Passive investing is an investment strategy that involves building a portfolio of securities that mirror the composition of a market index or benchmark, rather than actively selecting individual securities in an attempt to outperform the market.

This approach is sometimes referred to as index investing or index tracking and is designed to provide investors with exposure to the overall market with relatively low costs and low levels of turnover. The goal is to match the returns of the market, rather than trying to beat it through stock picking or market timing.