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%
Closed: Oct 5, 11:59 PM EST
Kalshi
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.
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.
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.