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

Platform comparison

Market context

On the Polymarket platform, this contract on the Polygon network currently trades at a 0% probability for "Yes", meaning the market prices in no definitive US government confirmation of extraterrestrial life by the end of 2026. The underlying real-world event hinges on whether the President, a Cabinet member, the Joint Chiefs, or a federal agency will explicitly state that alien life or technology exists, a threshold that has not been met despite recent declassifications.

Historically, US releases of UFO files have failed to cross this line. In May 2026, the Pentagon launched the PURSUE system to release military data on unidentified aerial phenomena, yet officials confirmed the materials were "unresolved cases" with no definitive determination on the nature of the observed objects [1][2]. President Trump encouraged the public to "have fun and enjoy" the files but explicitly stated they contained no confirmed evidence of extraterrestrial life, a stance echoed by astronomers like Seth Shostak who noted there is "no compelling evidence" thus far [1][2].

Traders should monitor the rolling release schedule of the PURSUE website, where more files are expected to be added continuously, and watch for any shift in official language from "unresolved" to "confirmed" [2][3]. A critical catalyst would be a direct statement from the White House or a federal agency definitively asserting alien existence, rather than ambiguous footage of orbs or discs. Recent reporting from the BBC confirms that the latest batch of videos, including one of a shot-down object, still lacks firm conclusions regarding alien technology [2]. Until such a definitive declaration occurs, the on-chain conditional tokens will remain priced at zero for the "Yes" outcome.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Will the US confirm that aliens exist by 2027? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Qué Es, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.