An ETF is a basket of stocks or bonds you can buy and sell like a single stock

ETF stands for exchange-traded fund. It is a collection of investments — usually stocks, bonds, or a mix of both — bundled together and sold as one unit on a stock exchange. You buy and sell ETF shares the same way you would buy and sell shares of Apple or Microsoft: through a brokerage account, during market hours, at a price that changes throughout the day.

The key difference between an ETF and buying individual stocks is that one ETF share gives you ownership in dozens, hundreds, or sometimes thousands of different companies or bonds at once. Instead of researching and buying 50 different stocks separately, you buy one ETF that holds all 50. A fund manager or automated system decides which investments go into the ETF and rebalances it over time.

ETFs trade on major stock exchanges like the NYSE or NASDAQ. You see the price tick up and down during the trading day, just like any stock. This is different from mutual funds, which only price once per day after the market closes.

Key Takeaways

  • An ETF is a collection of stocks, bonds, or other investments packaged as a single security you can buy or sell through a brokerage account.
  • ETF prices change throughout the trading day because they trade on stock exchanges, unlike mutual funds which price once daily.
  • You pay a fee (called an expense ratio) each year to own an ETF, typically ranging from 0.03% to 1% of your investment depending on the fund type.
  • ETFs can track a specific index like the S&P 500, focus on a particular sector like technology or healthcare, or hold a mix of asset types based on a strategy.
  • You can hold an ETF in a regular brokerage account, a retirement account like an IRA, or a 401(k) if your employer's plan offers it.

How an ETF differs from a mutual fund

Both ETFs and mutual funds hold a collection of investments, but they work differently in practice. A mutual fund pools money from many investors and a professional manager buys and sells holdings to try to beat the market or track an index. You buy mutual fund shares directly from the fund company, and the price is set once per day after the market closes at 4 p.m. Eastern time.

An ETF also pools investor money, but it trades on an exchange like a stock. You buy and sell ETF shares through a brokerage, and the price updates every few seconds during trading hours. Most ETFs are passive — they simply track an index like the S&P 500 and do not try to beat it. Because they require less active management, ETFs typically charge lower annual fees than mutual funds.

Both can be held in retirement accounts, and both let you own many investments with a single purchase. The choice often comes down to cost, trading flexibility, and whether you want active management or index tracking.

What you pay to own an ETF

The main cost of owning an ETF is the expense ratio, an annual fee expressed as a percentage of your investment. If an ETF has a 0.10% expense ratio and you own $10,000 worth of shares, you pay $10 per year. This fee is deducted automatically from the fund's value — you do not write a check.

Expense ratios vary widely. Index-tracking ETFs that simply hold the same stocks as the S&P 500 or another benchmark often charge 0.03% to 0.20% per year. Actively managed ETFs, which have a manager making buy-and-sell decisions, typically charge 0.50% to 1.50% or higher. Specialized ETFs focused on a narrow sector or strategy may also charge more.

You may also pay a trading commission when you buy or sell ETF shares, depending on your brokerage. Many brokerages now offer commission-free ETF trading, but some still charge $5 to $10 per trade. Check your brokerage's fee schedule before you open an account.

Common types of ETFs and what they track

The most common type is an index ETF, which holds the same stocks as a well-known index. An S&P 500 ETF, for example, owns shares in all 500 companies in that index in roughly the same proportions. Other index ETFs track the Nasdaq-100, the Dow Jones Industrial Average, international stock indexes, or bond indexes.

Sector ETFs focus on a single industry or area of the economy. A technology ETF holds mostly software, semiconductor, and hardware companies. A healthcare ETF holds pharmaceutical, medical device, and hospital companies. These let you bet on a particular part of the economy without picking individual stocks.

Asset allocation ETFs hold a mix of stocks and bonds in a set ratio — for example, 60% stocks and 40% bonds. Some are designed for a specific life stage or risk level. A target-date ETF automatically shifts from stocks toward bonds as you approach retirement.

Specialty ETFs track narrower themes: dividend-paying stocks, companies with low debt, emerging markets, commodities like gold or oil, or even specific trends like renewable energy or artificial intelligence. These carry higher expense ratios because they require more active management or focus on a smaller universe of investments.

How to buy and sell ETF shares

To buy an ETF, you need a brokerage account. Open one with a major brokerage like Fidelity, Vanguard, Charles Schwab, or a discount broker. The process takes 10 to 15 minutes online and requires basic personal information, proof of identity, and a funding method (bank account or wire transfer).

Once your account is open and funded, search for the ETF by its ticker symbol — a short code like SPY (S&P 500 ETF), QQQ (Nasdaq-100 ETF), or BND (bond ETF). Enter the number of shares you want to buy and place the order during market hours (9:30 a.m. to 4 p.m. Eastern, Monday through Friday). The order executes at the current market price, which may differ slightly from the price you saw when you placed the order.

To sell, you log into your account, find the ETF, and enter the number of shares to sell. The order executes at the current market price during trading hours. You can sell anytime the market is open, which gives you more flexibility than mutual funds.

ETFs in retirement and regular accounts

You can hold ETFs in a regular taxable brokerage account, where you pay capital gains tax when you sell at a profit. You can also hold them in tax-advantaged retirement accounts like a traditional IRA, Roth IRA, or SEP-IRA. Many employer 401(k) plans offer a selection of ETFs alongside mutual funds.

Holding ETFs in a retirement account has tax advantages. In a traditional IRA or 401(k), you do not pay tax on gains or dividends until you withdraw money in retirement. In a Roth IRA, may have access to withdrawals are tax-free. Because ETFs are tax-efficient — they generate fewer taxable distributions than actively managed mutual funds — they are often a good choice for retirement accounts.

If you are just starting out, many brokerages let you buy fractional ETF shares, meaning you can invest $50 or $100 in an ETF even if one full share costs $200. This makes it easier to build a diversified portfolio with a small amount of money.

Risks and things to watch for

ETFs are not risk-free. If the stocks or bonds in the fund decline in value, your ETF shares decline too. An index ETF that tracks the S&P 500 will fall if the stock market falls. A bond ETF will fall if interest rates rise. Sector ETFs are more volatile because they concentrate in one area of the economy.

Some ETFs use leverage or derivatives to amplify returns, which can magnify losses. Inverse ETFs are designed to profit when the market falls, which can be confusing for new investors. Read the fund's prospectus or fact sheet to understand what it holds and how it works.

Expense ratios matter over time. A 1% annual fee on a $10,000 investment costs $100 per year. Over 30 years, that compounds significantly. Compare expense ratios across similar ETFs — often you can find index ETFs with nearly identical holdings but vastly different fees.

Frequently Asked Questions

Can I lose money in an ETF?

Yes. If the stocks or bonds in the ETF decline in value, your shares decline too. ETFs are not insured or may provide. The value of your investment can go down as well as up, depending on market conditions and the specific holdings in the fund.

Do ETFs pay dividends?

Many do. If the stocks or bonds in an ETF pay dividends or interest, the ETF typically distributes those payments to shareholders quarterly or annually. You can choose to reinvest dividends automatically or receive them as cash, depending on your brokerage.

What is the difference between an ETF and a stock?

A stock is ownership in a single company. An ETF is ownership in a basket of many companies or bonds. Buying one ETF share gives you diversification across dozens or hundreds of investments, whereas buying one stock concentrates your money in one company.

Can I hold an ETF forever?

Yes. There is no time limit on holding an ETF. You can buy and hold for decades if you want. Some people use ETFs as the core of a long-term retirement portfolio and never sell.

How do I know which ETF to choose?

Start by deciding what you want to own — a broad market index, a specific sector, bonds, or a mix. Then compare expense ratios and trading volumes among similar ETFs. Higher trading volume means tighter bid-ask spreads and easier buying and selling. Read the fund fact sheet to confirm it holds what you think it does.