Quant Superday: What It Is, How Each Firm Runs It, and How to Prepare

A quant superday is the final round of a trading-firm or quant-fund interview process: three to six interviews stacked back to back on a single day, onsite or over video, with traders, researchers, and senior staff. Nearly every firm ends its funnel this way. What differs is the mix of rounds, whether live games are involved, and how quickly a decision follows. This guide collects what our firm process pages document about each one.

What a superday actually is

The name comes from banking recruiting, but the quant version is its own animal. After the online assessment and one to three phone rounds, the firm has a shortlist and wants to see each candidate in depth, so it compresses the remaining interviews into one day: typically three to five sessions of 45 to 60 minutes each, sometimes with a lunch or dinner attached, and at several firms a live market-making game or a poker session.

Firms run it this way for three reasons. Several interviewers see the same candidate on the same day and compare notes while impressions are fresh. It tests stamina, which matters on a trading floor. And every interviewer files an independent score, so the firm learns whether you are consistently good or only good in one room. That is the defining feature of a superday: one weak session can sink an otherwise strong day.

Virtual or in person? Both. HRT and IMC run the final day either virtually or onsite, Optiver's trading-game day can be on the floor or virtual, and SIG's is a physical visit to its Bala Cynwyd office outside Philadelphia with a dinner the evening before. Video superdays are common for interns and international candidates; in-person days skew toward new-grad and experienced hires. Ask the recruiter rather than assuming.

How each firm runs its superday

Everything below comes from our individual firm process pages, which are built from candidate reports. Where a firm does not use the word superday, we describe its final onsite instead. Click a firm name for the full stage-by-stage breakdown.

Firm	Superday length	Interview blocks	What they test	Decision timing
SIG	Full onsite day in Bala Cynwyd, plus a dinner the evening before	Several 1-hour quant rounds, a roughly 75-minute data-discussion round, live Acey-Deucy poker, office tours, sometimes a team game	Open-ended estimation, expectation and variance trade-offs, the AKQ game, decisions under uncertainty	Slow. The full loop is 8 to 11 rounds over about two months; candidates report ghosting and no-headcount rejections after a full onsite
Jane Street	One full day, morning and afternoon	Morning: two or three live market-making games, then lunch. Afternoon: coding and data-science rounds	Pricing under uncertainty, inventory management, handling being picked off, clean implementation	Candidates who struggle in the morning games are usually cut at lunch. No separate wrap-up round
Citadel / Citadel Securities	All day, a series of roughly 45-minute interviews	Quantitative math (two or three probability and statistics problems), CoderPad coding, and an ML/statistics round for QR and ML tracks	Full derivations, correctness and edge cases under time pressure, regression assumptions	Not same day. Hiring managers review feedback, then interested teams run a separate team-fit round
Optiver	QT trading-game day, on the floor or virtual, can run a full day	A reported five-round interval-estimation format (target total score of at least 2.0), a horse-race odds variant, group exercises, then a roughly 45-minute culture-fit round with a partner	Calibration, Kelly-style sizing, spotting arbitrage, and fit	Fast turnaround either way, with a roughly 8-month cooldown after a rejection
IMC	About five rounds in one day, onsite or virtual	Rapid probability (about 4 minutes per question), an hour of brain teasers, an hour of coding, game theory, Fermi estimation, the recurring behavioral pair	Speed on quant reasoning, quantitative-product knowledge, why IMC and why trading	Superdays are scheduled within days of the first round, but headcount is volatile
Two Sigma	Multi-round onsite rather than a labeled superday	Three technical rounds (data science, coding, stats and math), three MD rounds of 45 to 60 minutes, and a 60-minute senior MD or VP closer	Regression theory, OLS derivations, research judgment, long-term fit	Candidate-reported; our page does not document a timeline
HRT	Full day of back-to-back sessions, virtual or in person	Multiple programming rounds, a systems and architecture discussion, problem-solving, a project and behavioral deep-dive	Optimization and systems reasoning, mental-math probability, collaboration	Candidate-reported; our page does not document a timeline
DRW	Multiple final rounds at the full technical bar	Probability, brain teasers, trading intuition, options and game theory, coding for engineering tracks	Sharp probabilistic reasoning and trading sense over formulas	Candidate-reported; our page does not document a timeline

SIG and Jane Street: the games are the gate

The SIG onsite is the closest thing in the industry to a day of applied game theory: hour-long rounds built on open-ended estimation (noisy-angle estimation, estimating X given Z equals X plus Y for normals), a long data-discussion round, and a live poker game. Bring EV reasoning, not textbook rigor, and budget patience, because SIG is notorious for reschedules and silence after a full loop. Jane Street's day is sequential instead: two or three live mock-trading games in the morning, where you quote a two-sided market and manage inventory while the interviewer trades against you, and candidates who do not do well are usually sent home at lunch. Those who advance spend the afternoon on coding and data science, and that block ends the process.

Citadel, Optiver, and IMC: what comes after matters

Citadel runs its behavioral round before the technical day, then a superday of roughly 45-minute interviews covering quantitative math, coding with a "clean up this messy code" refactor, and ML/statistics for research tracks. It is not the last step: interested teams run a final team-fit conversation, often around one open-ended prompt like "design an alpha." Optiver's QT final is a day of trading games and group exercises, followed by a partner round that is functionally a taste decision and is known for cutting technically strong candidates; decisions come fast, and a rejection carries a roughly eight-month cooldown. IMC's superday is about five rounds, from four-minute probability questions to game theory and Fermi estimation, with "Why IMC?" and "Why trading?" asked yet again. IMC schedules within days, so be ready before you apply.

Two Sigma, HRT, and DRW: final onsites without the label

Two Sigma does not run a games-based superday. Its onsite is three technical rounds, three managing-director rounds, and a senior closer, and the content is regression theory and research judgment rather than brain teasers. HRT's final round is a full day of back-to-back sessions heavy on programming, systems reasoning, and a project deep-dive. DRW's final rounds span its whole question set. For all three, the structure is candidate-reported and varies by team.

What gets asked on a superday

The superday does not introduce new topics. It asks the phone-round topics harder, with follow-ups, and adds live games. Expect some combination of:

• Probability with extensions. Markov chains, waiting times, conditional probability, and problems that get a second twist after you solve the first version. Our probability question hub covers the canon.
• Expected value and betting decisions. Fair value of a bet, whether to take it, and how much to size. See expected-value questions.
• Market-making games. Quote a market, get traded against, update. The signature round at Jane Street, Optiver, and SIG, and present in some form at Citadel Securities and IMC. The market-making game guide walks through the mechanics.
• Mental math and estimation. Interval estimation, Fermi questions, arithmetic under a clock. Drill with mental math for trading interviews.
• Brain teasers and game theory. The AKQ game, pirate-style bargaining, turn-taking games. Start with brain-teaser interview questions.
• Coding and statistics. Coding blocks at Jane Street, Citadel, IMC, and HRT; regression and ML at Two Sigma and Citadel QR.
• Behavioral. Why trading, why this firm, a project, a failure, a blunt self-assessment. It is scored, and at Optiver it decides. Prepare with behavioral questions for trading firms.

A 7-day prep plan before a superday

You already have the fundamentals if you reached this round. The week before is about depth, stamina, and the game formats you have not rehearsed live.

1. Day 7: read the firm's process page and list the blocks. Write down every round you expect, its length, and what it tests. If the page says the morning is games, games are your priority.
2. Day 6: hard probability with follow-ups. Solve 8 to 10 problems out loud, and after each one ask what the interviewer's next twist would be. Answer that too.
3. Day 5: market-making games. Play the market-making game for an hour. Focus on skewing quotes with inventory and narrowing the spread as information arrives.
4. Day 4: mental math and estimation. Timed arithmetic, then interval estimation. Practice stating an interval you would stand behind, since that is exactly how Optiver's rounds are scored.
5. Day 3: a full mock block. Three 45-minute sessions back to back with different problem types and no break longer than ten minutes. Fatigue only shows up when you simulate it.
6. Day 2: behavioral and firm research. Rehearse "why trading," "why this firm," one project, one mistake, and an honest ranking of your strengths against your cohort.
7. Day 1: light review and logistics. Twenty minutes of easy problems, confirm the schedule and the video link or travel plan, and stop early. Do not learn anything new the night before.

Day-of logistics and common mistakes

• Get the schedule in writing. Number of rounds, interviewer roles if the recruiter will share them, and the breaks.
• Virtual: control the environment. Wired connection if possible, a quiet room, pen and paper in reach, a charged backup device. Test screen sharing with the tool the firm uses (CoderPad at Citadel and HRT, for example).
• Reset between rounds. Each interviewer scores independently and has no idea how the last room went. A bad round is over the moment it ends.
• Do not go silent while thinking. The interviewer is scoring your reasoning. State the setup, the cases, and where you are stuck. A recovered wrong answer scores well; a quiet correct one scores less than you think.
• Do not play it safe in games. Optiver's process page is explicit that overly conservative betting gets candidates cut. Quote real markets, size real bets, and move your number when the information changes. Anchoring on a first quote is the fastest way to get picked off.
• Do not treat the behavioral round as a break. At Optiver it is the decision, at Citadel it comes before the technical day, and at IMC the same two questions return on the superday.
• Do not prepare for the wrong firm. Jane Street's morning games and Two Sigma's regression derivations have almost nothing in common. Read the firm page first; the quant interview process guide covers the general funnel.

Practice the day before it happens

The best predictor of a good superday is having already done a bad one in practice. Work through timed sets in the QuantVault problem bank (about 400 problems are free, with full solutions), rehearse quoting and inventory with the market-making game and the rest of the trading games, and if you want firm-tagged sets and the full solution library for the final week, current plans are on the pricing page.

Frequently asked questions

How long is a quant superday?

Usually one full working day. Most firms run three to six interviews of 45 to 60 minutes each, back to back, with a lunch break. IMC's runs about five rounds, Citadel's is a series of roughly 45-minute interviews, and Jane Street splits its day into morning market-making games and afternoon coding and data-science rounds. SIG adds a dinner the evening before its onsite.

What percent of candidates pass the superday?

Firms do not publish pass rates, and the numbers candidates quote online are anecdotal and vary by firm, role, and year. What our firm pages do document is where the cuts happen: Jane Street usually cuts candidates who struggle in the morning games before the afternoon, Optiver's partner round is known for rejecting technically strong candidates, and SIG candidates report no-headcount rejections even after a full onsite. Treat the superday as a real filter, not a formality.

Is the SIG superday different from the Jane Street one?

Yes, substantially. SIG's is a Philadelphia-area onsite with a pre-dinner, office tours, several hour-long open-ended estimation rounds, a long data-discussion round, and a live Acey-Deucy poker game, and the full loop can reach 8 to 11 rounds over about two months. Jane Street's is a single day where the morning is two or three live market-making games that act as the gate, followed by coding and data-science rounds in the afternoon for candidates who advance.

Do you get the offer the same day?

Rarely. The general pattern is a recruiter call within days. Optiver is known for a fast turnaround either way after its final culture-fit round. Citadel is the opposite: the superday is followed by a separate team-fit round once hiring managers have reviewed feedback. SIG is the slowest and least predictable, with candidates reporting long silences and reschedules after the onsite.

Is a superday virtual?

It can be either. HRT and IMC run their final day virtually or in person, Optiver's trading-game day can be on the floor or virtual, and SIG's onsite is a physical visit. Video superdays are common for internship and international candidates. Confirm the format with the recruiter, and if it is virtual, test your connection, screen sharing, and the coding tool the firm uses in advance.

What should I do the night before a superday?

Light review only: twenty minutes of easy problems to stay warm, then confirm the schedule, the video link or travel plan, and your setup. Do not attempt new material. Sleep and food matter more than one extra problem, because the day tests consistency across four or five rooms, and fatigue is the most common reason a strong candidate has one weak round.