U.S. agrees to give Ukraine security guarantee by June 30?

Platform comparison

Market context

The United States is currently offering Ukraine a 15-year security guarantee as part of a proposed peace plan, yet the Trump administration’s commitment remains conditional and vague, lacking the binding, Article 5-style mutual defence obligation required for this market to resolve “Yes”[1][10]. Despite Zelenskyy accepting a US ceasefire proposal and expressing gratitude for Trump’s “constructiveness”, the core guarantee language is ambiguous and lapses if Ukraine attacks Russia, even unintentionally[2][3]. Analysts at the Brookings Institution argue that credible US guarantees from Trump are not on the table, citing his history of reneging on contracts and questioning NATO’s Article 5[4].

Historically, comparable cases such as the 2022 US conditional guarantee—where sanctions would be reinstated only if Russia invaded Ukraine—demonstrate that paper pledges without automatic military intervention clauses fail to meet NATO-equivalent standards[8]. The European counterproposal, while rephrasing guarantees as “reliable”, still embeds conditions that invalidate the commitment if Ukraine launches a missile at Moscow without cause[3]. This divergence between sportsbook lines (which often price ceasefire odds at 100%)[9] and the prediction market’s 0% YES probability reflects the crowd’s recognition that no binding, unconditional defence pact exists yet.

Traders should monitor the finalisation of the 20-point peace deal, any explicit language equating the US guarantee to NATO Article 5, and Russia’s response to the ceasefire proposal[1][2]. Recent talks between Zelenskyy and Trump, joined by NATO Secretary General Rutte, suggest postwar security outlines are being fortified, but the settlement window ends 2026-06-30, leaving little time for a formal, mutually agreed binding obligation[6]. Without a publicly announced deal that creates an automatic US duty to defend Ukraine, the market will resolve “No”.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi vs Polymarket, which mirrors the Polymarket order book directly.

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?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.