What Is a Prediction Market, Exactly?
A prediction market is a trading market where the assets are binary outcome questions. "Will X happen by date Y?" — YES or NO. Each YES share is worth £1 if the event happens, and £0 if it doesn't. The current price of a YES share is the market's best estimate of the probability of the event. A YES share priced at 65p implies a 65% probability.
Your First Three Concepts
- →Probability = Price: a 45p YES share means the market thinks there's a 45% chance this happens. You're betting on whether the true probability is higher or lower than 45%.
- →Binary resolution: at closing date, the contract resolves. YES holders get £1. NO holders get £0. The intervening price movements are just the market updating its view.
- →You don't have to hold to resolution: you can sell your YES share at any point before resolution. If you buy at 40p and the market moves to 60p, you can sell for a 20p profit without waiting for the outcome.
What Makes a Good First Market?
Start with a market where you have genuine knowledge. If you follow Premier League football closely, a match outcome or top-four finish market is where your edge lives. A technology policy market requires different expertise. The beginner's most common mistake is trading broadly and learning nothing — better to trade narrowly and develop calibrated opinions.
Boromarket has a browse-by-category feature. Find the section closest to your genuine expertise. Your first five trades should all be in that category.