Pronóstico: Will US withdraw from NATO by 2027?

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Market context

The United States formally initiating withdrawal from NATO under Article 13 of the North Atlantic Treaty remains a remote possibility, reflected in the current 5% crowd-implied probability on Polymarket. This market resolves to "Yes" if the US deposits a notice of denunciation with the US government (as the depositary) by December 31, 2026, triggering a one-year exit window. Historically, no NATO member has ever exited the alliance in its 77-year history, underscoring the political gravity of such a move. While Article 13 provides a straightforward legal mechanism requiring only formal notification, the 2023 Congressional law signed by President Biden now prohibits unilateral presidential exit without a two-thirds Senate majority, creating a significant procedural barrier [7].

Traders should monitor announcements from President Trump, who has recently warned of potential withdrawal citing European reluctance to deploy naval forces in the Strait of Hormuz, alongside legislative developments in Congress [7]. The introduction of HR 6508, the "NATO Act" by Representative Thomas Massie, which seeks to mandate formal withdrawal and cut taxpayer funding, signals growing political pressure but lacks immediate legislative traction [3]. On-chain mechanics on Polygon using USDC and conditional tokens will price these catalysts as they emerge, with liquidity shifting if Trump’s rhetoric intensifies or if Senate votes on the withdrawal prohibition are reconsidered. The settlement window ending in late 2026 leaves ample time for political shifts, yet the legal and diplomatic hurdles keep the probability low.

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Methodology

This page reviews Pronóstico: Will US withdraw from NATO by 2027? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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.

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.

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.