Will the US confirm that aliens exist before 2027?

From each venue's own fee data or published rules (Polymarket: fee schedule on the market; Kalshi: official taker formula). The simple percent is a shorthand—actual dollars still depend on price and size. Hover a venue for full wording.

Polymarket: 4%
Kalshi: 7%

Contract rules

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PPolymarket

Description

This market will resolve to "Yes" if the President of the United States, any member of the Cabinet of the United States, any member of the Joint Chiefs of Staff, or any US federal agency definitively states that extraterrestrial life or technology exists by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No". The primary resolution source for this market will be official information from the government of the United States, however a consensus of credible reporting will also be used.

Close date

Dec 31, 2026

KKalshi

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Description

If the President, any member of the Cabinet, any member of the Joint Chiefs of Staff, or any US federal agency definitively states that extraterrestrial life or technology exists before Jan 1, 2027, then the market resolves to Yes.

Resolution criteria

For purposes of this Contract, the Cabinet includes the heads of the 15 government agencies in the Cabinet as of Issuance, as well the Administrator of the EPA, the President's Chief of Staff, Director of National Intelligence, Director of OMB, Director of CIA, United States Trade Representative, Ambassador to the UN, Chair of the Council of Economic Advisers, Administrator of the SBA, and Director of OSTP.

Close date

Jan 1, 2027