Prediction-Market Prices vs Implied Probabilities
Interpret prediction-market prices with fees, payout rules and liquidity context, rather than treating a displayed quote as an objective probability.
Overview
When translating these concepts into an integration, keep the scope described by the wallet history api with the result. The examples in wallet transaction history and smart contract event logs show how the same distinction affects neighbouring data questions.
A prediction-market price can be interpreted through a payout model, but it remains a market observation. Contract rules, fees and execution conditions affect what the number means.
Read the outcome contract
Identify the market, outcome token, quote unit, payout convention and resolution conditions. A price interpreted as probability under a simplified one-unit payout model is not a guaranteed forecast. Spread and depth can separate the displayed quote from the price available for a particular trade size.
Worked example: a simplified binary outcome
An outcome token trades at 0.60 units and would pay one unit if its condition resolves true under the contract. A simplified implied probability is sixty percent before adjustments. That does not mean a sixty-percent factual certainty, nor does it incorporate every fee, timing or resolution risk.
Preserve market state
Record observation time, bid or ask versus executed price, outcome identity and resolution status. Test cancelled or disputed markets and multi-outcome structures. A resolved payout should be linked to accepted resolution evidence. Do not mix outstanding positions, realised payouts and current quotes into one unlabeled probability or profit field.
A practical acceptance test
Use a simplified one-unit payout with bid 0.58, ask 0.62 and last trade 0.60. The displayed interpretation must name its selected quote. Add an unresolved or disputed market and retain that state separately from price. A sixty-percent implied figure must not be presented as an objective probability established by the data service.
Questions about the topic
Frequently asked questions
Is an implied probability an objective truth?
No. It is an interpretation of a market quote under assumptions.
Can bid, ask and last trade differ?
Yes. Name which observation the displayed value uses.
Standards & technical documentation
