History. 1 of 7 sessions ended with full-year laws for all 12: 2022. 2014 funded all but Homeland Security, to 27 February 2015, so it counts as NO. Four moved money into the new Congress, and 2018 ended in a lapse.
Hunch. On 9 November NPR reported that passing all 12 full-year funding bills would take time and political will that lawmakers do not have right now.
The full-year market resolves YES if by the end of 31 December 2026, Washington time, laws are in force that fund all 12 yearly spending laws to 30 September 2027. It resolves NO if even one is not funded to that date, with the list of new laws on govinfo.gov and reports in The Guardian and CBS News as sources.
We looked for cases where a US Congress whose majority had just lost an election still had to fund the government before the new Congress arrived. We found seven such sessions, from 1980 to 2024. Each time, money did not run out for a whole day at the first deadline. Once, in 2018, money ran out at the second deadline.