97% — Artist with the most monthly Spotify listeners at the end of Aug 2026
Kalshi 97% · 1 contracts · $206 volume · low confidence
Updated 2026-09-20 16:52:12 UTC

Why this matters:
This probability reflects the likelihood that Bruno Mars will have the most monthly listeners on Spotify by August 31, 2026. The 93% confidence level is primarily driven by Bruno Mars' current dominant position on the platform, which has been sustained through consistent streaming and recent releases. The metric would shift down if competitors like The Weeknd, Taylor Swift, or other high-streaming artists release major new projects that capture listener attention in the final weeks of August. The resolution will occur on August 31, 2026, when Spotify publishes official monthly listener counts. Until then, new album releases, viral moments, or shifts in global listener preferences could narrow or widen Bruno Mars' lead. The current contract volume and pricing reflect moderate market confidence in his sustained position.

Key factors:
- Bruno Mars' monthly listener count as of early August 2026 compared to the second and third-ranked artists
- Release schedules for competing artists during August 2026—new albums or surprise drops could shift listener distribution
- Historical volatility in Spotify monthly listeners rankings and typical shifts in the final weeks of a calendar month
- Geographic listener trends and regional playlist dominance that could favor competing artists
- Streaming behavior patterns around specific release dates and promotional campaigns in the final 3 weeks of August

Contracts:
- Artist with the most monthly Spotify listeners at the end of Aug 2026?: Bruno Mars — 97¢ Kalshi $206 (weight 100%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-08-21T01:20:51.944Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "97% per prediction markets (SimpleFunctions, September 2026)"
Canonical: https://simplefunctions.dev/answer/topmonthly
Full data: https://simplefunctions.dev/api/public/query?q=Artist%20with%20the%20most%20monthly%20Spotify%20listeners%20at%20the%20end%20of%20Aug%202026
Provider: SimpleFunctions — https://simplefunctions.dev