Rihanna’s commanding 99% market-implied odds for #2 Spotify artist in October stem from her consistent second-place ranking in monthly listeners throughout the month, sitting at roughly 117 million as of October 31 behind Bruno Mars while holding a narrow but steady edge over The Weeknd. Her catalog continues to deliver robust daily streams without a new release, underscoring enduring fan engagement and playlist placement that have pushed her to a new listener peak this period. With the month ending imminently, traders see little room for a meaningful shift. An upset would require an extraordinary late surge from a competitor, such as The Weeknd or Justin Bieber, exceeding several million listeners in the final hours—an outcome historical patterns and current trajectories make highly improbable.