On Sunday night, as rescue workers in Kharkiv were still dousing fires in homes hit by a Russian strike, US President Donald Trump announced something that neither side at war had mentioned: an energy ceasefire between Russia and Ukraine. The claim, delivered without the usual diplomatic choreography of joint statements or confirmed signatures, was enough to send oil prices falling and stock markets in Europe, Asia and the Americas climbing on Monday morning. The reaction from the two governments most directly involved could not have been more different. Ukrainian President Volodymyr Zelensky, whose country had just endured another night of bombardment, said he was still trying to establish what exactly had been agreed.

Moscow, for its part, offered no comment at all, a silence that traders and diplomats alike have read in contradictory ways: as tacit confirmation, as simple confusion, or as a calculated refusal to be bound by an announcement it never made. That investors moved so quickly on so little confirmed detail says something about how desperate markets have become for any sign that the war's disruption to global energy supplies might ease. Oil benchmarks, which have been volatile since the invasion began, dropped sharply on the mere possibility that Russian and Ukrainian energy infrastructure might stop being a battlefield target. Whether that optimism survives contact with the facts on the ground, where strikes on power plants and refineries have continued for years, remains to be tested.

For now, the gap between the announcement and its substance is the story. Kyiv wants specifics: which facilities, for how long, verified by whom.