Big Bass Halloween

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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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“Recent launches, including customizable same-game parlays (SGPs), further support our view that Prediction Markets (PM) are increasingly converging with traditional sportsbooks,” observes Macquarie analyst Chad Beynon. “As a result, we now estimate total US PM taker volume to reach $190 billion in 2026E (vs $169 billion prior).”

If the research firm’s $190 billion taker volume estimate proves accurate, it’d represent a more than eightfold increase from the $22 billion taker turnover seen last year.

Potentially boding well for the Macquarie forecast are at least two factors. First, there are signs of turnover increases across a variety of yes/no exchanges. Second, volume surged to start September with those spikes arriving even before the NFL season kicked off.

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Furthermore, the text maintains obligations for monitoring and institutional cooperation, with the provision of aggregated and anonymised data to the competent authorities. It also provides for actions by the executive branch aimed at monitoring the impacts of betting, training health professionals, updating care protocols and periodically disseminating information on the effects of the activity. 

Application providers, digital platforms, hosting services and media intermediaries must remove irregular advertisements and campaigns after notification from the competent authority. The rapporteur’s version requires that the notification clearly and specifically identifies any content deemed irregular and ensures the right to a fair hearing and full defence. Journalistic, academic, parliamentary, artistic and opinion content are expressly protected. 

Operators and companies linked to them are also prohibited from acquiring, licensing, or exploiting rights to sporting events held in the country. In the area of ​​administrative penalties, the rapporteur’s text incorporates the new infractions into the existing sanctions system in Law 14.790 of 2023, which provides for fines of up to BRL2 billion ($392.8 million).