PEAK6 Final Round Interview: Trading Case + Market Making

What the round is, what PEAK6 asks, and how to prepare, from candidate reports and the QuantVault practice set.

Stage 3 of 4Updated October 20, 2026

The PEAK6 Final Round interview is stage 3 of 4 in the PEAK6 interview process, after the First Interview. Format: Half day - Zoom (per PEAK6); older reports describe an in-person Chicago superday. PEAK6's final: half-day Zoom with leadership and future teammates; software finalists report live coding (parsing a CSV or quote feed).

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What the Final Round tests

Candidates report back-to-back trader and manager interviews (probability, brainteasers, mental math), a trading case study and market making. In one account you quote the sum of six dice rolled one at a time, updating as they land and tracking position and P&L (reported); others play as a group. Rehearse: Make a Market, card market table, market-making guide, options Greeks guide.

Expect dice and coin markets, a card betting game and a structured case, plus fit questions.

How to prepare for the Final Round

Track your position every trade. Losing count of inventory and P&L is the most common way to look shaky in a dice market.
Quote around expected value. Six dice average 21; tighten the spread as each die is revealed and the variance shrinks.
Know basic options intuition. Put-call parity and what delta and vega mean will help in a trading case at an options firm.

Further reading: How quant superdays work · Market-making game interview guide · Behavioral questions at trading firms · Mental math for trading interviews.

Common mistakes

Structure the case. State the edge, the risk and what would make you stop trading.

Prepare with QuantVault

PracticePractice the Final Round roundRound notes and prep Interview funnelAll 4 PEAK6 roundsThe full funnel, a practice set for each stage Firm guidePEAK6 interview guideEvery round, tracks, timeline, pay and a prep plan Problem setPEAK6 interview questionsEvery question tagged to this firm CourseMarket making & microstructure course6 lessons GameZetamac mental-math gameTimed arithmetic drill Game80 in 8 mental-math test80 questions, 8 minutes Next roundLeadership + Fit ConversationsPart of the final; decision in about two weeks (per PEAK6)

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Frequently asked questions

What is the PEAK6 Final Round interview?

It is stage 3 of 4 in the PEAK6 interview process, after the First Interview. Format: Half day - Zoom (per PEAK6); older reports describe an in-person Chicago superday. PEAK6's final: half-day Zoom with leadership and future teammates; software finalists report live coding (parsing a CSV or quote feed). Candidates report back-to-back trader and manager interviews (probability, brainteasers, mental math), a trading case study and market making.

How should I prepare for the PEAK6 Final Round interview?

Track your position every trade. Losing count of inventory and P&L is the most common way to look shaky in a dice market. Quote around expected value. Six dice average 21; tighten the spread as each die is revealed and the variance shrinks.

What comes after the Final Round?

The Leadership + Fit Conversations (stage 4 of 4). Format: Part of the final; decision in about two weeks (per PEAK6).

Practice the PEAK6 Final Round round

Open the round in the PEAK6 funnel: the round notes, prep, and every other stage of the process.

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