Learn How to Buy ETFs and Understand Exchange-Traded Funds

What Are Exchange-Traded Funds (ETFs) and How Do They Work?

An exchange-traded fund, or ETF, is a type of investment product that holds a collection of stocks, bonds, or other assets bundled together. When you buy an ETF, you own a small piece of that entire collection rather than buying individual stocks one at a time. Think of it like buying a slice of pizza instead of buying wheat, sauce, and cheese separately to make your own pizza.

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ETFs trade on stock exchanges just like individual company stocks do. This means you can buy and sell them during regular market hours, typically between 9:30 a.m. and 4:00 p.m. Eastern Time on weekdays when the market is open. The price of an ETF changes throughout the trading day based on supply and demand, similar to how the price of a single stock moves.

According to the Investment Company Institute, as of 2023, there were over 2,800 ETFs available in the United States, with combined assets totaling more than $7 trillion. This growth reflects how popular ETFs have become for both beginning and experienced investors. The variety available means investors can find ETFs that match different goals and risk levels.

Each ETF has a specific purpose or strategy. For example, some ETFs track the S&P 500 (a group of 500 large U.S. companies), while others focus on technology companies, emerging markets, bonds, or specific industries. Some ETFs follow an index, meaning they try to match the performance of a particular market benchmark. Others are actively managed, meaning a professional manager makes decisions about which holdings to include.

The main advantage of ETFs compared to buying individual stocks is diversification. By owning one ETF, you automatically own dozens, hundreds, or even thousands of different investments. If one company performs poorly, it has less impact on your overall investment because you own many others. This spreading of risk is a key reason many investors choose ETFs.

Practical Takeaway: Before investing, take time to understand that an ETF is essentially a basket of investments that trades like a stock. Knowing this basic structure will help you make informed decisions about which ETFs might match your investment goals.

Understanding the Different Types of ETFs Available

The ETF market offers numerous varieties designed for different investment strategies and goals. Learning about the major categories will help you understand what options exist and which ones might align with your objectives.

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Index ETFs are the most common type. These funds track a specific index, which is a pre-set group of securities. For instance, the Vanguard S&P 500 ETF tracks the 500 largest U.S. companies. Because index ETFs simply follow a predetermined list, they typically have lower fees than other types. The expense ratio (the annual cost to own the ETF) for many index ETFs ranges from 0.03% to 0.20%, meaning you pay between $3 and $20 per year for every $10,000 invested.

Actively managed ETFs employ fund managers who make decisions about which investments to buy and sell. These managers aim to outperform the market, but their services come with higher costs. Expense ratios for actively managed ETFs often range from 0.40% to 1.00% or higher. Some investors believe the potential for better returns justifies the higher fees, while others prefer the lower costs of index ETFs.

Bond ETFs hold fixed-income securities like government or corporate bonds. These ETFs may appeal to investors seeking steadier income and lower risk than stock-based ETFs. Examples include Treasury bond ETFs, corporate bond ETFs, and municipal bond ETFs. Bond ETFs with shorter-term bonds typically fluctuate less in price than those holding longer-term bonds.

Sector and industry ETFs focus on specific parts of the economy. Technology ETFs, healthcare ETFs, renewable energy ETFs, and financial services ETFs all exist. These allow investors to take larger positions in areas they believe will perform well. However, they offer less diversification than broad market ETFs because they concentrate holdings in fewer companies within one industry.

International and emerging market ETFs provide exposure to companies and governments outside the United States. Developed market ETFs might focus on Europe or Japan, while emerging market ETFs target countries like Brazil, India, or Vietnam. These ETFs can offer different growth potential but also carry different risks, including currency fluctuations.

Specialty ETFs include options like real estate ETFs (which hold properties or real estate companies), commodity ETFs (which track prices of gold, oil, or agricultural products), and thematic ETFs (which focus on trends like artificial intelligence or clean energy).

Practical Takeaway: Create a simple list of ETF types and their basic characteristics. Understanding the differences between index and actively managed ETFs, stock and bond ETFs, and domestic and international options will help you narrow down which categories might suit your investment approach.

Steps to Open a Brokerage Account and Purchase ETFs

To buy ETFs, you need a brokerage account—an account held with a company that executes trades on your behalf. Opening an account is a straightforward process that most people complete online in under 20 minutes.

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Start by choosing a brokerage firm. Well-known options include Fidelity, Charles Schwab, E*TRADE, Vanguard, TD Ameritrade, and Interactive Brokers. Each offers different features, fee structures, and user interfaces. Many brokerages offer commission-free trading on ETFs, meaning you pay no transaction fee when you buy or sell. Before selecting a brokerage, review their educational resources, trading platforms, and customer service options to find one that matches your needs.

The account opening process typically involves providing personal information including your name, address, Social Security number, and employment information. You'll need to agree to the firm's terms of service and confirm that you understand the risks of investing. Most brokerages require you to be at least 18 years old and a U.S. citizen or resident alien.

After opening your account, you must fund it by transferring money from your bank. You can usually do this through electronic bank transfer, check deposit, or wire transfer. The initial funding typically takes one to three business days to appear in your brokerage account.

Once your account is funded, you're ready to purchase ETFs. Log into your brokerage account and look for the "buy" or "trade" section. Enter the ETF's ticker symbol (a short code like "SPY" for the SPDR S&P 500 ETF). The brokerage will show you the current price and allow you to specify how many shares you want to buy. You can buy fractional shares at most modern brokerages, meaning you don't need enough money for a full share—you could invest $100 even if one share costs $150.

Before confirming your order, review the details: the number of shares, the price per share, and the total cost. Once you confirm, your order goes to the market. During market hours, it typically executes within seconds. After hours or during market closures, your order may execute at the next market opening.

After your purchase, the ETF shares appear in your account. You can view your holdings, see the current value, and track performance. Most brokerages provide tools to monitor your investments and show your overall account value.

Practical Takeaway: Research two or three brokerages to compare their features and fee structures. Once you select one, plan to spend about 20-30 minutes opening your account and funding it with your first investment amount.

Evaluating ETF Performance and Choosing the Right Funds

Selecting ETFs requires understanding how to read performance data and evaluate whether a particular fund matches your goals. Learning to interpret key metrics will improve your decision-making process.

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Start by understanding an ETF's expense ratio, the percentage of your investment that goes toward annual operating costs. For example, an ETF with a 0.10% expense ratio costs $1 annually for every $1,000 invested. While this seems small, it compounds over time. Over 30 years, choosing an ETF with a 0.10% expense ratio instead of a 1.00% ratio could result in significantly more wealth, assuming similar investment performance otherwise.

Performance metrics show how an ETF has returned value to investors. Look at returns over different time periods: one year, three years,