The GENIUS Act - now enacted in the U.S. - establishes comprehensive rules for payment stablecoins, requiring robust backing, audits and issuer transparency. The law narrows legal uncertainty for domestic stablecoin issuers while setting conditions for foreign firms seeking U.S. market access. Observers say the Act boosts consumer protection and could spur institutional adoption in payments , but it also raises questions on cross-border coordination as regulators in the EU, Hong Kong and other markets design parallel rules.