Picture posting a buy at 47 cents and a sell at 51 cents, then waiting for the four-cent gap to pay you. Prediction market making is that business, and the lesson shows why the gap is a hope rather than income in hand. You learn bids, asks, queue position and what happens when only one side fills and fair value drops to 40. Inventory piles up on one side, informed traders hit stale quotes, and fees shave what is left. For a bettor it matters because every price on a prediction market is someone's quote. Knowing how makers protect themselves tells you who is likely sitting on the other side of your trade.
Learning objectives
- Understand the methodology and why professionals test it.
- Reproduce the worked example and identify its critical assumptions.
- Apply the technique in a nonfinancial paper-research exercise.
- Distinguish a robust conclusion from a seductive but unsupported interpretation.
