An ETF is a fund that holds many stocks or bonds, trades like a single stock, and usually costs less than buying those holdings separately

ETF stands for exchange-traded fund. It 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.

The main reason people use ETFs instead of buying individual stocks is cost and simplicity. An ETF that tracks the S&P 500, for example, gives you ownership in 500 large U.S. companies with a single purchase. The fees are typically lower than paying a financial advisor to pick stocks for you, and lower than mutual funds that do similar work.

ETFs trade during regular market hours — 9:30 a.m. to 4 p.m. Eastern time on weekdays when the market is open. You can buy or sell shares at any time during those hours, at whatever price the market sets at that moment. A mutual fund, by contrast, only prices once per day after the market closes.

Key Takeaways

  • An ETF holds a collection of stocks, bonds, or other investments and trades as a single unit on a stock exchange.
  • You pay a fee each year (usually between 0.03% and 0.50% of your investment) to hold an ETF, which covers the fund manager's costs.
  • ETFs are more tax-efficient than mutual funds because of how they are structured, meaning you may owe less in capital gains tax.
  • The price of an ETF share changes throughout the trading day based on what buyers and sellers agree to pay, just like any stock.

How an ETF holds your money

When you buy shares of an ETF, your money goes into a pool managed by a fund company. That company uses the pool to buy the stocks or bonds the ETF is designed to hold. If you own 100 shares of an S&P 500 ETF, you own a proportional piece of all 500 companies in that index.

The fund company does not manage the money actively — most ETFs simply track an index, meaning they buy whatever stocks are in that index and hold them. An index is a predetermined list: the S&P 500, the Nasdaq 100, the total U.S. bond market, and so on. The fund buys what is on the list and rebalances when the list changes.

Some ETFs are actively managed, meaning a human manager picks which stocks or bonds to buy. These charge higher fees because the manager is making decisions. Most investors start with index-tracking ETFs because the fees are lower and the results are predictable.

What you pay to own an ETF

Every ETF charges an annual fee called an expense ratio. This is a percentage of your total investment that you pay each year, automatically deducted from the fund's value. A 0.10% expense ratio on a $10,000 investment costs $10 per year. A 0.50% ratio on the same $10,000 costs $50 per year.

Index-tracking ETFs typically charge between 0.03% and 0.20% per year. Actively managed ETFs often charge 0.50% to 1.00% or higher. Over decades, this difference compounds: a 0.10% fee versus a 0.75% fee can mean tens of thousands of dollars in difference on a six-figure portfolio.

You also pay a commission when you buy or sell ETF shares, though many brokers now offer commission-free trading. Check your brokerage's fee schedule before you open an account.

The difference between ETFs and mutual funds

Mutual funds and ETFs both hold baskets of investments, but they work differently in three ways. First, mutual funds price once per day after the market closes; ETFs price continuously during trading hours. Second, mutual funds often have higher expense ratios — typically 0.50% to 1.00% for index funds, higher for actively managed ones. Third, ETFs are more tax-efficient because of how they are structured legally, which can save you money on taxes in taxable accounts.

Mutual funds require you to buy and sell directly from the fund company. ETFs trade on an exchange like stocks, so you can buy from anyone selling at that moment. This also means ETF prices can drift slightly above or below the actual value of the holdings inside — a gap called the bid-ask spread — though this spread is usually tiny for popular ETFs.

Types of ETFs and what they track

ETFs exist for nearly every investment category. Stock ETFs track indexes like the S&P 500, the total U.S. market, international stocks, or specific sectors like technology or healthcare. Bond ETFs hold government bonds, corporate bonds, or high-yield bonds. There are also ETFs that track commodities like gold or oil, real estate (REITs), and even cryptocurrencies.

Some ETFs are broad-based, meaning they hold hundreds or thousands of securities to give you wide exposure. Others are focused, holding only stocks in one industry or region. A broad-based U.S. stock ETF might hold 3,000 companies; a technology sector ETF might hold 50 to 100.

The type you choose depends on what you want to own. A beginner often starts with a total U.S. stock market ETF or an S&P 500 ETF because they are simple, low-cost, and give you exposure to large, established companies.

How ETF prices move and what affects them

An ETF's price moves based on two things: the value of the stocks or bonds inside it, and supply and demand from buyers and sellers. If the companies in your ETF report strong earnings, the ETF price usually rises. If the bond market falls, a bond ETF price falls. These movements happen during trading hours, so you can watch your ETF's value change minute by minute.

The price you see on your screen is the market price — what someone is willing to pay right now. The net asset value (NAV) is the actual value of all the holdings divided by the number of shares outstanding. For most popular ETFs, these two prices are nearly identical. For less popular or newly launched ETFs, they can drift apart, which is why trading volume matters.

You cannot control when an ETF's price moves — that is determined by the market. You can only control when you buy and sell. Buying and holding for years is a common strategy because it avoids the cost and tax consequences of frequent trading.

Where to buy ETFs and how to get your free guide

You buy ETFs through a brokerage account — an online platform like Fidelity, Vanguard, Charles Schwab, or dozens of others. You open an account, link a bank account or transfer money in, and then search for the ETF by its ticker symbol (a short code like SPY for the S&P 500 ETF or BND for a total bond market ETF). You enter the number of shares you want and place the order during market hours.

Most brokerages offer commission-free trading on ETFs, meaning you pay no fee to buy or sell. You only pay the ETF's expense ratio and any bid-ask spread. Some brokerages also offer fractional shares, meaning you can buy a partial share if you do not have enough money for a full share.

Before opening an account, compare brokerages on their fees, research tools, and whether they offer the specific ETFs you want to buy. Many people use the same brokerage for years, so it is worth spending an hour reading reviews and comparing options.

Frequently Asked Questions

Can I lose all my money in an ETF?

You can lose money if the stocks or bonds inside the ETF fall in value, but you cannot lose more than you invested. If an ETF holds 500 stocks and one company goes bankrupt, that loss is spread across all shareholders. The only way to lose everything is if every single holding becomes worthless, which is extremely unlikely for a diversified ETF.

Do I get dividends from an ETF?

Many ETFs pay dividends — cash distributions from the companies or bonds inside the fund. You can choose to receive the cash or reinvest it automatically to buy more shares. Check the ETF's fact sheet to see its dividend yield, which tells you what percentage of your investment you receive as dividends each year.

What is the difference between an ETF and a stock?

A stock is ownership in one company. An ETF is ownership in many companies (or bonds, or other investments) bundled together. Stocks are riskier because one company's problems affect your entire investment. ETFs spread risk across many holdings, so one company's poor performance has a smaller impact.

Should I buy ETFs in a regular account or a retirement account?

ETFs work in both. In a retirement account like an IRA or 401(k), you get tax advantages — you do not pay taxes on gains until you withdraw the money. In a regular taxable account, you pay taxes on dividends and gains each year. Most people hold ETFs in both types of accounts as part of a larger investment plan.

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 for the lowest-cost ETF in that category. Compare expense ratios and trading volume. Higher volume means tighter bid-ask spreads and easier buying and selling. Read the fund's fact sheet to understand exactly what it holds.