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Market-Making Game Practice

Post a two-sided quote; a counterparty trades against you. The signature quant game.

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"Make me a market on ..." is the signature trading-interview game, used across trading desks and market makers. Make a Market recreates it: you post a two-sided quote - a bid and an ask - on an uncertain quantity, and a counterparty trades against you.

Quote too wide and nobody trades; quote too tight and a better-informed counterparty picks you off. You learn to set a fair value, choose a defensible spread, and update as information arrives - the exact skills a market-making interview probes.

What it's modelled on

The ‘make me a market’ interview game

This recreates the signature market-making interview game - quote a two-sided market and a counterparty trades against you - reported across trading desks, market makers, and derivatives desks. Quote too wide and nobody trades; too tight and you get picked off.

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What it trains

  • Quoting two-sided markets (bid/ask) on uncertain quantities
  • Setting spreads and managing adverse selection
  • Updating a price as new information arrives

How it's scored

Each tick you quote a market and a counterparty trades against you; your rating scores how well you priced for the flow and skewed for your inventory - not your realised P&L, which is luck. Ranked play uses one fixed format for everyone, Free included; casual runs are configurable with Premium - difficulty, ticks, and whether fair value is shown.

Related guides

Frequently asked questions

How do I prepare for a 'make a market' interview question?
Practise estimating a fair value, quoting a bid and ask around it with a sensible spread, and updating when the counterparty trades - a trade against you is information. Make a Market lets you rehearse that loop against a live counterparty.
Which interviews use market-making games?
Probability-and-market-making, options market-making, and EV-and-betting-game rounds all use quoting games, where the point is sound pricing and risk judgement rather than a single right answer.