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Settlement is determined by the contract’s exact wording, designated result source, determination time and correction rules. Once the authorized decision process establishes the outcome, the winning side receives the specified payout and the losing side receives zero, subject to the product’s terms and fees.
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What prediction markets and event contracts are
A prediction market is a marketplace for contracts linked to future events such as an election result, an economic release or another objectively verifiable occurrence. Participants trade against one another rather than simply casting a vote. Their orders move the contract price as information, expectations and available liquidity change.
The U.S. Commodity Futures Trading Commission (CFTC) says event contracts are typically structured as swaps. Many are binary, presenting a clearly worded Yes/No question, a fixed payout and an expiration or determination time. The contract specification—not a trader’s interpretation after the fact—controls what counts as a winning outcome.
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The anatomy of a contract
- Event question: The precise proposition being traded, including any threshold, date, location, unit or other condition.
- Outcome choices: Often Yes and No, although some products offer several choices, ranges or partial payouts.
- Price: The amount a buyer pays for one contract. On the convention described by CME Group, prices run from $0.01 to $0.99 and approximately represent a 1% to 99% market-implied likelihood.
- Settlement value: Usually $1 for the winning side of a standard binary contract and $0 for the losing side.
- Expiration or determination time: The point at which trading ends or the contract’s result is evaluated, as defined in the rules.
- Result authority: The named data source, agency, exchange or other decision-maker that determines the official outcome.
That structure makes the contract different from an informal bet. The venue publishes enforceable terms covering the event definition, trading hours, settlement source, corrections and disputed or unavailable results.
How the price becomes a probability signal
If a Yes contract trades at $0.70, the market is expressing roughly a 70% implied chance under the venue’s pricing convention. A winning contract pays $1, so the holder’s gross profit is $0.30 before fees. If the outcome is No, the contract pays nothing and the $0.70 purchase price is lost.
CME gives the same illustration with a $0.45 contract: a correct position pays $1, while an incorrect one pays $0. The net result depends on commissions, exchange fees and any other charges. A price is therefore a tradable estimate, not a calibrated forecast or a promise of success. Bid-ask spreads, thin liquidity, risk preferences, uneven information and attempted manipulation can all push the market price away from the true statistical probability.
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How trading works before settlement
1. Read the listing and contract specifications
Start with the venue’s event page and full rule set. Confirm exactly what is being measured, the relevant geography and time zone, the last time orders can be placed, and the source that will publish the result. Two contracts with similar headlines can have different thresholds or determination dates and can settle differently.
2. Submit an order
Participants submit bids to buy and offers to sell. When compatible orders meet, the market records a transaction price. As new information arrives—or as buyers and sellers become more or less willing to trade—the best available prices and the last-traded price can move.
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A venue may let you buy Yes directly, buy No directly, or use another position format. The available choices depend on the contract design. Before confirming an order, check the number of contracts, the displayed cost, the potential payout and all applicable fees.
3. Monitor the position
Your position remains open until you close it, the contract expires, or the venue otherwise ends trading under its rules. A changing quote affects the value at which you might exit, but it does not change the contract’s eventual payout rule.
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4. Close early when the market permits
CFTC guidance and CME descriptions state that positions can generally be traded in and out before completion. To exit, sell the position into available bids or use the venue’s designated close-order function. Your realized gain or loss is the sale value minus your entry cost and fees. A position can be closed for a profit even if the underlying event has not happened, or for a loss even if you still believe your original forecast is correct.
Early exit is not guaranteed. A market with few participants may have a wide bid-ask spread or no buyer at the price you want. A displayed mid-price is not the same as an executable bid, so check the order book and estimated fill before submitting a close order.
Illustrative payoff math
| Position | Entry price | If correct | If incorrect | Gross result before fees |
|---|---|---|---|---|
| Buy Yes | $0.70 | Receives $1 | Receives $0 | $0.30 profit or $0.70 loss |
| Buy Yes (CME example) | $0.45 | Receives $1 | Receives $0 | $0.55 profit or $0.45 loss |
These examples assume a standard binary contract and one contract. Fees reduce the profit or increase the loss, and a different product may use multiple outcomes or a partial payout instead of this all-or-nothing result.
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How an event contract settles
Read the settlement clause before trading
The settlement clause answers questions that a headline cannot. Identify:
- the official result source and any source hierarchy;
- the precise determination date and time, including time zone;
- the person, exchange or committee authorized to make the determination;
- how later corrections, revisions or restatements are treated;
- what happens if the source is delayed, unavailable, contradictory or ambiguous;
- when trading is halted and when the final payout is credited; and
- how to raise a dispute under the venue’s procedures.
The CFTC states that customers are entitled to timely, transparent information about payout, prices, trading rules and “how settlement determinations will be made, who decides, and how.” If you cannot locate those provisions, you do not yet know what you are buying.
The determination process
- Trading reaches its cutoff. The venue stops accepting orders at the time specified in the contract. Some rules allow trading to stop earlier when the event is effectively decided; others keep the market open until a scheduled deadline.
- The authorized source reports or enables the result. The venue applies the named source and any source hierarchy rather than relying on social-media reports, preliminary counts or a trader’s preferred interpretation.
- The decision-maker applies the contract language. If the source issues a correction or the data falls into an exception described in the rules, the venue follows those provisions.
- The venue publishes the settlement determination. The result and effective settlement time are recorded under the exchange or intermediary’s procedures. A stated review or dispute window may apply.
- Accounts are credited or debited. In a standard binary contract, the winning side receives the stated payout—usually $1—and the losing side receives $0. The account balance reflects any fees or adjustments required by the contract.
Why preliminary news may not settle a contract
Election-night projections, initial economic figures and unofficial tallies can change. A contract may require a certified result, a later revised statistic or a specific publication. Until the named source and rule language establish the outcome, a dramatic price move is still a market move, not a final settlement.
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Do not assume every event contract has a single $1-or-$0 payoff. Some listings use several mutually exclusive choices, intervals or partial payouts. The specification may also address cancellations, ties, missing data, postponed events, source revisions or force-majeure situations. In those cases, the published formula—not the usual binary convention—determines the amount credited.
What regulated status changes
In the United States, the CFTC says prediction markets have existed in modern form since 1988 and have been regulated by the agency since 2004. It identifies the Iowa Presidential Stock Market, now the Iowa Electronic Market, as the first modern U.S. prediction market. In 2004, the CFTC approved Hedge Street as the first designated contract market offering binary options.
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| Year | Development identified by the CFTC |
|---|---|
| 1988 | The Iowa Presidential Stock Market, now the Iowa Electronic Market, is identified as the first modern U.S. prediction market. |
| 2004 | The CFTC approved Hedge Street as the first designated contract market offering binary options. |
A regulated exchange or intermediary must satisfy application and examination requirements and follow applicable core principles. The CFTC also describes obligations involving market surveillance, manipulation and insider-trading monitoring, customer-fund handling and disclosures. Those requirements can improve transparency and accountability, but they do not make an individual position safe or profitable.
Regulation is jurisdiction-specific. A contract available to a customer in one country, state or account type may be unavailable or subject to different rules elsewhere. Verify the legal entity behind the venue, its registration and the products it is authorized to offer. CME states that its contracts are listed through brokers, so a customer should review both the broker relationship and the contract documentation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to compare prediction-market venues
Use the following checklist before depositing money or placing an order:
- Wording: Does the question define the event, threshold, place, date and time precisely enough to avoid two reasonable interpretations?
- Settlement source: Is the authoritative source named, and is there a clear order of precedence if sources disagree?
- Decision process: Who makes the determination, when is it published, and what review or dispute path exists?
- Price and probability: What are the current bid, offer and last trade? Treat the quote as an implied probability signal rather than certainty.
- Liquidity: How many contracts are available near the quoted price, and how wide is the spread if you need to exit?
- Fees: Which trading, settlement, withdrawal or data charges reduce the displayed payoff?
- Early exit: Can you sell or close before the event, and what order types are available?
- Jurisdiction and registration: Is the operator authorized where you live, and are there account or product restrictions?
- Customer-fund treatment: What disclosures explain segregation, custody and access to funds?
- Corrections and ambiguity: How are revised data, postponed events, ties, unavailable sources and cancellations handled?
Risks and practical controls
Use only risk capital
A losing binary position can go to zero. Set a maximum amount you can afford to lose and avoid treating an attractive implied probability as a guaranteed return. A $0.90 contract still risks $0.90 per contract if the result is wrong, while its maximum gross gain is only $0.10 before fees.
Account for the full transaction cost
Calculate the payout after commissions and other charges, not from the headline price alone. For an early exit, include the spread between the bid you can sell into and the offer you originally paid.
Watch open positions and rule changes
Keep records of the contract version, determination time and source. Monitor venue notices for corrections, trading halts or updated settlement information. Do not assume that a later news report overrides the contract’s stated source hierarchy.
Check the operator, not just the app
Confirm that the website or application belongs to the registered legal entity named in the disclosures. A familiar interface does not establish authorization, customer-fund protection or availability in your jurisdiction.
Understand tax and record-keeping obligations
Fees, payouts and losses can receive different tax treatment depending on your jurisdiction and account structure. Keep statements showing entries, exits, settlements and charges, then obtain advice appropriate to your location rather than assuming a universal rule.
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A liquid market aggregates the orders of participants who may possess different information and incentives, so its price can be a useful real-time signal. It is still an outcome of a trading mechanism. A sudden order imbalance, a wide spread, limited participation or deliberate manipulation can move the quote without a matching change in the underlying odds.
For that reason, describe a quote as “the market-implied probability” and show the associated payout math. Compare the price with your own estimate, the cost of entering and exiting, and the exact settlement conditions. The contract settles according to its rules, not according to whether the final price looked persuasive in retrospect.
Quick Recap
Key points to remember
- An event contract is a rule-bound claim on a defined future outcome, commonly with a $1 winning payout and a $0 losing payout.
- The quoted price approximates a market-implied probability, but spreads, fees, liquidity and information quality affect how useful that signal is.
- You may often trade out before completion, but an exit depends on available liquidity and the executable bid or offer.
- Settlement follows the named source, determination time, decision-maker and correction procedures in the contract specification.
- Regulated status can bring disclosure, surveillance and customer-protection requirements, yet legality and availability remain jurisdiction-specific.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
