Will the US confirm that aliens exist by 2027?

Platform comparison

Market context

The US government has issued no official confirmation that extraterrestrial life or technology exists, despite President Donald Trump ordering federal agencies to release files on the subject in 2024 and subsequent tranches of data being published under the PURSUE system in 2026 [2][5]. The Pentagon explicitly stated that the released materials represent unresolved cases with no definitive determination on the nature of observed phenomena, reinforcing the current 0% crowd-implied probability for this market [5].

Historically, US disclosures on UFOs have consistently failed to confirm alien origins, with official bodies including the White House, Pentagon, and NASA maintaining they have no reason to believe unexplained objects are extraterrestrial [1]. Previous file releases, including the first tranche in May 2026 and the fourth on 10 July 2026, contained eyewitness accounts and videos lacking sufficient context to prove artificial or alien origin, a pattern that frames the near-zero likelihood of a definitive confirmation before the 2026 settlement deadline [5].

Traders should monitor the PURSUE system for any future tranches, particularly given the fourth release occurred just two days prior to the current date, though no new catalysts have emerged to shift the probability [5][6]. The primary dependency remains an explicit statement from the President, a Cabinet member, the Joint Chiefs, or a federal agency; without such a definitive declaration, the market resolves to No. Crypto macro conditions, including BTC funding rates and USDC liquidity flows, may influence speculative positioning on this binary contract, but the underlying event probability remains anchored to the absence of official government confirmation [5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.