The Cage

What is The Cage?

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.”

About The Cage

By 2026, the technology had already been tested across several seasons of top-level competitions including the Premier League and Champions League. AI now trades more than 70% of bets across Kambi’s network, including all football and tennis.

The 2026 World Cup was therefore the culmination of five years of development that had embedded AI throughout Kambi’s trading operations.

“In simple terms, what we have undertaken is a shift from machine-assisted human trading to human-assisted machine trading,” Lamb explains.

About The Cage

A potential MGD rise was first reported in the The Financial Times, as Chancellor John Healey is allegedly looking to raise the tax, on the recommendation of the Social Market Foundation, which proposed the increase in a recent report.

Prime Minister Andy Burnham had already announced the government’s intention to scrap “aim to permit” for betting shops as well as insisting that AGCs will now need planning permission to function.

In her letter David warned another tax increase, on top of April’s RGD increase to 40% of GGR, could increase its operational expenses for retail by £100 million annually.