Pronóstico: Will the US confirm that aliens exist by 2027?

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Market context

The US government has never definitively confirmed that extraterrestrial life or technology exists, despite decades of speculation and recent file releases. Polymarket prices this contract at 10% YES today, reflecting the on-chain conditional tokens trading in USDC on the Polygon network, where liquidity remains thin but sentiment is cautious.

Historically, comparable cases frame this low probability: the 2026 Trump-era release of UFO files under the PURSUE system did not confirm alien life, with the Pentagon stating the materials were "unresolved cases" and "no hint, no evidence whatsoever of anything artificial and alien"[2]. Similarly, the 2023 congressional hearing on non-human biologics relied on witness accounts rather than official verification, and no government entity has ever issued a formal announcement confirming extraterrestrial existence[3][4].

Traders should watch for upcoming announcements from the new multidisciplinary science advisory council formed in June 2026 to help resolve the UAP mystery, as its guidance could influence official determinations[1]. The Pentagon has also indicated more documents are "actively being processed for publication" with "more to come very soon," suggesting a potential catalyst before the settlement window ends in December 2026[2]. Any definitive statement from the President, Cabinet, Joint Chiefs, or a federal agency would resolve the market to YES, but current evidence points to continued ambiguity.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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.

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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.