TOTAL VOLUME:

$154.7b

24H VOL:

$279,496,801

24H TRANSACTIONS:

2,984,640,614

OPEN INTEREST:

$1,923,931,766

416,910

Markets across

40,107

events

MATCHED EVENTS:

4,571

PLATFORM COVERAGE:

5

Polymarket:

37%

VS.

Kalshi:

63%

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Financials
Online Sportsbook Ad Spend in September
kalshi

How will ad spend perform in September?

Volume:
$66,432

Above 122

 - Kalshi

Above 122 - 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 122

View
100%
Yes 100¢No 0¢
—
N/A
$7,345
N/A
N/A
$4,502
Settled
Yes
kalshi

Above 120

100%
2%
Yes 100¢No 0¢
—
N/A
$4,984
N/A
N/A
$2,834
Settled
Yes
kalshi

Above 116

100%
19%
Yes 100¢No 0¢
—
N/A
$2,547
N/A
N/A
$1,694
Settled
Yes
kalshi

Above 126

100%
34%
Yes 100¢No 0¢
—
N/A
$2,197
N/A
N/A
$1,157
Settled
Yes
kalshi

Above 110

100%
1%
Yes 100¢No 0¢
—
N/A
$2,073
N/A
N/A
$1,926
Settled
Yes
kalshi

Above 118

100%
Yes 100¢No 0¢
—
N/A
$2,067
N/A
N/A
$1,401
Settled
Yes
kalshi

Above 124

100%
21%
Yes 100¢No 0¢
—
N/A
$1,981
N/A
N/A
$1,093
Settled
Yes
kalshi

Above 114

100%
23%
Yes 100¢No 0¢
—
N/A
$213
N/A
N/A
$213
Settled
Yes
kalshi

Above 112

100%
20%
Yes 100¢No 0¢
—
N/A
$200
N/A
N/A
$200
Settled
Yes
kalshi

Above 138

0%
6%
Yes 0¢No 100¢
—
N/A
$7,051
N/A
N/A
$2,798
Settled
No
kalshi

Above 140

0%
7%
Yes 0¢No 100¢
—
N/A
$6,290
N/A
N/A
$2,093
Settled
No
kalshi

Above 132

0%
Yes 0¢No 100¢
—
N/A
$5,640
N/A
N/A
$1,382
Settled
No
kalshi

Above 152

0%
1%
Yes 0¢No 100¢
—
N/A
$5,305
N/A
N/A
$957
Settled
No
kalshi

Above 128

0%
40%
Yes 0¢No 100¢
—
N/A
$4,365
N/A
N/A
$1,561
Settled
No
kalshi

Above 136

0%
11%
Yes 0¢No 100¢
—
N/A
$3,586
N/A
N/A
$2,080
Settled
No
kalshi

Above 134

0%
27%
Yes 0¢No 100¢
—
N/A
$3,251
N/A
N/A
$1,384
Settled
No
kalshi

Above 146

0%
Yes 0¢No 100¢
—
N/A
$3,154
N/A
N/A
$2,498
Settled
No
kalshi

Above 130

0%
16%
Yes 0¢No 100¢
—
N/A
$2,096
N/A
N/A
$1,384
Settled
No
kalshi

Above 150

0%
1%
Yes 0¢No 100¢
—
N/A
$1,355
N/A
N/A
$1,335
Settled
No
kalshi

Above 148

0%
2%
Yes 0¢No 100¢
—
N/A
$275
N/A
N/A
$274
Settled
No
kalshi

Above 142

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

Above 144

0%
Yes 0¢No 100¢
—
N/A
$201
N/A
N/A
$201
Settled
No
Total markets: 22

Description

This set of markets tracks the performance of online sportsbook advertising expenditures for a specific month in 2026, measured against year-over-year growth thresholds. The index compares ad spending levels to those from the same month in the previous year, with values above 100 indicating growth. Each market corresponds to a different growth threshold, allowing participants to speculate on how significant the increase might be.

Kalshi

All markets in this event are resolved based on the Carbon Arc Online Sportsbook Ad Spend index for September 2026, which measures year-over-year changes relative to September 2025. Each market has a specific numerical threshold; the market resolves to 'Yes' if the reported index value exceeds that threshold. The determining value is the first report published by Carbon Arc, and any subsequent corrections or revisions after the market settlement date will not alter the outcome. The index value of 100 represents equal spending compared to the prior year, with values above 100 signifying growth and below 100 indicating decline. 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 sportsbook ad spend market tracks the current price of contracts, reflecting predictions about total ad spend in September. You can view a price history chart to see how expectations have changed over time, and observe the 24-hour trading volume, currently at $3,879. The total volume traded on this market is $66,432. This provides insight into how much traders are betting on different outcomes and the overall interest in this particular event. The dashboard is a central place to monitor activity and understand the collective wisdom of the crowd.

Currently, the prediction market offers a different perspective than many traditional analyst forecasts regarding sportsbook ad spend. While some analysts predict a moderate increase based on recent earnings reports, this market suggests a more cautious outlook. It’s important to remember that prediction markets reflect real-money wagers, incentivizing participants to be as accurate as possible, which can lead to a more nuanced and potentially more accurate forecast than those relying solely on expert opinion or surveys. This difference highlights the value of considering diverse sources of information when evaluating potential outcomes.

On Kalshi, this market is priced using a continuous double auction. Traders buy and sell contracts representing their beliefs about the final ad spend amount. As more traders participate, the price adjusts to reflect the collective expectation. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of a contract represents the probability of that specific outcome occurring, with higher prices indicating a greater likelihood. This dynamic pricing mechanism allows the market to quickly incorporate new information and adjust expectations accordingly. Traders are constantly evaluating and revising their positions, leading to a fluid and responsive market.

This market resolves around Oct 13, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The final ad spend figures for September will be gathered from industry-recognized sources that track advertising expenditure. These figures will then be used to determine the outcome of the market, ensuring a transparent and objective resolution process. The resolution will reflect the total amount spent on advertising by major sportsbooks during the specified period, as reported by these trusted sources.

Several factors could significantly impact this market before it resolves. Major announcements from leading sportsbook companies regarding their marketing strategies, unexpected regulatory changes affecting advertising, or even significant shifts in the sports calendar could all influence trader sentiment. A large, unexpected event in the sports world could also lead to increased or decreased ad spending. Furthermore, broader economic indicators, such as consumer confidence and overall advertising trends, may play a role in shaping expectations and driving price movements in this market.