TOTAL VOLUME:

$154.6b

24H VOL:

$333,432,169

24H TRANSACTIONS:

2,984,640,614

OPEN INTEREST:

$1,971,286,090

419,492

Markets across

40,634

events

MATCHED EVENTS:

4,654

PLATFORM COVERAGE:

5

Polymarket:

37%

VS.

Kalshi:

63%

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Broadline Retail Ad Spend in September
kalshi

Will ad spend rise in September?

Volume:
$41,910

Above 117

 - Kalshi

Above 117 - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Oct 6, 2026

Closed: Oct 5, 11:59 PM EST

kalshi

Kalshi

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Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Above 117

View
100%
3%
Yes 100¢No 0¢
—
N/A
$5,211
N/A
N/A
$1,065
Settled
Yes
kalshi

Above 111

100%
Yes 100¢No 0¢
—
N/A
$4,164
N/A
N/A
$912
Settled
Yes
kalshi

Above 109

100%
Yes 100¢No 0¢
—
N/A
$3,847
N/A
N/A
$2,937
Settled
Yes
kalshi

Above 123

100%
Yes 100¢No 0¢
—
N/A
$3,646
N/A
N/A
$2,198
Settled
Yes
kalshi

Above 133

100%
6%
Yes 100¢No 0¢
—
N/A
$3,505
N/A
N/A
$1,096
Settled
Yes
kalshi

Above 131

100%
Yes 100¢No 0¢
—
N/A
$3,297
N/A
N/A
$3,019
Settled
Yes
kalshi

Above 119

100%
Yes 100¢No 0¢
—
N/A
$3,131
N/A
N/A
$1,007
Settled
Yes
kalshi

Above 121

100%
Yes 100¢No 0¢
—
N/A
$3,046
N/A
N/A
$1,627
Settled
Yes
kalshi

Above 129

100%
2%
Yes 100¢No 0¢
—
N/A
$2,332
N/A
N/A
$1,381
Settled
Yes
kalshi

Above 125

100%
Yes 100¢No 0¢
—
N/A
$1,488
N/A
N/A
$757
Settled
Yes
kalshi

Above 115

100%
3%
Yes 100¢No 0¢
—
N/A
$809
N/A
N/A
$507
Settled
Yes
kalshi

Above 127

100%
Yes 100¢No 0¢
—
N/A
$661
N/A
N/A
$453
Settled
Yes
kalshi

Above 113

100%
Yes 100¢No 0¢
—
N/A
$356
N/A
N/A
$256
Settled
Yes
kalshi

Above 135

0%
6%
Yes 0¢No 100¢
—
N/A
$3,178
N/A
N/A
$2,682
Settled
No
kalshi

Above 137

0%
5%
Yes 0¢No 100¢
—
N/A
$2,539
N/A
N/A
$2,393
Settled
No
kalshi

Above 139

0%
6%
Yes 0¢No 100¢
—
N/A
$700
N/A
N/A
$659
Settled
No
Total markets: 16

Description

This set of markets tracks the performance of broadline retail advertising expenditures for a specific month, comparing them against the same period in the previous year. The index provides a clear indicator of whether advertising spending has increased or decreased relative to the prior year, with different thresholds defining various levels of growth.

Kalshi

All markets in this event are determined by the Carbon Arc Broadline Retail Ad Spend index for September 2026, reported on a year-over-year basis where 100 represents equal spending to the same month in the prior year. Markets resolve to 'Yes' if the reported index value exceeds specific thresholds ranging from 109 to 133. The determining value is the first report published by Carbon Arc, and any subsequent corrections or revisions after market settlement will not alter the outcome. The index measures growth (values above 100) or decline (values below 100) in broadline retail advertising spend compared to the previous year's September. Kalshi explicitly states no affiliation with Carbon Arc, and all trademarks remain property of their respective owners.

Frequently asked questions

On Kalshi, the dashboard for the retail ad spend market tracks the current odds, price history, and 24-hour trading volume. Currently, the volume is $3,126, indicating the level of recent trading activity in this market. The price reflects what traders are willing to pay to own a contract predicting the outcome. You can also see the total volume traded to date, which is $41,910. This provides a comprehensive view of how the market is perceiving the likelihood of different ad spend levels in September.

Currently, prediction market odds reflect a different perspective than many traditional analyst forecasts regarding the retail ad spend market. While some analysts predict a moderate increase in ad spending due to economic conditions, this market suggests a more cautious outlook. It’s important to remember that analyst forecasts are often based on models and surveys, whereas this market represents the collective judgment of individuals putting their capital at risk. Discrepancies can arise from differing interpretations of data or varying levels of confidence in economic indicators.

On Kalshi, this market is priced through a continuous double auction, where traders submit bids and asks for contracts representing different outcomes. The price of a contract reflects the probability of that outcome occurring, as perceived by the market participants. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Traders are constantly adjusting their prices based on new information and their own analysis, creating a dynamic and efficient price discovery process. The market depth, displayed on the dashboard, shows the volume available at different price levels, indicating potential support and resistance.

This market resolves around Oct 13, 2026, with the outcome confirmed once the actual broadline retail ad spend for September is verifiable from credible public reporting. The final settlement will be based on data released by a recognized industry source, ensuring an objective and transparent determination of the result. Traders will then be paid out based on whether their predictions aligned with the reported ad spend figures. It's important to monitor news and economic data releases leading up to the resolution date, as these could influence the market.

Several signals or events could significantly move this market before its resolution. Major economic reports, such as consumer confidence indices or retail sales figures, would likely have a substantial impact. Unexpected changes in interest rates or inflation could also shift expectations regarding consumer spending and, consequently, ad spend. Furthermore, any significant news related to major retailers – earnings reports, strategic announcements, or supply chain disruptions – could influence trading activity in this market. Monitoring these factors will be crucial for understanding potential price movements.