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Singles can be profitable, but parlay pricing requires the market maker to calculate the correlations between multiple outcomes and respond dynamically to individual requests. It is a skill set built over years in the sharper regions of the existing sports betting ecosystem.
Marantelli identifies White Swan and Susquehanna as two firms operating at industrial scale in parlays, with Jump Trading, Mojo and DL Trading among the possible leading group. Below them are numerous smaller syndicates, some managing between $5 million and $10 million, alongside sports-specific specialists.
Enda Kendrick, chief executive of service provider Veltium, similarly says the largest UK and European sharp-betting groups have moved rapidly into US prediction markets. He believes there are also more than 100 smaller operations, ranging from individual traders to teams of around 10, interested in entering the regulated US market.
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The sanctions, effective from 28 August 2026 , bar Santos from any direct or indirect trading access on Kalshi.
Earlier this year, fellow prediction market platform Polymarket also ended its paid relationship with Santos amid a Department of Justice investigation over whether he had placed a wager on his appearance at the same State of Union address.
A federal judge sentenced Santos to 87 months in prison last April on felony wire fraud and check fraud charges. After Santos served several months in 2025, US President Donald Trump granted the former congressman clemency, resulting in his immediate release.
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As the U.S. warms to the idea of online sports betting, the NCAA has taken steps to protect its athletes. Deputy General Counsel of the NCAA, Naima Stevenson Starks sat down with Calvinayre.com’s Becky Liggero Fontana to explain her organisation’s stance towards betting involving student athletes and maintaining the integrity of those competitions.
Stevenson Starks shared those concerns that the NCAA has towards online sports betting in the U.S.:
“The two [concerns] are the integrity of athletic competition, and how that could potentially be impacted by a proliferation of legalized sports wagering. And then the second is really the health and well-being of student athletes.“