Frax is open-source and permissionless. It can be implemented on Ethereum or other chains. Frax is a protocol that provides a highly scalable, distributed, and algorithmic money to replace fixed-supply digital assets such as Bitcoin. Frax is a paradigm shift in stablecoin design. Many stablecoin protocols only embrace one type of design (entirely supported) or the other (entirely algorithmic without backing). Collateralized stablecoins either have custodial risk or require on-chain overcollateralization. Frax is the only stablecoin that has parts of its supply backed with collateral and parts of its supply algorithmic. FRAX is therefore the first stablecoin with a floating/unbacked part of its supply.