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

An exchange-traded fund (ETF) is a collection of investments bundled together and sold as one package on a stock exchange. Instead of buying Apple, Microsoft, and Tesla individually, you can buy one ETF that holds all three — plus dozens or hundreds of other companies — in a single transaction. The price of the ETF moves up and down based on the value of everything inside it.

You trade ETFs the same way you trade individual stocks: through a brokerage account, during market hours, at whatever the current market price is. That's different from mutual funds, which you buy and sell once per day at a fixed price set after the market closes. ETFs are also cheaper to own than mutual funds because they have lower management fees.

The fund itself is managed by a company — Vanguard, BlackRock, and Invesco are the largest — but you own your shares directly. You're not paying someone to pick stocks for you; the ETF straightforward tracks a list, like the S&P 500 or the Nasdaq 100, or it holds bonds, commodities, or a mix of all three.

Key Takeaways

  • An ETF holds many stocks or bonds in one package that trades on a stock exchange like a single stock.
  • You can buy and sell ETF shares during market hours at the current market price through any brokerage account.
  • ETFs are cheaper to own than mutual funds because management fees are lower and you're not paying for active stock picking.
  • Most ETFs track a fixed list of investments, like the S&P 500 or a specific industry, rather than having a manager choose what to hold.
  • You own your ETF shares outright and can hold them as long as you want, sell them whenever the market is open, or use them in retirement accounts.

How an ETF differs from buying individual stocks

When you own individual stocks, you own pieces of specific companies. You make money if those companies do well, and you lose money if they don't. You also have to decide which companies to buy, when to buy them, and when to sell — and you pay a commission each time you trade.

An ETF spreads your money across many companies at once. If one company in the ETF has a bad quarter, the others may offset that loss. You also own the ETF with a single purchase, so you pay one commission instead of many. Most importantly, you don't have to pick which companies to include — the ETF's structure does that for you.

The tradeoff is that you can't outperform the list the ETF tracks. If you buy an S&P 500 ETF, you'll match the S&P 500's return, minus a small fee. You won't beat it, but you also won't fall far behind it.

How an ETF differs from a mutual fund

Mutual funds and ETFs both hold baskets of investments, but they work differently in practice. A mutual fund is priced once per day, after the stock market closes. You place an order during the day, but you don't know the price until that evening. An ETF is priced constantly during market hours, like a stock, so you see the price before you buy.

Mutual funds often have higher fees because a manager or team actively decides what to buy and sell. ETFs usually just track a list, so the fees are lower. Mutual funds also generate more taxable gains inside the fund, which can cost you money even in years when the fund itself lost value. ETFs are more tax-efficient because of how they're structured.

Both can be held in retirement accounts like a 401(k) or IRA. Both let you invest in many companies at once. But if you're buying and selling during the day, an ETF gives you more control over the price you pay.

Types of ETFs and what they track

The most common type is an index ETF, which tracks a specific list of stocks or bonds. An S&P 500 ETF holds the same 500 large U.S. companies as the S&P 500 index. A Nasdaq 100 ETF holds the 100 largest tech and growth companies. A bond ETF might hold U.S. Treasury bonds or corporate bonds. These are "passive" because the fund just follows the list; no one is actively picking winners.

Some ETFs are sector ETFs, which focus on one industry — technology, healthcare, energy, or finance. Others are international ETFs, which hold stocks from other countries. There are also commodity ETFs that track the price of gold, oil, or agricultural products, and bond ETFs that hold different types of debt.

A smaller group of ETFs are actively managed, meaning a manager picks the holdings instead of tracking a fixed list. These charge higher fees but aim to beat the market. Most investors start with index ETFs because they're cheaper and simpler.

How to buy an ETF through a brokerage account

You need a brokerage account to buy an ETF — an account with a company like Fidelity, Charles Schwab, E-Trade, or Vanguard. If you don't have one, you'll open it online by providing your name, address, Social Security number, and employment information. The process takes 10 to 15 minutes.

Once your account is open and funded with cash, you search for the ETF by its ticker symbol — a short code like SPY for the S&P 500 ETF or QQQ for the Nasdaq 100 ETF. You enter how many shares you want to buy, review the current price, and place the order. During market hours (9:30 a.m. to 4 p.m. Eastern time on weekdays), the order fills almost when ready at or near the price you saw. After hours, your order waits until the market opens the next day.

You'll see the ETF shares in your account when ready after the order fills. You can hold them as long as you want, sell them whenever the market is open, or transfer them to a retirement account like an IRA.

Costs and fees you'll pay as an ETF owner

The main cost is the expense ratio, a yearly fee charged by the fund company. It's expressed as a percentage of what you own. A fund with a 0.03% expense ratio costs you $3 per year for every $10,000 you invest. Most index ETFs charge between 0.03% and 0.20% per year. Actively managed ETFs typically charge 0.50% to 1.50% or more.

You may also pay a trading commission when you buy or sell, though most major brokerages now charge zero commission for stock and ETF trades. Some brokerages charge a small fee if you trade after hours or use certain order types, but standard daytime trades are free.

If you sell an ETF for more than you paid for it, you'll owe capital gains tax on the profit. The tax rate depends on how long you held it — less than a year is taxed as ordinary income, more than a year gets a lower long-term rate. If you hold the ETF in a retirement account like a 401(k) or Roth IRA, you don't pay tax on gains until you withdraw the money (or never, in a Roth).

Why people choose ETFs over other investments

ETFs offer low cost, simplicity, and when ready diversification. You get exposure to hundreds of companies with one purchase, which reduces the risk that any single company's failure will hurt you much. The fees are transparent and usually much lower than paying a financial advisor or buying an actively managed mutual fund.

They're also flexible. You can buy and sell during the day, so you're not locked into a price set after the market closes. You can hold them in a regular taxable account or a retirement account. You can use them to build a straightforward portfolio of just a few ETFs — for example, one U.S. stock ETF, one international stock ETF, and one bond ETF — and let them sit for years.

ETFs are also transparent. You can see exactly what's inside the fund at any time, and the holdings don't change unless the underlying list changes. There are no surprises about what you own.

Frequently Asked Questions

Do I need a lot of money to start buying ETFs?

No. Most brokerages let you buy a single share of an ETF, which might cost $50 to $200 depending on the fund. You can start with whatever amount you have and add more over time. Some brokerages also offer fractional shares, so you can invest any dollar amount, even $1.

Can I lose all my money in an ETF?

An ETF can go down in value, and you can lose money if you sell when the price is lower than what you paid. But because an ETF holds many investments, it's unlikely to go to zero unless the entire market collapses. Individual stocks can disappear; diversified ETFs are much more stable.

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

A stock is ownership in one company. An ETF is ownership in a basket of many investments. Stocks are riskier because one company's failure can wipe out your investment. ETFs spread that risk across many holdings, so one bad performer doesn't hurt as much.

Can I hold an ETF in a retirement account like an IRA?

Yes. You can buy ETFs inside a traditional IRA, Roth IRA, 401(k), or other retirement account. The tax treatment depends on the account type — in a Roth IRA, gains are tax-free; in a traditional IRA, you pay tax when you withdraw. Check with your brokerage or employer plan to see which ETFs are available in your specific account.

How do I know which ETF to buy?

Start by deciding what you want to own — U.S. stocks, international stocks, bonds, or a mix. Then look at the expense ratio and pick the cheapest option. For a beginner, a single broad market ETF like an S&P 500 ETF is a solid choice. You can also build a straightforward three-fund portfolio with a U.S. stock ETF, an international stock ETF, and a bond ETF.