Beginner Guide

Prediction Markets for Beginners: A Quick, Practical Primer

A short, hands-on guide that shows how to read a market, run the numbers, and follow one contract from buy to settlement.

By Top Prediction Markets EditorialReviewed September 7, 20264 min read

Answer first

Prediction markets express collective expectation as prices. A Yes contract — an event contract that pays $1 if the event happens — priced at 62¢ implies a 62% chance. This primer shows what to check before you buy and walks one concrete buy-to-settlement example with real numbers.

A concrete scenario: a local election contract you can follow

Here's the basic idea. You see a Yes/No market for "Candidate A wins the Nov 3, 2026 mayoral election." A Yes contract — an event contract that pays $1 if the event happens — currently trades at 62¢ and settles once official results are certified on Nov 10, 2026.

Treat this scenario as our running example. Keep these numbers in mind: price = $0.62, payout if correct = $1.00, settlement date = 2026-11-10.

The key thing to know is that the market price is the crowd's current estimate of probability. If you buy one Yes contract at $0.62, the market is saying roughly there's a 62% chance Candidate A wins.

What to check on any market: a quick checklist

When you first open a contract, check these five things before you press buy.

Contract type: Is it Yes/No, scalar (numerical outcome), or multi-choice? For our example it's a Yes/No.
Current price: The displayed price (62¢). That is the implied probability for a Yes/No contract.
Volume and recent trades: More trading volume usually means the price reflects more information. Low volume can mean price is fragile.
Liquidity and spreads: Liquidity tells you how easily you can trade at a fair price. Wide spreads mean buying now could be expensive relative to the quoted price.
Settlement date and conditions: Read exactly what triggers settlement. Some markets settle on official certification, not on media calls.

Always read the contract's settlement rules. The difference between "settles on election day" and "settles when results are certified" can be decisive.

Running the numbers: buying one Yes contract

If a Yes contract costs 62¢ and pays $1 if the event happens, buying one contract costs $0.62. If the event happens, the contract pays $1, so the gain before fees is $0.38. If the event does not happen, the contract expires at $0, so the loss is $0.62.

Put another way:

Cost to buy one contract: $0.62
Payout if correct: $1.00
Net profit if correct: $1.00 − $0.62 = $0.38
Net loss if wrong: $0 − $0.62 = −$0.62

You can show this in a tiny table:

Outcome	Final value of contract	Net result vs. cost
Candidate A wins	$1.00	+$0.38
Candidate A loses	$0.00	−$0.62

If the platform charges a trading fee, subtract that from the net profit. Fees vary, so check the market's fee schedule before you buy.

How the maths shifts if the price moves before settlement

The contract's payout at settlement stays $1 or $0. That never changes. What moves is the price you could buy or sell at before settlement. If you buy and hold to resolution, your final payoff still follows the table above.

The market price is also a real-time summary of new information.

In simple terms: when a credible poll or a news release comes out, traders update their positions and the price moves to reflect the new implied probability.
The key thing to know: a higher price means a higher implied probability, not a guaranteed result.

Common mistake: treating the price as a promise. A market at 90¢ still can resolve to 0 if outcomes change (rare but possible). Another common mistake is ignoring low volume: a change in price on a thin market can be the result of a single large trade, not broad community consensus.

If you want to compare implied probabilities, convert price to percent (62¢ = 62%). For scalar contracts (e.g., "margin of victory"), the math uses the numeric scale shown on the market page.

What happens at each outcome and final steps to check

When settlement arrives, the platform pays $1 per winning contract and $0 per losing contract, according to the market's settlement rules.

In our example:

If Candidate A is certified the winner by Nov 10, 2026, each Yes contract becomes worth $1 and you collect $1 from the platform.
If Candidate A is not certified as the winner, each Yes contract becomes worth $0 and you lose the $0.62 you paid.

Before settlement, confirm two small but important details:

Exact settlement condition: certification vs. media calls.
Settlement date and timezone: platforms differ. Missing the settlement window can affect distributions.

Common beginner pitfalls to avoid:

Confusing price with guaranteed outcome. Markets are probabilistic estimates.
Ignoring liquidity and volume. Low activity can make quoted prices unstable.
Skimming settlement rules. Small wording differences change outcomes.
Anchoring on a single data point. One poll won't necessarily move a well-liquidated market much.

Where to go next

Frequently asked questions

What does a market price mean in plain terms?

The price on a Yes/No contract is the market's implied probability that the event will happen. A price of 0.62 implies about a 62% chance.

How much does it cost to participate?

Cost equals the contract price times number of contracts. Buying one Yes contract at 62¢ costs $0.62 before any platform fees.

Can a market price be wrong?

Yes. Prices are estimates based on available information and can change as new information arrives.

What should I check about settlement?

Check the exact settlement trigger (e.g., official certification), the settlement date and timezone, and any arbitration rules the platform lists.

Are prediction markets legal?

Rules vary by location and platform. See our dedicated guide on whether prediction markets are legal in the US.