$US

USDD (Decentralized USD) is a type of decentralized, over-collateralized stablecoin designed to maintain a 1:1 peg with the US dollar and can be used across multiple chains and in the DeFi ecosystem. Mechanically, USDD is not fully backed by fiat reserves but relies on various crypto assets as over-collateralization, combined with market adjustment mechanisms to maintain price stability. This design theoretically enhances capital efficiency.