This technical report discusses the implications of the recently enacted U.S. GENIUS Act on stablecoins, which are digital assets designed to maintain a stable value against national currencies. The report outlines how stablecoins have evolved from tools for cryptocurrency trading to becoming a regulated part of the U.S. financial system. It details the requirements set by the GENIUS Act for stablecoin issuers, including the necessity for full backing by safe, liquid assets and regular audits to enhance trust and prevent failures. The report also highlights the potential benefits of stablecoins in payments, particularly in cross-border transactions, where they could reduce costs and increase efficiency. Despite their growth, stablecoins currently represent a small fraction of the U.S. money supply. The report emphasizes the importance of upcoming regulatory frameworks to ensure the stability and reliability of stablecoins as they become more integrated into the financial ecosystem, while also addressing the risks associated with their widespread adoption.