KalshiCheck availabilityKYC requiredVerified resolution dataFairly calibratedCurrent implied probability
Above 101 99%+1.0ptLeader of 9 outcomes
Above 101 99%+1.0ptMarket quality
70 / 100
Medium quality24h Volume
$12.2K
Open interest
$20.7K
Medium open interestSpread
1.0 pt
Tight spreadMarket data
Updated 9 minutes ago
Aug 28, 26, 10:00 PM UTCOct 3, 26, 3:59 AM UTC
Trends
Venue terms
Source: Kalshi
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Early close:
- Yes
- Settlement timer:
- 30m (informational)
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Related questions for context, not a comparison of equivalent contracts.
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PolymarketRules
If the Carbon Arc on! Point of Sale Growth (September 2026) for September 2026 is the named outcome , then the market resolves to Yes.
Settles via:Carbon Arc
- For purposes of this market, determination will resolve on the first value reported by Carbon Arc.
- Corrections or revisions made after the market has been settled will not affect the outcome.
- The index measures year-over-year change, where 100 means on! Point of Sale Growth was equal to the same month last year.
- Values above 100 indicate growth and values below 100 indicate decline: for example, 103 = 3% more spend than year prior, 97 = 3% decline from year prior.
- The index is measured by Carbon Arc's point-of-sale receipt panel using in-store and online purchases captured via receipt-scanning and rewards apps, matched to the same period of the prior year.