Olivier Faure, the Socialist Party first secretary, leads implied probabilities for second place in the October 9-10 first round of the social-democratic primary because traders view him as the strongest institutional candidate behind frontrunner Raphaël Glucksmann of Place Publique. The five-candidate field, narrowed after Philippe Brun’s exclusion over conduct allegations, features limited polling differentiation among the remaining contenders. Recent televised debates on France 2 and LCI have highlighted Faure’s organizational edge and party resources, while Glucksmann maintains broader name recognition ahead of the 2027 presidential contest. Lower probabilities for Ségolène Royal, Emmanuel Maurel, and Jérôme Guedj reflect their narrower support bases within the closed primary electorate of roughly 140,000 registered voters. The two-round electronic vote concludes its first stage within 48 hours.