Prediction Markets: How They Work, Their Legality, and What Businesses Need to Know

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A prediction market is a marketplace where people buy and sell contracts whose value depends on the outcome of a future event — an election, an interest-rate decision, a sports result, the box-office of a film, or whether a company will hit a quarterly target. Because every price reflects real money wagered by thousands of participants, prediction markets have become one of the most accurate forecasting tools available, often outperforming polls and expert panels. They also sit at a complex intersection of financial regulation, derivatives law, and gambling law, which is exactly where most of the legal questions begin.

At AG Legal, we work with founders, fintech operators, and investors who want to understand whether building, operating, or participating in a prediction market is permissible — and under which rules. This guide explains how these markets function, why they forecast so well, and how regulators treat them in 2026.

What is a prediction market?

A prediction market — also called a forecasting market, information market, or event-contract market — is a platform where participants trade contracts tied to the outcome of a specific future event. Each contract typically pays a fixed amount (for example, $1) if the event happens and nothing if it does not. The price at which the contract trades, somewhere between $0 and $1, represents the market’s collective estimate of the probability that the event will occur.

If a contract on “Will inflation be above 3% this quarter?” is trading at $0.62, the market is effectively saying there is roughly a 62% chance it will. As new information arrives, traders buy and sell, and the price — and the implied probability — updates in real time. That is what makes prediction markets so powerful: they convert scattered knowledge held by many individuals into a single, continuously updated number.

How prediction markets work

Although platforms differ in design, almost every real-money prediction market follows the same basic lifecycle:

1. A market is created around a clear, verifiable question. The question must have an unambiguous resolution — a defined event, a defined date, and a trusted source of truth (an official result, a government release, a referee’s decision).
2. Contracts (shares) are issued for each possible outcome. In a simple yes/no market, “YES” and “NO” shares are created. Buying YES means you profit if the event happens.
3. Participants trade based on their beliefs. Prices move with supply and demand. A trader who believes the true probability is higher than the current price will buy; someone who thinks it is too high will sell.
4. The price reveals the crowd’s probability estimate. Because traders risk their own money, prices tend to converge toward the most defensible forecast.
5. The market resolves and pays out. When the outcome is known, winning contracts pay their full value and losing contracts expire worthless. Settlement is governed by the platform’s published rules.

Types of prediction markets

Prediction markets come in several forms, and the distinctions matter both for users and for the legal analysis:

• Binary (yes/no) markets: the most common format. The event either happens or it does not — “Will the central bank raise rates in March?”
• Categorical markets: several mutually exclusive outcomes, such as which of multiple candidates will win an election.
• Scalar (range) markets: the contract settles based on a numeric value, like the exact GDP growth figure or a final score.
• Centralized markets: run by a regulated or licensed company that holds funds, sets rules, and resolves outcomes (for example, CFTC-registered exchanges in the U.S.).
• Decentralized markets: built on blockchain smart contracts, where settlement and custody are handled by code rather than a central operator. These raise distinct regulatory and consumer-protection questions.
• Play-money markets: use virtual currency with no real payout, which usually keeps them outside gambling and securities regulation.

Why prediction markets are so accurate

Decades of research have shown that well-designed prediction markets frequently match or beat traditional forecasting methods. Several mechanisms explain this:

• The wisdom of crowds: aggregating many independent estimates tends to cancel out individual errors.
• Skin in the game: participants risk real money, so they have a direct incentive to be honest and well-informed rather than loud or biased.
• Continuous updating: prices respond instantly to new information, unlike a poll taken at a single moment.
• Self-correction: if a price drifts away from reality, informed traders profit by correcting it, which pushes the market back toward an accurate estimate.

This is why businesses, researchers, and even some governments study prediction-market prices as a real-time signal — though, as with any forecast, they are not infallible and can be distorted by thin trading, manipulation, or poorly written questions.

Major prediction market platforms

A handful of platforms dominate the conversation. Each operates under a different model and a different regulatory posture, so their availability varies by country and over time.

Availability, ownership, and legal status of these platforms change frequently. Always verify the current position in your jurisdiction before participating.

Are prediction markets legal? The regulatory landscape

There is no single global answer. Whether a prediction market is legal depends on how the contract is classified and where the user is located. The same product can be a regulated financial instrument in one country and unlawful gambling in another.

The gambling distinction

Outside of a recognized derivatives framework, regulators often analyze prediction markets under gambling law. The key questions are usually whether the activity involves consideration, a prize, and an outcome dependent on chance versus skill or genuine economic hedging. Where a market is deemed gambling, it may require a gaming license, be restricted to licensed operators, or be prohibited outright.

Securities and consumer-protection overlay

Depending on structure, some instruments can also implicate securities laws, anti–money-laundering (AML) and know-your-customer (KYC) obligations, advertising rules, and data-protection requirements. Decentralized platforms add further questions about who, if anyone, is legally responsible for the market.

Prediction markets vs. gambling vs. betting

These concepts overlap in everyday language but are treated very differently in law. The table below summarizes the typical distinctions — though, again, classification is ultimately decided by regulators and courts in each jurisdiction.

How to start a prediction market legally: a step-by-step overview

If you want to build, fund, or partner with a prediction-market platform, a disciplined legal review before launch protects both the business and its founders. At AG Legal we guide clients through exactly this path — from incorporation to licensing to ongoing compliance. A typical roadmap looks like this:

1. Classify the product in every target jurisdiction (derivative, gambling, security, or none of these).
2. Confirm licensing and registration requirements before accepting any user funds.
3. Build AML/KYC and sanctions screening into onboarding from day one.
4. Choose a corporate structure that allocates liability appropriately and supports cross-border operations.
5. Protect client funds through proper custody, segregation, or escrow arrangements.
6. Review marketing and terms of service for each market, including geo-restrictions and consumer-protection disclosures.

Frequently asked questions

What is a prediction market in simple terms?

It is a marketplace where people buy and sell contracts that pay out based on whether a future event happens. The price of each contract reflects the crowd’s estimate of how likely that event is.

Are prediction markets legal?

It depends on the jurisdiction and the contract. In the U.S., regulated event contracts operate under the CFTC, while unauthorized markets may be treated as illegal gambling. Other countries apply their own gambling, financial, and securities rules. Always confirm the current legal status where you operate or participate.

How is a prediction market different from gambling?

A prediction market is designed to aggregate information and produce a probability, with prices set by traders. Gambling is designed for wagering and entertainment, with odds typically set by the house. Legally, however, a prediction market can still be classified as gambling in some jurisdictions.

Why are prediction markets considered accurate?

Because participants risk real money, they are incentivized to be well-informed. Aggregating many such estimates tends to produce forecasts that match or beat polls and expert panels, and prices update continuously as new information appears.

Can I launch a prediction market platform in Costa Rica?

There is no specific prediction-market statute in Costa Rica, so the activity is assessed under existing commercial, financial, gambling, and anti–money-laundering frameworks. Feasibility and licensing depend on the exact model, how funds are handled, and which users you serve. This requires a tailored legal review before launch.

Do prediction market operators need AML/KYC compliance?

In most regulated frameworks, yes. Operators that handle real-money transactions usually need anti–money-laundering, know-your-customer, and sanctions-screening procedures, alongside the appropriate licensing and corporate structure.

What licenses do I need to operate a prediction market?

It depends on how the product is classified and where your users are located. You may need registration as a regulated exchange or derivatives venue, a gaming or gambling license, or specific financial authorizations — and, for blockchain-based markets, compliance with crypto and digital-asset rules. In Costa Rica, AG Legal helps you incorporate the right company and obtain the licenses your model requires before you accept any user funds.

Recommended reading

• How to incorporate a company in Costa Rica
• Gambling & gaming license in Costa Rica
• Crypto regulation in Costa Rica
• Legal & tax implications for inactive companies in Costa Rica

Related AG Legal services

• Incorporate a company in Costa Rica
• Gaming & gambling licensing
• Crypto & digital-asset compliance
• Book a consultation with AG Legal