Chow's Win Probability Falls 10 Points in Three Days as Bradford Closes

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Olivia Chow Leads Toronto Mayor Race but Her Odds Drop 10 Points in Three Days

Olivia Chow still leads the 2026 Toronto mayoral race in every public poll, but her implied probability of winning has fallen from 88% to 78% over the past three days on Kalshi and Polymarket, the steepest three-day decline of her campaign. The October 26 vote is now less than three weeks away, and the gap between Chow and Brad Bradford has been compressing steadily since her September 9 campaign launch.

Bradford has no individually tracked contract at this stage, but his implied chance of an upset is roughly 22%, up from approximately 12% just 72 hours ago.

Live market odds

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Who will win the 2026 Toronto mayoral election?

Each outcome's chance, from what traders are paying right now on Kalshi and Polymarket.

Olivia ChowIn this story

53%

KalshiBest price1.89x53¢Polymarket1.89x53¢

Brad Bradford

49%

PolymarketBest price2.04x49¢Kalshi2.00x50¢

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No confirmed catalyst from the last 72 hours explains the repricing. No major new poll has surfaced since the September 30 survey showing Chow at 48% and Bradford at 39%. The move may reflect bettors catching up to a trend the polls have been showing for weeks, or it may be driven by private information, internal polling, or canvassing data that has not reached public view. That uncertainty matters: when a market moves this sharply without an obvious trigger, the next public data point will either validate or reverse the shift.

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Olivia Chow's Prediction Market Price Chart: Three Days of Decline

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The chart shows steady directional selling pressure. Chow's contract declined across all three days rather than gapping down in a single session, a pattern that typically indicates sustained position adjustment rather than a one-off reaction to a headline. On Kalshi her price sits at 77%; on Polymarket, 79%. The two-point spread between platforms confirms the move is consensus rather than platform-specific noise.

At 78%, the market is pricing Chow as a heavy favorite but no longer a near-certainty. For context, 78% implies roughly one-in-five odds that she loses. At 88% three days ago, the implied upset probability was closer to one-in-eight. That is a meaningful shift in how seriously bettors are taking Bradford's candidacy.

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What Are the Latest Polls for the 2026 Toronto Mayoral Election?

Public polls still favor Chow, though the trajectory is moving in Bradford's direction. The key data points form a clear compression pattern.

On September 9, the day Chow launched her re-election campaign, a poll showed her leading Bradford 50% to 39%, an 11-point margin among decided and leaning voters, according to CityNews.

By September 22, after the second mayoral debate, that lead had narrowed to seven points: Chow at 47%, Bradford at 40%. The most recent available poll, dated September 30, showed a partial rebound to a nine-point margin (48% vs. 39%).

Here is the tension: a nine-point lead in a multi-candidate municipal election with three weeks remaining would historically translate to a win probability well above 90%. Yet the market sits at 78%. That gap suggests bettors either expect further tightening that has not yet appeared in public surveys, or they are assigning higher weight to structural factors (low turnout, undecided voters breaking for the challenger) that polls may understate.

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Brad Bradford's Path to Beating Olivia Chow for Toronto Mayor

The strongest case against Chow starts with the trend line, not the snapshot. She has lost four percentage points of her vote share (from 50% to 47-48%) over three weeks while Bradford has gained one (39% to 40%). If that pace of erosion continues linearly through October 26, Chow's lead would compress to roughly three to four points on election day, a margin where turnout dynamics and late-breaking undecided voters could plausibly flip the result.

Municipal elections in Toronto have historically featured low turnout. The 2023 by-election that elevated Chow to office drew about 37% of eligible voters. In low-turnout environments, enthusiasm gaps matter more than raw preference polls. Bradford's challenge is to mobilize voters who may be dissatisfied with the status quo but have not yet committed to showing up. The September 22 debate, where Bradford and Chris Alexander pressed Chow on her record, gave the challenger at least one high-visibility opportunity to make his case.

There is also the question of undecided voters. Polls showing 48% for Chow leave a meaningful share of the electorate uncommitted. In races with an incumbent, undecideds historically break disproportionately toward the challenger: voters who remain undecided this late often know the incumbent well and have chosen not to support them.

That said, Bradford's path remains narrow. He needs to close a nine-point polling gap in 20 days, a task that would require a major Chow stumble, a decisive debate performance, or a structural shift in voter engagement. The prediction market's 78% price for Chow implies the race is competitive but still strongly favors the incumbent.

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What the Market Price Means for the Final Three Weeks

A 78% probability is not a prediction that Chow will win. It is a price reflecting the collective judgment that, across all plausible scenarios from now to October 26, she wins roughly four times out of five. The 10-point drop signals that bettors have identified enough downside risk to reprice, but not enough to call it a toss-up.

The next inflection point will likely be a new public poll. If a survey released in the coming week shows Chow's lead back in double digits, her contract will likely snap back toward 85% or higher. If Bradford closes to within five points, a move below 70% becomes realistic. Track the live pricing on the 2026 Toronto mayoral election market page as new data arrives.

For now, the market is telling a story the polls have been hinting at for a month: this race is real, Bradford is a credible threat, and the outcome is less certain than Chow's incumbency advantage would suggest on paper.