Quant interview prep guides

Market Making Review Sheet

Market making review sheet for fair value, spread, inventory, adverse selection, quote updates, risk limits, and common mistakes.

Candidates consolidating market-making fundamentals.

Fair value

State the midpoint estimate and why it is reasonable before adding spread or skew.

Spread

Choose a spread that reflects uncertainty, adverse selection risk, and how competitive you want the quote to be.

Inventory

Track whether you are long, short, or flat. Adjust quotes when position risk changes.

Adverse selection

Ask why the counterparty wants to trade. If flow may be informed, update fair value or widen the spread.

Risk limits

Do not maximize one-trade edge while ignoring inventory caps, loss limits, drawdown, or position size.

Final checks

Before each quote, check midpoint, bid, ask, spread, inventory, and what you will do if the quote is hit.

Practice the pattern

Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.