美國眾議院監督委員會主席詹姆士·康默（James Comer）宣布，已對Kalshi及Polymarket展開內線交易調查，要求兩家公司於6月5日前提交身分驗證、地域限製、異常交易監控等相關文件。委員會表示，預測市場的匿名性與加密基礎設施，可能遭內部人士利用進行交易。

James Comer, Chairman of the U.S. House Oversight Committee, announced an insider trading investigation into Kalshi and Polymarket. The two firms are required to submit documents related to identity verification, geographic restrictions and abnormal transaction monitoring by June 5.

The committee stated that the anonymity of prediction markets and crypto infrastructure could be exploited by insiders for trading activities.