Will the US confirm that aliens exist by 2027?

Platform comparison

Active sub-markets

Market context

The underlying event is whether a top US official—President, Cabinet member, Joint Chief, or federal agency head—will definitively state that extraterrestrial life or technology exists before the end of 2026. No such confirmation has occurred despite recent file releases, leaving the crowd-implied probability at 10% YES.

Historically, comparable cases frame this low probability: the Pentagon’s May 2026 release of over 160 declassified UFO documents explicitly stated there was no definitive proof of extraterrestrial life, calling the cases “unresolved”[1][4]. Similarly, David Grusch’s 2023 congressional testimony about “non-human biologics” was denied by the Pentagon as unsubstantiated, and Dr. Hal Puthoff’s recent claims of four alien species remain unverified by official sources[3][5]. Not once has any government entity formally confirmed aliens[6].

Traders should monitor scheduled releases of further declassified UAP files, as Pentagon spokesperson Sean Parnell confirmed more documents are “actively being processed” and will arrive “very soon”[4]. Key catalysts include any new congressional hearings, official statements from the War.gov PURSUE system, or unexpected announcements from the President or Joint Chiefs. The market hinges on a single, unambiguous official declaration—not speculation, leaks, or insider claims.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.