Building a Simple, Diversified Portfolio at Fidelity: A 3-Fund Approach.

Aug 26, 2025 | Fidelity IRA | 2 comments

Building a Simple, Diversified Portfolio at Fidelity: A 3-Fund Approach.

Building a Rock-Solid Foundation: How to Create a 3-Fund Portfolio at Fidelity

In the often-overwhelming world of investing, simplicity can be a powerful tool. The 3-fund portfolio, a strategy championed by financial gurus like Jack Bogle, offers a straightforward and effective way to diversify your investments without the complexity of managing numerous individual stocks or bonds. This approach aims to capture broad market returns at a low cost, making it an ideal choice for beginner investors and those seeking a hands-off approach.

This article will guide you through building a 3-fund portfolio at Fidelity, a leading brokerage platform known for its competitive fees and extensive fund options.

What is a 3-Fund Portfolio?

A 3-fund portfolio is precisely what it sounds like: a portfolio composed of just three index funds designed to represent the entire stock and bond market. These funds typically cover:

  • Total US Stock Market: Captures the performance of a broad range of U.S. companies, from large-cap to small-cap.
  • Total International Stock Market: Provides exposure to companies located outside the United States.
  • Total US Bond Market: Offers exposure to a wide range of U.S. bonds, providing stability and income.

Why Choose a 3-Fund Portfolio?

  • Diversification: Spreads your investment across thousands of stocks and bonds, reducing the risk associated with investing in individual securities.
  • Low Cost: Index funds generally have very low expense ratios, meaning more of your investment returns stay in your pocket.
  • Simplicity: Easy to understand and manage, requiring minimal active trading.
  • Long-Term Growth: Designed to capture the long-term growth potential of the market.

Steps to Building Your 3-Fund Portfolio at Fidelity:

1. Open a Fidelity Account:

  • If you don’t already have one, visit Fidelity’s website (www.fidelity.com) and open an account. You’ll need to provide your personal information, including your Social Security number, and choose the type of account you want (e.g., Roth IRA, Traditional IRA, taxable brokerage account).
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2. Determine Your Asset Allocation:

This is the most crucial step. Your asset allocation – the percentage of your portfolio allocated to each fund – will depend on your:

  • Risk Tolerance: How comfortable are you with market fluctuations? A younger investor with a longer time horizon might be comfortable with a higher allocation to stocks.
  • Investment Goals: What are you saving for? Retirement, a down payment on a house, or another goal?
  • Time Horizon: How long do you have until you need to access your funds?

Here are some sample asset allocations:

  • Aggressive (Long-Term Growth): 80% Stocks (60% US, 20% International), 20% Bonds
  • Moderate (Balanced Growth and Income): 60% Stocks (40% US, 20% International), 40% Bonds
  • Conservative (Income and Preservation of Capital): 40% Stocks (30% US, 10% International), 60% Bonds

3. Choose Your Fidelity Funds:

Fidelity offers excellent low-cost index funds that are perfect for building a 3-fund portfolio. Here are some recommended options:

  • Total US Stock Market:
    • Fidelity ZERO Total Market Index Fund (FZROX): Zero expense ratio! A great option if available in your account type.
    • Fidelity Total Market Index Fund (FSKAX): Very low expense ratio, generally available across account types.
  • Total International Stock Market:
    • Fidelity ZERO International Index Fund (FZILX): Zero expense ratio!
    • Fidelity Total International Index Fund (FTIHX): Very low expense ratio.
  • Total US Bond Market:
    • Fidelity US Bond Index Fund (FXNAX): Low expense ratio, tracks the Bloomberg Barclays US Aggregate Bond Index.

Important Considerations when Choosing Funds:

  • Expense Ratios: The lower, the better.
  • Tracking Error: How closely the fund follows its benchmark index. Look for funds with low tracking error.
  • Fund Size: Larger funds tend to be more stable and have tighter tracking error.
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4. Purchase Your Funds:

  • Once your account is funded, navigate to the “Trade” section on the Fidelity website or app.
  • Enter the ticker symbol of each fund and the dollar amount you want to invest in each.
  • Make sure the dollar amounts reflect your desired asset allocation.
  • Review your order and confirm the trade.

5. Rebalance Periodically:

Over time, your asset allocation will drift due to market fluctuations. Rebalancing involves selling some of the overperforming assets and buying more of the underperforming assets to bring your portfolio back to your target allocation.

  • Frequency: Rebalance annually or semi-annually.
  • Threshold: Consider rebalancing when an asset class deviates from its target allocation by 5% or more.

Example:

Let’s say you have a $10,000 portfolio with a moderate asset allocation (60% Stocks, 40% Bonds).

  • US Stocks (40%): $4,000 in FZROX or FSKAX
  • International Stocks (20%): $2,000 in FZILX or FTIHX
  • US Bonds (40%): $4,000 in FXNAX

Tips for Success:

  • Start Small and Invest Regularly: Even small, consistent contributions can add up significantly over time. Consider setting up automatic investments.
  • Stay the Course: Market fluctuations are inevitable. Don’t panic sell during downturns. Remember, you’re investing for the long term.
  • Reinvest Dividends: Choose to reinvest dividends to automatically purchase more shares of your funds, compounding your returns over time.
  • Consider Tax Implications: Be mindful of the tax implications of your investments, especially in taxable brokerage accounts. Consider tax-advantaged accounts like IRAs and 401(k)s.
  • Seek Professional Advice if Needed: If you’re unsure about any aspect of building or managing your 3-fund portfolio, consult with a qualified financial advisor.
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Conclusion:

Building a 3-fund portfolio at Fidelity is a simple yet powerful way to achieve your long-term financial goals. By diversifying across the entire market, keeping costs low, and staying disciplined, you can create a solid foundation for your financial future. Remember to review your portfolio regularly and adjust your asset allocation as your circumstances change. Happy investing!


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2 Comments

  1. @kentfaver

    Thanks – remember that FSKAX is already 20% bonds.

    Reply
  2. @jvan6582

    If just starting out should you aim for 80/20 or for 20yrs plus do 34-33-33%?

    Reply

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