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KALSHI
POLYMARKETOpen compare boardDivergencePOLYMARKETKALSHI Prediction MarketsKALSHI POLYMARKET
Catalyst
Will the U.S. confirm that aliens exist
These linked markets share the same catalyst family or an approved cross-source match.
December 31, 2026 at 12:00 AM
2 linked markets
Strongest gap: 60pt
2 linked markets2 sourcesCompare-ready
KALSHIPOLYMARKETWhy these markets are linked
Approved cross-source matches
Approved cross-source matches
1 approved pairs
2 linked markets already have an approved cross-source match inside this catalyst.
Same-day title family
0 same-day family markets
These markets share the same normalized title family on the same catalyst day, which is why they appear together as one upcoming event.
Source structure
2 sources
This catalyst spans multiple prediction platforms, so compare value is available directly inside the catalyst workflow.
Cross-source alignment
When approved matches exist, this catalyst surfaces the strongest agreement and disagreement signals directly on the page.
Polymarket / Kalshi
60pt overall gap
POLYMARKETWill the US confirm that aliens exist by...?
KALSHIWill the U.S. confirm that aliens exist?
Largest differing outcome
Before Jan 20, 2029
Higher probability source
Kalshi
Catalyst schedule
Use the close schedule to understand how this catalyst unfolds across linked markets.
Linked markets by source
Review the linked markets grouped by source instead of as one flat list.
KALSHI1 markets
POLYMARKET1 markets