TOTAL VOLUME:
$114.5b
24H VOL:
$115,807,555
24H TRANSACTIONS:
1,362,287,844
OPEN INTEREST:
$1,188,566,556
336,771
Markets across
33,711
events
MATCHED EVENTS:
4,629
PLATFORM COVERAGE:
5
Polymarket:
42%
VS.
Kalshi:
58%
Mariah Carey
- Polymarket
Mariah Carey - Polymarket
1W
News
Positive
Negative
Neutral
Hover marker for details
Vol.
·
Resolves Dec 31, 2026
Will Mariah Carey have a #1 song on the Billboard Hot 100 in 2026?
$
Intro
This market tracks whether Post Malone will achieve a number one song on the Billboard Hot 100 chart during 2026. Across Polymarket and Kalshi, the aggregated consensus probability stands at 94.0%. Resolution will be determined by official weekly Billboard Hot 100 charts published throughout 2026, with the final relevant chart being the week of January 9, 2027, which captures data through December 31, 2026. Watch for Post Malone's release schedule and chart performance as 2026 progresses to see if any of his songs reach the top position.
PredictionHero - Resolution Divergence Alerts (RDA)
Divergence Detected
Issue: Market structure and scope divergence. Polymarket uses binary achievement logic across 29 artists; Kalshi uses cumulative duration logic for Taylor Swift only. These measure different outcomes and cannot be unified.Hero tip: Treat Polymarket and Kalshi as separate prediction spaces. Polymarket is a broad artist achievement sweep; Kalshi is a Taylor Swift dominance duration bet. A Taylor Swift #1 song resolves Polymarket YES but does not guarantee Kalshi YES unless she accumulates sufficient weeks. Monitor chart weeks separately.Critical divergence points:
- Polymarket: Binary yes/no for each of 29 artists. Resolves YES if artist achieves primary artist credit on any #1 song during 2026 calendar year (chart weeks Jan 17, 2026 through Jan 9, 2027). Features and non-primary credits excluded. Key Quote: 'Any song released with the listed artist as a primary artist will count, including songs released before 2026.'
- Kalshi: Tiered cumulative week-count markets for Taylor Swift only. Seven separate markets resolve YES if Swift spends at least 6, 7, 8, 9, 10, 11, or 12 weeks at #1 position during 2026. Measures duration of chart dominance, not achievement of #1 status.
Polymarket
This market will resolve to “Yes” if any song by the listed artist is the number 1 song in any official weekly Billboard Hot 100 songs chart released for a data collection reference period entirely between January 1 and December 31, 2026. Otherwise, this market will resolve to “No”. Any song released with the listed artist as a primary artist will count, including songs released before 2026. If a song is released jointly by multiple artists credited equally as primary artists, it will count for all of them. Features, writing credits, production credits, or other forms of non-primary contributions to a song will not count. Artist attribution will be determined solely by the artists displayed by Billboard on the relevant chart. Billboard updates its Hot 100 songs chart each Tuesday (with adjusted release schedules on some holiday weeks), reflecting data collected in the previous week (Friday-Thursday). Each Billboard chart is then titled “Week of (date of the upcoming Saturday)”. The first Billboard Hot 100 song chart relevant to this market will be the chart titled “Week of January 17, 2026” for a data collection reference period of January 2-8, 2026. The final Billboard Hot 100 song chart relevant to this market will be the Chart titled “Week of January 9, 2027” for a data collection reference period of December 25-31, 2026. Updates or revisions made within this market’s timeframe to the #1-ranked song on previously published Billboard Hot 100 charts will be considered; however, such updates will not disqualify a previously published Billboard Hot 100 #1 song from counting. If a Billboard Hot 100 #1 song is revised after initial publication, both the originally published #1 song and the revised #1 song will count for this market. Updates or revisions made after the release of the final Billboard Hot 100 song chart relevant to this market will not be considered. The resolution source for this market will be the weekly Billboard Hot 100 songs charts published each week at https://www.billboard.com/charts/hot-100/ and through other official Billboard channels.
Kalshi
Resolution is determined by the total number of weeks Taylor Swift spends at the #1 position on the Billboard Hot 100 during 2026. Each threshold represents a distinct resolution outcome: 6 weeks or more, 7 weeks or more, 8 weeks or more, 9 weeks or more, 10 weeks or more, 11 weeks or more, or 12 weeks or more. The final resolution will correspond to the highest threshold met by her cumulative weeks at #1. Weeks are counted based on official Billboard Hot 100 chart data, where a song holding the #1 position for a given chart week counts as one week toward the total. If Taylor Swift achieves multiple threshold levels, the market resolves according to the highest level reached.
Frequently asked questions
Prediction markets like those tracked here differ from traditional analyst forecasts because they aggregate decentralized trader bets rather than expert opinion. Traders put real capital at risk, creating financial incentives to price outcomes accurately. While music industry analysts may rely on streaming data, radio airplay, and artist momentum, prediction markets synthesize all available information into live odds. This market's prices often move faster than published forecasts when new album releases, chart performance, or industry news breaks. Both approaches offer value, but this market reflects the collective financial conviction of participants betting on actual chart outcomes.
Polymarket and Kalshi may price this market differently due to variations in trader composition, liquidity depth, and contract design. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. For example, one platform might attract more casual music fans while the other draws sophisticated traders, shifting the odds. Liquidity imbalances can also widen spreads, and slight differences in how each platform frames the outcome—such as duration thresholds or chart definitions—may lead traders to value them differently. Arbitrage opportunities sometimes emerge between venues, though transaction costs and withdrawal delays can prevent perfect convergence. Monitoring both platforms gives you a fuller picture of market sentiment.
This market resolves around Dec 31, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution hinges on official Billboard Hot 100 chart data, which is published weekly and widely accessible. Once the year concludes and final chart positions are recorded, the market will settle based on which artists achieved number-one status during the specified period. Traders should monitor Billboard's official announcements and year-end rankings to track progress toward resolution. Any disputes are typically resolved by referencing Billboard's published records and the platform's dispute resolution process.
Major album releases and surprise hit singles are the primary catalysts for price swings in this market. Chart debuts, streaming milestones, and radio rotation announcements can shift odds for specific artists overnight. Award season momentum—Grammy nominations, MTV VMAs, and other industry recognition—often influences trader sentiment. Collaborations between high-profile musicians and unexpected chart entries can reshape expectations. Social media trends and viral moments also drive short-term volatility. Additionally, artist retirements, hiatuses, or public controversies may reduce an artist's odds, while comeback announcements or new label deals can boost them. Tracking music news and Billboard's weekly updates is essential for staying ahead of market moves.