Taylor Swift’s “Patient Zero,” released September 25 as part of *The Life of a Showgirl: The Encore*, has generated dominant streaming and sales momentum that underpins the 99.6% market-implied odds for the Billboard Hot 100 dated October 10. The track posted record-setting Spotify debuts for a female artist in 2026, multiple days at No. 1 on global and U.S. charts, strong iTunes performance, and a high-profile music-video premiere at the VMAs, giving it clear advantages in the tracking period. Trader consensus reflects these metrics and Swift’s history of opening-week dominance. An upset would require an unforeseen surge from another release or a sharp late-week reversal in consumption data, both considered remote given current figures.