SimpleFunctions
ClosedLast odds shown below are frozen at close (Jun 19, 2026). Future questions tracked on /odds.
Winner-take-all answer·2 source contracts·Polymarket 2·closed just now·Closes Dec 31, 2026 · 195d

Will the US confirm that aliens exist by...

Leader sits at 10% across 2 bound outcomes, runner-up at 5%. This is a winner-take-all market — the headline is the leader’s price, not an arithmetic mean.

Leader probability

10%

December 31

runner-up 5¢leader 10¢

Outcomes

2

winner-take-all

Runner-up

September 30

Spread

5pp

contested

24h volume

$145K

liquid

Closes

Dec 31, 2026

195 days

Venue

Polymarket

2 bound

30-day trend

0%50%100%-30d-3w-2w-1wtodayDecember 31: 11% (19 days, 9 points)December 31: 11% on 2026-06-11September 30: 5% (19 days, 15 points)September 30: 5% on 2026-06-17
December 3111¢September 305¢
Top 2 candidates by current price · 19d

Bracket family

How the bracket ladder is priced.

Each row is one outcome on the venue. Sorted by 24h volume — the heaviest book is at the top.

Analysis

This probability reflects a less than 1-in-5 chance that the U.S. government will officially confirm the existence of extraterrestrial life by December 31, 2026. The low probability reflects skepticism about formal government confirmation occurring within seven months, despite increased public discussion of UAPs (unidentified aerial phenomena) and ongoing congressional scrutiny. Price variation across contract endpoints—21% for before 2027, 18% for year-end, 13% for September—suggests traders perceive the timeline as the binding constraint rather than the likelihood of confirmation itself. Key drivers include the pace of government investigations, congressional pressure, and the extremely high evidentiary bar required for official confirmation. The most immediate uncertainty centers on whether any congressional or Pentagon disclosures scheduled through 2026 would constitute formal confirmation versus continued ambiguity about UAP origins.

  • Congressional UAP oversight committees have scheduled hearings but have not produced formal government confirmation of extraterrestrial life to date, and the definition of 'confirm' vs. acknowledging UAP unexplainability remains legally unclear
  • The U.S. military and intelligence agencies continue investigating UAPs but have not presented evidence definitively attributing any incidents to extraterrestrial origin, focusing instead on exotic foreign technology or classified aviation programs
  • Contract pricing suggests traders assign higher probability to pre-2027 confirmation (21%) than year-end 2026 (18%), indicating skepticism about the compressed seven-month timeline despite acknowledgment of non-zero possibility
  • Major government reports and declassifications have not previously risen to the threshold of confirming alien existence, establishing an institutional precedent for measured language over extraordinary claims
  • The definition of 'confirm' would require formal, explicit government statement—not inference, suggestion, or acknowledgment of unexplained phenomena—which represents an unusually high procedural and evidential bar

Recently closed in general

These markets stopped trading. Last odds and any captured outcome are shown above — full settlement detail lives at the venue.

Lateral coverage

Thin contract — here's where the deeper coverage is.

This page aggregates 2 contracts (10% headline). At low contract count, the price reflects two participants’ opinions, not a market consensus. The links below are heavier related questions where the orderbook signal is real.

How we compute these odds

SimpleFunctions aggregates live prediction-market contracts from Kalshi and Polymarket. Each slug groups contracts that resolve on the same underlying event, identified by venue event_id.

For binary slugs, the headline probability is the liquidity-weighted mid-price across all bound contracts. For multi-outcome slugs (e.g. elections with 3+ candidates), the headline is the leader’s price; we never arithmetically average disjoint outcomes — that would produce a number with no real-world meaning.

Snapshots refresh every 5 minutes during market hours; daily aggregates are computed at 04:00 UTC. The 30-day sparkline is drawn from per-ticker daily means stored in market_indicator_daily; 24h delta and movement events are derived from the same source.

Last updated on this page: just now.