An ETF is a basket of investments that trades like a stock

An exchange-traded fund (ETF) is a collection of stocks, bonds, or other securities bundled together and sold as a single investment that you can buy and sell during market hours, just like you would buy shares of Apple or Microsoft. Instead of owning one company's stock, you own a small piece of many companies or assets at once.

The fund itself is managed by a company that decides which securities go into the basket and in what proportions. When you buy one share of an ETF, you're buying a slice of that entire basket. If the ETF holds 100 different stocks, your single share gives you exposure to all 100.

ETFs trade on stock exchanges — the same places where individual stocks trade. This means you can buy or sell an ETF share at any time during market hours and see the price change in real time, unlike some other investment funds that only price once per day.

Key Takeaways

  • An ETF holds many securities in one fund, so buying a single ETF share gives you when ready diversification across dozens or hundreds of investments.
  • ETFs trade throughout the day on stock exchanges at prices that change minute by minute, unlike mutual funds which price once daily after markets close.
  • ETFs typically charge lower annual fees than actively managed mutual funds because many are designed to track an index rather than be managed by a team of analysts.
  • You can hold ETFs in regular taxable brokerage accounts or inside retirement accounts like IRAs and 401(k)s, and they generate capital gains and dividends like any stock investment.

How ETFs differ from mutual funds

Both ETFs and mutual funds hold baskets of securities, but they work differently in ways that affect cost and timing. A mutual fund prices once per day, after the market closes, and you buy or sell at that single daily price. An ETF prices continuously throughout the trading day, so the price you pay depends on when you place your order.

Mutual funds are often actively managed, meaning a fund manager or team makes decisions about which securities to buy and sell to try to beat the market. This active management costs money — mutual fund expense ratios (the annual fee you pay) often run 0.5% to 2% or higher. Many ETFs, by contrast, are passively managed, meaning they straightforward track an index like the S&P 500 or the Nasdaq-100. Passive ETFs typically charge 0.03% to 0.20% annually.

ETFs also tend to be more tax-efficient than mutual funds. The way ETFs are structured allows them to distribute fewer capital gains to shareholders, which means you may owe less in taxes each year if you hold the ETF in a taxable account.

Index-tracking ETFs versus actively managed ETFs

An index-tracking ETF holds the same securities in the same proportions as a published market index. For example, an S&P 500 ETF holds all 500 stocks in the S&P 500 in the exact weights the index uses. Your returns will closely match the index's returns, minus the small annual fee. Because the fund straightforward buys and holds the index components, turnover is low and costs are minimal.

An actively managed ETF has a manager or team that picks and chooses which securities to hold, trying to outperform a benchmark index. These ETFs charge higher fees because of the research and decision-making involved. Some actively managed ETFs focus on specific strategies — for example, buying dividend-paying stocks or companies in a particular sector like technology or healthcare.

Most ETF assets sit in index-tracking funds because the lower costs make them attractive for long-term investors. But actively managed ETFs exist for investors who believe a manager's stock-picking skill is worth the higher fee.

What you pay to own an ETF

When you buy an ETF through a brokerage, you typically pay a commission — a one-time fee per trade. Many brokerages now charge zero commission on ETF trades, though some still charge a small fee. Check your brokerage's fee schedule to know what you'll pay.

Once you own the ETF, you pay an annual expense ratio, which is a percentage of your investment deducted each year to cover the fund's operating costs. A 0.10% expense ratio means you pay $10 per year for every $10,000 invested. This fee is deducted automatically and you don't write a check — it straightforward reduces the fund's value slightly each day.

Some ETFs also pay dividends if the stocks or bonds inside them generate dividend income. You can choose to reinvest those dividends back into the ETF or take them as cash. You'll owe taxes on dividends in a taxable account, though not in a retirement account.

How ETFs fit into retirement and taxable accounts

You can hold ETFs in almost any type of investment account. In a 401(k) or IRA, ETFs grow tax-deferred, meaning you don't pay taxes on gains or dividends until you withdraw the money in retirement. In a regular taxable brokerage account, you owe taxes each year on any dividends and capital gains.

ETFs are popular in retirement accounts because their low fees mean more of your money stays invested and compounds over time. In a taxable account, their tax efficiency — the fact that they distribute fewer capital gains than mutual funds — makes them attractive for investors trying to minimize annual tax bills.

You can also hold ETFs in a custodial account for a child or in an education savings account like a 529 plan, depending on what your account provider allows.

Common types of ETFs and what they track

ETFs exist for nearly every investment category. Stock ETFs hold shares of companies and track indexes like the S&P 500, Nasdaq-100, or Russell 2000, or focus on specific sectors like technology, healthcare, or energy. Bond ETFs hold government or corporate bonds and track bond indexes. International ETFs hold stocks or bonds from companies outside the United States.

Commodity ETFs track the price of physical goods like gold, oil, or agricultural products. Real estate ETFs hold shares of real estate investment trusts (REITs). Specialty ETFs might focus on dividend-paying stocks, small-cap companies, or stocks that meet environmental or social criteria.

The range is broad enough that most investors can build a diversified portfolio using only ETFs. A straightforward approach might be one U.S. stock ETF, one international stock ETF, and one bond ETF.

Risks and limitations of ETFs

ETFs are not risk-free. If the stocks or bonds inside the ETF fall in value, so does the ETF. An index-tracking ETF that holds the entire S&P 500 will decline if the overall stock market declines. You could lose money, especially if you sell during a market downturn.

Some ETFs are thinly traded, meaning few people buy or sell them. If you own a thinly traded ETF and want to sell, you may have difficulty finding a buyer, or you may have to accept a lower price to sell quickly. Check the trading volume before buying an obscure ETF.

Leveraged and inverse ETFs — funds designed to move in the opposite direction of an index or to amplify gains — are complex and carry higher risk. They are meant for short-term trading, not long-term holding, and can lose value quickly.

Frequently Asked Questions

Can I lose money in an ETF?

Yes. If the securities inside the ETF fall in value, your investment falls too. An ETF that tracks the stock market will decline when the market declines. You could lose some or all of your investment, especially if you sell during a downturn.

Do I have to pay taxes on ETF dividends?

In a taxable brokerage account, yes — you owe taxes on dividends in the year they are paid. In a retirement account like an IRA or 401(k), dividends are not taxed until you withdraw money in retirement. You can also choose to reinvest dividends rather than take them as cash.

What's the difference between an ETF and a stock?

A stock is a share of one company. An ETF is a fund holding many stocks (or bonds, or other securities). When you buy one ETF share, you own a small piece of all the securities in the fund, giving you when ready diversification. A single stock gives you exposure to only that one company.

How do I buy an ETF?

You buy an ETF through a brokerage account, the same way you buy individual stocks. Open an account with a broker, deposit money, search for the ETF by its ticker symbol, and place a buy order during market hours. The ETF will settle in your account within two business days.

Are ETFs better than mutual funds?

ETFs and mutual funds each have advantages. ETFs typically charge lower fees, trade throughout the day, and are more tax-efficient. Mutual funds offer active management and may appeal to investors who want a manager making decisions. The choice depends on your goals, time horizon, and preference for active versus passive investing.