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 — packaged into one security that you can buy and sell during market hours, just like you would buy shares of Apple or Microsoft. You own a piece of everything in that basket, not individual companies.

The key difference from a mutual fund is timing and price. A mutual fund's price is set once per day after the market closes. An ETF's price changes throughout the trading day as people buy and sell it. This means you can trade an ETF at 10 a.m. or 3 p.m., and you'll get the price at that exact moment — not a price calculated hours later.

ETFs are built around a strategy. Some track a broad index like the S&P 500 (the 500 largest U.S. companies). Others focus on a sector — technology, healthcare, energy — or a specific type of bond. Some are designed to pay dividends monthly. Others bet that a market will fall. The fund manager decides what goes in the basket and rebalances it to match the strategy.

Key Takeaways

  • An ETF holds many investments in one package and trades throughout the day at a price that changes minute to minute, unlike mutual funds which price once daily.
  • You own a small piece of every holding in the ETF, so you get instant diversification without buying 100 individual stocks.
  • ETF fees (called expense ratios) are usually lower than mutual fund fees, often under 0.20% per year for index-tracking ETFs.
  • You can buy an ETF through any brokerage account the same way you buy a stock, and you can sell it anytime the market is open.
  • ETFs can track indexes, sectors, themes, bonds, commodities, or other strategies — the structure is the same, but what's inside varies widely.

How you own a piece of an ETF

When you buy one share of an ETF, you own a fractional stake in every holding inside it. If an ETF holds 500 stocks, one share of that ETF gives you exposure to all 500 — you don't have to buy 500 individual shares. This is called diversification, and it reduces the risk that any single company's bad news will hurt your portfolio much.

The fund manager or an automated system maintains the basket. If the ETF is supposed to track the S&P 500, the manager buys shares of all 500 companies in the right proportions. If a company leaves the index, the manager sells it and buys the replacement. You don't have to do any of this work — you just own the ETF.

You receive dividends and interest just as you would if you owned the stocks or bonds directly. If the companies in the ETF pay dividends, the ETF collects them and passes them to you. Some ETFs pay these out monthly, quarterly, or annually. Others reinvest them automatically back into the fund.

The cost of owning an ETF

Every ETF charges a fee called an expense ratio, expressed as a percentage of what you own. A 0.10% expense ratio means you pay $10 per year for every $10,000 invested. This fee is deducted automatically from the fund's value — you don't write a check.

Index-tracking ETFs (ones that simply mirror a market index) typically charge between 0.03% and 0.20% per year. Actively managed ETFs, where a manager picks individual stocks or bonds rather than following an index, often charge 0.50% to 1.00% or more. Specialty ETFs — those tracking a narrow sector or using complex strategies — can charge even higher fees.

Beyond the expense ratio, you may pay a commission when you buy or sell. Many brokerages now offer commission-free ETF trading, but some still charge $5 to $10 per trade. Check your brokerage's fee schedule before you open an account. You may also owe capital gains tax if you sell an ETF for more than you paid, though ETFs are generally more tax-efficient than mutual funds.

Types of ETFs and what they track

An index ETF tracks a market benchmark. The Vanguard S&P 500 ETF (ticker VOO) holds all 500 companies in the S&P 500 in the same proportions as the index itself. The Schwab U.S. Total Stock Market ETF (SWTSX) holds thousands of U.S. stocks. These are the simplest and cheapest ETFs.

A sector ETF focuses on one industry. The Technology Select Sector SPDR (XLK) holds large tech companies. The Financials Select Sector SPDR (XLF) holds banks and insurance companies. Sector ETFs let you bet on an industry without picking individual stocks, but they carry more risk than a broad market ETF because they're less diversified.

A bond ETF holds debt securities instead of stocks. Some track government bonds, others corporate bonds, others high-yield (riskier) bonds. A bond ETF pays interest rather than dividends and tends to move less dramatically than stock ETFs. International ETFs hold stocks or bonds from outside the U.S. Dividend ETFs focus on companies that pay high dividends. Inverse ETFs are designed to gain value when the market falls — they're used by experienced investors to hedge against losses.

How to buy and sell an ETF

You need a brokerage account to buy an ETF. Open one with a firm like Fidelity, Charles Schwab, E-Trade, or Vanguard. The process takes 10 to 15 minutes online and requires your Social Security number, address, and bank details. Once your account is funded, you can search for an ETF by its ticker symbol (a short code like VOO or SPY) and place an order just as you would for a stock.

You can place a market order, which buys or sells immediately at the current price, or a limit order, which buys or sells only if the price reaches a level you set. Most people use market orders for ETFs because they trade frequently and the price doesn't swing wildly. You can buy as little as one share, or fractional shares if your brokerage supports them.

Selling is the reverse: you log into your account, find the ETF, enter the number of shares you want to sell, and confirm. The cash lands in your account within two business days. You can sell anytime the market is open — 9:30 a.m. to 4 p.m. Eastern time on weekdays when the U.S. stock market is operating.

ETFs versus mutual funds and individual stocks

An ETF and a mutual fund can hold the same investments, but they trade differently. A mutual fund's price is set once per day after the market closes. An ETF's price updates throughout the day. This means an ETF is more flexible if you need to sell quickly, but it also means the price you see on your screen may not be the price you get if you wait an hour. Mutual funds often have higher fees and may require a minimum investment of $1,000 or more. ETFs usually have no minimum.

Buying an individual stock means you own one company and live with its ups and downs. Buying an ETF means you own hundreds or thousands of companies, so one bad earnings report won't crater your investment. But an individual stock can outperform an ETF if you pick a winner. ETFs are simpler and safer for most people; individual stocks require more research and carry more risk.

ETFs are also more tax-efficient than mutual funds. When a mutual fund manager sells a holding at a profit, that gain is passed to all shareholders as a taxable distribution, even if you didn't sell anything. ETFs rarely trigger these distributions because of how they're structured, so you only owe tax when you personally sell at a profit.

Frequently Asked Questions

Can I lose money in an ETF?

Yes. If the stocks or bonds inside the ETF fall in value, your ETF falls too. An index ETF tracking the S&P 500 can drop 20%, 30%, or more during a market downturn. You only lose money if you sell while the price is down. If you hold long enough, markets historically recover, but there's no may provide.

Do I get voting rights if I own an ETF?

No. The fund manager votes on shareholder matters for the companies inside the ETF. You own a piece of the fund, not a piece of the individual companies, so you don't vote. This is one trade-off of owning an ETF instead of individual stocks.

What's the difference between an ETF and a stock?

A stock is ownership in one company. An ETF is a fund holding many stocks (or bonds, or other assets). When you buy a stock, you're betting on that one company. When you buy an ETF, you're betting on many companies at once, which spreads your risk.

Can I buy an ETF in a retirement account?

Yes. ETFs can be held in an IRA, 401(k), or other retirement account. Many people build retirement portfolios entirely from ETFs because of the low fees and ease of trading. Check your account provider to confirm they offer ETF trading — most do.

How do I know which ETF to buy?

Start with your goal: broad U.S. stock exposure, international stocks, bonds, or a specific sector. Then compare expense ratios — lower is better. Look at trading volume (how many shares trade daily) — higher volume means tighter prices and easier selling. Read the fund's prospectus to confirm what it holds. Many people start with a low-cost index ETF like VOO or VTI and add others based on their strategy.