly on new information" is what a market-making question measures when the interviewer trades against your quote and watches what you do next.
The shape of the process, and who is describing it
Worth being precise here, because this is where most pages about Citadel Securities quietly stop citing anything. The firm publishes a write-up of its campus quantitative research interview process and candidate FAQs for markets and trading. It does not publish a stage-by-stage guide for the trading loop.
So the sequence below is candidate-reported. It recurs consistently enough across accounts to be useful, and it is not the firm speaking:
- Online assessment. Reported as HackerRank or similar, mixing coding with probability. This is the stage that removes most of the field.
- Recruiter screen. Motivation, background, and why trading rather than research.
- Two technical rounds. Probability problems worked aloud, often with light coding. Reports describe two or three problems per round, mixing expected value with applied trading scenarios.
- Superday. Quantitative and probability rounds plus a trading game, where the interviewer makes a market and you quote against it while managing a position.
Reported end to end at roughly four to five weeks. Plan around the online assessment, since nothing later matters if it goes badly.
What to train
| Area | Why it maps to the stated criteria |
|---|---|
| Probability and expected value | Pricing uncertain outcomes is the core of risk taking under uncertainty |
| Mental arithmetic | Speed is what lets you reason rather than calculate when a question moves |
| Market making | Directly exercises quoting, inventory, and updating on new information |
| Statistics | Named explicitly in their technical skills list |
| Explaining your reasoning | Their stated culture is collaborative; a silent correct answer is a weak answer |
Expect to be asked about risk, not just math
A distinguishing feature of trader interviews at firms like this is that the arithmetic is often the easy part. The follow-up is where the evaluation happens: what would change your answer, how much would you size it, and what would you do if the market moved against you immediately.
Practice finishing every answer with the sentence you would say out loud. "My fair value is 62, I would quote 60 at 64, and I would widen if I learned the payoff depends on something I have not seen."
Representative practice questions
These are original representative questions, not Citadel Securities questions.
- A contract pays $100 if a fair coin shows heads twice in a row out of two flips. Price it and quote a market.
Fair value is
$100 × 1/4 = $25. A quote near 23 at 27 is defensible. Say why the spread is where it is. - You quote 40 at 44 and get lifted at 44 three times in a row. What now?
Treat the repetition as information. Reassess the fair value upward, reduce size, or widen. Explain the reasoning before naming a new number.
- A stock is equally likely to finish at 90 or 110. What is a fair price, and how does your answer change if you must hold to expiry?
Expected value is 100. Holding risk does not change the expectation, but it should change your size and the spread you demand.
- You have a strategy that has been profitable for twenty days straight. How much does that convince you?
Less than it feels. Ask about sample size, correlation between days, and whether the wins are small and the losses undiscovered. This is a resilience-and-skepticism question.
- I will roll a die. You quote a market on the result, and I choose which side to take. Where do you quote?
Fair value is 3.5, but you are quoting against someone who chooses after seeing your price, so a symmetric 3.4 at 3.6 loses to whichever side is better. Widen: something like 3 at 4. The point being tested is whether you notice that the counterparty has optionality you do not.
- Same game, but now I roll first and I can see the result. Where do you quote?
You should be reluctant to quote at all, and saying so is the correct answer. Against a counterparty with strictly better information, any two-sided price is adverse selection. If forced, quote very wide and size small, and say explicitly that the spread is compensation for the information gap.
- You are long 200 lots and the price has moved four ticks against you in a minute. Talk me through what you do.
There is no single right answer and the interviewer knows it. What is being assessed is whether you distinguish between the position being wrong and the market being noisy, whether you name a level at which your thesis is invalidated, and whether you size the decision rather than flipping between all-in and flat.
Where candidates misread this firm
Treating Citadel and Citadel Securities as one employer
They are separate businesses that recruit separately. Citadel is the hedge fund; Citadel Securities is the market maker. The work, the interview emphasis and the pay structure differ. Applying to one while preparing for the other is a common and avoidable error.
Assuming New York is the main office
Citadel Securities runs a large Miami presence, and the filing data reflects it: 29 Department of Labor records in Miami against 46 in New York for fiscal 2025. Miami is not an overflow office.
Preparing the maths and not the risk conversation
The arithmetic in these loops is rarely the hard part. The follow-up is. Expect every number you produce to be met with a question about what would change it.
Going quiet during the trading game
The market-making round is a conversation the interviewer is steering. A candidate who quotes silently and adjusts silently gives almost nothing to assess. Narrate the inventory, not just the price.
What Citadel Securities pays
Unusually for this industry, some of this is documented. New York pay-transparency law requires a good-faith range on postings, and the firm's intern postings state: "In accordance with applicable law, the base salary range for this role is $4,500 to $5,800 per week." Across an eleven-week program that is roughly $49,500 to $63,800 in base, with corporate housing and a signing bonus on top.
For full-time staff, US Department of Labor filings for fiscal 2025 put the median base at $250,000 for Quantitative Researcher across 43 records. By office, the median runs $250,000 in Miami against $225,000 in New York — and Florida levies no state income tax, so the after-tax difference is larger still.
Historical filing figures and posted base salaries do not establish discretionary bonus. For pay context with source dates and verification limits, see the salary guide and intern pay comparison.
How to prepare
Work the underlying skills rather than a script for one firm. The market-making guide covers quoting and inventory, probability questions covers the math, and quant trader interview prep lays out the whole process end to end.
Frequently asked questions
How many rounds is the Citadel Securities interview?
Citadel Securities does not publish a stage-by-stage guide for trading, so any round count is candidate-reported. Those reports consistently describe four to six rounds across roughly four to five weeks: an online assessment, a recruiter screen, two technical rounds, and a Superday. Treat that as a pattern rather than a published format.
What does Citadel Securities pay interns?
Its own intern postings state, in accordance with New York pay-transparency law, "the base salary range for this role is $4,500 to $5,800 per week." Over an eleven-week program that is roughly $49,500 to $63,800 in base pay, before the corporate housing and signing bonus the firm also provides.
Does Citadel Securities pay more in Miami or New York?
Miami, on the filed figures. US Department of Labor filings for fiscal 2025 show a median base of $250,000 in Miami across 29 records against $225,000 in New York across 46. Florida also has no state income tax, so the after-tax gap is wider than the headline one.
Does Citadel Securities ask coding questions for trading roles?
The firm names programming among the technical skills it looks for in markets and trading, and candidate reports describe an early online assessment that mixes coding with probability. Trading loops lean more on probability, market making and risk reasoning than on algorithms, but arriving unable to write code is a risk.
What does Citadel Securities look for in a trader?
Its candidate FAQ for markets and trading names a quantitative degree background as preferred, along with systematic problem solving, comfort taking risk under uncertainty, programming and statistics, the ability to absorb new information and act on it quickly, and resilience. Nearly every item on that list is testable in conversation.
Keep reading
- Jane Street trading interview guide — the other name on most shortlists, and a firm that publishes far more.
- Market making interview questions — the round that decides most trading Superdays.
- What quant firms test — how a market maker weights speed against depth.
- Quant intern pay in 2026 — where the $4,500 to $5,800 range sits against the rest of the market.
Source: Citadel Securities, Candidate FAQs: Markets & Trading, published November 2024, checked 8 October 2026. Compensation language quoted from the firm's own intern postings, checked 21 September 2026.
Prepare for the invitation you receive
Citadel Securities’ careers site was reviewed 8 October 2026. An older published FAQ is useful context, but it does not guarantee the current sequence of rounds. Confirm the role, location, preparation material and scheduling instructions with your recruiter. The worked preparation linked here is representative, not official interview content.