Pronóstico: Will US withdraw from NATO by 2027?

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Market context

The United States formally initiating a withdrawal from NATO or providing an official notice of denunciation by the end of 2026 remains a distant possibility, reflected in the current 5% crowd-implied probability on Polymarket. This contract, priced in USDC on the Polygon network using conditional tokens, treats the event as a binary outcome where a "Yes" resolves only upon the submission of formal notice under Article 13 of the North Atlantic Treaty, regardless of subsequent judicial delays.

Historically, no NATO member has ever exited the alliance in its 77-year existence, establishing a strong precedent against such a move. While Article 13 permits withdrawal after a one-year notice, the 2023 congressional law signed by President Biden explicitly prohibits a unilateral exit without a two-thirds Senate majority, creating a significant legal barrier that has not been overcome despite recent legislative attempts by Senators like Mike Lee and Representatives like Thomas Massie to force a withdrawal [1][2][5].

Traders should monitor the Trump administration's rhetoric regarding European allies' reluctance to deploy naval forces in the Strait of Hormuz, which President Trump cited in April 2026 as a potential justification for withdrawal [5]. The primary catalyst remains whether the administration can secure the necessary Senate supermajority to override the 2023 statutory ban, as no executive order alone can satisfy the treaty's denunciation requirement under current US law [5][7]. Any shift in the Senate's composition or a sudden legislative push to repeal the 2023 defence act would be the definitive signal for this market to move.

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

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 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.

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.