Noah Kahan's The Great Divide commands a 100% implied probability on Polymarket for the Billboard 200 #1 spot dated May 16, driven by firm midweek projections showing a second-week hold at 163,000 equivalent album units—down from its record-shattering 389,000 debut but still dominant, fueled by 137,000 streaming equivalent albums (215 million on-demand streams annualized) and sustained vinyl sales momentum from its blockbuster opening, the biggest rock week since 2014. This marks the first rock album for multiple weeks at #1 in years, bolstered by all 21 tracks charting the Hot 100 last frame and Kahan topping the Artist 100. No challengers like Ella Langley's prior Dandelion or holdovers from BTS's Arirang pose threats, with next closest at ~100k units; an upset would require an unprecedented late-week streaming surge or sales anomaly, improbable given the tracking lock-in period nearing its end Tuesday.