What an ETF is and how it differs from a stock

An ETF (exchange-traded fund) is a basket of investments bundled together and sold as a single security. When you buy one share of an ETF, you own a small piece of everything inside that basket — which might be stocks, bonds, commodities, or a mix. The key difference from buying individual stocks: one ETF purchase gives you instant ownership in dozens or hundreds of companies at once.

A stock is ownership in a single company. An ETF is ownership in a collection of investments that a fund manager has grouped together around a theme or strategy. If you buy Apple stock, you own Apple. If you buy an S&P 500 ETF, you own a slice of 500 large U.S. companies.

ETFs trade on stock exchanges during market hours, just like individual stocks do. You can buy and sell them through a brokerage account at any time the market is open. The price changes throughout the day based on what other investors are willing to pay.

Key Takeaways

  • An ETF holds many investments inside it, so one purchase spreads your money across dozens or hundreds of securities instead of putting it all in one company.
  • ETFs trade during market hours like stocks, but their price reflects the combined value of everything they hold, not the price of a single company.
  • Most ETFs are passive, meaning they track an index like the S&P 500 and rarely change their holdings; some are active, meaning a manager picks and changes investments to try to beat the market.
  • ETF fees are typically lower than mutual funds because passive ETFs require less management, and you pay them as a percentage of your investment each year.
  • You can hold an ETF in a regular taxable brokerage account or inside a retirement account like an IRA or 401(k).

Passive versus active ETFs

Most ETFs are passive, which means they track a published index — a predetermined list of investments. The S&P 500 index, for example, contains 500 large U.S. companies. An S&P 500 ETF holds all 500 (or a representative sample) and changes its holdings only when the index itself changes. The fund manager's job is to keep the holdings aligned with the index, not to pick winners.

Some ETFs are active, meaning a fund manager makes decisions about which investments to buy and sell, trying to outperform a benchmark. Active ETFs require more work and more trading, so they typically charge higher fees. Many investors choose passive ETFs because the fees are lower and research shows that most active managers do not consistently beat the market over long periods.

You will see both types available through any brokerage. The fund name and description usually make clear whether it is tracking an index or being actively managed.

How ETF fees work

ETFs charge an annual fee called an expense ratio, expressed as a percentage of your investment. If an ETF has a 0.05% expense ratio and you hold $10,000 in it, you pay $5 per year. That fee is deducted automatically from the fund's value; you do not write a check.

Passive ETFs typically charge between 0.03% and 0.20% per year because they simply track an index. Active ETFs often charge 0.50% to 1.50% or higher because a manager is making decisions. Over decades, even small differences in fees compound — a 0.05% fee versus a 0.50% fee can mean thousands of dollars in difference on a $100,000 investment.

You may also pay a commission when you buy or sell an ETF through your brokerage, though many brokerages now offer commission-free trading on ETFs. Check your brokerage's fee schedule before you open an account.

What types of investments ETFs can hold

ETFs can hold stocks, bonds, commodities, real estate investment trusts (REITs), or combinations of these. A stock ETF might focus on U.S. large companies, international stocks, or a specific sector like technology or healthcare. A bond ETF might hold government bonds, corporate bonds, or high-yield bonds. Some ETFs hold gold or oil futures. Others hold real estate properties indirectly through REITs.

The fund's prospectus and name tell you what is inside. An ETF called "Vanguard Total Stock Market ETF" holds a broad range of U.S. stocks. An ETF called "iShares MSCI Emerging Markets ETF" holds stocks from developing countries. An ETF called "Vanguard Total Bond Market ETF" holds a mix of government and corporate bonds.

This variety means you can build a diversified portfolio with just a handful of ETF purchases, rather than researching and buying dozens of individual securities.

How to buy and sell an ETF

You need a brokerage account to buy ETFs. Open an account with a brokerage firm (such as Fidelity, Charles Schwab, Vanguard, or others), deposit money, and then search for the ETF you want by its ticker symbol — a short code like SPY or VOO. Place an order to buy a specific number of shares, just as you would for a stock.

Your order executes during market hours (9:30 a.m. to 4 p.m. Eastern time on weekdays when the market is open). You own the shares immediately and can see them in your account. To sell, you place a sell order the same way.

You can hold ETFs in a regular taxable brokerage account, or inside a tax-advantaged retirement account like a traditional IRA, Roth IRA, or 401(k). The account type affects how and when you pay taxes on gains, but the mechanics of buying and selling are the same.

Why investors use ETFs instead of individual stocks

Diversification is the main reason. Buying 10 individual stocks concentrates your risk in 10 companies. Buying one broad ETF spreads your money across hundreds. If one company performs poorly, it has a small impact on your overall portfolio.

Lower fees are another reason. Passive ETFs charge less than actively managed mutual funds or paying an advisor to pick stocks for you. Over 20 or 30 years, lower fees mean more of your money stays invested and compounds.

Simplicity is a third reason. You do not need to research individual companies or time your purchases. You can build a complete portfolio with three or four ETFs — one for U.S. stocks, one for international stocks, one for bonds, and possibly one for real estate or commodities.

Tax considerations with ETFs

ETFs are generally more tax-efficient than mutual funds because they trade less frequently and their structure allows them to distribute fewer capital gains to shareholders. When you sell an ETF at a profit, you owe capital gains tax on that 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.

If you hold ETFs in a retirement account like a 401(k) or Roth IRA, you do not pay tax on gains until you withdraw the money (or never, in the case of a Roth). This is one reason retirement accounts are powerful tools for long-term investing.

Keep records of what you paid for each ETF and when you sold it, because you will need that information to calculate gains and losses when you file taxes.

Frequently Asked Questions

Can I lose money in an ETF?

Yes. If the investments inside the ETF decline in value, so does the ETF's share price. You can sell at a loss and realize that loss, or hold and hope the value recovers. Diversification reduces risk but does not eliminate it.

Do I get dividends from an ETF?

Many ETFs do pay dividends if the companies or bonds they hold pay dividends. The ETF collects those payments and distributes them to shareholders, usually quarterly or annually. You can take the dividend as cash or reinvest it to buy more shares.

What is the difference between an ETF and a mutual fund?

Both hold baskets of investments, but ETFs trade like stocks during market hours and typically have lower fees. Mutual funds are priced once per day after the market closes and often charge higher fees. ETFs are also more tax-efficient for most investors.

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 $200 or more. Many brokerages allow fractional share purchases, so you can invest smaller amounts.

Should I buy individual ETFs or a fund of funds?

A fund of funds holds other ETFs inside it, adding an extra layer of fees. Most investors build their own portfolio by buying two to four individual ETFs that cover different asset classes — stocks, bonds, and possibly real estate. This approach is simpler and cheaper.