Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Market UK) Pick polygram.ink (preferred broker) |
95% | 5% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
95% | 5% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See 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 actively grinding its way into Kostyantynivka, a pivotal Ukrainian stronghold in the Donbas region that serves as the southern anchor of Kyiv’s eastern “fortress belt.” If Russian forces secure this city, they would gain a strategic gateway to major Ukrainian bastions like Kramatorsk and Sloiansk, enabling a push toward complete control over Donetsk. Despite Moscow’s claims of rapid encirclement, Ukrainian commanders assert the situation remains under control, though approximately 130 Russian soldiers are confirmed inside the city, and frontline monitors describe Kostyantynivka as existing in a dangerous “grey zone” beyond clear control of any party[1][3].
In prediction markets, a YES share represents a bet that the event will occur by the settlement date, while a NO share bets it will not; here, the crowd-implied probability of Russia capturing Kostyantynivka by December 2025 sits at 0%, suggesting traders currently doubt an imminent breakthrough. Historical parallels and recent assessments, including a June 23 report from the US-based Institute for the Study of War, indicate that while Ukraine’s tactical position is worsening, Russian infiltrations are insufficient for a rapid operational breakthrough, framing the current low probability as grounded in military reality rather than mere optimism[2].
Traders should closely watch official announcements from both the Russian defence ministry and Ukraine’s Eastern Operational Command, as well as updates from frontline monitoring projects like DeepState, which recently stated the city’s fall is “a matter of time”[1]. Key catalysts include the pace of Russian gains in the southwestern sector, any new village captures to the west, and whether Ukrainian manpower and resources can sustain the current defensive rate, as Major General Viktor Nikoliuk has noted these factors are critical to Kostyantynivka’s survival[2]. Logistics complications following a potential fall would also make remaining in Kramatorsk “extremely dangerous,” adding strategic weight to the city’s fate[1].
Methodology
We track Will Russia capture Kostyantynivka by 2025? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
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'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.
- 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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