
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 · No
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Related Markets
Related questions for context, not a comparison of equivalent contracts.
Will prediction markets be legally classified as gambling in the U.S. by EOY 2030?
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Law banning sports prediction markets enacted in 2026?
Will "Many prediction markets would be better off a..." make the top fifty posts in LessWrong's 2025 Annual Review?
Will Supreme Court grant certiorari in a sports prediction market case in 2026?
Rules
This market will resolve to "Yes" if, by April 15, 2027, 11:59 PM ET, the IRS or U.S. Department of the Treasury publishes formal guidance classifying losses from CFTC-regulated sports event contracts as subject to the 90% loss cap under Section 165(d) of the Internal Revenue Code, as amended by the One Big Beautiful Bill Act (Public Law 119-21).
Free JSON for this market, no API key needed:
https://api.coinrithm.com/api/prediction-markets/events/polymarket/sports-prediction-markets-taxed-as-gamblingAI agents: call pm_data_event on the CoinRithm MCP server:
https://mcp.coinrithm.com/mcp+47 more outcomes
+15 more outcomes
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+25 more outcomes
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