An ETF is a fund that holds many stocks or bonds and trades like a single stock
ETF stands for exchange-traded fund. It is a basket of investments — usually stocks, bonds, or a mix of both — bundled together and sold as one package. You buy and sell an ETF the same way you buy and sell a single company's stock: through a brokerage account, during market hours, at a price that changes throughout the day.
The main difference between an ETF and owning individual stocks is simplicity. Instead of buying 50 different company stocks one by one, you can buy one ETF that already holds those 50 stocks inside it. The fund manager handles the buying, selling, and rebalancing. You own a small piece of everything in the fund.
ETFs are different from mutual funds in one key way: mutual funds are priced once per day after the market closes, while ETFs trade in real time during market hours, just like stocks. This means you see the price change minute by minute and can sell whenever you want during the trading day.
Key Takeaways
- An ETF is a collection of investments bundled into one product that trades like a stock on an exchange.
- You buy and sell ETFs through a brokerage account at prices that update throughout the trading day.
- ETFs charge annual fees (called expense ratios) that vary widely, so comparing costs matters before you buy.
- Some ETFs track a market index passively, while others are actively managed by a fund manager who picks investments.
- ETFs offer when ready diversification because one purchase gives you ownership in dozens or hundreds of holdings.
How an ETF holds your money
When you buy shares of an ETF, your money goes into a pool with other investors' money. A fund company uses that pool to buy the investments the ETF is designed to hold. If the ETF is supposed to track the S&P 500 (a list of 500 large U.S. companies), the fund manager buys stock in all 500 of those companies in the right proportions.
You own shares of the ETF itself, not the individual stocks inside it. If the ETF holds 100 stocks and you own 1,000 shares of the ETF, you own a tiny piece of all 100 stocks. The fund manager keeps track of all the holdings and handles all the buying and selling inside the fund. You just own the ETF shares.
The ETF trades on an exchange — usually the New York Stock Exchange or NASDAQ — just like any stock. You can see its price on any financial website, and you can buy or sell it any time the market is open.
Passive ETFs versus actively managed ETFs
Passive ETFs track an index, which is a pre-set list of investments. The fund manager does not pick which stocks to buy; instead, they buy all the stocks in the index in the same proportions. An S&P 500 ETF, for example, automatically holds all 500 companies in that index. The manager's job is just to keep the holdings matched to the index as it changes.
Actively managed ETFs have a manager who picks which investments to buy and sell, trying to beat the market or meet a specific goal. This requires more work, so actively managed ETFs usually charge higher annual fees than passive ones.
Most ETF investors choose passive ETFs because they cost less and are easier to understand. A passive ETF that tracks the S&P 500 might charge 0.03% per year, while an actively managed ETF might charge 0.50% or more. Over decades, that difference compounds significantly.
What you pay to own an ETF
ETFs charge an annual fee called an expense ratio, expressed as a percentage of your investment. If an ETF has a 0.10% expense ratio and you own $10,000 worth of it, you pay $10 per year. This fee is taken automatically from the fund's value; you do not write a check.
Expense ratios vary widely. Passive index ETFs often charge between 0.03% and 0.20% per year. Actively managed ETFs and specialized ETFs (like those focused on a single industry or a specific strategy) may charge 0.50% to 1.50% or higher. Over time, lower fees mean more of your money stays invested and grows.
You may also pay a commission when you buy or sell ETF shares, depending on your brokerage. Many brokerages now offer commission-free ETF trading, so check your brokerage's fee schedule before you open an account.
Why people buy ETFs instead of individual stocks
Diversification is the main reason. When you own one ETF, you own pieces of dozens or hundreds of companies. If one company performs poorly, it is a small part of your total investment. If you owned just five individual stocks and one crashed, the damage would be much larger.
ETFs also require less research. To own individual stocks, you need to study each company's finances, management, and prospects. With an ETF, you can rely on the index or the fund manager's strategy. This makes ETFs a practical choice for people who do not have time to research individual companies.
Simplicity is another factor. Rebalancing a portfolio of individual stocks takes work — you have to sell winners and buy losers to keep your allocation on track. Many ETFs rebalance automatically, so you do not have to manage it yourself.
Types of ETFs you will encounter
Stock ETFs hold shares of companies. They may track a broad index like the S&P 500, or focus on a specific sector (technology, healthcare, energy) or a specific type of company (large-cap, small-cap, dividend-paying).
Bond ETFs hold bonds issued by governments or corporations. They may focus on short-term bonds, long-term bonds, investment-grade bonds, or high-yield bonds, depending on the fund's strategy.
Balanced ETFs hold both stocks and bonds in a set mix, such as 60% stocks and 40% bonds. This simplifies portfolio construction because one ETF gives you both growth and stability.
Specialty ETFs track specific themes or strategies: commodities, real estate, currencies, or even companies that meet environmental or social criteria. These are less common and often charge higher fees.
How ETF prices work
An ETF's price changes throughout the trading day based on supply and demand. If many people want to buy the ETF, its price rises. If many people want to sell, its price falls. The price reflects what investors are willing to pay at that moment.
The ETF's price is separate from its net asset value (NAV), which is the total value of all the investments inside the fund divided by the number of shares outstanding. In theory, the ETF's trading price should match its NAV, but in practice they can differ slightly because of supply and demand. This gap is usually tiny and closes quickly.
You can buy and sell ETF shares at any time during market hours. If you place an order before the market closes, you get the price at the moment your order executes, not a set price at the end of the day like you would with a mutual fund.
ETFs versus mutual funds and individual stocks
| Feature | ETF | Mutual Fund | Individual Stock |
|---|---|---|---|
| How you trade it | Like a stock, during market hours | Once per day after market close | Anytime during market hours |
| Price updates | Minute by minute | Once per day | Minute by minute |
| Diversification | when ready (one purchase = many holdings) | when ready (one purchase = many holdings) | Requires buying many stocks |
| Typical fees | 0.03% to 1.50% per year | 0.50% to 2.00% per year | Commission per trade (often free now) |
| Tax efficiency | Generally high | Generally lower | Depends on your trading |
Frequently Asked Questions
Can I lose money in an ETF?
Yes. If the stocks or bonds inside the ETF fall in value, the ETF's price falls too. You can lose some or all of your investment. However, because an ETF holds many investments, a single bad performer does not wipe out your entire position the way a single bad stock could.
Do I get dividends from an ETF?
Many ETFs do pay dividends if the stocks or bonds inside them pay dividends. The ETF collects those dividends and either pays them to you or reinvests them automatically, depending on the ETF and your brokerage settings. Check your ETF's prospectus to see its dividend policy.
What is the difference between an ETF and an index fund?
An index fund is a type of fund (mutual fund or ETF) that tracks an index. Not all ETFs are index funds — some are actively managed. But many popular ETFs are index funds. The key difference is how you trade it: an index mutual fund trades once per day, while an index ETF trades throughout the day like a stock.
How much money do I need to start buying ETFs?
You need enough to buy at least one share. ETF prices vary widely — some trade for under $50 per share, others for several hundred dollars. Your brokerage may also have a minimum account balance, which varies by firm. Check your brokerage's requirements before you open an account.
Are ETFs safe?
ETFs are regulated investment products, so they follow strict rules about what they can hold and how they must report their holdings. However, the safety of your money depends on what the ETF holds. A bond ETF is generally less risky than a stock ETF, but both can lose value. Diversification within an ETF reduces risk compared to owning a single stock.