Market Making Dice Game iconMarket Making Card Game

Welcome to the Market Taking Game!


Maximize your expected profit over a series of trading rounds.

How to Play

At the beginning of each round, you will be presented with a set of cards. These cards are valued between 2 and 14, with the Ace being worth 14. Some of these cards may be turned face up, while others remain face down.

Playing card, 2 of spades2
Playing card, 3 of spades3
Playing card, 4 of spades4
Playing card, 5 of spades5
Playing card, 6 of spades6
Playing card, 7 of spades7
Playing card, 8 of spades8
Playing card, 9 of spades9
Playing card, 10 of spades10
Playing card, Jack of spades11
Playing card, Queen of spades12
Playing card, King of spades13
Playing card, Ace of spades14

Market Maker Quote

Alongside the cards, you'll see a market maker quote displayed as X at Y. Here's what they represent:

  • X (Bid): The price the market maker is willing to buy at.
  • Y (Ask): The price the market maker is willing to sell at.

Time To Trade

With a starting budget of 500:

  • Decide the number of units you wish to trade.
  • Choose whether you want to buy (at the Ask price) or sell (at the Bid price) those units at the given market maker quote.
  • Just like in the real market, an offer remains valid only for a limited amount of time. So, act quickly!

Valid Orders

Ensure that your orders are valid:

  • You should be able to afford any long position you take based on your budget.
  • Similarly, your balance should always cover the maximum possible loss for any short position you take.


Once you make your decision:

  • All cards are turned face up.
  • The sum of the card values represents the market price for that round.
  • Based on your decision and the resulting market price, you'll either realize a profit or a loss.

Track Your Position

Being aware of your position is crucial:

  • After each round, you'll be asked to report your return.
  • For higher difficulty levels, you'll also need to maintain a mental record of your balance throughout the entire game.

Market Events

When enabled, the following market events can randomly occur during each round:

Card X is worth Y this round

Only cards worth 10 or more this round

Only cards worth 7 or less this round

Only even cards this round

Only uneven cards this round

Only red cards this round

Only black cards this round

Keep in mind that these events can influence the validity of your order.


The market maker provides random quotes. Your advantage lies in your understanding of expected values and the insights from the face-up cards. Use this knowledge to outsmart the market maker and anticipate the market price. If you enable market events, be prepared for occasional changes to the card deck, which will influence and challenge your optimal trading strategy.

Best of luck in your trades and strategizing!