The Socialist Party's July 2026 membership vote to hold a closed primary instead of joining the United Left process, combined with non-participation by La France Insoumise, the Communist Party, and Place Publique, has left only a narrow set of smaller movements committed to the October 11 schedule. Candidate withdrawals by Clémentine Autain and others since that vote have further reduced the field to limited figures such as Marine Tondelier, François Ruffin, and Lydie Massard, meeting the market's explicit cancellation criteria of insufficient participating groups. This sequence of institutional decisions and departures has produced the 92% trader consensus on cancellation. A reversal would require an unanticipated official announcement by the remaining organizers or sudden re-engagement by major parties within the next three weeks, both of which face substantial structural barriers.