Rio Stars

What is Rio Stars?

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.

What is Rio Stars?

The dual approach seeks not only to limit access to gambling content on smartphones but also to provide meaningful alternatives that reduce overall reliance on digital devices.

The KGCC, which operates under the prime minister’s office and oversees gambling supervision and the monitoring of illegal gambling activity, will collaborate with the Gyeonggi education office. There will be policy coordination, student protection and the exchange of educational resources and prevention experts. 

The partnership also plans to analyse operational data, develop pilot programmes and construct a model for national deployment.

What is Rio Stars?

Eilers & Krejcik Gaming (EKG) estimates that bettors will plunk down $40.5 billion on the NFL this season through regulated channels. Traditional sportsbooks are projected to capture $31.7 billion of that total, compared to a handle analog of $8.4 billion for prediction markets—a 79% to 21% split in favor of legacy operators.

Handle analog is a metric used as a cleaner comparison between sportsbooks and prediction markets because the latter’s volume doesn’t compare evenly with sportsbook handle.

Based on its projections, EKG sees the overall sports wagering industry growing 8% year-over-year, outpacing the current baseline growth rate of 5% (a figure that strips out temporary boosts from the 2026 World Cup).