This week in the gambling sector, several significant stories have emerged, particularly surrounding prediction markets, insider trading, and the NBA Finals approaching next Wednesday.
Prediction markets remain a hot topic, with discussions on parlays and insider trading making waves. The NBA is also in focus as it addresses the issue of tanking, which has implications for sports betting. Meanwhile, a unique promotion by a gambling operator is drawing attention, involving one of the league's top players.
Moreover, a prominent figure in the sports and gambling industry is nearing the completion of a long-anticipated acquisition that could have widespread effects, while the French Open has delivered unexpected results.
Here’s a recap of the week’s highlights:
Bust: Kalshi Faces Reality Over Parlays
Kalshi and its supporters argue that sports betting is becoming a smaller part of overall trading, but they are neglecting to include parlays in their analysis. Industry analysts are not letting this slide. According to Dustin Gouker, parlays, which are predominantly sports-related, account for approximately 25% of the exchange's trading volume. Despite Kalshi's claims, Dune has placed behind a paywall data showing customer losses on prediction market combos. Retail users reportedly lose 45% more on these combos compared to sportsbook parlays, with returns on investment showing -18% for combos versus -12% for parlays. The situation raises questions about the economic value of parlays.
Bingo: Insider Trader from Polymarket Charged
Michele Spagnuolo, a Google software engineer, has been charged with insider trading after allegedly making over $1.2 million from bets on the most searched terms of 2025. While Polymarket has acknowledged the suspicious activity, they must also take responsibility for creating markets vulnerable to such practices. Spagnuolo is the second trader from Polymarket to face charges in recent months, following U.S. soldier Gannon Ken Van Dyke, who was charged in April for profiting from inside information regarding Venezuelan President Nicolás Maduro.
Bust: Trump Changes Stance on Prediction Markets
President Trump expressed discomfort with the insider trading news related to Van Dyke, initially stating his disfavor towards prediction markets. However, he recently reversed his position, endorsing prediction markets on his Truth Social platform and asserting that the CFTC should maintain exclusive authority over the industry. This comes as the White House reviews the CFTC's proposed regulations.
Bingo: Fertitta Wins Caesars Entertainment Acquisition
In a significant move, Tilman Fertitta has successfully acquired Caesars Entertainment in a deal valued at $17.6 billion, which includes $11.9 billion in debt. Fertitta triumphed over competitors like Carl Icahn and plans to take Caesars private.