Cards Market Making Game

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Participate in a card-based expected value game often encountered in trading interviews. Practice with the typical questions and scenarios you might face in your upcoming trading interview. In this game, you’ll be the market taker.

Start with 500 points and a full deck of cards. Each card has a specific point value: numbers are worth their face value, so a 4 is worth 4 points, King equals 13 points and Ace 14 points.

How to Play

1. Initial Setup
   Three cards are dealt face-down on the table each round.
2. Offer to trade
   The game will present a market for the sum of the cards’ face values, not necessarily the expected value.
3. Buy or Sell
   Calculate your expected sum and decide whether to buy (expecting a higher sum) or sell (expecting a lower sum).
4. Reveal Cards
   The cards will be revealed for a customizable X seconds, and then turned face-down again.
5. Profit/Loss
   Compute your actual profit or loss and submit it.

Example

• Game’s presented value: 21
• Your calculated expected value: 24
• Since 24 is higher than 21, you decide to buy
• Actual card values: {4, 10, 6} (Sum: 20)
• Profit/Loss: -1 (because you bought at 21)

Scoring

• Correct Profit: Added to your total points.
• Correct Loss: Subtracted from your total points.
• Incorrect Profit: No change in total points.
• Incorrect Loss: Double the loss is subtracted from your total.