Boston by Stella Lefty commands overwhelming trader consensus at 92.5% implied probability for the Billboard Hot 100 #2 spot the week of October 3, driven by its commanding streaming velocity, sustained radio airplay, and consistent sales data that have kept it locked near the top of recent tracking periods. Platform metrics and promotional momentum have created a clear frontrunner narrative, mirroring historical patterns where dominant mid-chart performers hold position through chart lock. An upset remains possible if late surges from high-profile releases by Taylor Swift, Morgan Wallen, or Ella Langley deliver outsized streaming spikes or bundle sales that shift the final tally before the September 27–October 3 window closes.