An ETF, or exchange-traded fund, is a basket of investments wrapped into one fund that trades on a stock exchange. Buy one share, and you own a small slice of everything inside the fund. Some ETFs hold hundreds of stocks. Others hold bonds, commodities, or a mix.
This guide explains what an ETF is, how it works, and where it sits next to mutual funds and individual stocks. It also covers how to buy one through a broker like Robinhood.
What ETF Stands For
ETF stands for exchange-traded fund. The fund part means it pools money from many investors and uses that money to buy a set of investments. The exchange-traded part means you can buy or sell shares of the fund on a stock exchange during market hours, just like a regular stock.
The first US ETF, SPY, launched in 1993 and tracked the S&P 500. Since then, the ETF industry has grown into trillions of dollars across thousands of funds.
What Goes Inside an ETF
Each ETF has a stated goal in its prospectus. The fund manager buys assets that match that goal.
Stock ETFs
Many ETFs hold stocks. Some track a broad index like the S&P 500. Others focus on a sector, a country, or a theme like clean energy.
Bond ETFs
Bond ETFs hold loans made to governments or companies. The fund collects interest and passes it to shareholders. These funds tend to be lower risk than stock ETFs, but they can still drop in price when rates rise.
Commodity and Other ETFs
Some ETFs hold physical gold, oil futures, or a basket of commodities. Others may hold real estate, currencies, or even crypto, depending on the rules in your country.
Robinhood
Robinhood
Robinhood is a trading platform that brings stocks, ETFs, options, futures, prediction markets, crypto, and retirement accounts together in one app.
Standout feature
One platform for stocks, ETFs, options, futures, prediction markets, and crypto
Fees
$0 commission on stocks, ETFs, and options.
Pros
Zero-commission trading on stocks, ETFs, and options
Cons
Best perks (high APY, lower margin rates) require Gold subscription ($5/month)
How an ETF Trades
ETF shares trade on an exchange like any stock. The price moves all day based on supply, demand, and the value of the assets inside the fund.
Live Pricing
During market hours, you see a live price for each ETF. You can place market orders, limit orders, and stop orders. This is one major difference from mutual funds, which price only once per day.
Fractional Shares
Many brokers offer fractional ETF shares. That means you can buy half of one share or even one-tenth of a share. You set a dollar amount, and the broker buys whatever fraction matches.
ETF vs Mutual Fund
ETFs and mutual funds are close cousins, but they differ in a few key ways.
Trading
ETFs trade all day on an exchange. Mutual funds price once a day, after the close.
Minimums
Mutual funds often have a minimum to open a position, sometimes a few thousand dollars. Most ETFs only require the price of one share, or even less if your broker offers fractional shares.
Fees
Many ETFs have very low expense ratios. Many mutual funds also have low fees, but actively managed mutual funds can charge much more.
Taxes
In a taxable account, ETFs are often slightly more tax efficient than mutual funds. In a Roth IRA, traditional IRA, or 401(k), this gap matters less. A tax professional can help with your situation.
ETF Costs to Watch
An ETF charges an expense ratio, which is an annual fee taken out of the fund's assets. You do not pay it as a separate bill. Many broad-market ETFs charge less than 0.10 percent per year. On a 10,000 dollar position, that is around 10 dollars per year or less.
If you buy through a broker like Robinhood, there is no commission on US-listed ETFs. You may still pay tiny fees set by regulators, but they are very small.
Pros and Cons of ETFs
Pros
- Easy diversification across many holdings in a single trade.
- Low fees on many broad-market funds.
- Flexible trading throughout the day.
- Fractional shares at many brokers make small investments possible.
Cons
- You can still lose money. Each ETF carries its own risk.
- Specialty ETFs can hold concentrated bets that may swing hard.
- Leveraged or inverse ETFs are built for short holding periods and can hurt long-term holders.
- Not all ETFs are cheap. Some niche or active ETFs charge more than 0.50 percent per year.
How to Buy an ETF
The process is the same as buying any stock.
- Open a brokerage account at a broker you trust.
- Transfer money from your bank.
- Find the ETF you want and note its ticker symbol.
- Choose a market or limit order, and place it during market hours.
- Decide whether to reinvest dividends and set that option in your account.
Many brokers, including Robinhood, offer recurring buys. You pick a fixed amount and a schedule, and the broker buys the ETF for you.
Common ETF Mistakes
A few patterns trip up new investors.
First, buying based only on a recent strong run. Past performance does not guarantee future results, and chasing the hottest fund can lead to buying at the top.
Second, using leveraged or inverse ETFs as long-term holdings. These are built for short bursts. Holding them for weeks or months can drift far from what you expect.
Third, ignoring the fees. A 1 percent expense ratio sounds small, but on a 10,000 dollar position, that is 100 dollars per year. Over decades, fees add up.
Who ETFs Suit
ETFs work well for many investors, from someone starting with 50 dollars to someone managing a large retirement account. They allow broad diversification, low fees, and easy buying through any brokerage account.
They may not suit someone who wants daily principal protection. For that need, a high-yield savings account or short-term Treasury ETF may fit better. Talk with a financial advisor if you are not sure where to start.
Frequently Asked Questions
Is an ETF the same as a stock?
No. A stock is one share of one company. An ETF is a fund that owns many investments. When you buy an ETF, you get a small share of each holding in the fund.
Can I lose money in an ETF?
Yes. Every ETF carries some risk. A stock ETF can fall when markets drop. A bond ETF can drop when rates rise. Even broad, diversified ETFs can have years of losses.
Do I need a lot of money to start?
No. You can often start with the price of one share, sometimes under 100 dollars. Brokers like Robinhood that offer fractional shares let you start with as little as a few dollars.
Are ETFs better than mutual funds?
It depends on what you want. ETFs offer all-day trading, low minimums, and often low fees. Mutual funds may suit you better if your 401(k) only offers funds rather than ETFs. Both can play a useful role in a long-term plan.
