# Home ## This page has been deprecated. V1 documentation is partially maintained [here](https://docs.balancer.fi/v/v1/index) ## Home *Looking for the V2 docs? -->* [*https://docs.balancer.fi/*](https://docs.balancer.fi/) **Balancer** is an automated **portfolio manager**, **liquidity provider**, and **price sensor**. Balancer turns the concept of an index fund on its head: instead of a paying fees to portfolio managers to rebalance your portfolio, you collect fees from traders, who rebalance your portfolio by following arbitrage opportunities. Balancer is based on an [N-dimensional invariant surface](https://balancer.finance/whitepaper/) which is a generalization of the constant product formula described by Vitalik Buterin and proven viable by the popular Uniswap dapp. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://balancer.gitbook.io/balancer/master.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.