Will Russia capture Lyman by December 31, 2026?

The December 31 contract on Russian capture of Lyman is one of the more genuinely uncertain events on the prediction market calendar. The date curve tells the real story: earlier deadlines carry much lower probability, implying that traders see any capture as the product of a sustained grinding offensive across the remaining months of 2026, not a near-term breakthrough. This is a contract about attrition, not surprise. The resolution bar matters here. This contract requires ISW or equivalent mapping sources to show Russia controlling the entirety of Lyman — not contested, not partially held, but fully captured and recognized as Russian-controlled on the authoritative maps that serve as the resolution source. Lyman has been under Ukrainian control since October 2022, when Kyiv's counteroffensive forced a Russian withdrawal that NATO analysts described as one of Moscow's most significant setbacks of the war. Retaking it requires not just reaching the city but clearing and holding it completely — a distinction that has tripped up resolution in similar contracts when partial advances stall short of full control. ISW assessments and Western military analysts have consistently argued that Russia faces significant cost and difficulty in fully seizing fortified towns in eastern Donetsk, with some projecting that complete Russian control of the oblast remains a 2027–2028 scenario at the earliest. That analyst framing sits in tension with the prediction market's assessment — which implies meaningful progress in a theater where advances have been measured in kilometers per month. The contract is a reasonable bet on whether attritional pressure across the second half of 2026 is enough to flip the ISW map, against a Ukrainian defensive posture that has held this sector since October 2022.