Top Index Funds Available in the USA
Short answer
Index funds are investment funds that track a market index, offering broad market exposure with low costs. Two popular types in the USA are the Vanguard Total Stock Market Index Fund and the Fidelity ZERO Total Market Index Fund. They differ in expense ratios, minimum investments, and fund structure, suiting different investor needs depending on budget and investment goals.
What Are Index Funds and How Do They Work?
Index funds are mutual funds or exchange-traded funds (ETFs) designed to replicate the performance of a specific market index, such as the S&P 500 or the total U.S. stock market. Instead of actively picking stocks, these funds hold all or a representative sample of the stocks in the index. This passive management typically results in lower fees and broad diversification, reducing risk compared to investing in individual stocks. When you invest in an index fund, your money is pooled with other investors' money and spread across many companies, matching the index's composition. For a detailed beginner’s guide, see Index Funds for Beginners in the USA.
Which Popular Index Funds Are Available in the USA?
Two widely used index funds are:
- Vanguard Total Stock Market Index Fund (VTSAX or VTI for the ETF version): Tracks the entire U.S. stock market, including small-, mid-, and large-cap stocks. Known for a very low expense ratio and a long track record.
- Fidelity ZERO Total Market Index Fund (FZROX): An index fund with no expense ratio, designed to track the total U.S. stock market. It has no minimum investment and is great for investors just starting out or with limited funds.
Other notable mentions include the Schwab U.S. Broad Market ETF and the iShares Core S&P Total U.S. Stock Market ETF, each with slightly different index targets and fee structures.
How Do These Index Funds Compare?
| Feature | Vanguard Total Stock Market (VTSAX) | Fidelity ZERO Total Market (FZROX) |
|---|---|---|
| Expense Ratio | Around 0.04% | 0.00% |
| Minimum Investment | $3,000 (for the mutual fund) | $0 |
| Fund Type | Mutual Fund / ETF | Mutual Fund |
| Index Tracked | CRSP U.S. Total Market Index | Fidelity U.S. Total Investable Market Index |
| Dividend Reinvestment | Yes | Yes |
| Trading Availability | Mutual fund and ETF versions | Mutual fund only |
| Ideal for | Long-term investors with more capital | Beginners or small investors |
This comparison helps you see how cost, minimum investment, and availability can influence your choice.
Who Should Choose Each Fund?
- Vanguard Total Stock Market Index Fund suits investors who can meet the $3,000 minimum and want a well-established fund with flexibility to trade ETFs or mutual funds. It's ideal for those focused on long-term growth and willing to invest larger sums.
- Fidelity ZERO Total Market Index Fund is great for beginners, small investors, or anyone looking to start investing without minimum barriers or fees. It’s a simple way to gain exposure to the entire U.S. market without initial costs.
Choosing between these depends on your investment amount, access to brokerage platforms, and preference for mutual funds versus ETFs.
What Questions Should You Ask Before Choosing an Index Fund?
Before investing, consider:
- What is the expense ratio? Lower fees mean more of your money stays invested.
- Is there a minimum investment amount? Can you afford to meet it now?
- Does the fund track a broad or specific index? Broader indexes offer more diversification.
- Are you investing for the short or long term? Some funds suit buy-and-hold strategies better.
- Can you easily buy and sell the fund? Consider if you want a mutual fund or an ETF.
- What is the fund’s dividend policy? Reinvested dividends can boost returns over time.
Answering these will guide you to a fund that aligns with your financial goals.
Can You Switch Between Index Funds Later?
Yes, many investors switch funds as their needs change. For example, you might start with Fidelity ZERO Total Market due to no minimums and later move to Vanguard for its ETF options and long-term benefits. Keep in mind:
- Check if your account charges fees for trades or fund switches.
- Consider potential tax implications of selling shares.
- Confirm if your brokerage allows easy transfers between funds.
- Evaluate if the new fund better suits your risk tolerance or investment horizon.
Consult your brokerage and tax advisor before making changes to ensure it fits your overall financial plan.
How to Start Investing in These Index Funds?
- Open a brokerage account that offers these funds (Vanguard, Fidelity, or others).
- Fund your account with your initial investment amount.
- Decide whether to buy mutual fund shares or ETFs depending on availability.
- Place an order to buy the shares, specifying the amount or number of shares.
- Set up dividend reinvestment if you want to automatically reinvest payouts.
- Monitor your investments periodically but avoid frequent trading.
Starting with small amounts and gradually increasing your investment can help build wealth over time.
What Are the Risks Involved in Index Fund Investing?
While index funds are generally less risky than individual stocks, they still carry market risk. If the overall market declines, your investment value will likely fall as well. They do not protect against losses but tend to be less volatile due to diversification. Also, some funds might focus on specific sectors or sizes of companies, which can affect risk. Consider your risk tolerance and investment timeline before choosing a fund.
For more on picking the right index fund and managing risk, see Which Index Fund Is Best?.
Frequently asked questions
What is the difference between an index fund and an ETF?
Both track indexes, but index funds are often mutual funds bought at the end of the trading day, while ETFs trade like stocks throughout the day. ETFs can offer more trading flexibility, but fees and minimums vary by fund.
Can I invest in index funds with a small amount of money?
Yes, some funds like Fidelity ZERO Total Market have no minimum investment, allowing you to start with any amount. Others may require a few thousand dollars to begin.
Are index funds safer than individual stocks?
They tend to be less risky because they diversify across many companies, reducing the impact of any single stock's performance. However, they still carry market risk.
How often should I check or rebalance my index fund investments?
It’s typically best to review your portfolio at least once a year and rebalance if your asset allocation drifts from your target. Avoid frequent checking to reduce emotional decisions.
Do index funds pay dividends?
Yes, many index funds pay dividends based on the stocks they hold. These dividends can usually be reinvested to buy more shares, helping your investment grow over time.
Are there tax advantages to investing in index funds?
Index funds generally have lower turnover, meaning fewer taxable events compared to actively managed funds. Tax efficiency can vary, so consider your personal tax situation or consult a tax professional.