KalshiCheck availabilityKYC required2% feeVerified resolution dataFairly calibratedData quality warningNo trading activity
Data as of Sep 8, 2026, 7:10 PM UTC · policy pm-quality-3
Current implied probability
Above 91 0%Leader of 9 outcomes
Market quality
24 / 100
Low quality24h Volume
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Liquidity
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Liquidity unknownSpread
98.0 pt
Wide spreadMarket data
Updated 4 minutes ago
Aug 28, 26, 4:00 PM UTCOct 7, 26, 2:29 AM UTC
Trends
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Rules
If the Carbon Arc Costco Credit Card Spend (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 Costco Credit Card Spend was equal to the same month last year.
- Values the named outcome 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 aggregated U.S. credit and debit card transaction panel, matched to the same period of the prior year.
Open markets
Business & Corporate
POLYMARKET$LAPTOP FDV above ___ one day after launch?
- $10M+9.8pt96%
- $25M+15.5pt94%
- $50M+31.5pt86%
+4 more outcomes
- Total Vol
- $354.3K
- 24h Vol
- $354.2K
POLYMARKETElon Musk # tweets September 7 - September 9, 2026?
- 40-64+4.0pt50%
- 65-89+27.0pt47.1%
- 90-114-2.4pt2.9%
+7 more outcomes
POLYMARKETLargest Company end of December 2026?
- NVIDIA+1.0pt78.4%
- Apple+0.6pt13.7%
- Alphabet6.9%
+5 more outcomes
KALSHIWashington aerospace manufacturing employment average in 2026
- Above 80,000 jobs98%
- Above 81,000 jobs95%
- Above 82,000 jobs+3.0pt92%
+10 more outcomes
- Total Vol
- $213.5K
POLYMARKETElon Musk # tweets September 8 - September 15, 2026?
- 180-199-1.0pt18.2%
- 200-219-1.0pt18.2%
- 160-179+1.0pt14.1%
+23 more outcomes
POLYMARKETLargest Company end of September?
- NVIDIA+0.3pt98%
- Apple-0.2pt2%
- Alphabet0%
+6 more outcomes
- Boeing commercial airplane deliveries in 2026
- California FAIR Plan policies in force on September 30, 2026
- Elon Musk # of tweets in September 2026?
- Illinois nuclear electricity generation in 2026
- 3rd Largest Company end of September?
- Variational FDV above ___ one day after launch?
- Largest IPO by market cap in 2026?
- OpenAI IPO Closing Market Cap
- First to hit $1B FDV: ANSEM, CASHCAT, AI, or NET?
- Taco Bell same-store sales growth in Q3
- Will GameStop acquire eBay in 2026?
Frequently asked questions
- What are the current odds for Costco Credit Card Spend in September?
- Kalshi prices Above 91 at 0% as of September 8, 2026.
- When does Costco Credit Card Spend in September resolve?
- Costco Credit Card Spend in September is scheduled to resolve on October 7, 2026.
- How is Costco Credit Card Spend in September settled?
- Kalshi settles this market as follows: If the Carbon Arc Costco Credit Card Spend (September 2026) for September 2026 is the named outcome, then the market resolves to Yes.