BUD is a decentralized stablecoin designed to maintain a soft peg to the US Dollar. It is the native stablecoin of the BOOKUSD protocol, a borrowing platform deployed on the BNB Chain. Users can mint BUD by depositing BOOK tokens as collateral, enabling access to on-chain liquidity without needing to sell their assets.

The BOOKUSD protocol is a fork of Liquity V1, originally built on Ethereum, but modified to use BOOK—an asset native to the BNB Chain—instead of ETH as collateral. The protocol offers interest-free borrowing and operates with a liquidation mechanism based on collateral ratios and stability pools to maintain system health.