ETF stands for Exchange-Traded Fund

An ETF is a fund that holds a collection of investments — usually stocks, bonds, or a mix of both — and trades on a stock exchange the same way individual company shares do. You buy and sell ETF shares through a brokerage account at market prices that change throughout the trading day, unlike mutual funds which are priced once per day after markets close.

The word "exchange-traded" means the fund itself is bought and sold on exchanges like the New York Stock Exchange or NASDAQ. The word "fund" means it pools money from many investors to buy a basket of securities. When you own one share of an ETF, you own a small piece of everything inside it.

Key Takeaways

  • ETF stands for Exchange-Traded Fund, a collection of investments that trades like a stock throughout the day.
  • ETFs hold multiple securities — stocks, bonds, or both — so one purchase gives you exposure to many companies or assets at once.
  • You can buy and sell ETF shares any time the market is open, and the price changes minute by minute based on supply and demand.
  • ETFs typically charge lower fees than actively managed mutual funds because most track an index rather than paying a manager to pick investments.

How an ETF differs from a mutual fund

Both ETFs and mutual funds hold baskets 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 daily price. An ETF trades continuously during market hours, so its price moves up and down like a stock.

Mutual funds are often actively managed, meaning a fund manager picks which stocks or bonds to buy and sell. Most ETFs track an index — a preset list of securities like the S&P 500 or the Nasdaq-100 — so there is no manager making daily decisions. This passive approach usually means lower fees. You also pay taxes differently: ETFs are generally more tax-efficient because of how they handle trades internally.

What goes inside an ETF

An ETF can hold stocks, bonds, commodities, or a combination. A stock ETF might track the 500 largest U.S. companies, or it might focus on a single industry like technology or healthcare. A bond ETF might hold government bonds, corporate bonds, or both. Some ETFs mix stocks and bonds in a single fund.

The contents depend on what the ETF is designed to track. An index-tracking ETF holds the same securities as its index in roughly the same proportions. A sector ETF holds companies in one industry. A themed ETF might hold companies involved in renewable energy, artificial intelligence, or dividend-paying stocks. You can see exactly what an ETF holds by looking at its holdings list, which fund companies publish online.

Why the price of an ETF changes throughout the day

Because ETFs trade on exchanges like stocks, their prices move constantly based on what buyers and sellers are willing to pay. If many people want to buy an ETF share at the same moment, the price goes up. If many people want to sell, the price goes down. This happens in real time during market hours.

The price also reflects changes in the value of the securities inside the fund. If the stocks an ETF holds rise in value, the ETF share price typically rises too. If those stocks fall, so does the ETF price. The relationship is not always exact because of supply and demand on the exchange, but it tracks closely.

Costs and fees associated with ETFs

ETFs charge an annual fee called an expense ratio, expressed as a percentage of your investment. A fund with a 0.05% expense ratio costs $5 per year for every $10,000 you invest. Expense ratios vary widely: index-tracking ETFs often charge 0.03% to 0.20%, while specialized or actively managed ETFs may charge 0.50% or higher.

You also pay a bid-ask spread when you buy or sell — the difference between what buyers are willing to pay and what sellers are asking. This spread is usually small for popular ETFs but can be wider for less-traded funds. Some brokerages charge a commission per trade, though many now offer commission-free ETF trading. Check your brokerage's fee schedule to understand what you will pay.

Common types of ETFs and what they track

Index ETFs track broad market indexes like the S&P 500, total stock market, or international stock indexes. Sector ETFs focus on one industry — technology, healthcare, energy, finance. Bond ETFs hold government or corporate debt. Commodity ETFs track the price of oil, gold, or agricultural products. Factor ETFs focus on stocks with specific traits like high dividends or low volatility.

Themed ETFs have grown in recent years and track companies involved in specific trends — electric vehicles, cloud computing, cybersecurity, or renewable energy. International ETFs hold stocks or bonds from outside the United States. Target-date ETFs automatically shift from stocks to bonds as you approach retirement. Each type serves a different investment goal or strategy.

How to buy and sell ETF shares

You need a brokerage account to buy ETFs. Open an account with a broker — online brokers like Fidelity, Charles Schwab, E-Trade, or Vanguard are common choices — and link a bank account. Once your account is funded, you can search for an ETF by its ticker symbol (a short code like SPY or VOO) and place a buy order.

Your order executes during market hours at the current market price. You can place a market order, which buys at the best available price right now, or a limit order, which buys only if the price drops to a level you specify. Selling works the same way: search for the ETF you own, enter the number of shares, and choose market or limit order. The cash from the sale appears in your account within a few days.

Frequently Asked Questions

Can I lose money investing in an ETF?

Yes. ETF share prices rise and fall based on the value of the securities inside. If the stocks or bonds an ETF holds decline in value, your investment declines too. The only exception is if an ETF holds cash or cash equivalents, which have minimal price movement but also minimal growth potential.

Do I receive dividends from an ETF?

Many ETFs do pay dividends if the stocks or bonds inside them pay dividends or interest. The fund collects these payments and distributes them to shareholders, usually quarterly or annually. You can choose to receive the cash or reinvest it automatically into more ETF shares.

What is the difference between an ETF and a stock?

A stock is ownership in one company. An ETF is ownership in a fund that holds many securities. Buying one ETF share gives you exposure to dozens or hundreds of companies at once, which spreads risk. A single stock concentrates risk in one company.

Are ETFs safer than individual stocks?

ETFs are generally considered less risky because they hold many securities, so poor performance by one company does not sink your entire investment. However, all investments carry risk. An ETF that holds only technology stocks is riskier than one that holds a mix of stocks and bonds.

How much money do I need to start buying ETFs?

You need enough to buy at least one share. ETF prices range from under $20 to over $400 per share depending on the fund. Some brokerages also offer fractional shares, meaning you can buy a portion of an ETF share for as little as $1.