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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.
The pure-play prediction market-operators, Polymarket and Kalshi, emerged from Week 1 as the clear winners. On one hand, Kalshi’s market share lead narrowed over its competitors, falling to 82% for the week ended 13 September, down from 86% a week earlier.
About Dog Town: Puppy Pet Shop Games
In response, DeNault noted that prediction markets regulated on the federal level by the CFTC offer a “safer alternative” than many offshore operators that lack the requisite consumer protections.
“You can go the combative route and ban something that’s federally regulated,” he said. “But what you’ll end up with is a bunch of customers in Texas just going offshore.”
The committee also heard from Brianne Doura-Schawohl, a nationally recognised problem gambling expert. One study cited by Doura-Schawohl found that 52% of Gen Z respondents include sports betting and prediction markets as part of their long-term financial plan.
About Dog Town: Puppy Pet Shop Games
For now, the growth provides room for multiple market makers. Marantelli expects margins to “stay good during the growth period” before contracting as competition intensifies. The more complex RFQ and parlay markets may offer the best protection against that compression.
The result is an emerging ecosystem that looks less like millions of customers casually trading predictions with one another and more like an outsourced sportsbook trading room. Exchanges own the platform and recruit the customers; specialist firms price the risk and provide the money needed to make those markets function.
As Marantelli says: “Let’s call a spade a spade.”
