Ukrainian President Volodymyr Zelenskiy warned that Russia could face a difficult winter if negotiations on an energy truce fail to advance. The United States is mediating discussions on a bilateral halt to attacks on energy targets, but Russia and Ukraine have continued striking each other's energy facilities, underscoring the difficulty of securing even a limited ceasefire. The warning follows Zelenskiy's earlier call at the United Nations for stronger measures against Russia before another winter of war, including sanctions targeting its finances and production. He had said Ukraine would intensify attacks on Russia in response to strikes on Ukrainian energy and civilian infrastructure. Market pricing previously put the probability of a Russia-Ukraine ceasefire by Dec. 31, 2026, at 23.5% YES; the latest assessment indicates reduced confidence in an agreement as infrastructure hostilities persist. Statements by U.S. President Donald Trump or Russian President Vladimir Putin, along with official developments in the talks and further energy strikes, remain key indicators for ceasefire expectations.