Chart and changes show stored historical probabilities, not the selected live book.
Trends
Selected row: book midpoint. Other rows: stored references, possibly normalized; 24h changes use stored history.
Venue terms
Source: Polymarket
Informational venue terms only; CoinRithm paper trading uses its own rules.
Market depth · December 31
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Related Markets
Related questions for context, not a comparison of equivalent contracts.
Sweden snap election called in 2026?
Serbian presidential election called by which date?
Denmark snap election called by December 31?
Saxony-Anhalt snap election called in 2026?
Will a new legislative election be called in France in 2026?
Will a snap election be called in the UK this year?
Rules
This market will resolve to "Yes" if a writ calling for a parliamentary by-election in a UK parliamentary constituency is issued by the UK Clerk of the Crown in Chancery by the specified date, 11:59 PM ET.
Free JSON for this market, no API key needed:
https://api.coinrithm.com/api/prediction-markets/events/polymarket/next-uk-by-election-called-by-20260914AI agents: call pm_data_event on the CoinRithm MCP server:
https://mcp.coinrithm.com/mcp+2 more outcomes
+17 more outcomes
+12 more outcomes
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