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What Is an ETF?

An ETF lets you buy a whole basket of stocks in a single trade. It's the simplest way for a beginner to own dozens — or thousands — of companies at once.

One ticker, many stocks

An ETF (exchange-traded fund) is a fund that holds a collection of assets — often stocks — and trades on an exchange just like a single share. Buy one share of a broad-market ETF and you instantly own a sliver of every company in it. That built-in diversification is why ETFs are so popular with beginners.

1 ETF share holds dozens of stocks inside

Index ETFs vs active ETFs

Most ETFs are index funds: they simply track a benchmark like the S&P 500, holding the same companies in the same proportions. Because no manager is picking stocks, their fees are tiny. Active ETFs employ a manager who tries to beat the market — and charge more for the attempt. Decades of data show low-cost index ETFs are hard to beat over the long run.

The expense ratio

Every ETF charges an expense ratio — an annual fee taken as a percentage of your investment. A 0.03% expense ratio costs $3 a year on $10,000; a 0.75% active fund costs $75. Over decades, that gap compounds into a serious difference, which is why low-cost ETFs are a beginner favourite.

ETF vs mutual fund

FeatureETF
TradesAll day on an exchange, like a stock.
MinimumThe price of one share (or less, fractionally).
FeesOften very low, especially index ETFs.
DiversificationBuilt in — many holdings in one fund.

Practice the building blocks: our games trade individual tickers so you can feel what an ETF smooths out — own several sectors at once in the simulator to mimic a fund.

Not advice: educational content only; no specific ETF is recommended. See investor.gov for official fund basics.

Build on this with how to diversify a portfolio, what is a stock market index, and how to start investing.

FAQ

Frequently asked questions

What is an ETF in simple terms?

An ETF is a fund that holds a basket of investments — usually stocks — and trades on an exchange like a single share, giving you instant diversification in one purchase.

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

ETFs trade throughout the day on an exchange like a stock and often have very low fees, while traditional mutual funds price once a day and can carry higher costs and minimums.

What is an expense ratio?

It is the annual fee an ETF charges, shown as a percentage. A 0.03% expense ratio costs about $3 per year on a $10,000 investment.

Are ETFs good for beginners?

Many beginners like low-cost index ETFs because a single purchase spreads money across many companies, reducing the risk of any one stock hurting the portfolio.

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