Bonnie Crombie holds a narrow 51.5% implied probability in the Mississauga mayoral market ahead of the October 26, 2026 vote, just ahead of incumbent Carolyn Parrish at 46.5%, with other contenders well behind. The tight positioning reflects a rematch between Parrish, who won the 2024 byelection to succeed Crombie, and the former long-serving mayor, amid polls showing the pair separated by only a few points with substantial undecided voters six weeks out. Recent developments include the first head-to-head debate on business and leadership issues, ongoing exchanges over data centre policy, and polling volatility that has alternated narrow leads. With 14 candidates registered but support concentrated among the top four, trader sentiment remains sensitive to debate performance, consolidation of undecided voters, and any late shifts in local priorities such as infrastructure and economic development.