Alphabet Inc Class CArticle mentions a Google employee indicted for insider trading using internal info on prediction markets, highlighting regulatory and ethical risks for Alphabet.

Prediction markets have grown rapidly amid regulatory ambiguity, and the strain is showing. Beyond the debate over whether they are financial products or gambling, there are mounting issues such as insider trading using confidential information and betting on ethically problematic topics like war. According to specialized media, the monthly trading volume of Kalshi and Polymarket surged from about $2 billion (approximately 320 billion yen) in June 2025 to about $47 billion in June of this year, when the soccer World Cup was held, and about $53 billion in July—a more than twentyfold increase. Trading now spans politics, sports, central bank policies, corporate earnings, weather, and other diverse areas. However, the ability to bet on niche events not found in traditional gambling leaves ample room for insider trading. This year, it came to light that a Google employee used internal company information to make substantial profits on trades related to the most searched words of 2025, and U.S. authorities indicted the individual on fraud and other charges. More serious are the cases in which U.S. government officials are suspected of insider trading in connection with military action against Venezuela and attacks on Iran. Even within the ruling Republican Party, there are calls for stricter regulation, with Representative Blake Moore stating, "Highly classified military attacks must not become opportunities for speculation."
Alphabet Inc Class CArticle mentions a Google employee indicted for insider trading using internal info on prediction markets, highlighting regulatory and ethical risks for Alphabet.