# Fixed-Expiry OSDA

### Fixed-Expiry OSDA Contract

The Fixed-Expiry OSDA is an implementation of the [Base OSDA](https://dev.bondprotocol.finance/smart-contracts/bond-system/auctioneer/oracle-sequential-dutch-auctioneer-osda) contract specific to creating fixed-expiry bond markets and deploying an ERC20 bond position token for the market on creation.