TOTAL VOLUME:

$108.2b

24H VOL:

$152,055,584

24H TRANSACTIONS:

1,169,687,206

OPEN INTEREST:

$1,145,837,524

258,359

Markets across

25,163

events

MATCHED EVENTS:

2,062

PLATFORM COVERAGE:

5

Polymarket:

43%

VS.

Kalshi:

57%

BETA
Outcome
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Chance %
Price
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Liquidity
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24h
7d
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Intro

This market tracks whether the film Spider-Man: Brand New Day will achieve a Rotten Tomatoes Tomatometer score of at least 90. The aggregated consensus probability for this outcome is 100.0%, drawn from Kalshi and Polymarket, with resolution based on the film's Tomatometer score as of August 3, 2026 at 10:00 AM ET. Watch for the film's release and critical reviews leading up to the August 3, 2026 resolution deadline.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Kalshi presents 14 redundant threshold conditions with no explicit No resolution or fallback logic, while Polymarket defines four discrete binary markets with complete resolution rules including data unavailability fallback to August 7, 2026.Hero tip: Kalshi's market structure is logically incomplete—it does not specify what happens if the score falls at or below 30, or if data is unavailable. Polymarket provides explicit fallback resolution (No if data unavailable by August 7, 2026 11:59 PM ET). Before trading Kalshi, confirm with the platform whether scores of 30 or below resolve to No, and what happens if Rotten Tomatoes data is missing at the resolution time.

Critical divergence points:

  • Kalshi: 14 overlapping threshold conditions (30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95), all resolving to Yes if exceeded. No explicit No condition defined. No fallback or data unavailability clause. Quote: 'If Spider-Man: Brand New Day has a Tomatometer score of above [X] on Aug 3, 2026 at 10:00 AM ET, then the market resolves to Yes.'
  • Polymarket: Four discrete binary markets at thresholds 80, 85, 90, and 95. Explicit fallback: data checked until August 7, 2026 11:59 PM ET; resolves to No if unavailable. Quote: 'If no data is available by August 7, 2026, 11:59 PM ET, the resolution source will be checked until the relevant data is available. This market will resolve to No if no data is available by August 7, 2026, 11:59 PM ET.'
Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.
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Polymarket

This market will resolve to “Yes” if the displayed Rotten Tomatoes “All Critics” Tomatometer score for Spider-Man: Brand New Day (2026) is at least equal to the specified number at 10:00 AM ET on August 3, 2026. Otherwise, this market will resolve to "No". If, for any reason, the resolution data is unavailable at this market's specified end time, the resolution source will be checked until the relevant data is available. This market will resolve to “No” if no data is available by August 7, 2026, 11:59 PM ET.

Kalshi

Resolution is determined by the film's Rotten Tomatoes Tomatometer score on August 3, 2026 at 10:00 AM ET, the Monday following the wide release. Each market outcome corresponds to a specific threshold: the score must exceed the stated value to resolve as Yes (for example, a score of exactly 75 resolves "Above 75" as No, while 76 resolves it as Yes). The determination uses the official Tomatometer score available on that date and time.

Frequently asked questions

Prediction markets distill dispersed trader knowledge into real-time odds, often capturing sentiment faster than traditional critic aggregates or studio projections. Unlike static analyst reports, this market updates continuously as new information emerges—early reviews, director statements, or box-office signals. Traders with skin in the game tend to incorporate nuance that broad forecasts miss, making market prices a dynamic alternative to pre-release punditry. However, both sources can diverge if one community has access to exclusive information or if sentiment shifts sharply near the resolution window.

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. Each platform attracts traders with different risk appetites, time horizons, and information sets. Polymarket and Kalshi may frame the outcome differently—one focusing on a score threshold, the other on a broader range—leading to distinct pricing. Liquidity depth, fee structures, and user demographics also shape how quickly each venue reacts to news. Arbitrage opportunities can emerge if one platform lags the other, but transaction costs and withdrawal friction often prevent perfect convergence across venues.