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. Instead of buying individual stocks one at a time, you buy one share of an ETF and own a slice of dozens or hundreds of investments inside it. The fund itself is listed on a stock exchange — the same place individual stocks trade — so you can buy and sell it during market hours just like you would Apple or Microsoft.

The main difference between an ETF and owning stocks outright is simplicity and spread. One ETF share might give you exposure to the entire S&P 500, or all dividend-paying stocks, or all companies in a particular industry. You get instant diversification without having to research and purchase each holding separately.

Key Takeaways

  • An ETF holds a basket of stocks or bonds and trades as a single security on a stock exchange during market hours.
  • You own a proportional slice of everything inside the fund, so one ETF share gives you exposure to many companies at once.
  • ETFs typically charge lower fees than actively managed mutual funds because many simply track an index rather than paying a manager to pick stocks.
  • You can buy and sell ETF shares anytime the market is open, unlike mutual funds which only trade once per day at closing price.

How an ETF differs from a mutual fund

Both ETFs and mutual funds hold baskets of investments, but they work differently in practice. A mutual fund is priced once per day after the market closes, and all trades happen at that single price. An ETF trades throughout the day like a stock, so the price changes minute to minute based on supply and demand.

Mutual funds are often actively managed, meaning a person or team decides which stocks to buy and sell to try to beat the market. ETFs are frequently passive — they simply track an index like the S&P 500 or the Nasdaq 100, buying whatever stocks are in that index and rebalancing when the index changes. Passive tracking usually costs less in fees because there is no manager making constant decisions.

You can also buy mutual funds directly from the fund company, but ETFs must be purchased through a brokerage account, the same way you buy individual stocks. This makes ETFs more accessible if you already have a brokerage account open.

What you actually own when you buy an ETF

When you own one share of an ETF, you own a proportional piece of every holding inside it. If an ETF contains 500 stocks and you own one share, you own one five-hundredth of each of those 500 stocks (divided by the total number of ETF shares outstanding). You do not own the stocks directly — the fund holds them — but you benefit from their performance.

Some ETFs pay dividends. If the companies inside the fund pay dividends, the ETF collects that money and distributes it to shareholders, usually once or four times per year depending on the fund. You can take the dividend as cash or reinvest it to buy more ETF shares.

If the value of the stocks inside the ETF goes up, the ETF share price goes up with it. If they fall, so does the ETF price. You make or lose money based on whether you sell at a higher or lower price than you paid, just as you would with an individual stock.

Common types of ETFs and what they track

Index ETFs track a specific benchmark. The most common are broad market funds that follow the S&P 500, the total U.S. stock market, or international markets. Others track specific sectors like technology, healthcare, or energy. Some follow bonds, commodities, or real estate investment trusts (REITs).

Dividend-focused ETFs hold companies known for paying regular dividends to shareholders. Growth ETFs emphasize stocks expected to increase in value. Value ETFs focus on stocks trading below their historical average price. There are also theme-based ETFs that hold companies in emerging industries like renewable energy or artificial intelligence.

Bond ETFs work the same way but hold fixed-income securities instead of stocks. They might track government bonds, corporate bonds, or a mix. Some are designed to be very stable with low risk; others hold riskier bonds that pay higher yields.

Fees and costs you will encounter

Every ETF charges an expense ratio, which is an annual fee expressed as a percentage of your investment. A fund with a 0.03% expense ratio costs you $3 per year for every $10,000 you invest. Index-tracking ETFs typically charge between 0.03% and 0.20%. Actively managed ETFs or specialized funds often charge more, sometimes 0.50% or higher.

Beyond the expense ratio, you pay a commission or trading fee when you buy or sell ETF shares through your brokerage. Many brokerages now offer commission-free ETF trading, but some still charge a small fee per trade. Check your brokerage's fee schedule before you open an account.

You may also encounter a bid-ask spread, which is the difference between the price someone will pay for the ETF (the bid) and the price someone is asking to sell it (the ask). For popular, heavily traded ETFs, this spread is usually tiny — a few cents. For less common ETFs, the spread can be wider, meaning you lose a bit more money on each transaction.

Why people choose ETFs over individual stocks

Buying individual stocks requires research. You have to understand the company, its financials, its competition, and its growth prospects. Most people lack the time or expertise to do this well for dozens of companies. An ETF lets you own a diversified portfolio without that research burden.

Diversification also protects you. If you own 500 stocks through an S&P 500 ETF and one company fails, you lose only a small fraction of your investment. If you own five individual stocks and one fails, you lose 20% of your money. The more holdings you own, the less any single bad pick can hurt you.

ETFs also make it easier to rebalance. If you own individual stocks and want to shift your portfolio, you have to sell some stocks and buy others, triggering multiple trades and tax events. With an ETF, you can adjust your overall allocation by buying or selling a single fund.

Tax considerations when holding ETFs

ETFs are generally more tax-efficient than mutual funds because of how they are structured. When a mutual fund manager sells stocks inside the fund, those capital gains are passed to all shareholders, even if you did not sell your shares. ETFs use a mechanism called in-kind creation and redemption that minimizes these forced distributions.

You still owe taxes on capital gains when you sell an ETF share at a profit, and you owe taxes on dividends the fund distributes to you. But you have more control over when you trigger those taxes because you decide when to sell, rather than the fund manager deciding when to trade.

If you hold an ETF in a tax-advantaged account like a 401(k) or IRA, you do not pay taxes on gains or dividends while the money stays in the account. This is one reason ETFs work well inside retirement accounts.

Frequently Asked Questions

Can I lose money in an ETF?

Yes. If the stocks or bonds inside the ETF fall in value, your ETF share price falls too. You lose money if you sell when the price is lower than what you paid. However, if you hold the ETF long enough for the market to recover, you may recoup those losses. The more diversified the ETF, the less likely a single bad event will wipe out your entire investment.

Do I need a lot of money to start buying ETFs?

No. ETF share prices vary widely — some trade for under $50 per share, others for several hundred dollars. Many brokerages also offer fractional share buying, which means you can invest any dollar amount, even $1, and own a partial share. This makes ETFs accessible regardless of how much money you have to start.

What is the difference between an ETF and an index fund?

An index fund is a mutual fund that tracks an index. An ETF can also track an index, but it trades like a stock. Both are passive and low-cost, but index funds trade once per day while ETFs trade throughout the day. Index funds are often bought directly from the fund company; ETFs are bought through a brokerage.

Should I buy individual ETFs or a fund of funds?

A fund of funds holds multiple ETFs inside it, giving you diversification across different asset types with a single purchase. Individual ETFs let you control exactly what you own and typically charge lower fees. For beginners, a single broad-market ETF or a fund of funds is simpler. As you learn more, you can build a custom portfolio of individual ETFs.

Can I buy and sell ETFs anytime?

You can buy and sell during market hours — typically 9:30 a.m. to 4 p.m. Eastern time on weekdays when the stock exchange is open. You cannot trade ETFs before the market opens or after it closes, and you cannot trade on weekends or market holidays. Your order will execute at whatever price the ETF is trading at when your order reaches the exchange.