
Data as of Oct 29, 2026, 6:57 PM UTC · policy pm-quality-4
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: Kalshi
Informational venue terms only; CoinRithm paper trading uses its own rules.
Market depth · Before Apr 1, 2027
Loading selected book…
—
Related Markets
Related questions for context, not a comparison of equivalent contracts.
Will a 250-foot triumphal arch be built across from the Lincoln Memorial before Trump leaves office?
Memorial Circle Triumphal Arch (Arc de Trump) Inaugurated by Trump?
Will construction begin on a bridge between Russia and Alaska by the end of 2029?
Will construction begin on a railway or similar transport system on the Moon before the end of 2030?
Texas Senate winner?
2026 Midterms: Congress Balance of Power?
Rules
If construction begins on the proposed United States Triumphal Arch in Washington, D.C. after Issuance and before Apr 1, 2027, then the market resolves to Yes.
Free JSON for this market, no API key needed:
https://api.coinrithm.com/api/prediction-markets/events/kalshi/kxtrumparch-27AI agents: call pm_data_event on the CoinRithm MCP server:
https://mcp.coinrithm.com/mcp+2 more outcomes
+2 more outcomes
+1 more outcomes