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

ETF stands for exchange-traded fund. Instead of buying one company's stock, you buy a share of a basket that might hold 50, 500, or even thousands of stocks. The fund manager picks which holdings go in the basket — often following a rule like "all large US companies" or "all tech stocks" — and you own a slice of all of them at once.

The key difference from owning individual stocks is that you get instant diversification. If one company in the fund drops 20%, it might barely move the fund's price because the other holdings balance it out. You also pay one fee to the fund company instead of paying a commission each time you buy a single stock.

ETFs trade during market hours just like regular stocks. You can buy and sell them through any brokerage account, and the price changes throughout the day based on what buyers and sellers are willing to pay.

Key Takeaways

  • An ETF bundles many stocks or bonds into one investment you can buy as a single share on a stock exchange.
  • You own a small piece of every holding in the fund, so losses in one company are cushioned by gains in others.
  • ETFs charge an annual fee (usually between 0.03% and 0.5% of your investment) rather than a per-trade commission.
  • The fund's price moves throughout the trading day, and you can sell whenever the market is open, unlike mutual funds that price once daily.

How an ETF differs from owning individual stocks

When you buy a single stock, you own a piece of one company. If that company struggles, your investment drops. With an ETF, you own a piece of many companies at once, so one company's bad quarter has less impact on your total return.

Individual stocks also require you to research each company, watch earnings reports, and decide when to buy and sell. An ETF does the research and rebalancing for you — the fund manager or an automated system keeps the holdings aligned with the fund's stated goal.

Trading costs also differ. Buying individual stocks through most brokerages is now commission-free, but if you want to own 20 different stocks, you make 20 separate trades. An ETF lets you own exposure to hundreds of companies with a single purchase.

How an ETF differs from a mutual fund

Both ETFs and mutual funds hold baskets of stocks or bonds, but they trade differently. A mutual fund prices once per day after the market closes, and you buy or sell at that day's closing price. An ETF trades throughout the day like a stock, so the price changes minute by minute.

ETFs are also usually cheaper. The average ETF charges 0.1% to 0.3% per year, while mutual funds often charge 0.5% to 1% or more. Over decades, that difference compounds significantly.

Mutual funds are still useful if you want automatic monthly investments or if you prefer not to watch prices during the trading day. But for most investors building a long-term portfolio, ETFs offer lower costs and more flexibility.

Common types of ETFs and what they track

An index ETF tracks a specific group of stocks, like the S&P 500 (the 500 largest US companies) or the Nasdaq-100 (large tech and growth companies). You own whatever the index owns, in the same proportions. These are the simplest and cheapest ETFs.

A sector ETF focuses on one industry — technology, healthcare, energy, or finance. These let you bet on a particular part of the economy without picking individual companies.

A bond ETF holds government or corporate bonds instead of stocks. These are useful if you want steady income or want to balance stock risk with something more stable.

Other ETFs track international stocks, emerging markets, commodities, or combinations of stocks and bonds. Some use complex strategies like leverage (borrowing to amplify returns) or inverse positions (betting that prices will fall). These advanced types carry higher risk and higher fees.

How much it costs to own an ETF

The main cost is the expense ratio — the annual fee the fund company charges to manage the fund and cover operating costs. This is expressed as a percentage of your investment. A fund with a 0.1% expense ratio costs $10 per year for every $10,000 you invest.

You also pay the bid-ask spread when you buy or sell — the tiny difference between what buyers will pay and what sellers will accept. For popular ETFs, this spread is usually just a few cents per share. For less-traded ETFs, it can be wider.

If you buy through a brokerage, there is no commission on most ETFs today. Some brokerages offer commission-free trading on their own ETFs or on a curated list of popular funds.

How to buy an ETF through a brokerage account

You need a brokerage account first — this is an account with a company like Fidelity, Schwab, Vanguard, or a discount broker. You fund the account with cash, then search for the ETF by its ticker symbol (a short code like SPY or VOO).

Once you find the ETF, you enter how many shares you want to buy and place the order. During market hours (9:30 a.m. to 4 p.m. Eastern time on weekdays), the order fills at the current market price. After hours, your order waits until the market opens the next day.

The ETF shares then appear in your account, and you own them until you decide to sell. You can hold them for decades, sell them tomorrow, or sell part of your position and keep the rest.

Why investors use ETFs instead of picking individual stocks

Picking individual stocks requires time, research, and emotional discipline. Most people who try to beat the market by choosing their own stocks underperform a simple index ETF over 10 or 20 years. An ETF removes the guesswork and the temptation to buy high and sell low based on fear or greed.

ETFs also make it easier to build a diversified portfolio with less money. Instead of needing thousands of dollars to own 20 different stocks, you can own exposure to hundreds of companies with a few hundred dollars in one or two ETFs.

For beginners, a single broad index ETF like one tracking the S&P 500 or total US stock market is often enough. As you learn more, you can add sector or international ETFs to fine-tune your portfolio.

Frequently Asked Questions

Do I pay taxes when I buy or sell an ETF?

You do not pay taxes on the purchase itself. You pay capital gains tax only when you sell for a profit. If you hold the ETF for more than one year before selling, you pay long-term capital gains tax, which is usually lower than short-term rates. ETFs are also tax-efficient because the fund manager rarely sells holdings, so you avoid the tax bill that comes with frequent trading.

Can an ETF go to zero?

A broad index ETF tracking hundreds of companies is extremely unlikely to go to zero because it would require nearly every company in the index to fail. A sector or single-country ETF carries more risk. Even then, the fund would have to be liquidated by the company managing it, which is rare. You would get whatever the remaining holdings are worth.

What is the difference between an ETF and a stock?

A stock is ownership in one company. An ETF is ownership in a basket of many stocks or bonds. When you buy a stock, you win or lose based on that one company's performance. When you buy an ETF, your return depends on the average performance of all the holdings combined.

Should I buy ETFs or individual stocks?

Most investors build wealth faster and with less stress using ETFs. Individual stocks require research, timing, and emotional control. If you enjoy researching companies and have time to monitor them, individual stocks can work. For most people, a mix of low-cost index ETFs is simpler and produces better results over time.

Can I lose money in an ETF?

Yes. If the stocks or bonds in the ETF decline in value, your investment declines too. However, the diversification in an ETF means you are less likely to lose everything compared to owning a single stock. Over long periods (10+ years), broad market ETFs have historically recovered from downturns and produced positive returns.