An ETF is a fund that holds many stocks or bonds and trades like a single stock on an exchange

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 unit. You buy and sell ETF shares through a brokerage account the same way you would buy shares of Apple or Microsoft. The price changes throughout the trading day based on what other investors are willing to pay.

The main difference between an ETF and owning individual stocks is diversification built in. When you buy one ETF share, you own a tiny piece of dozens, hundreds, or sometimes thousands of different companies or bonds. If one holding drops in value, the others may hold steady or rise, which reduces your overall risk.

ETFs are managed by investment companies that decide which securities go into the fund and rebalance the holdings periodically. You do not have to pick individual stocks or decide when to buy and sell them — the fund manager does that work.

Key Takeaways

  • An ETF is a collection of stocks, bonds, or other securities packaged as a single investment you can buy and sell like a stock.
  • ETF prices change throughout the trading day, unlike mutual funds which price once per day after the market closes.
  • ETFs typically charge lower fees than actively managed mutual funds because many track an index rather than relying on a manager to pick winners.
  • You need a brokerage account to buy ETFs, and you can hold them in a regular taxable account or a retirement account like an IRA.

How ETFs differ from mutual funds

Both ETFs and mutual funds hold a collection of securities, but they work differently in practice. A mutual fund is priced once per day after the market closes, and you buy or sell at that single price. An ETF trades continuously during market hours, so its price changes minute by minute based on supply and demand.

Mutual funds are often actively managed, meaning a fund manager researches companies and decides which ones to buy and sell to try to beat the market. ETFs are frequently index funds, meaning they straightforward hold all the stocks in a particular index — like the S&P 500 or the Nasdaq 100 — in the same proportions. Index ETFs have lower fees because no manager is making individual stock picks.

Tax treatment also differs. When a mutual fund manager sells a security at a profit, that gain is passed to all fund shareholders and may trigger a tax bill. ETF structures allow them to distribute gains more efficiently, which often means lower taxes for you in a regular account.

Types of ETFs and what they track

ETFs come in many varieties depending on what they hold. A stock ETF holds shares of companies and might track a broad index like the S&P 500, a specific sector like technology or healthcare, or a particular country or region. A bond ETF holds debt securities and might focus on government bonds, corporate bonds, or bonds from a particular maturity range.

Some ETFs blend stocks and bonds in a set mix — for example, a fund might always hold 60 percent stocks and 40 percent bonds. Others track commodities like gold or oil, or real estate investment trusts (REITs). There are also specialty ETFs that focus on dividend-paying stocks, small companies, or companies with strong environmental or social practices.

The fund name usually tells you what it holds. An ETF called "Vanguard S&P 500 ETF" tracks the S&P 500 index. One called "iShares MSCI Emerging Markets ETF" holds stocks from developing countries. Reading the fund's prospectus or fact sheet will tell you exactly which securities are inside and how the fund is managed.

How to buy and sell ETF shares

You buy ETFs through a brokerage account — the same type of account you would use to buy individual stocks. Open an account with a broker like Fidelity, Charles Schwab, E-Trade, or a robo-advisor, then search for the ETF by its ticker symbol (a short code like SPY or VOO). Place an order to buy a certain number of shares, just as you would for any stock.

The order executes during market hours (9:30 a.m. to 4 p.m. Eastern time on weekdays when the market is open). You will see the shares appear in your account and the cash deducted from your balance. You can sell those shares anytime the market is open by placing a sell order.

Most brokerages charge no commission to buy or sell ETFs, though some may charge a small fee if you trade during extended hours (before 9:30 a.m. or after 4 p.m.). The ETF itself charges an annual fee called an expense ratio, which is deducted from the fund's assets and reduces your returns slightly each year.

Expense ratios and the cost of owning an ETF

Every ETF charges an annual fee called an expense ratio, expressed as a percentage of your investment. A fund with a 0.05 percent expense ratio costs you $5 per year for every $10,000 you own. A fund with a 1 percent expense ratio costs $100 per year on the same $10,000.

Index ETFs typically have very low expense ratios — often between 0.03 and 0.20 percent — because they straightforward hold the same securities as an index and require little active management. Actively managed ETFs, where a manager picks securities, usually charge higher fees, often between 0.50 and 1.50 percent.

The expense ratio is the main ongoing cost of owning an ETF. You do not pay it as a separate bill; it is deducted automatically from the fund's value each day. Over time, even small differences in expense ratios add up significantly, which is why many investors prefer low-cost index ETFs.

ETFs in retirement and regular accounts

You can hold ETFs in any type of investment account. In a regular taxable brokerage account, you pay capital gains tax when you sell an ETF at a profit, and you may owe tax on dividends the ETF distributes. In a retirement account like a traditional IRA or Roth IRA, ETFs grow tax-deferred or tax-free depending on the account type.

Many people use ETFs as the core holdings in a retirement portfolio because the low fees and tax efficiency mean more of your money stays invested and compounds over time. You can also hold ETFs in a 401(k) if your employer's plan offers them, though many plans limit you to a smaller selection of funds.

The account type does not change how the ETF works — it still trades during market hours and holds the same securities. The difference is only in how the gains and income are taxed.

Common mistakes when buying ETFs

One frequent mistake is buying an ETF without understanding what it holds. The fund name can be misleading or vague. Before you buy, read the fund's fact sheet or prospectus to confirm it matches your investment goals. A fund labeled "growth" might hold very different stocks than one labeled "value," even though both are stock funds.

Another mistake is trading ETFs too frequently. Because ETFs trade like stocks, it is straightforward to buy and sell them on impulse. Frequent trading can trigger capital gains taxes and eat into returns through bid-ask spreads (the small difference between the price you pay to buy and the price you receive to sell). Most investors benefit from buying an ETF and holding it for years.

A third mistake is overlooking expense ratios. A difference of 0.50 percent per year does not sound like much, but over 20 years it can cost you tens of thousands of dollars in foregone growth. Always compare the expense ratios of similar ETFs before you decide which one to buy.

Frequently Asked Questions

Can I lose money in an ETF?

Yes. If the stocks or bonds the ETF holds drop in value, your ETF shares will drop too. However, because an ETF holds many securities, the risk is spread across them. A single bad stock will not wipe out your investment the way it could if you owned that stock alone.

Do I get dividends from an ETF?

Many ETFs distribute dividends to shareholders. When the companies in the fund pay dividends, the ETF collects them and passes them to you. You can choose to reinvest the dividends back into the fund or take them as cash. In a taxable account, you owe tax on dividends whether you reinvest them or not.

What is the difference between an ETF and an index fund?

An index fund is a type of fund that tracks an index. Most index funds are mutual funds that price once per day, but some are ETFs that trade throughout the day. The term "index fund" describes the strategy; "ETF" describes the structure. An index ETF combines both — it tracks an index and trades like a stock.

How much money do I need to start buying ETFs?

You can buy a single share of most ETFs, so the amount you need depends on the ETF's share price. Some ETFs trade for $20 per share, others for $100 or more. You also need to open a brokerage account, which usually requires a small minimum deposit, though many brokers have lowered or eliminated this requirement.

Are ETFs safer than individual stocks?

ETFs are generally considered less risky than individual stocks because they hold many securities instead of one. If one company fails, it is a small part of your investment. However, ETFs are not risk-free — the entire market can decline, and your ETF will decline with it. The level of risk depends on what the ETF holds.