Mystery Jack

What is Mystery Jack?

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 Mystery Jack

In an interview with the Financial Times over the weekend, Done cautioned that additional tax hikes could result in widespread betting shop closures, harm related sectors such as horse racing and accelerate the decline of the high street.

Betfred currently operates approximately 1,094 retail shops across the UK. Done highlighted the concrete risks of Machine Gaming Duty – taxes on gambling machines – doubling from 20% to 40%, a move reportedly under consideration by Chancellor John Healey ahead of the Autumn Budget.

Betfred’s retail business still heavily depends on fixed-odds betting terminals (FOBTs) and in-shop gambling. Despite the maximum stake limit being cut to £2 in 2019, FOBTs account for roughly half of Betfred’s shop profits. Done emphasised that without these machines, retail betting wass “impossible”.

How to play Mystery Jack

When asked what issue requires the most attention, Kesitilwe highlights underage gambling, especially as mobile penetration in Africa continues to soar.

Particularly concerning to Kesitilwe is the amount of gambling advertising in sports-related content.

“At a break or at half time you see 10 to 20 [gambling] adverts,” he says. “It’s come to a point that oftentimes I even hear my kids singing [gambling adverts]. They’ll just keep asking, ‘But Daddy, what is this? What does this mean?’