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How to play Torii Tumble
Strip away the language of contracts, order books and event trading and Bernard Marantelli has a blunt description of what is happening inside US sports prediction markets. “Kalshi is a sportsbook that’s just not allowed to have an in-house risk team,” says the founder of White Swan Data, one of the specialist firms now making markets on prediction exchanges.
The difference is all about the risk function. A sportsbook employs traders to price bets and manage its exposure. An exchange provides an API through which firms compete to quote prices and supply liquidity.
“Here’s an API. Bernard and 88 other people can market-make all these request-for-quotes (RFQs),” Marantelli says. “Some people might come in and just do esports because they’re esports experts. Others do everything. Some focus on same-game parlays. But it’s a sportsbook.”
How to play Torii Tumble
Atucha praises the regulation and the regulators themselves for making entry into the market easy, as well as allowing them to be competitive against illegal operators. But the market hasn’t been without its challenges.
A 1% selective consumption tax (ISC) on the value of every online bet has been in force since 1 July 2025, after the original policy was scrapped from proposed regulations in July 2021.
Atucha warns that regulations are often perceived as operator-friendly at the start before governments begin looking to squeeze licensed sectors, likening the process to “boiling a frog”. He has observed similar scenarios in other LatAm markets, with tax increases occurring in Brazil, Colombia and Mexico in the last couple of years.
About Torii Tumble
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