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 of both — bundled together and sold as one security. You buy and sell it the same way you would buy and sell a single company's stock: through a brokerage account, during market hours, at a price that changes throughout the day.

The key difference between an ETF and owning individual stocks is that one ETF share gives you exposure to dozens, hundreds, or sometimes thousands of holdings at once. If you buy an ETF that tracks the S&P 500, for example, you own a piece of 500 large American companies with a single purchase. You do not have to pick which companies or manage them yourself.

ETFs are managed by fund companies. A fund manager decides which investments go into the ETF, rebalances the holdings when needed, and collects a small fee for doing so. That fee — called an expense ratio — is deducted automatically from your returns each year and varies by fund, typically ranging from under 0.1% to over 1% annually.

Key Takeaways

  • An ETF bundles many investments into one security you can buy and sell like a stock during market hours.
  • ETFs are cheaper and simpler than buying individual stocks because you get instant diversification with one purchase.
  • The expense ratio is the annual fee the fund company charges, and it varies widely depending on the fund type and manager.
  • ETFs are traded on exchanges like the NYSE or NASDAQ, so their price moves throughout the day based on supply and demand.
  • Most ETFs are passively managed, meaning they track an index rather than trying to beat the market through active stock picking.

How ETFs differ from mutual funds

Mutual funds also bundle many investments together, but they work differently in one important way: mutual funds are priced once per day, after the market closes. You place an order during the day, but you do not know the exact price you will pay until the end of trading. ETFs, by contrast, trade throughout the day at changing prices, just like individual stocks.

Mutual funds are also typically bought directly from the fund company or through a financial advisor, whereas ETFs are bought through a brokerage account. This makes ETFs more accessible to individual investors and often cheaper to buy — you pay a standard stock commission rather than a sales charge or load.

Mutual funds are more likely to be actively managed, meaning a fund manager tries to beat the market by picking specific investments. ETFs are more often passively managed, tracking a preset index like the Nasdaq-100 or the total bond market. Passive management usually means lower fees.

What types of ETFs exist

ETFs come in many varieties. Stock ETFs hold shares of companies and track indexes like the S&P 500, the Russell 2000, or specific sectors like technology or healthcare. Bond ETFs hold government or corporate bonds and track bond indexes. Commodity ETFs track the price of oil, gold, or agricultural products. International ETFs focus on stocks or bonds outside the United States.

There are also sector ETFs, which focus on one industry; dividend ETFs, which hold stocks known for paying dividends; and factor ETFs, which target stocks with specific characteristics like low volatility or high value. Some ETFs are very narrow — tracking only companies in a single country or a single industry — while others are broad, like an ETF that holds the entire U.S. stock market.

A smaller category called leveraged ETFs and inverse ETFs use derivatives to amplify gains or bet against the market. These are riskier and designed for short-term trading, not long-term holding.

Why people use ETFs instead of individual stocks

Buying individual stocks requires research: you have to pick which companies to own, monitor them, and decide when to sell. ETFs remove that burden. You get instant diversification — if one company in the fund performs poorly, the others cushion the loss. You also avoid the risk of putting too much money into a single company that turns out to be a bad investment.

ETFs are also cheaper than paying a financial advisor to manage your money. An advisor typically charges 0.5% to 1.5% per year, while many ETFs charge 0.1% or less. Over decades, that difference compounds significantly.

For beginners, ETFs are simpler. You can build a diversified portfolio with just two or three ETF purchases — for example, one U.S. stock ETF, one international stock ETF, and one bond ETF. Rebalancing is also easier: you simply buy more of whichever ETF has fallen behind your target allocation.

How ETF prices work and what moves them

An ETF's price is set by supply and demand on the exchange, not by the fund company. If many people want to buy an ETF, its price rises. If many want to sell, it falls. This happens throughout the trading day, so the price you see at 9:30 a.m. may be different from the price at 3 p.m.

The underlying value of an ETF — the total worth of all the stocks or bonds it holds — is called its net asset value, or NAV. The ETF's market price usually stays very close to the NAV because of a mechanism called arbitrage. If the price drifts too far from the NAV, large investors can profit by buying the cheaper version and selling the more expensive one, which pushes the price back in line.

An ETF's price moves based on what happens to the investments inside it. If you own a stock ETF and the companies in that ETF report strong earnings, the ETF's price typically rises. If the economy slows and investors become fearful, stock ETF prices usually fall. Bond ETFs move differently — they often rise when stock prices fall, because investors shift money to safer investments.

Costs and fees to understand

The main cost of owning an ETF is the expense ratio, which is charged automatically each year. A fund with a 0.1% expense ratio costs $10 per year for every $10,000 you invest. A fund with a 1% expense ratio costs $100 per year on the same amount. Over time, even small differences in fees add up.

When you buy or sell an ETF through a brokerage, you may also pay a commission — a flat fee per trade. Many brokerages now offer commission-free ETF trading, so this cost has become less common. Some brokerages charge it only on certain ETFs or only if you trade frequently.

You may also encounter a bid-ask spread, which is the difference between the price someone is willing to pay (the bid) and the price someone is willing to sell at (the ask). For popular, heavily traded ETFs, this spread is tiny — often just a penny or two per share. For less popular ETFs, the spread can be wider, costing you more when you buy or sell.

Tax treatment of ETFs

ETFs are generally more tax-efficient than mutual funds. When a mutual fund manager sells stocks to rebalance the fund, those gains are passed on to all shareholders as taxable distributions, even if you did not sell your shares. ETFs avoid this through a mechanism called in-kind redemption, which allows large investors to exchange their ETF shares for the underlying stocks without triggering a taxable event for other shareholders.

You do pay capital gains tax when you sell an ETF at a profit, just as you would with a stock. If the ETF pays dividends, you owe tax on those dividends in the year you receive them, unless the ETF is held in a tax-advantaged account like a 401(k) or IRA.

Holding an ETF in a retirement account shields you from annual taxes on gains and dividends. The tax bill comes only when you withdraw money from the account in retirement.

Frequently Asked Questions

Can I lose money in an ETF?

Yes. If the stocks or bonds inside the ETF fall in value, your ETF shares fall too. Diversification reduces the risk that any single bad investment will wipe out your money, but it does not eliminate market risk. A broad stock ETF might fall 20% or more in a bad year. Bond ETFs typically fall less but can still decline if interest rates rise sharply.

Do I get dividends from an ETF?

Many ETFs do pay dividends, especially stock and bond ETFs. The fund collects dividends from the companies or bonds it holds and passes them on to shareholders, usually quarterly or annually. You can choose to receive the cash or reinvest it automatically to buy more ETF shares.

What is the difference between an index ETF and an actively managed ETF?

An index ETF tracks a preset list of investments — for example, all 500 companies in the S&P 500 — and rarely changes. An actively managed ETF has a manager who picks and chooses which investments to hold, trying to beat the market. Index ETFs have lower fees because there is less work involved. Most research shows index ETFs outperform actively managed ones over long periods.

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

Yes. You can buy a single share of almost any ETF, and ETF share prices range from under $20 to over $400 depending on the fund. You only need enough money to buy one share plus any commission your brokerage charges. Many brokerages offer commission-free ETF trading, so you might start with as little as $20 or $50.

How do I know which ETF to choose?

Start by deciding what you want to own — U.S. stocks, international stocks, bonds, or a mix. Then compare ETFs in that category by expense ratio, trading volume, and how long the fund has existed. Higher trading volume means a tighter bid-ask spread and easier buying and selling. Lower expense ratios save you money over time. Many investors simply choose the largest, lowest-cost ETF in each category.