Kalshi Addresses Insider Trading Concerns on Prediction Market

Kalshi, a federally regulated prediction market, is implementing surveillance systems and referring suspected insider trading cases to federal authorities. This initiative follows instances involving figures such as former Congressman George Santos and a former White House teleprompter operator.

What Happened

Kalshi, a significant platform in the prediction market industry, has developed and deployed surveillance systems to detect suspicious trading activities. The company has reportedly begun referring instances of suspected misconduct to federal authorities (Fortune). Laura Frank, a Kalshi spokesperson, stated that the company is federally regulated, which mandates a ban on market manipulation and insider trading, sets limits on listed market types, and requires daily public reporting of all trades to the CFTC (Fortune).

These systems are comparable to those utilized in the stock market, having been developed over several years (Fortune). Kalshi’s terms of service and exchange rules explicitly prohibit market manipulation and insider trading, and users are required to complete identity verification before engaging in trading activities. The platform continuously monitors trading activity for potential rule violations (Fortune).

Key Details

• Kalshi’s systems reportedly flagged trades by former Congressman George Santos related to State of the Union address markets, leading to an investigation and referral to the Commodity Futures Trading Commission (CFTC), according to Kalshi (Fortune).
• Federal authorities have investigated the trading activities of Gabriel Perez, a former White House teleprompter operator, for potentially using advance knowledge of presidential remarks to trade on Kalshi markets (Fortune).
• Kalshi also reportedly identified insider trading by an employee of MrBeast and a candidate for California governor earlier this year (Fortune).
• According to a study by Professor Joshua Mitts of Columbia Law and Professor Moran Ofir of the University of Haifa, bets on prediction markets achieved a nearly 70% win rate, which is “well in excess of chance,” with an estimated $143 million in profits for traders (Fortune).
• Donald Trump Jr. is a paid strategic advisor for Kalshi and has invested in rival prediction market Polymarket through his venture capital firm, 1789 Capital. He also joined Polymarket’s advisory board last year (Fortune).
• President Donald Trump’s media company, Trump Media & Technology Group, is developing TruthPredict, a prediction market, and has launched Truth API, which provides rapid, machine-readable access to Truth Social posts for Wall Street traders (Fortune).

Why It Matters

The increasing interconnectedness of prediction markets with government activities introduces regulatory challenges, particularly concerning the potential for insider trading (Fortune). As political decisions and government information become tradable assets, platforms like Kalshi are under pressure to demonstrate robust enforcement of their anti-insider trading policies. The involvement of political figures and their associates in both the operational and investment aspects of prediction markets highlights potential conflicts of interest and raises questions about market integrity, especially when public officials’ actions can directly influence market outcomes (Fortune).

The development of new platforms, such as Trump Media & Technology Group’s TruthPredict and Truth API, further complicates this landscape. These initiatives could create a financial ecosystem where market-moving information from political figures is accessible to a select group of traders more rapidly, potentially creating an unfair advantage (Fortune).

What’s Next

Kalshi is reportedly pursuing its own enforcement action against George Santos for violating exchange rules, stating that if monetary penalties are recovered, the company plans to reimburse affected traders (Fortune).

Originally reported by Fortune·Published 9 Aug 2026, 08:30