Abstract: bZx is built on Ethereum and integrated with the 0x protocol. It is the first fully decentralized, peer-to-peer margin funding and trading protocol. bZx is not itself an exchange, but a protocol that can be integrated into the current exchange infrastructure. Exchanges and relays are incentivized by fees denominated in the BZRX protocol token (BZRX) to offer decentralized margin lending and margin trading services. Assets are valued and liquidated via competing oracle providers. By decoupling the valuation and liquidation of assets from the protocol, the oracle marketplace approach allows competition to drive the oracle provider fee to its marginal cost while encouraging experimentation and flexibility.