Russia maintains its long-standing moratorium on nuclear explosive testing amid the Ukraine conflict and broader strategic competition, with recent developments centered on large-scale military exercises rather than detonations. In early October 2026, Moscow conducted strategic nuclear forces drills involving Yars ICBM launches from Plesetsk, submarine-launched missiles in the Barents Sea, and Tu-95 bomber cruise missile releases, alongside a major civil defense exercise simulating reactor accidents near upgraded command facilities. These activities demonstrate operational readiness and escalation signaling but produced no verified nuclear chain-reaction tests. Trader consensus on Polymarket reflects this pattern, assigning low implied probabilities to near-term tests through year-end 2026 due to diplomatic costs, verification challenges, and Russia's preference for non-explosive modernization. Scheduled events such as further force exercises or diplomatic summits could influence sentiment if they alter perceived testing thresholds.