Overview
Balancer Finance is a decentralized protocol that blends automated market-making (AMM) with programmable portfolio management. Rather than forcing liquidity providers into static two-token pools, Balancer lets you create pools of multiple tokens with custom weights and fee structures — effectively allowing contributors to run a passive, on-chain portfolio that earns trading fees. The protocol's composability makes it a primitive for vaults, index products, and yield strategies across DeFi.
Official resources: balancer.fi, documentation at docs.balancer.finance, and developer code on github.com/balancer-labs.