About this app
About Vortex Halloween
The Meadows Addition—”Las Vegas” is Spanish for “the meadows”—was created in the late 1940s as a grid of 16 streets named after other cities, including New York, Chicago, Cleveland, St. Louis, and Philadelphia. Before the Sahara opened in 1952, Sahara Avenue was wholly contained in this community, where it was known as San Francisco Street.
When its first apartment buildings opened in 1953, the Meadows Addition became a popular home for Strip employees, including showgirls, who found the low rents and short commutes ideal.
But the expansion of Las Vegas beyond the Strip eventually gave its hospitality workers and performers their pick of nearby accommodations, including beautiful new houses that were also reasonably priced and more suited to raising families.
How to play Vortex Halloween
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.
What is Vortex Halloween?
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.
As Macquarie analyst Chad Beynon points out, prediction markets generated $4.3 billion in taker volume during the first week of September without any help from the NFL, building on momentum from the 2026 World Cup. However, the NFL’s impact was immediate, with taker volume hitting a daily record during Week 1 of the campaign.
With all that in mind, it’s not surprising that Macquarie expects sports event contracts will drive approximately 80% of taker volume this year, but Beynon sees other categories growing over the long term.