The Ultimate Fidelity Index Fund List: Best Low-Cost Funds To Build Wealth

Passive investing has revolutionized the way individuals build long-term wealth. By tracking broad market indices rather than trying to beat them through active trading, investors benefit from lower fees, minimized tax burdens, and consistent historical returns. Fidelity Investments has positioned itself at the forefront of this movement, offering some of the lowest expense ratios in the industry, including a suite of funds with absolute zero fees.

When constructing a diversified investment portfolio, selecting the right mutual funds is critical. This comprehensive guide breaks down the essential Fidelity index fund list, categorizing them by asset class, explaining the mechanics behind their rock-bottom fees, and outlining how to use them to construct a highly efficient, hands-off portfolio.

The Complete Fidelity Index Fund List

Fidelity offers index mutual funds covering domestic equities, international markets, bonds, and real estate. Many of these funds feature expense ratios that rival or beat those offered by Vanguard and Schwab, with no minimum investment requirements for retail accounts.

The table below highlights the core Fidelity index funds across major asset classes, outlining their ticker symbols, expense ratios, and primary benchmarks.

Deep Dive: Categorizing the Core Fidelity Index Funds

To build a resilient portfolio, it is important to understand what these specific index funds hold and how they behave under different market conditions.

US Equity Index Funds (Large Cap & Total Market)

The cornerstone of any US-based investment portfolio is domestic equity. FXAIX (Fidelity 500 Index Fund) tracks the S&P 500, offering exposure to roughly 500 of the largest, most stable companies in the United States, including tech giants like Apple, Microsoft, and Nvidia. With an expense ratio of just 0.015%, it is one of the cheapest ways to own the core of the US economy.

For investors seeking broader exposure, FSKAX (Fidelity Total Market Index Fund) holds over 3,900 stocks. This includes large-cap, mid-cap, and small-cap companies. FSKAX provides complete coverage of the investable US stock market, ensuring that you do not miss out on the growth of emerging mid-sized and small enterprises.

International and Emerging Market Exposure

Investing solely in the US market exposes portfolios to single-country risk. To capture global growth, FTIHX (Fidelity Total International Index Fund) offers extensive coverage of both developed markets (like Japan, the UK, and Germany) and emerging markets (like India and Brazil). It holds more than 5,000 non-US stocks, making it an all-in-one international equity solution with a very low fee of 0.06%.

Fixed Income and Capital Preservation

Bonds act as a cushion during stock market downturns. FXNAX (Fidelity U.S. Bond Index Fund) tracks the broader US investment-grade bond market, consisting of US Treasuries, government agency bonds, and high-quality corporate debt. With an expense ratio of 0.025%, FXNAX provides steady income and volatility mitigation without eating away at yield through high management fees.

Decoding Fidelity ZERO Mutual Funds: Are They Truly Free?

In 2018, Fidelity disrupted the asset management industry by introducing the "ZERO" lineup of mutual funds. These funds carry an expense ratio of exactly 0.00% and have no minimum investment requirements, allowing retail investors to invest completely free of management fees.

┌──────────────────────────────┐ │ Fidelity ZERO Funds (0.00%) │ └──────────────┬───────────────┘ │ ┌─────────────────────────┴─────────────────────────┐ ▼ ▼ ┌─────────────────────────────┐ ┌─────────────────────────────┐ │ Proprietary Indices │ │ Non-Transferable (In-Kind) │ ├─────────────────────────────┤ ├─────────────────────────────┤ │ Uses custom-built indexes │ │ Must liquidate to move out │ │ to bypass costly S&P/MSCI │ │ of Fidelity, potentially │ │ third-party licensing fees. │ │ triggering taxable events. │ └─────────────────────────────┘ └─────────────────────────────┘

Fidelity manages to offer these funds for free by using proprietary, custom-built indexes instead of paying expensive licensing fees to third parties like S&P Dow Jones or MSCI. For example, instead of tracking the S&P 500, FNILX tracks the Fidelity U.S. Large Cap Index. The performance correlation between these proprietary indexes and major benchmarks is nearly identical, meaning investors sacrifice very little tracking accuracy in exchange for the zero-fee structure.

However, there is an important caveat to keep in mind: Fidelity ZERO funds are non-transferable. If you decide to move your brokerage account from Fidelity to another custodian (such as Vanguard or Charles Schwab) in the future, you cannot transfer these funds "in-kind." You will be forced to liquidate your ZERO fund holdings into cash before initiating the transfer. If these funds are held in a taxable brokerage account, this liquidation will trigger a capital gains tax event. Consequently, Fidelity ZERO funds are best utilized inside tax-advantaged accounts like Traditional IRAs, Roth IRAs, or HSAs, where liquidations do not trigger tax consequences.

Pros and Cons of Investing in Fidelity Index Funds

Evaluating both sides of the coin helps determine if Fidelity's index offerings align with your broader investment strategy.

The Advantages

• Industry-Leading Expense Ratios: Fidelity offers some of the lowest expense ratios in the financial sector, frequently beating Vanguard on cost.
• No Minimum Investments: Unlike some brokerages that require a $3,000 minimum to access institutional-grade mutual fund share classes, Fidelity allows investors to start with as little as $1.
• Automatic Investing and Fractional Shares: Fidelity enables investors to set up recurring investments for mutual funds in exact dollar amounts, making dollar-cost averaging completely frictionless.
• Excellent Customer Service and Platform: Fidelity's digital platform, mobile app, and physical branch access provide a premium user experience alongside their low-cost investment products.

The Drawbacks

• Proprietary Index Tracking: While ZERO funds save on fees, their custom indexes may experience minor tracking differences compared to mainstream indices during highly volatile market cycles.
• Mutual Fund Settlement Times: Unlike Exchange-Traded Funds (ETFs) which trade throughout the day like individual stocks, mutual funds only price and execute trades once per day after the market closes.
• Transfer Constraints: The inability to transfer ZERO funds in-kind limits long-term flexibility if you choose to consolidate assets at another custodian later in life.

How to Build a Simple Portfolio with Fidelity Funds

You do not need a complicated arrangement of dozens of funds to achieve excellent investment returns. In fact, simpler portfolios are easier to manage, rebalance, and optimize over time.

The Classic Three-Fund Portfolio

One of the most popular asset allocation models is the Three-Fund Portfolio. It balances US equities, international equities, and fixed-income bonds to match an individual's specific risk tolerance.

┌────────────────────────────────────────────────────────┐ │ Balanced Three-Fund Portfolio │ └───────────────────────────┬────────────────────────────┘ │ ┌─────────────────────────┼─────────────────────────┐ ▼ ▼ ▼ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │ US Equities │ │ Int'l Equities │ │ US Bond Market│ ├─────────────────┤ ├─────────────────┤ ├─────────────────┤ │ FSKAX (Total) │ │ FTIHX (Total) │ │ FXNAX (Total) │ │ or │ │ or │ │ │ │ FZROX (Zero) │ │ FZILX (Zero) │ │ │ └─────────────────┘ └─────────────────┘ └─────────────────┘

To construct this setup using Fidelity’s high-quality offerings:

1. US Equity Core: Allocate the majority of your stock portion to FSKAX (or FZROX inside an IRA) for broad domestic market coverage.
2. International Diversifier: Allocate a portion to FTIHX (or FZILX inside an IRA) to capture global growth outside of North America.
3. Fixed-Income Safety Net: Allocate the remaining portion to FXNAX based on your age and risk tolerance.

For a younger investor with a high risk tolerance, a portfolio split of 70% FSKAX, 20% FTIHX, and 10% FXNAX balances aggressive capital growth with minor hedging. An investor closer to retirement might adjust the allocations to 40% FSKAX, 20% FTIHX, and 40% FXNAX to preserve capital and generate reliable fixed income.

Frequently Asked Questions

Which is better: FXAIX or FSKAX?

Neither fund is objectively better; they simply serve different asset allocation strategies. FXAIX tracks the S&P 500, focusing strictly on large-cap US companies. FSKAX is a total stock market index fund, holding thousands of mid- and small-cap stocks in addition to the S&P 500 constituents. Over long periods, their performance remains closely correlated because large-cap stocks dominate the market capitalization of total market funds. FSKAX offers slightly higher diversification.

Can I buy Vanguard index funds on Fidelity's platform?

While you can purchase Vanguard Exchange-Traded Funds (ETFs) like VOO or VTI on Fidelity's platform with zero transaction fees, purchasing Vanguard mutual funds (such as VFIAX or VTSAX) on Fidelity will typically incur a steep transaction fee (often around $75 per trade). To avoid these transaction fees, use Fidelity's equivalent mutual funds, which perform almost identically and often carry even lower expense ratios.

Do Fidelity ZERO funds pay dividends?

Yes. Just like standard index funds, Fidelity ZERO funds (such as FZROX and FZIPX) distribute dividends and capital gains to investors. Most of these funds distribute dividends on an annual basis, typically in December, which can be automatically reinvested into the fund.

What is the difference between a mutual fund and an ETF at Fidelity?

Fidelity mutual funds are priced and traded only once per day after market close at the Net Asset Value (NAV). They allow for automated, exact-dollar recurring investments. Fidelity ETFs (and other third-party ETFs) trade in real-time throughout the market day at fluctuating market prices. Both vehicles are excellent for passive investing, but mutual funds are often preferred by those who want to automate their investing schedule completely.

Maximize Your Portfolio Efficiency

Minimizing investment costs is one of the few guaranteed ways to boost your net portfolio returns over time. By utilizing Fidelity’s low-cost index funds and zero-fee offerings, you keep more of your hard-earned capital working for you.

Review your current portfolio allocation, identify any high-expense funds, and consider switching to these institutional-grade, low-cost alternatives to optimize your long-term wealth accumulation.