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How Prediction Markets Work
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Relevant to AI safety practitioners interested in forecasting and information aggregation mechanisms; prediction markets are increasingly discussed as tools for governance, policy evaluation, and epistemic coordination in AI risk contexts.
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Summary
An introductory explainer on prediction markets as financial instruments for forecasting real-world outcomes, covering their mechanics, business models, and historical precedents. The piece contextualizes the recent mainstream surge in prediction markets following Kalshi's 2024 legal victory over the CFTC that permitted election trading in the US.
Key Points
- •Prediction markets function like futures or stock markets, not gambling—traders buy/sell shares on real-world outcomes with no house edge.
- •Platforms like Kalshi profit from transaction fees rather than betting against users, aligning platform incentives with market accuracy.
- •Markets operate as binary or multiple-selection contracts, with prices reflecting crowd-aggregated probability estimates.
- •Historical roots date back centuries, including reliable 18th-century British markets and 19th-century US presidential election forecasting.
- •Kalshi's 2024 legal victory against the CFTC was a landmark moment that legitimized and mainstreamed election prediction markets in the US.
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| Page | Type | Quality |
|---|---|---|
| Kalshi (Prediction Market) | Organization | 25.0 |
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# How do prediction markets work?
Exploring the markets that turn uncertainty into opportunity.
By [Kalshi](https://news.kalshi.com/authors/kalshi)
Jan 6, 2026
Prediction markets are exploding in popularity. This is thanks in no small part to Kalshi’s judicial win against regulators from the Commodity Futures Trading Commission (CFTC) in October 2024. This case represented a monumental milestone, as it legalized election trading in the US.
2025 was arguably an even more important year for the industry, as prediction market platforms quickly moved from the financial fringe into the mainstream. Kalshi was even featured in an episode of _South Park_.
Yet despite the soaring popularity of these platforms, many people are still left wondering: what exactly is a prediction market? The following article provides a detailed explanation of this burgeoning asset class, and how you can legally trade on anything from sports predictions to culture to weather, just like you would on the stock market.
## **What is a prediction market?**
Prediction markets, sometimes referred to as event contracts, derivatives, idea futures, information markets and more, have actually been around for centuries. They offer the public an opportunity to buy shares to trade on real-world outcomes, from presidential elections to polls to Trump speeches, to crypto prices and sports outcomes.
Although they are sometimes referred to as "political betting," and compared to gambling platforms and sportsbooks, there are important differences. In reality, they have much more in common with futures trading or trading in the stock market than they do with traditional sportsbooks.
Unlike sports betting platforms like Fanduel and Draftkings, where users are gambling against the house, prediction markets have no vested interest in the outcome. They simply act as a middleman to facilitate trades, and make their money off transaction fees. As a result, a prediction market trader will never be throttled or banned for being too profitable.
### **Definition and components**
Prediction markets are arranged as binary, multiple-selection, continuous and conditional markets, and the operating mechanics are quite simple.
Here’s an example of a standard binary prediction market, which can be applied to presidential elections, sports, politics, weather forecasts, cultural events and many other outcomes:
**Will the United States experience another government shutdown on January 31, 2026?**
Kalshi Widgets
## Government shutdown on Jan 31, 2026?
## 9 9 8 7 6 5 4 3 2 1 0 0 9 9 8 7 6 5 4 3 2 1 0 0 %
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NovDecDecJanJan0%25%50%75%100%»
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Kalshi’s traders, where total
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