We are an independent reference on prediction markets and event contracts. We explain how these markets work, which platforms exist, where each is legal, and how they are taxed, so a careful reader can decide for themselves.
Information, not advice. This page is general information about prediction markets and event contracts. It is not financial, investment, legal, tax, or betting advice, and it is not a recommendation to trade. Prediction markets carry a real risk of financial loss. Rules, fees, and eligibility change often and vary by region, so verify the current terms and your own eligibility with the platform and a qualified professional before you act. 18+ or the legal age in your region.
The Index 100 is a reference library, not a tip sheet and not a broker. We describe the prediction market platforms that operate today, the rules that govern them, the fees they charge, and the way the major market categories trade. We do not predict outcomes, we do not sell picks, and we do not tell you to trade. Our aim is simpler. When you arrive with a question, you should leave with an accurate, current, plainly stated answer, and a clear sense of what to verify yourself before you act.
A price on a prediction market is the market reading of a probability. A contract that trades at 60 cents reflects a crowd estimate of roughly a 60 percent chance, and it pays out a fixed amount if the event resolves yes. That is a useful lens on the future. It is not a promise, and treating it as one is how people lose money.
No platform pays for coverage, a score, or a place in a comparison. We do not run paid placements and we do not write sponsored reviews dressed up as editorial. Where we maintain affiliate or referral relationships in the future, they will be disclosed, kept entirely separate from how we rate and describe a platform, and shown only where that platform is genuinely legal and available to you. A commercial relationship will never change what we say about safety, fees, or the law.
We treat currency as the single most important quality in this niche. Regulation moves quickly, fees change without much notice, and a platform that is available in your region one month may not be the next. Every page that makes a legality, fee, or tax claim carries an as of date, and every page carries a visible last reviewed date so you can judge how fresh the information is.
We research from primary sources first. That means the Commodity Futures Trading Commission and other regulators, the platforms themselves, and reputable reporting, rather than rumor or marketing copy. When a figure cannot be confirmed from a reliable source, we say so plainly instead of guessing. When a legal position is contested or unclear, we describe the dispute rather than pretend it is settled.
We will not tout, tip, or frame any market as easy money, and we will not present a forecast as a certainty. We state the risk of financial loss honestly on every page, because it is real. We do not target anyone under 18 or under the legal age in their region, and we do not publish pages for individual live markets, which expire and would only encourage chasing the moment rather than understanding the system.
The Forecast is our newsletter. It is a calm, occasional note on what changed in prediction market regulation, availability, and fees, written in the same neutral voice as the rest of the site. There are no picks and no hype. You can unsubscribe at any time.
Questions, corrections, and source suggestions are welcome. We take accuracy seriously, so if you spot something out of date, please tell us through the contact page. We would rather fix a stale figure quickly than leave a reader with the wrong picture.
No. Everything on this site is general information. It is not financial, investment, legal, tax, or betting advice, and it is not a recommendation to trade. For advice about your own situation, speak to a qualified professional.
No platform pays for coverage or a score. Any future affiliate or referral arrangement will be disclosed and kept separate from how we describe a platform, and shown only where the platform is legal and available to you.
Every legality, fee, and tax claim carries an as of date and every page carries a last reviewed date. We re review the platform and legality pages regularly because the rules in this area change frequently.
Because the right venue depends on where you live, what you want to trade, and your own eligibility and risk tolerance. We give you the facts and the questions to ask so you can choose, rather than steering you toward one name.
Yes, please do. Use the contact page. If you can point us to a primary source we will review and update the page, and note the change.
Prediction markets can lose you money. Trade only what you can afford to lose, never to chase a loss, and never with borrowed money. A clear regulator does not make a market safe to over trade. If it stops feeling like a free choice, step back and set a deposit limit or a self exclusion. In the US you can call or text the national problem gambling helpline on 1-800-GAMBLER or visit ncpgambling.org.