Toronto mayoral odds slide 14 points against Olivia Chow as the race tightens
Quiet quarter-hour — no significant new platform headline in the last 15 minutes, so this fresh election repricing leads, in a different category from the previous three…
Olivia Chow remains the favorite to win Toronto’s October 26 mayoral election, but prediction markets have reduced their confidence sharply. According to prediction.com’s October 8 report, her implied win probability fell from 88% to 74% on both Kalshi and Polymarket over the preceding three days—a 14-percentage-point decline.
A polling lead, with less room to spare
Chow led Brad Bradford in every published poll cited by prediction.com, with advantages ranging from 9 to 17 points depending on the survey and which voters were included. Those results still put her ahead, even as the market repricing signaled greater uncertainty about the outcome.
A September 30 CityNews/Léger poll put Chow’s approval at 48%, down from 51%, and showed a 9-point lead over Bradford. A separate September 29 survey gave her a 17-point advantage among decided voters, according to prediction.com.
No single reported trigger
Prediction.com identified no publicly reported event large enough to explain the market move on its own. Its analysis instead pointed to traders reassessing a gradual deterioration in Chow’s standing, alongside Bradford’s consolidation of opposition support.
The timing matters: the 88%-to-74% move was described in the October 8 report, rather than established as a fresh change on October 13. At the reported 74% level, Chow remained a substantial favorite; the repricing increased the market’s assessment of her vulnerability without making the contest a toss-up.
What it means for prediction markets
- Probability is not vote share. Chow’s reported 74% market probability measures her chance of winning, not the proportion of ballots she is expected to receive.
- The surveys are not directly interchangeable. The reported 9-to-17-point polling range reflects differences in surveys and voter screens, including the September 29 focus on decided voters.
- The catalyst remains uncertain. Prediction.com’s explanation centers on accumulating polling and approval concerns, not a confirmed single-event trigger.
- Keep the dates aligned. The cited repricing belongs to the three-day period covered by the October 8 report; the supplied material does not establish a new October 13 market move.
- Prediction (prediction.com)https://prediction.com/news/chow-still-leads-toronto-but-markets-cut-oct-08-2026