Shamrock Miner

How to play Shamrock Miner

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.”

What is Shamrock Miner?

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What is Shamrock Miner?

In January, Polymarket and Dow Jones announced an agreement that paved the way for event contract data to appear on various Dow Jones sites, including The Wall Street Journal. Dow Jones also owns Barron’s, Investor’s Business Daily and MarketWatch, among other media properties.

Polymarket also has marketing deals with Major League Baseball (MLB), Major League Soccer (MLS), the NHL and UFC.

While the Polymarket/Yahoo Finance situation is one of the earliest examples of a severed relationship between a prediction market operator and a media entity, that doesn’t mean those “divorces” will permeate the two industries.