Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
93% | 7% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
93% | 7% | 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 | 93% |
| September 30, 2026 | 86% |
| July 31, 2026 | 59% |
| 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 urban stronghold in eastern Ukraine that serves as the southern gateway to the rest of the Donbas region. If this city falls, Russian forces would bypass Ukraine’s final defensive line, the "fortress belt," and push directly toward Kramatorsk and Slovyansk, the last significant bastions in eastern Donetsk. The crowd-implied probability of Russia capturing Kostyantynivka by the settlement date sits at 0% YES, a figure that starkly contradicts the grim reality on the ground where Ukrainian military personnel describe the area as a "grey zone" beyond the control of any party[1].
Historical precedents from the 2025 capture of Pokrovsk suggest that Russian forces are employing a similar encirclement strategy, infiltrating from the south to sever supply routes and isolate defenders before a final push[2]. While Kyiv’s Brigadier General Oleksandr Bakulin insists the situation remains under control, he acknowledges approximately 130 Russian soldiers are already operating within the city, and independent monitoring by DeepState asserts the fall of Kostyantynivka is "a matter of time"[1]. The consensus appears to be betting on Ukrainian resilience, yet the value spot for a contrarian trader lies in the overwhelming evidence of Russian penetration and the strategic necessity Moscow places on seizing complete control over Donbas[1].
Traders must watch for official announcements regarding the status of the fortress belt and any shifts in the humanitarian situation, as around 2,000 civilians remain cut off from emergency aid[2]. The primary catalyst is the continued Russian advance observed on the northern outskirts, which mirrors the tactics used to isolate Pokrovsk and suggests supply lines are already compromised[2]. With Moscow claiming swift progress in the southwestern section and Kyiv contesting the extent of the encirclement, the divergence between these narratives offers a critical angle for assessing the true likelihood of the city’s capture before the deadline[1].
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 Who Will Win, which mirrors the Polymarket order book directly.
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
- 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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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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