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Prediction markets, polls, and sportsbook-style odds
People often mix three different tools: polls, sportsbook-style odds, and prediction markets. They answer related questions with different incentives. PMI focuses on prediction-market Contracts organized by Event; polls and sportsbooks are useful context, not substitutes.
Polls
Polls estimate opinion or stated vote intention in a sample, at a moment in time. Strengths: transparent methodology (when published), demographic cuts, trend lines. Limits: sampling error, nonresponse, late swings, and the gap between “who would you vote for” and “who wins under election rules.”
A major reputable poll can still matter on an Event page when it is a primary race signal—especially if it frames the race differently than a casual reading of market prices. That belongs in Event Updates or the Event brief, not as PMI “picking a side.”
Sportsbook-style odds
Sportsbooks quote prices to balance books and manage risk. Odds move with money and limits, not only with information. They can be informative, but the product goal is not a pure probability feed for researchers.
Prediction markets
Prediction markets price a Contract that resolves to a defined outcome under written rules. Participants put capital behind views (subject to platform constraints). That can surface information quickly—but liquidity, ambiguous rules, and attention cycles all distort prices.
On PMI, start from the Event, read the brief and Updates, then open the Market or Aggregate hub for the board and terms. Use platform pages when you need the live book. Browse the Events catalog, or open an example such as Brazil presidential election 2026.
Using them together (without mixing them up)
| Tool | Best for | Watch out for |
|---|---|---|
| Poll | Snapshot of opinion / intention | Sample bias; not the same as “wins” |
| Sportsbook odds | Where money is constrained by a book | Limits, vig, book goals |
| Prediction market | Rule-bound outcome prices | Thin books; rule edge cases |
PMI does not convert polls into market prices, and it does not claim prediction markets “beat” polls in every setting. It helps you keep the Contract rules in view while you research the Event.
FAQ
- Are prediction markets more accurate than polls?
- Sometimes they are timely; sometimes they are wrong or thin. Compare tools carefully—accuracy depends on liquidity, rules, and the question.
- Why doesn’t PMI show poll averages next to odds?
- PMI’s catalog is built around platform Contracts and Events. Polls may appear in Event Updates when they are material; they are not a pooled PMI index.
- Can I treat a market price as a forecast I should act on?
- Treat it as one input under that Contract’s rules. Confirm live prices and terms on the platform. This is not advice.
- Where should race-specific analysis live?
- On the Event page (brief + Updates + Markets)—not on these evergreen explainers.
- Does PMI compare Polymarket vs Kalshi prices?
- Not as a product feature today. PMI aggregates and organizes related Contracts under Events; it does not merge or rank cross-platform quotes.
More guides on the Learning hub.