US House calls for tighter prediction market rules following insider trading probe

Congressional investigators reviewed nearly 1,700 pages of records from prediction market platforms, including Kalshi, Polymarket and Hyperliquid. Staff for the US House Committee on Oversight and Government Reform have urged Congress to consider restricting government officials from trading prediction market contracts related to government actions and political outcomes, following an investigation into potential insider trading. In a November 13 memorandum , the committee said it had received nearly 1,700 pages of documents and communications and conducted five bipartisan briefings with platform representatives, legal counsel and employees responsible for detecting suspicious trading activity.