Taylor Swift’s “Patient Zero,” released September 25 as the lead track from the surprise “The Life of a Showgirl: The Encore” expansion, drives the 99.2% market-implied odds through record-breaking debut streams exceeding 13 million globally on day one and sustained daily totals above 6 million that have kept it atop Spotify’s global chart. Strong fan engagement, multiple simultaneous Taylor entries in the top 10, and historical patterns of Swift tracks maintaining momentum in the first full tracking week underpin trader consensus. An upset would require an unforeseen major release or sharp drop in streams that outpaces current competition from tracks like KAROL G’s “BbY WOW,” though recent data shows limited realistic pathways for that shift before the October 2 close.