What it is
An index fund is an investment fund designed to passively track the performance of a particular market index, such as the S&P 500 or a specific cryptocurrency index. Rather than actively selecting individual securities, the fund holds a portfolio that mirrors the components and weighting of its benchmark index. This strategy aims to achieve returns similar to the index, typically with lower management fees and reduced turnover compared to actively managed funds.
Index funds are popular for their diversification benefits and cost-effectiveness. In the context of crypto, an index fund could track a basket of top cryptocurrencies by market capitalization, offering broad exposure to the digital asset market. Exchange-traded funds (ETFs) are a common structure for index funds, providing intraday trading liquidity. While aiming to match an index, slight deviations, known as tracking error, can occur due to fees, rebalancing, or sampling methods.
Why it matters
Index funds offer diversified, low-cost exposure to a specific market segment or asset class, including cryptocurrencies, without active management risk.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice