Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) Pick polygram.ink (preferred broker) |
89% | 11% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
89% | 11% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| July 31 | 89% |
| July 15 | 85% |
| June 15 | 0% |
| June 22 | 0% |
| June 30 | 0% |
| July 7 | 0% |
Market context
The Trump administration has already declassified and released multiple batches of files on Unidentified Anomalous Phenomena (UAP), including never-before-seen videos, photographs, and transcripts dating back to the 1940s, rendering the prediction market’s "Yes" outcome effectively impossible given the event has already occurred. On 8 May 2026, the first tranche under the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE) was published via WAR.GOV/UFO, followed by a second release on 22 May and a third on 12 June 2026, containing over 500 documents, audio recordings, and footage of alleged UFOs [1][2][4].
Historically, UAP disclosures have been rare and incremental, such as the Pentagon’s 2017 release of UFO videos, but the PURSUE programme represents a rolling, transparent disclosure process unprecedented in US history, with officials describing it as the start of continuous declassification rather than a single event [2][5]. This context explains why the market currently prices at 0%: the condition for "Yes" — declassifying previously unavailable files — has already been satisfied multiple times before the settlement window closes in June 2026.
Traders should monitor official announcements from the Department of War and PURSUE updates for any further tranches, though no new declassification is required to trigger a "Yes" outcome since the threshold was met in May 2026. Recent reporting by Fox News confirms the administration’s commitment to transparency under PURSUE, with Secretary of War directed to identify and release additional government files on alien and extraterrestrial life [1]. The on-chain mechanics on Polymarket, using USDC on Polygon and conditional tokens, reflect this certainty by pricing the contract at zero, as the underlying event is no longer prospective but historical.
Methodology
This page reviews Trump declassifies new UFO files by 2026? 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 Kalshi UK, 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
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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 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.
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