An ETF is a fund that holds many stocks or bonds, trades like a stock, and costs less to own than buying each holding separately
An exchange-traded fund (ETF) is a basket of investments — usually stocks, bonds, or a mix — bundled into one security that you buy and sell on a stock exchange the same way you would buy shares of Apple or Microsoft. When you own an ETF, you own a small piece of everything inside it. If an ETF holds 500 different stocks, buying one share of that ETF gives you exposure to all 500 without having to purchase each one individually.
The main reason people use ETFs is cost. A financial advisor or mutual fund manager who picks individual stocks for you charges fees that can run 0.5% to 2% of your money every year. Most ETFs charge between 0.03% and 0.20% annually because they straightforward track an index — a predetermined list of stocks or bonds — rather than paying someone to choose holdings. Over decades, that difference compounds into thousands of dollars.
ETFs also trade during market hours, which means you can buy or sell them at any time the stock market is open. A mutual fund, by contrast, only prices once per day after the market closes. That flexibility matters if you need to move money quickly or want to time a trade to a specific price.
Key Takeaways
- An ETF holds dozens, hundreds, or thousands of stocks or bonds in a single fund that trades like a stock on an exchange.
- Most ETFs track an index, meaning they automatically hold whatever stocks or bonds are in that index, keeping costs low.
- You pay an annual fee called an expense ratio, typically between 0.03% and 0.20%, rather than paying a manager to pick stocks.
- ETFs trade during market hours at prices that change throughout the day, unlike mutual funds which price once daily.
- An ETF can hold U.S. stocks, international stocks, bonds, commodities, or a combination, depending on the fund's stated goal.
How an ETF's holdings are chosen
Most ETFs are index funds, meaning they track a specific index. An index is straightforward a list of securities chosen by a rule, not by a person's judgment. The S&P 500 index, for example, contains 500 large U.S. companies selected by a committee at Standard & Poor's based on size, liquidity, and other criteria. An S&P 500 ETF automatically holds all 500 of those stocks in the same proportions as the index itself.
When a company joins or leaves the S&P 500, the ETF automatically adjusts its holdings to match. You do not have to do anything. This automatic rebalancing is one reason index-based ETFs have such low fees — there is no team of analysts debating which stocks to buy or sell.
Some ETFs are actively managed, meaning a fund manager or team decides which securities to hold. These ETFs charge higher fees — often 0.5% to 1% annually — because someone is being paid to make those choices. Active ETFs are less common than index ETFs, and they do not always outperform their index-based counterparts over long periods.
What you pay to own an ETF
The main cost of owning an ETF is the expense ratio, a yearly fee expressed as a percentage of your investment. If an ETF has a 0.10% expense ratio and you own $10,000 of it, you pay $10 per year. That fee is deducted automatically from the fund's value; you do not write a check.
When you buy or sell an ETF through a brokerage account, you may also pay a trading commission — a one-time fee per transaction. Many brokerages now charge zero commission on ETF trades, but some still charge $5 to $10 per trade. Check your brokerage's fee schedule before you open an account.
If you buy an ETF at one price and it rises or falls before you sell, you may owe capital gains tax on the profit. That tax is separate from the expense ratio and depends on how long you held the ETF and your income level. ETFs are generally more tax-efficient than mutual funds because of how they are structured, but taxes still explore.
The difference between ETFs and mutual funds
ETFs and mutual funds both hold baskets of securities, but they work differently in ways that matter to your wallet. A mutual fund prices once per day after the market closes; an ETF prices continuously throughout the trading day. That means an ETF's price changes minute by minute, while a mutual fund's price is fixed until the next day.
Mutual funds are bought and sold directly from the fund company, while ETFs trade on an exchange like stocks. You can place a limit order on an ETF — telling your broker to buy only if the price drops to a certain level — but you cannot do that with a mutual fund.
Expense ratios for index mutual funds and index ETFs are often similar, but ETFs typically have a slight edge in cost. More importantly, ETFs generate fewer taxable events inside the fund itself, which means you pay less in taxes over time even if you hold the fund for decades. Mutual funds sometimes distribute large capital gains to shareholders, triggering a tax bill even if you did not sell.
Types of ETFs and what they track
An equity ETF holds stocks. It might track the S&P 500, the entire U.S. stock market, stocks in a specific industry like technology or healthcare, or stocks in a specific country or region like Japan or emerging markets.
A bond ETF holds bonds — loans to governments or corporations. Different bond ETFs hold short-term bonds, long-term bonds, government bonds, corporate bonds, or bonds from specific countries. Bond ETFs tend to be less volatile than stock ETFs but also produce lower returns over long periods.
A commodity ETF holds physical commodities like gold, oil, or agricultural products, or holds futures contracts on those commodities. These ETFs are used to hedge against inflation or diversify away from stocks and bonds.
A balanced or asset allocation ETF holds a mix of stocks, bonds, and sometimes other assets in a single fund. These are designed for people who want a complete portfolio in one purchase.
How to buy an ETF
You cannot buy an ETF directly from the fund company the way you might buy a mutual fund. Instead, you open a brokerage account — an account that lets you trade stocks and ETFs — with a broker like Fidelity, Schwab, E-Trade, or Vanguard. You deposit money into that account, search for the ETF by its ticker symbol (a short code like SPY or VOO), and place a buy order just as you would for a stock.
Your order executes during market hours at the current market price. If you place an order after the market closes, it will execute the next time the market opens. Once the trade settles — usually two business days later — the ETF shares appear in your account and you own them.
You can hold an ETF in a regular taxable brokerage account, or you can hold it inside a retirement account like a 401(k) or IRA. Many employers offer ETFs as investment choices within their 401(k) plans. If you hold an ETF in an IRA, you do not pay taxes on gains until you withdraw the money in retirement.
Risks and limitations of ETF investing
An ETF is only as safe as the securities it holds. If you own a stock ETF and the stock market drops 20%, your ETF drops 20% too. There is no protection built in. Bond ETFs can lose value if interest rates rise. Commodity ETFs can be volatile if the underlying commodity's price swings sharply.
Some ETFs are thinly traded, meaning few people buy or sell them on any given day. If you own a thinly traded ETF and try to sell a large position, you may have to accept a lower price to find a buyer. Check the trading volume — the number of shares traded per day — before you buy an obscure ETF.
ETFs that track narrow sectors or use complex strategies like leverage or inverse exposure can be riskier and more expensive than broad market ETFs. A beginner investor is usually better served by a straightforward, low-cost ETF that tracks a broad index.
Frequently Asked Questions
Can I lose money in an ETF?
Yes. If the stocks or bonds inside the ETF fall in value, your ETF falls too. The only way to avoid that loss is to not own the ETF. Diversification — owning many different securities — reduces risk but does not eliminate it.
Do I get dividends from an ETF?
Many ETFs do pay dividends. If the stocks or bonds inside the ETF pay dividends or interest, the ETF collects that money and distributes it to shareholders, usually quarterly or annually. You can take the dividend as cash or reinvest it to buy more shares of the ETF.
What is the difference between an ETF and an index fund?
An index fund is any fund that tracks an index. Most index funds are mutual funds, but some are ETFs. So all index ETFs are index funds, but not all index funds are ETFs. The key difference is how they trade: ETFs trade like stocks during market hours, while index mutual funds price once per day.
How much money do I need to start investing in ETFs?
You can buy a single share of most ETFs, and share prices typically range from $20 to $200. Some brokerages have no minimum account balance. You could start with $100 or $500, though most financial advisors suggest building an emergency fund first before investing.
Should I pick individual ETFs or use a robo-advisor?
A robo-advisor is a service that builds and manages a portfolio of ETFs for you based on your age and risk tolerance, usually charging 0.25% to 0.50% annually. If you want to pick your own ETFs and rebalance them yourself, you can do that for just the ETF expense ratio. The choice depends on whether you want to manage your investments or prefer to hand that task to an algorithm.