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Will Russia capture Kostyantynivka by July 31?
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© 2026 Prediction Market Network. Market data references Polymarket and Kalshi and may change rapidly.
Prediction markets assign a 63 percent probability that Russia will capture Kostyantynivka by July 31, even as conflicting battlefield reports and dueling official narratives leave the city's status unresolved nine days before the deadline. The market moved 36 percentage points higher in the past 24 hours on $50,033 in trading volume, reflecting intensified speculation following Moscow's July 3 announcement that Russian forces had fully seized the eastern Ukrainian stronghold.
Russian Defence Minister Sergei Shoigu told President Vladimir Putin on July 3 that Kostyantynivka had fallen, a claim Ukrainian President Volodymyr Zelenskyy flatly rejected the following day as "absolutely false." Ukraine's General Staff reported on July 4 that units of the 19th Corps continued defensive operations inside the city and its approaches, while the Institute for the Study of War assessed on July 5 that Russian forces had infiltrated but not seized Kostyantynivka, citing continued Ukrainian presence in northwestern districts. ISW's July 1 analysis estimated Russian forces maintained a presence in approximately 36.98 percent of the city after months of infiltration, but had not established durable control over much of the territory they entered.
The discrepancy between Russian victory claims and independent battlefield assessments highlights the challenge of defining "capture" in contested urban terrain. A BBC report described Kostyantynivka in early July as a "grey zone" where neither side exercised full control, with Ukrainian Brig. Gen. Oleksandr Bakulin insisting the situation remained "under control" and Russian encirclement claims were exaggerated. ISW noted that Russia committed at least one combined arms army, one army corps, and elements of four other armies to the Kostyantynivka offensive as its main effort in the spring-summer 2026 campaign, indicating high priority but also high casualties and slow tactical gains.
ISW assessed on July 4 that Russia's spring-summer offensive had failed to achieve operationally significant results and that the Kostyantynivka assault would likely culminate even if the city were eventually seized. Historical precedent from similarly intense Donetsk Oblast urban battles, including the months-long fight for Bakhmut, suggests that transitioning from partial infiltration to uncontested control typically requires far longer than the 19 days remaining until the market's July 31 resolution date.