Beginner
How Do Prediction Markets Work?
Prediction Markets can look like betting, but their legality comes down to regulation, jurisdiction, and what the contract is actually classified as.
This guide is for educational purposes, not legal advice. U.S. rules and enforcement positions can evolve, and availability may vary by state.
Before trading, you should review the rules that apply in your jurisdiction and confirm that any platform you use is authorized to operate in the United States.
This guide will explain:
- What you are buying and selling in a regulated prediction market
- How platforms turn outcomes into tradable contracts that settle to $1 or $0
- How market prices are formed, and why platforms often show percentages first
- How a trade is matched, and why execution can differ from what you expect
- The two ways a position ends: exiting early or holding to settlement
Understanding how prediction markets work
Prediction markets work by letting people buy and sell contracts whose value depends on a specific real-world outcome, where each contract settles to $1 if the outcome happens and $0 if it doesn’t. The current market price is set by traders, not by the platform.
Trading a contract that settles to $1 or $0
In a regulated prediction market, every market starts with a tightly worded question, like:
- Will Republicans control the U.S. House after the 2026 midterm elections?
- Will the Atlantic hurricane season produce more than 15 named storms this year?
- Will a Marvel movie gross over $1 billion worldwide in 2026?
The market then offers contracts tied to that question. The simplest mental model is:
A “Yes” contract is worth $1 at settlement if “Yes” turns out to be true, and $0 if not.
A “No” contract is worth $1 at settlement if “No” turns out to be true, and $0 if not.
When you trade, you’re choosing a side and a price. If, for example, you pay $0.62 for a Yes contract, you’re paying $0.62 now for something that will later be worth either $1 or $0.
Once you see these as contracts with a defined settlement value, you stop thinking in sportsbook terms like “odds” and start thinking in tradable prices: what am I paying, what might I receive, and can I exit before the end?
The exchange model: traders set prices, the platform runs the market
A regulated prediction market platform is best understood as a marketplace, not 'the house'.
- Traders set prices by placing orders to buy or sell at specific prices.
- The platform lists the contract, provides rules and the trading interface, and matches trades when buyers and sellers agree on price.
- At the end, the platform follows the contract’s settlement rules to determine whether contracts settle to $1 or $0.
If you’ve ever used a stock exchange, the roles feel familiar: people submit orders, trades get matched, and prices move as the market digests information. The difference is that instead of shares in a company, you’re trading an outcome-based contract that resolves to a fixed amount.
Because this guide focuses on legally accessible markets, we’re only discussing the inner-workings of prediction markets in the CFTC-regulated lane.
If you want the full legal context and what regulated means in practice, you can learn more in our Are Prediction Markets Legal? guide.
What you’re actually trading in a regulated prediction market
Before you place a trade, you should be able to point to the contract and answer two questions:
- What exactly must happen (and by when)?
- How does this market decide what happened?
If you can’t answer those, you’re not trading a product you understand.
The contract’s key parts: the question, timeframe, and settlement rule
Every market has “specs.” Platforms may present them differently, but the essentials are consistent:
- The question: the outcome being tested
- The timeframe: when the market stops trading and/or when the outcome is measured
- The settlement rule: what counts as “Yes” or “No”
- The resolution source: where the market gets the official result (a specific authority, dataset, or publication)
Most beginner blow-ups aren’t about being wrong on the outcome; they’re about misunderstanding what the contract actually asked. You don’t need to memorize legal terminology to use prediction markets safely, but you should get into the habit of checking the specs before you click buy, in order to avoid the “I thought it meant X” problem.
If you want a deeper glossary refresher for terms you’ll see across the platform, check out our Prediction Markets Terminology guide.
How “Yes” and “No” map to payout
In the simplest structure, each contract resolves to a fixed payout:
- If the outcome is true, Yes → $1, No → $0
- If the outcome is false, Yes → $0, No → $1
That’s why you’ll often see prices quoted between $0 and $1 (commonly as cents). A Yes contract trading at 62¢ is a contract that currently costs $0.62 but will later become either $1.00 or $0.00.
This comes with two practical implications:
- Your max profit is capped. If you buy Yes at 62¢ and hold to settlement, the most you can make on that contract (before fees) is $1.00 − $0.62 = $0.38.
- Your max loss is defined upfront. If you buy at 62¢ and the outcome goes against you, you lose up to $0.62 (again, before fees).
This “bounded” payoff is one reason prediction markets can be easier to reason about than many other trading products: you know the endpoints from the start.
Prices in prediction markets: what they mean and why they move
Prices are the language of the market. If you can interpret the price correctly, you can interpret everything else: risk, potential payout, and why your position is gaining or losing value before the event resolves.
Cents pricing in plain English
Most regulated prediction markets display price like 62¢ instead of $0.62, but it’s the same idea.
A simple translation table:
- Yes at 10¢: pay $0.10 now; settle at $1 if Yes, $0 if No
- Yes at 62¢: pay $0.62 now; settle at $1 if Yes, $0 if No
- Yes at 95¢: pay $0.95 now; settle at $1 if Yes, $0 if No
So what does the price mean?
- This is the price where a buyer and seller are currently willing to trade.
- It reflects how market participants are weighing the available information right now.
If you’re coming from sports betting, it helps to drop the word “odds” and use “price.” Odds are posted. Prices are discovered.
How platforms display prices
Many regulated platforms show a percentage on the market list because it is fast to scan. When you open a market to trade, you will usually see the actual contract price in cents, because that is what determines your payoff. Some platforms may also show a payout multiple next to the percentage as a convenience.
These are different ways of describing the same thing:
- Price: what you pay for one contract right now
- Implied probability: a probability-style reading of that price
- Payout multiple: a shorthand for payout relative to amount paid, before trading costs
When you are deciding whether to trade, treat price as the real input. The percentage is a summary view, and your net result will also depend on costs like fees and the spread.
Why prices move
Prices move for two broad reasons:
- New information is released - A poll drops, a report is released, a court ruling happens, a weather model shifts - anything that changes how traders assess the outcome can change what they’re willing to pay.
- Orders hit the market - Even without news, price can move because traders place orders that consume the available liquidity at the best prices. If there aren’t many sell orders available near 62¢ and someone aggressively buys, they may push the price up simply by taking what’s available.
What changes for you in practical terms: you can be right eventually and still see your position move against you in the short term, because price reflects the market’s current balance of information and orders - not the final outcome.
Implied probability - useful interpretation, not a promise
You’ll often hear people treat the price as a probability. A 62¢ Yes contract is commonly described as “about a 62% chance.”
That shorthand is useful as long as you remember what it is:
- It’s market-implied probability: how the market is pricing the contract right now.
- It’s not a guarantee.
- It can be wrong, biased, or temporarily distorted - especially in thin markets.
How a trade happens: orders, matching, and fills
A prediction market trade is not a button that says yes or no. It is a match between a buyer and a seller at a specific price. Understanding that one point will make the rest of the experience feel predictable instead of random.
The Order Book - Bids, Asks, & Spread
Most regulated prediction markets use an order book. That is just a live list of:
- Bids: prices people are willing to pay to buy
- Asks: prices people are willing to accept to sell
The best bid is the highest buy price currently offered. The best ask is the lowest sell price currently offered. The gap between them is the spread.
What changes for you in practical terms:
- If you buy immediately, you generally buy at the ask.
- If you sell immediately, you generally sell at the bid.
- In a market with a wide spread, the price you see on a list page can feel different from the price you actually trade at.
This is also why two people can look at the same market and disagree about what the price is. One might be looking at the best bid, another at the best ask, and the platform might show a mid price or a last traded price.
For beginners, the reliable approach is to look at the prices available in the order book at the moment you place the trade.
Market vs limit orders
Most platforms let you place two basic kinds of orders:
- A market order says: fill my order immediately at the best available price.
- A limit order says: fill my order only at this price or better.
The beginner-safe rule is simple: if the market is thin or the spread is wide, use a limit order. A market order can fill at a worse price than you expect because it will take whatever liquidity is available, even if that means climbing the order book to higher asks or lower bids.
You do not need to master advanced order types to understand how prediction markets work. You only need to know that you control your price with a limit order, and you trade speed for certainty with a market order.
Why liquidity matters
Liquidity is how easily you can trade at a reasonable price without moving the market.
A market can be accurate in the long run but still be painful to trade if liquidity is low. In a low-liquidity market you will notice:
- Wider spreads
- More slippage, meaning your order fills at worse prices than you expected
- Difficulty exiting without giving up a lot of value
What changes for you in practical terms: your biggest risk is not only being wrong about the outcome. It can be entering a position you cannot exit at a fair price. That is why liquidity is part of the basic mechanics, not an advanced topic.
How you profit (or lose): holding vs exiting early
Once you understand the $1 or $0 settlement rule and the fact that prices move, profit and loss becomes straightforward. There are only two ways your position ends.
Path 1: hold to settlement
If you hold a contract through the end, your result is determined by settlement.
Example: you buy Yes at 62¢ and hold.
- If the outcome happens, the contract settles at $1.00
Profit before costs: $1.00 − $0.62 = $0.38 per contract- If the outcome does not happen, the contract settles at $0.00
Loss before costs: $0.62 per contract
This is the cleanest way to think about the product because you can see the maximum profit and maximum loss at the moment you enter.
Path 2: sell before the event ends
You are not required to hold to settlement. If there is liquidity, you can exit early by selling your position back into the market.
Example: you buy Yes at 40¢. Later, the market moves and Yes trades at 55¢.
- If you sell at 55¢, your profit before costs is: $0.55 − $0.40 = $0.15 per contract
This is the most important practical point for many new users: you can be wrong about the final outcome and still profit if the market moves your way and you exit. You can also be right about the final outcome and still lose money if you buy too high and then panic-sell lower.
The simplest P/L math example
Here is the core math, stripped of everything else:
- Your profit or loss depends on your entry price and your exit price.
- If you hold to the end, your exit price is replaced by settlement at $1 or $0.
- Multiply the per-contract result by the number of contracts you traded.
Example:
You buy 100 Yes contracts at 62¢. Your cost is $0.62 × 100 = $62.
If the outcome happens and you hold to settlement:
- Settlement value: $1.00 × 100 = $100
- Profit before costs: $100 − $62 = $38
If you instead sell those 100 contracts later at 70¢:
- Sale proceeds: $0.70 × 100 = $70
- Profit before costs: $70 − $62 = $8
What changes for you in practical terms: once you can do this math quickly, you can stop relying on the platform’s green or red numbers to tell you what is happening. You will understand exactly how your position behaves and what would need to happen for you to exit profitably.
Settlement and payouts: how markets end
A prediction market does not end when people get bored of trading it. It ends when the contract’s rules say it ends, and then every open position is converted into a final value.
The key point is that settlement is mechanical. It follows the contract specs.
What is a settlement and what triggers it?
Settlement is the process where the platform determines the outcome and converts contracts into their final value:
- Winning side settles to $1.00 per contract
- Losing side settles to $0.00 per contract
What triggers settlement depends on the contract, but it usually follows a pattern:
- The market reaches its end time or the event occurs
- The platform checks the specified resolution source
- The platform posts the final result and settles positions
What changes for you in practical terms: if you hold a position through settlement, you are no longer exposed to price swings. Your result is locked by the outcome and the contract’s rules.
What to check before you trade: the contract specs and resolution source
In a regulated market, the contract specs are not decoration. They are the rulebook that decides whether you get paid.
Before you trade, scan for these items:
Small wording differences can change what counts as Yes.
Some markets stop trading before the outcome is known. Some measure at a specific timestamp.
The contract should tell you what counts as official.
For example: a final certified result versus an early projection.
Many specs include a fallback process.
Most avoidable disputes come from not reading specs. When you treat specs as part of the product, you trade fewer surprises.
Ari started his gaming career as a poker grinder, then a crypto trader, before stumbling onto prediction markets. He’s now deep into betting on everything from politics to pop culture to tech layoffs. If it has uncertainty and odds, Ari’s in.
Skeptical by nature, Ari is fully convinced that the weirdest bets often hide the sharpest edges. If you’ve ever wondered whether it’s possible to beat the market by reading the news better than everyone else - Ari’s here to show you how.
