Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →You cannot buy the S&P 500 index itself. To invest in it, you generally buy shares of an index mutual fund or an exchange-traded fund (ETF) designed to track it. The key choice is usually not “index fund or ETF”: index describes the fund’s strategy, while ETF describes its structure. An index fund can be either a mutual fund or an ETF.
How do I invest in the S&P 500?
For U.S. investors, the usual route is to choose an S&P 500-tracking fund available through an investment account, then buy its shares. The fund—not the index—provides the investment exposure. The SEC explains that index funds offer an indirect way to invest in an index because an investor cannot buy the index directly (SEC: Index Funds).
As an Amazon Associate I earn from qualifying purchases.
- Choose an account. You might invest through a taxable brokerage account or an eligible tax-advantaged account, such as an IRA or workplace 401(k). What you can buy depends on the account provider and, for a workplace plan, its investment menu.
- Find a fund that seeks to track the S&P 500. Check its current prospectus and latest shareholder report for its objective, holdings approach, fees, risks, and performance disclosures.
- Choose the fund structure and place an order. Mutual-fund shares generally transact at the next calculated daily net asset value (NAV). ETF shares are bought and sold through a brokerage account on an exchange during market hours, at market prices.
- Review the investment in the context of your portfolio. An S&P 500 fund holds exposure to large U.S. companies represented in that index; it is not a complete portfolio of U.S. stocks, global stocks, or multiple asset classes.
Fund availability, share classes, minimums, and costs vary by provider and account. Do not assume a fund has no minimum or is free to buy just because it tracks an index.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
What is the difference between an index fund and an ETF?
The terms describe different things. “Index fund” refers to an investment approach: the fund aims to follow a market index. “ETF” refers to a structure whose shares trade on an exchange. An S&P 500-tracking fund may be an index mutual fund or an index ETF; the labels are not mutually exclusive.
#1 Best Overall
| Feature | S&P 500 index mutual fund | S&P 500 index ETF |
|---|---|---|
| When it trades | Purchases and redemptions generally receive the next daily NAV. | Shares trade on an exchange during market hours. |
| Price when you trade | Generally the fund’s NAV calculated once each business day. | The exchange market price, which may be above or below NAV. |
| How an individual investor typically accesses it | Through the fund company or a financial intermediary, depending on availability. | Through a brokerage account that can place exchange orders. |
| Costs to compare | Operating expenses and any applicable intermediary or account costs. | Operating expenses and any applicable brokerage costs, bid-ask spreads, or other trading frictions. |
| Taxable-account distributions | May distribute capital gains that create tax obligations. | May also distribute capital gains; its structure has historically often resulted in fewer such distributions than similar mutual funds, but that is not guaranteed. |
The SEC notes that ETF market prices do not necessarily match NAV: an investor may pay more than NAV when buying or receive less than NAV when selling (SEC: Exchange-Traded Funds (ETFs)). For a broader comparison, see the SEC’s Characteristics of Mutual Funds and Exchange-Traded Funds.
Which structure should you choose?
Neither structure is automatically better for every investor. The practical fit depends on the account, how you want to trade, total costs, and whether the fund is available to you.
Rank #2
- Ideal for Gifting
- Ideal for a bookworm
- Compact for travelling
An index mutual fund may fit when
- Your retirement plan offers an S&P 500 index mutual fund you want to use.
- You prefer fund-level purchases and redemptions priced at the daily NAV rather than placing exchange orders during the day.
- You have checked the fund’s share class, minimums, operating expenses, and any account or intermediary charges.
An index ETF may fit when
- You want to trade shares through a brokerage account during market hours.
- You understand that the trading price can differ from NAV and that order execution, spreads, or brokerage costs can affect your result.
- You have reviewed the fund’s costs and current disclosures rather than assuming every ETF is inexpensive.
Direct indexing is another route
With direct indexing, an investor owns individual stocks in an account through a provider instead of owning shares in a pooled mutual fund or ETF. It is a different, provider-mediated approach—not simply another name for buying an index fund. Its cost, complexity, and suitability depend on the specific service and investor; it should not be assumed to be cheaper or better.
How much does an S&P 500 fund cost?
Compare the fund’s current expense ratio with potential trading and account costs. Operating expenses reduce returns, and an “index” label does not guarantee the lowest fee. The SEC also notes that fees, trading costs, and tracking error can cause an index fund’s performance to lag its benchmark. Funds may hold every index security or use representative sampling, so tracking need not mean identical holdings or returns.
Fidelity Viewpoints reported an Investment Company Institute figure of 0.05% as the average expense ratio for index mutual funds in 2025. That is a dated, category-level average—not the fee for every index mutual fund or a quote for any particular S&P 500 fund. Check the specific fund’s current fee table and reports instead (Fidelity Viewpoints: ETF vs. index fund: What’s the difference?).
What should you know about taxes?
In a taxable brokerage account, either a mutual fund or an ETF may distribute capital gains with tax consequences. ETFs often distribute fewer capital gains than comparable mutual funds because of how many ETFs handle transactions in kind, but this is a tendency, not a guarantee of a particular fund’s distributions or your tax bill.
Rank #4
For investments held in tax-advantaged accounts such as a 401(k) or IRA, the SEC says the ETF-versus-mutual-fund structure does not create a tax difference. Your account type and individual circumstances matter; consult a tax professional for advice about your situation.
What risks come with investing in an S&P 500 fund?
An S&P 500 fund remains exposed to stock-market losses and to the companies and market segment represented by the index. It does not by itself spread an investment across bonds, international markets, or other asset classes. The fund’s tracking method and expenses can also affect how closely its results follow the index. Read the prospectus and latest shareholder report to understand the particular fund’s strategy, risks, costs, and performance.
Best Value
- It can be a gift option
- Comes with secure packaging
- Helpful in various ways
This overview is for general U.S. investor education, not individualized investment or tax advice. Fund availability, product rules, and tax treatment differ outside the United States.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
