Polymarket, a prediction market provider, has filed to list parlays in sports event contracts in the U.S., according to a self-certification filing with the Commodity Futures Trading Commission (CFTC). The filing outlines 'combinatorial outcome contracts' that resolve if all parts of an underlying contract are satisfied. Polymarket plans to list these contracts no earlier than May 21, 2026. Meanwhile, the Securities and Exchange Commission (SEC) is seeking public input on the potential for exchange-traded funds (ETFs) related to prediction markets, according to CoinDesk. SEC Chairman Paul Atkins highlighted the need for transparency and public input as the agency considers the implications of novel ETFs. This development comes amid increased scrutiny of prediction markets by Congress and state regulators, particularly concerning their expansion into sports leagues.