Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) Pick polygram.ink (preferred broker) |
95% | 5% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
95% | 5% | 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 |
|---|---|
| December 31, 2026 | 95% |
| September 30, 2026 | 86% |
| July 31, 2026 | 57% |
| May 31, 2026 | 0% |
| August 31 | 0% |
| December 31 | 0% |
| October 31 | 0% |
| September 30 | 0% |
| November 30 | 0% |
| March 31, 2026 | 0% |
| January 31, 2026 | 0% |
| February 28, 2026 | 0% |
| June 30, 2026 | 0% |
| April 30, 2026 | 0% |
Market context
Russia is inching forward in eastern Ukraine, with Russian troops having infiltrated the fortified city of Kostyantynivka, a crucial gateway to the Donbas region. While Russian state media claims full control of the eastern sector, independent analysts describe the area as a disputed "grey zone" where neither side holds definitive command, and small groups of soldiers are entering positions without consolidating strongholds [1][3]. This mirrors the 2025 capture of Pokrovsk, where Russian forces advanced along the flanks to encircle the city and sever supply routes, yet Ukrainian commanders maintain the situation remains under control despite approximately 130 to 250 Russian soldiers operating within the city limits [3][5].
On Polymarket, this contract currently prices at 0% for a Russian capture by the settlement deadline, reflecting the crowd’s view that the Kremlin’s September deadline for seizing Donbas is unlikely to be met given Russia’s sluggish pace [1][2]. Traders should monitor official announcements regarding the "fortress belt" defensive line, which includes four critical cities Russia has yet to capture, and watch for shifts in Russian mechanised assault brigades deploying along the northern flank [2][3]. Recent reports highlight that while Russia is doubling down on tactical gains via infiltration, it may suffer high casualties, and Ukraine’s long-range missile strikes on logistical infrastructure near Crimea are increasingly effective, potentially delaying any breakthrough [2]. The Institute for the Study of War assesses that Russia will likely continue making tactical gains but is unlikely to achieve the strategic goal of capturing the city entirely within the current timeframe [2].
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 UK, 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
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
Trade Will Russia capture Kostyantynivka by 2025? on Kalshi UK
Live order book, 0% fees, USDC settlement in seconds.
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