BTS’s “Swim,” the lead single from the group’s March 2026 comeback album Arirang, entered the Best K-Pop market as a heavy favorite after debuting at No. 1 on the Billboard Hot 100 and securing multiple major nominations. Traders priced the track at 96.7% implied probability on the strength of BTS’s full-group reunion following military service, its unmatched historical record in the category, and the voting power of ARMY. Strong streaming metrics, critical acclaim for the album’s uptempo sound, and consistent frontrunner status in precursor fan and industry polls reinforced the consensus. An upset would have required an unexpected late surge from a competitor such as BLACKPINK’s “Jump,” Lisa’s “Dream,” or Le Sserafim’s collaboration, but no such momentum materialized before the September 27 ceremony.