Index Fund
A type of mutual fund or ETF that tracks a market index, providing broad market exposure with low costs.
What You Need to Know
An index fund is a type of mutual fund or exchange-traded fund (ETF) that tracks a market index, such as the S&P 500. It provides broad market exposure with low costs and minimal management.
How It Works:
- Tracks a specific market index (S&P 500, Dow Jones, etc.)
- Holds all or most securities in the index
- Automatically rebalances to match index changes
- Passively managed (no active stock picking)
Benefits:
- Low Costs: Expense ratios typically 0.1-0.5%
- Diversification: Instant diversification across many stocks
- Transparency: Holdings are publicly disclosed
- Tax Efficiency: Lower turnover than active funds
- Performance: Often outperforms active funds over long term
Types of Index Funds:
- Stock Index Funds: Track stock market indexes
- Bond Index Funds: Track bond market indexes
- International Index Funds: Track foreign market indexes
- Sector Index Funds: Track specific industry sectors
Popular Indexes:
- S&P 500: 500 largest US companies
- Dow Jones: 30 large US companies
- Russell 2000: 2000 small-cap companies
- MSCI World: Global developed markets
Best For:
- Long-term investors
- Cost-conscious investors
- Those seeking market returns
- Beginners to investing
- Retirement accounts
Drawbacks:
- No outperformance potential
- Market volatility
- No downside protection
- Limited customization
Famous Quote: "Don't look for the needle in the haystack. Just buy the haystack."
- John Bogle, founder of Vanguard
Sources & References
This information is sourced from authoritative government and academic institutions:
- investor.gov
https://www.investor.gov/introduction-investing/investing-basics/investment-products/mutual-funds-and-exchange-traded-1
Related Calculators & Tools
Put your knowledge into action with these interactive tools:
Related Terms in Investment Analysis
Appreciation
The increase in an asset's value over time, whether it's real estate, stocks, or other investments.
Asset Class
A group of investments with similar behavior, risk, and regulatory profiles (e.g., stocks, bonds, cash).
Bond
A fixed-income investment where you loan money to a government or corporation in exchange for regular interest payments.
Bond Yield
The return an investor earns on a bond, expressed as a percentage, which can be calculated as current yield (annual interest ÷ current price) or yield to maturity (total return if held until maturity).
Capital Gains Tax
Tax on profits from selling investments like stocks, bonds, or real estate.
Capital Loss
A loss realized when you sell an investment for less than you paid for it, which can offset capital gains for tax purposes.