SimpleFunctions
Winner-take-all answer·7 source contracts·Kalshi 7·refreshed just now·Closes Aug 31, 2026 · 67d

Artist with the most monthly Spotify listeners at the end of Aug 2026

Leader sits at 69% across 7 bound outcomes, runner-up at 11%. This is a winner-take-all market — the headline is the leader’s price, not an arithmetic mean.

Leader probability

69%

Bruno Mars

runner-up 11¢leader 69¢

Outcomes

7

winner-take-all

Runner-up

11¢

Ariana Grande

Spread

58pp

dominant leader

24h volume

$142

thin orderbook

Closes

Aug 31, 2026

67 days

Venue

Kalshi

7 bound

30-day trend

0%50%100%-30d-3w-2w-1wtodayBruno Mars: 69% (31 days, 30 points)Bruno Mars: 69% on 2026-06-24Ariana Grande: 11% (31 days, 25 points)Ariana Grande: 11% on 2026-06-25Justin Bieber: 3% (31 days, 23 points)Justin Bieber: 3% on 2026-06-24
Bruno Mars69¢Ariana Grande11¢Justin Bieber3¢
Top 3 candidates by current price · 31d

Bracket family

How the bracket ladder is priced.

Each row is one outcome on the venue. Sorted by 24h volume — the heaviest book is at the top.

Analysis

This market tracks who will have the most monthly Spotify listeners when measured at the end of August 2026. Bruno Mars currently leads at 51% probability, suggesting traders see him as slightly more likely than not to maintain or achieve the top streaming position by that date. The current probability reflects uncertainty about streaming momentum over the next three months, with factors including new release cycles, touring activity, and playlist placement all potentially shifting listener counts. The market will resolve definitively when Spotify publishes official listener data for August 2026, eliminating speculation about which artist holds the top position at that specific moment.

  • Bruno Mars' current streaming position and trajectory relative to competitors like Justin Bieber (18¢) and Drake
  • Release timing of new music from major artists between May and August 2026, which typically drives significant listener fluctuations
  • Playlist algorithm changes and editorial decisions at Spotify that can concentrate or disperse listener attention across artists
  • Tour schedules and live performance activity during the May-August period, which correlate with streaming engagement
  • Historical patterns showing whether top-streamed artists typically maintain their position across three-month periods or experience rapid turnover

What moved the line

  • Jun 24Taylor Swift12pp142¢ · Kalshi
  • Jun 22Taylor Swift10pp515¢ · Kalshi
  • Jun 22Bruno Mars7pp6572¢ · Kalshi
  • Jun 19Bruno Mars4pp6569¢ · Kalshi
  • Jun 22Ariana Grande3pp1310¢ · Kalshi

Recently closed in general

These markets stopped trading. Last odds and any captured outcome are shown above — full settlement detail lives at the venue.

More like this

Adjacent prediction questions.

How we compute these odds

SimpleFunctions aggregates live prediction-market contracts from Kalshi and Polymarket. Each slug groups contracts that resolve on the same underlying event, identified by venue event_id.

For binary slugs, the headline probability is the liquidity-weighted mid-price across all bound contracts. For multi-outcome slugs (e.g. elections with 3+ candidates), the headline is the leader’s price; we never arithmetically average disjoint outcomes — that would produce a number with no real-world meaning.

Snapshots refresh every 5 minutes during market hours; daily aggregates are computed at 04:00 UTC. The 30-day sparkline is drawn from per-ticker daily means stored in market_indicator_daily; 24h delta and movement events are derived from the same source.

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