TOTAL VOLUME:
$154.4b
24H VOL:
$230,589,906
24H TRANSACTIONS:
2,984,028,936
OPEN INTEREST:
$1,885,293,300
410,482
Markets across
40,213
events
MATCHED EVENTS:
4,340
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 7, 11:59 PM EST
Kalshi
The event tracks Costco's foot traffic performance for September 2026 using a specialized index that compares visitor numbers to the same month in the previous year. The index accounts for variables such as weather patterns, holiday schedules, and seasonal trends to provide a normalized measurement of customer engagement. Higher index values reflect increased traffic compared to the prior year, offering insight into Costco's retail performance dynamics during that period.
All markets in this event are determined by the Carbon Arc Costco Foot Traffic index for September 2026. The index measures year-over-year changes in foot traffic, with 100 representing equal traffic to the same month last year. Values above 100 signify growth, while values below 100 indicate decline. Each market has a specific threshold (e.g., above 94, above 94.5, etc.), and if the reported index exceeds the respective threshold, that market resolves to Yes. The determination is based on the first value reported by Carbon Arc for September 2026. Any corrections or revisions made after the market settlement will not affect the outcome. The index is calculated using mobile location data from over 200 million devices, matched to the same calendar days as the prior year and normalized for seasonality, weather, and holidays. The panel updates daily as new data becomes available.
Compared to traditional analyst forecasts, this market reflects the collective wisdom of traders who bet on Costco's foot traffic each day. While analysts may issue reports based on surveys or historical trends, this market updates continuously as new information emerges — like weather patterns, promotions, or economic data — which can shift expectations faster than formal forecasts.
This market resolves around Oct 15, 2026, with the outcome confirmed once the foot traffic figures are verifiable from credible public reporting. The final numbers will be compared against the market's defined categories to determine which outcome occurred, bringing closure to all positions held at that time.
Events that could shift this market include major Costco promotions, unexpected changes in consumer behavior due to weather or health concerns, and broader economic indicators like gas prices or disposable income trends. Any news that affects shopping habits — whether positive or negative — may cause traders to adjust their positions, moving the odds toward different outcomes.