2026 Seoul Mayoral Election: Margin of Victory

Prediction market odds on Polymarket often diverge from traditional polling averages because markets incorporate real-money incentives and forward-looking trader expectations. While polls measure voter sentiment at a single point in time, prediction markets reflect dynamic assessments of the actual margin outcome. Traders factor in campaign momentum, undecided voter behavior, and late-breaking developments that polls may not fully capture. Comparing Polymarket odds to Seoul mayoral polling data can reveal whether markets are pricing in a tighter or wider victory margin than current survey data suggests, highlighting areas where market participants expect conditions to shift before Jun 3, 2026.

The market resolves on Jun 3, 2026, following the official Seoul mayoral election. Resolution is determined by the certified final vote margin between the winning candidate and the runner-up. Official election results from Seoul's electoral commission establish which outcome contract is correct. The margin is calculated as the absolute difference in vote totals or vote share between the top two finishers. Once results are confirmed and validated, the market settles according to the outcome that matches the actual margin, and traders' positions are paid out accordingly based on their holdings in the winning outcome.

Major campaign events, leadership changes, or policy announcements by leading candidates can shift market expectations for the final margin. Polling releases showing momentum swings will likely trigger repricing, especially if they suggest the race is tightening or widening. Scandals, endorsements from high-profile figures, or shifts in voter turnout expectations could alter margin projections significantly. Economic developments or national political events affecting Seoul voters may also move odds. Media coverage intensifying as Jun 3, 2026 approaches typically increases trading volume and volatility. Traders continuously reassess margin probabilities based on these signals, causing prices to fluctuate until the election concludes.