Plain definitions of the terms you meet on prediction markets and event contracts. Clear, neutral, and checkable. Information, not advice.
Last reviewed 11 September 2025 · Educational, not advice
Understanding how these markets work does not make trading safe. Prediction markets can lose you money, and a confident price can still be wrong. Stake only what you can afford to lose, never to chase a loss, and never on borrowed money. If it stops feeling like a free choice, step back. In the United States you can call or text the helpline on 1-800-GAMBLER or visit ncpgambling.org.
It is a set of plain, neutral definitions of the terms used on prediction markets and event contracts, written so a careful beginner can follow them. It is general information, not financial, legal, or tax advice.
Terms are reviewed and dated, and the list grows over time. Each entry carries a last reviewed date so you can see how current it is.
The rules change fast. Get the changes that affect you, plain and current, not tips.
Independent. Every claim dated and sourced. No platform pays for its place.