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Before Patrick Mahomes laced up his cleats for his 2026-2027 NFL regular-season debut, US prediction markets had already cleared a historic benchmark for the opening week of the season.
Two operators alone – Kalshi and Polymarket – topped the combined $1 billion mark in NFL trading activity over the first six days of Week 1, according to numerous measures this week. During the period, Kalshi recorded NFL volume of $983.4 million, according to DeFi Rate, earning the pole position by a large margin. Mahomes and the Kansas City Chiefs thrashed the Denver Broncos 31-10 on Monday Night Football, capping the largest week for prediction markets ever.
Even before the primetime matchup in Kansas City, it became abundantly clear that the industry would shatter previous marks for weekly activity. The AFC West showdown bolstered the already robust totals. Overall, volume for the week hit a record $15.9 billion, according to Bank of America, up 16% from a week earlier.
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One of the proposals could be voted on next week by the city council and would directly affect the city’s clubs.
The meeting brought together 40 professionals from the clubs’ legal, communications and marketing departments, as well as executives from companies in the betting sector. Club officials are concerned about the financial impact of the measures, which could impact sponsorship contracts signed with betting companies.
One of the main concerns is Bill 560/2025, which is currently making its way through the council. The proposal prohibits advertising by betting companies at events in the city of São Paulo. This applies to events organised by public or private entities, whether for-profit or non-profit.
What is American Sevens?
“Casinos, junkets, cryptocurrencies and underground banking are the most critical parts of the money laundering infrastructure that fuels international organised crime,” he said at the time. “The global gambling market will reach $205 billion in 2030.”
The government blocked 548,420 illegal betting and gambling websites between 2006 and 2025, including 84,000 in 2025 alone.
These comments echo a similar sentiment emphasised at the country’s Directorate of Communications panel event on illegal betting and addiction on 10 September. Deputy Minister of Interior Ali Çelik suggested that curbing addiction would lead to a decrease in illegal betting activity.
