Recent polling trends and candidate registration for the June 3 local elections have positioned Democratic Party candidate Chun Jae-soo as the frontrunner in the Busan mayoral race. Surveys from late April through mid-May show Chun holding a lead over incumbent People Power Party mayor Park Heong-joon, with margins outside the margin of error in several polls. Campaign clashes over local development projects, candidate approvals, and messaging on economic continuity versus new maritime initiatives have sharpened the contest. Traders appear to weigh these polling dynamics and the broader national context of local races more heavily than Park's incumbency advantage, resulting in Chun's elevated implied probability. Other minor candidates remain marginal factors.