Excalibur

How to play Excalibur

James Monk, founder of sports data and streaming provider Catalist Sports, has witnessed that dependence directly. Catalist supplies ITF tennis data to Kalshi and Polymarket and has an exclusive US sports-streaming agreement with Kalshi.

The company must also provide data to the firms making markets on those events.

“If we just sold the data to Kalshi in order to list the markets but no one was coming in and placing liquidity, there’s no point in them listing the markets,” Monk said. “We also need to supply the data to the market makers to inform their models.”

How to play Excalibur

Americans wagered nearly $167 billion on sports in 2025 through regulated sportsbooks, an 11% increase year-over-year, according to data from the American Gaming Association (AGA).

The blurring line between financial investing and gambling has been accelerated by the rise of prediction markets—exchanges offering event contracts that are federally regulated as financial derivatives. U.S. News found that over 40% of active sports bettors now also participate in sports prediction markets.

Financial advisors continue to urge consumers to view sports wagering strictly as entertainment and to only risk funds they can afford to lose.

What is Excalibur?

Raja was reportedly permitted to access as much as £600,000 ($800,000) a day from his bank account to finance his casino play, according to The Telegraph.

“He would play and play, drink and drink, and if he didn’t lose all his money at the Palm Beach, he would then get in a car and go around the corner to the Colony Club,” the source told the newspaper.

The Telegraph noted that it does not claim any funds allegedly misappropriated from MFS were used to finance Raja’s gambling.