An ETF is a fund that holds a basket of investments and trades on a stock exchange like a single stock

An exchange-traded fund (ETF) is a collection of investments — usually stocks, bonds, or 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 a company. The price moves throughout the trading day based on what other investors are willing to pay, unlike mutual funds, which price once per day after markets close.

The fund itself is managed by a company that decides what investments go inside it. That company collects a small annual fee (called an expense ratio) from the fund's assets to cover costs. You own a proportional slice of everything in the fund — if the fund holds 500 stocks, you own a tiny piece of all 500.

Key Takeaways

  • An ETF holds multiple investments in one package and trades throughout the day like a stock, so its price changes constantly.
  • You pay an annual fee (expense ratio) to the fund company, which typically ranges from 0.03% to 1% of your investment per year depending on the fund type.
  • ETFs can track a specific index (like the S&P 500), focus on a particular sector (like technology or healthcare), or hold a mix of bonds and stocks.
  • You buy and sell ETF shares through a brokerage account, and you can hold them in retirement accounts like IRAs or regular taxable accounts.

How an ETF differs from a mutual fund or individual stocks

When you buy an individual stock, you own a piece of one company. When you buy a mutual fund, you own pieces of many investments, but the price is set once daily after markets close and you cannot trade it during the day. An ETF sits in the middle: it holds many investments like a mutual fund, but you can buy and sell shares at any time while markets are open, and the price changes minute to minute.

Mutual funds often have higher expense ratios than ETFs — sometimes 0.5% to 2% or more per year. ETFs tend to be cheaper, especially index ETFs that simply track a published list of stocks or bonds rather than paying a manager to pick investments. A mutual fund also may require a minimum investment (sometimes $1,000 or more), while an ETF costs whatever one share costs that day.

What types of investments an ETF can hold

An ETF can hold stocks, bonds, commodities, or a mix. Some ETFs track a broad market index — the S&P 500 ETF, for example, holds shares in 500 large U.S. companies in the same proportions as the index itself. Others focus narrowly: a technology sector ETF holds only tech companies, or a dividend ETF holds stocks known for paying regular cash to shareholders.

Bond ETFs hold corporate bonds, government bonds, or both. Some ETFs mix stocks and bonds in a set ratio, like a 60/40 fund that holds 60% stocks and 40% bonds. International ETFs hold stocks or bonds from outside the United States. There are also specialty ETFs focused on real estate investment trusts (REITs), emerging markets, or specific themes like renewable energy or artificial intelligence.

How ETF expense ratios work

The expense ratio is an annual percentage fee deducted from the fund's assets. If an ETF has a 0.1% expense ratio and you hold $10,000 in it, you pay roughly $10 per year. The fee is taken automatically — you do not write a check. It reduces the fund's value, so you see the effect in your account balance over time.

Expense ratios vary widely. A broad index ETF tracking the S&P 500 might charge 0.03% to 0.1% per year. A specialty ETF focused on a narrow sector or strategy might charge 0.5% to 1% or higher. Over decades, even small differences add up: a 0.1% fee versus a 0.5% fee can mean thousands of dollars in difference on a large investment held for 20 or 30 years.

Where you buy and hold ETFs

You purchase ETF shares through a brokerage account — an online platform like Fidelity, Vanguard, Charles Schwab, or many others. You fund the account with cash, then place an order to buy shares of the ETF you want, just as you would buy a stock. The shares settle in your account (usually within two business days), and you own them until you sell.

You can hold ETFs in a regular taxable brokerage account, or inside retirement accounts like a traditional IRA, Roth IRA, or 401(k) if your plan allows it. Some employers offer ETFs as investment choices within their 401(k) plans. You can also hold ETFs in a custodial account for a minor or in a trust, depending on the brokerage.

Tax treatment of ETFs

When you sell an ETF share for more than you paid for it, you owe capital gains tax on the profit. If you held it for more than one year, it is taxed as a long-term capital gain, which usually has a lower tax rate than short-term gains (held one year or less). Dividends paid by stocks or bonds inside the ETF are also taxable in the year you receive them, unless the ETF is held in a tax-sheltered retirement account.

ETFs are generally more tax-efficient than mutual funds because of how they are structured and traded. Mutual funds sometimes distribute large capital gains to shareholders, which creates a tax bill even if you did not sell. ETFs rarely do this, which is one reason they are popular in taxable accounts.

Risks and things to consider before investing

An ETF's value rises and falls with the value of the investments it holds. If you own a stock ETF and the stock market drops 20%, your ETF drops roughly 20% too. You could lose money, especially if you sell during a downturn. Bond ETFs are generally less volatile but still carry risk — interest rate changes affect bond prices, and if a bond issuer defaults, the fund loses value.

Some specialty ETFs use leverage (borrowed money) or complex strategies to amplify returns or bet against the market. These are riskier and intended for experienced investors. Before buying any ETF, read the fund's prospectus or fact sheet to understand what it holds, what it costs, and what risks it carries. Past performance does not predict future results.

Frequently Asked Questions

Can I lose money in an ETF?

Yes. If the investments inside the ETF fall in value, your shares fall too. You could sell at a loss if you need the money when the market is down. However, if you hold the ETF long-term and the underlying investments recover, you may recoup losses.

Do I have to pay taxes on ETF dividends?

Yes, unless the ETF is held in a tax-sheltered account like an IRA or 401(k). Dividends from stocks and interest from bonds inside the ETF are taxable in the year you receive them. Long-term capital gains from selling shares at a profit also trigger taxes.

What is the difference between an active and passive ETF?

A passive ETF tracks an index automatically — it holds the same stocks or bonds as the index in the same proportions. An active ETF has a manager who picks investments to try to beat the index. Active ETFs usually charge higher fees because of the management cost.

Can I buy an ETF with a small amount of money?

Yes. You can buy one share of an ETF for whatever that share costs that day — sometimes $20, sometimes $200. There is no minimum investment like many mutual funds require. You can also set up automatic purchases of fractional shares through many brokerages.

Are ETFs safer than individual stocks?

ETFs spread your money across many investments, so a single company's failure does not wipe out your investment. This diversification reduces risk compared to owning one or two stocks. However, ETFs still carry market risk — if the entire market or sector falls, your ETF falls too.