Will the US confirm that aliens exist by 2027?

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Market context

The underlying real-world event is President Donald Trump’s June 2024 directive to federal agencies to declassify and release government files on aliens, followed by the first release of records in May 2026 that explicitly did not confirm extraterrestrial life. Despite public excitement, the Pentagon and Trump stated the documents contained unresolved cases, with no definitive determination on the nature of observed phenomena, and included obvious explanations like balloons[2][3]. A new multidisciplinary science advisory council has now formed to help the US government resolve the unidentified anomalous phenomena mystery, aiming to determine whether sightings represent national security threats or major discoveries[1].

Historically, no official government entity has ever formally confirmed the existence of extraterrestrial life, despite repeated claims and whistleblower statements that lack credible verification[4]. The 2026 file release, part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE), set a precedent where transparency increased without confirmation, leaving the public to draw their own conclusions[3]. This pattern frames the current 10% crowd-implied probability as realistic: while file disclosures are ongoing, the threshold for definitive confirmation remains unmet, with experts like Seth Shostak of the SETI Institute affirming there is no compelling evidence yet[3].

Traders should watch for the second and subsequent document releases, which Chief Pentagon spokesperson Sean Parnell confirmed are actively being processed for publication, with more expected soon[3]. The newly formed science advisory council’s findings, scheduled to guide UAP investigations through 2026, could serve as a catalyst if they identify extraterrestrial activity or technology[1]. Additionally, any definitive statement from the President, Cabinet, Joint Chiefs, or a federal agency before December 31, 2026, would resolve the market to “Yes,” making the council’s interim reports and the ongoing declassification schedule critical dependencies to monitor[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Will the US confirm that aliens exist by 2027? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

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.

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.