In prediction markets a series is a template for recurring events that share the same format and rules, grouping many events and their markets under one heading.
Last reviewed 7 September 2025 · Educational, not advice
Many questions a prediction market asks are not one off. A jobs report comes out every month, a weather reading happens every day, an economic indicator repeats on a schedule. A series is the way some platforms organise those repeating questions. It is best understood as a template: it defines the shared format, the rules, and the settlement source that every recurring instance of that question will use. The series itself is not something you trade. It is the heading under which each new instance appears, already carrying a consistent set of rules.
On platforms that use this structure, the series sits at the top of a three level hierarchy that runs series, then event, then market. The series is the recurring template. An event is a single real world instance of it, for example one particular month of a monthly report or one particular day of a daily reading. A market is a single tradable outcome inside an event, such as a specific threshold that can resolve yes or no. So a weather series might contain a separate event for each day, and each day event might contain several markets for different temperature bands. You place trades at the market level, while the series and event organise everything above it.
Grouping markets this way is useful for a clear reason. Because the format and settlement source are defined once at the series level, every instance stays consistent, which makes recurring events easier to find and compare over time and lets a platform list each new instance quickly without rewriting the rules. For someone following a repeating question, the series is the durable thread, while the individual events come and go as each one settles. This is why a reference site like this one treats recurring questions as enduring topics rather than building a throwaway page for every single instance that expires.
One caution. Series is a structural term, and not every platform uses the word the same way or even uses it at all. The labels for series, events, and markets, and exactly where one ends and another begins, can differ between venues. Treat the description here as the common pattern rather than a universal rule, and read how a specific platform defines its own structure. As always, the structure organises the markets but changes nothing about the risk. Each market within a series can still resolve against you, and the money you commit is genuinely at risk.
Imagine a series for the daily high temperature in a city. The series defines the weather source and the rules. Each calendar day becomes an event, and within that day event there are several markets, one for each temperature band that can resolve yes or no. You trade a band on a given day. Tomorrow the series produces a fresh event, using the very same rules.
Illustrative only. A generic example of the structure, not a description of any specific listed series.
A series is just structure. It does not make any market in it safer, and a recurring format can tempt repeated trading. Stake only what you can afford to lose, never to chase a loss, and never on borrowed money. If it stops feeling like a free choice, step back. In the United States you can call or text the helpline on 1-800-GAMBLER or visit ncpgambling.org.
A series is a template for recurring events that follow the same format and rules, for example a monthly jobs report or a daily weather reading. Each instance becomes an event, and each event contains one or more markets you can trade. Terminology varies by platform, so check how a given venue uses the word.
On platforms that use this structure the hierarchy runs series, then event, then market. The series sets the shared format and settlement source, an event is one real world instance such as a specific month, and a market is a single tradable outcome within that event.
Because many questions repeat on a schedule. Grouping them as a series keeps the rules and settlement source consistent across instances, makes recurring events easy to find, and lets a platform list each new instance quickly without redefining the format every time.
No. Series is a structural term used by some platforms, and the exact meaning and labels can differ between venues. Always read how a specific platform defines its series, events, and markets rather than assuming one convention applies everywhere.
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