U.S. Lawmakers Intensify Scrutiny of Prediction Markets Amid Insider Trading Concerns

Congressional leaders are intensifying oversight of prediction markets such as Polymarket and Kalshi, focusing on potential insider trading and regulatory challenges. The Commodity Futures Trading Commission (CFTC) asserts its jurisdiction over these platforms, emphasizing the need for federal regulation. CFTC Chairman Michael Selig stated that event-based contracts fall under the agency's mandate as derivatives products, rather than gambling, and should therefore be overseen at the federal level.

In response to legislative pressures, both platforms have implemented measures to curb insider trading. Polymarket updated its rules to prohibit trading on information that violates duties of trust or confidence, even if obtained secondhand. Kalshi introduced technological safeguards to prevent politicians from trading on their own campaigns and athletes from trading on contracts related to their sports leagues.

The rapid growth of prediction markets has led to legal disputes over jurisdiction. A federal judge in Arizona temporarily blocked the state from enforcing its gambling laws against Kalshi, ruling that the CFTC has jurisdiction under the Commodity Exchange Act, which categorizes Kalshi’s event contracts as "swaps," preempting state laws.

As the debate continues, the CFTC is expected to create more rules around prediction markets, particularly defining insider trading. However, prediction markets have become a much larger retail phenomenon than traditional derivatives, raising questions about the extent of regulation needed.