Every prediction market starts with a question. Will a candidate win an election? Will a team win a championship? Will inflation finish above a certain level? Turning those questions into contracts you can actually trade, however, takes considerably more work than simply writing a headline and hitting publish.
Prediction market contracts need clearly defined outcomes, reliable data sources, and settlement rules that leave as little room for interpretation as possible. Understanding how prediction market contracts are created can help you evaluate a market before you trade it and, more importantly, understand exactly what your contract represents.
Every Contract Starts With an Event
The first step is deciding what event the market will measure. Most prediction market contracts focus on something that will produce a verifiable future outcome, whether that involves sports, politics, economics, entertainment, or another category.
A platform might want to create a market asking whether the Federal Reserve will change interest rates at its next meeting. That sounds simple, but the exchange still needs to define what qualifies as a change, which meeting counts, and which official announcement determines the answer. Those details turn a general prediction into a tradable contract.
The Question Has to Produce a Clear Answer
Many prediction markets use binary contracts with two possible outcomes, commonly Yes and No. If the event happens according to the contract rules, the winning side typically settles at $1 while the losing side settles at $0.
Consider a hypothetical contract asking:
Will Team A win the championship?
If Team A wins, Yes contracts settle at $1. If another team wins, No contracts settle at $1.
Other markets can offer multiple outcomes or ranges instead. A market predicting an economic statistic, for example, could divide possible results into several brackets rather than simply asking whether the number will finish above or below one threshold.
Contract Rules Matter More Than the Headline
This is probably the most important lesson in this entire guide: you are trading the rules, not just the title.
A headline gives you a quick description of the market, while the full contract terms determine what actually settles it. Two markets that appear almost identical can settle differently if their underlying rules use different deadlines, definitions, or sources.
Before trading, look for details including:
- The exact event being measured
- The deadline or expiration time
- What qualifies as Yes or No
- The official settlement source
- How unusual circumstances are handled
- When the contract is expected to settle
Reading those rules can prevent confusion later.
Exchanges Need a Reliable Settlement Source
A prediction market cannot simply decide afterward which outcome seems correct. Contracts should identify an objective source that can determine what happened.
The appropriate source depends on the market. Sports contracts might rely on official league results, economic contracts can reference government agencies, and weather markets may use specified meteorological data. Election contracts can similarly point to specific certification procedures or official sources.
The important part is establishing the source before traders enter the market. If everyone knows what information determines settlement, there is considerably less room for disagreement once the event occurs.
What Happens When Real Life Gets Messy?
Creating contracts becomes harder when something unexpected happens. Games can be postponed, candidates can withdraw, government statistics can be revised, and events can be canceled altogether.
Good contract rules anticipate as many of these situations as reasonably possible. An exchange might specify what happens if an event is delayed beyond a particular date, whether an initial data release or later revision controls settlement, or how a canceled event affects outstanding contracts.
No rulebook can anticipate everything. Clear language gives the exchange a framework for resolving unusual situations without inventing new rules after traders have already put money on the line.
Federally Regulated Exchanges Have Another Step
On CFTC-regulated exchanges, creating a contract also involves a regulatory process. Designated contract markets can generally submit new products through procedures established under the Commodity Exchange Act and CFTC regulations.
One important method is self-certification. An exchange can certify that a new contract complies with the Commodity Exchange Act and CFTC rules before listing it, subject to applicable filing requirements and regulatory authority.
That process has become particularly important in prediction markets because event contracts can move much faster than traditional financial products. It has also become a major point of disagreement between exchanges, regulators, and other industry participants over how much flexibility platforms should have when launching new markets.
Traders Help Determine the Price
The exchange creates the contract, but that doesn't necessarily mean it decides the probability. Once trading begins, buyers and sellers submit orders at prices they are willing to accept. If a Yes contract trades around 65 cents, the market is broadly communicating something close to a 65% implied probability at that moment.
New information can change those prices quickly. The contract rules remain fixed while traders continuously reassess the likelihood of the underlying outcome. That distinction is important. The exchange defines what you're predicting. The market determines what that prediction is worth right now.
Settlement Finishes the Contract's Life Cycle
Once the event happens, the exchange checks the outcome against the rules and designated settlement source. Winning contracts settle according to their terms, while losing contracts expire without the winning payout.
That is why contract design matters from the start. A poorly written question might seem harmless when trading begins but become a serious problem when an unexpected situation exposes ambiguity in the rules.
A well-designed contract should make settlement almost boring. Everyone should already know what happens before the final result arrives.
Frequently Asked Questions About Prediction Market Contracts
Can prediction markets create contracts about anything?
No. Platforms operate under their own rules and, depending on how they are structured and regulated, may face restrictions on which contracts they can offer.
Can contract rules change after trading begins?
Generally, you should expect the published terms to govern the market. Exchanges may have procedures for extraordinary circumstances, errors, or other unusual situations, which is another reason to understand a platform's rules before trading.
Who decides the price of a prediction market contract?
Traders generally establish prices through buying and selling. The exchange provides the marketplace and contract structure rather than simply assigning a probability.
Why do similar contracts sometimes have different prices?
Different platforms can have different traders, liquidity, and contract specifications. Always compare the actual rules before assuming two similarly titled markets represent the same event.