Polymarket has filed with the Commodity Futures Trading Commission (CFTC) to list combinatorial outcome contracts, or parlays, in the U.S. These contracts require all underlying outcomes to be satisfied for a payout, resolving to $1.00 if successful, or $0.00 if any leg fails. The filing indicates Polymarket's intent to list these products by May 21, 2026, without needing explicit CFTC approval. Meanwhile, the Securities and Exchange Commission (SEC) is seeking public input on the potential for exchange-traded funds (ETFs) based on prediction markets. SEC Chairman Paul Atkins highlighted the growth of ETFs and the need for careful consideration of novel products like event contract ETFs. This comes amid increased scrutiny of prediction markets by Congress and state regulators, who argue these markets may infringe on state gambling regulations. The U.S. Supreme Court may eventually address the regulatory challenges posed by prediction markets.