U.S. regulators are reportedly set to propose a comprehensive set of regulations for prediction markets such as Kalshi and Polymarket.

The move is aimed at preventing possible manipulation while still allowing most sports-related bets.

The Commodity Futures Trading Commission (CFTC) is preparing to propose new regulations that are designed to empower the commission to reject prediction wagers that are not in the public interest or are highly susceptible to manipulation, the Wall Street Journal reported on Wednesday.

The rules could affect certain sports-related trading markets, including wagers on player injuries and first-pitch outcomes.

Markets tied to war, terrorism, or assassinations would likely be barred, as regulators do not consider them to be in the public interest.