What Are Index Funds? A Simple Guide to Getting Started in 2026

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Index funds have become one of the most popular investment vehicles for both beginners and experienced investors. This guide will explain what index funds are, their benefits, and how to start investing in them.

What is an Index Fund?

An index fund is a type of mutual fund or exchange-traded fund (ETF) that tracks a specific market index, such as the S&P 500. Instead of having a manager actively picking stocks, these funds automatically invest in all or a representative sample of the securities in the target index.

Benefits of Index Funds

  • Lower fees compared to actively managed funds
  • Broad market diversification
  • Historically consistent returns
  • Simple investment strategy
  • Lower minimum investment requirements

Popular Index Funds to Consider

U.S. Large-Cap Funds

Total Market Funds

International Funds

Bond Index Funds

How to Start Investing in Index Funds

Getting started with index funds is straightforward. First, you'll need to open a brokerage account with platforms like Fidelity, Vanguard, or Charles Schwab. Before diving in, consider reading our guide to stock market basics to build a strong foundation.

Common Investment Strategies

Many investors combine US and international index funds for diversification. You might want to check out our guide to American dividend stocks to understand how index funds can complement individual stock picks. For tracking your investments, these free budget spreadsheet templates can help manage your portfolio.

Final Words

Index funds offer a simple, low-cost way to build long-term wealth through diversified market exposure. By understanding the basics and starting with reputable providers, you can create a solid foundation for your investment journey.