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Investing » How to Invest in ETFs: Build a Diversified Portfolio

How to Invest in ETFs: Build a Diversified Portfolio

Discover 5 key steps to investing in ETFs, including choosing the right fund, avoiding mistakes, and managing risks effectively.
Author: Baruch Mann (Silvermann)
Interest Rates Last Update: April 1, 2025
The banking product interest rates, including savings, CDs, and money market, are accurate as of this date.
Author: Baruch Mann (Silvermann)
Interest Rates Last Update: April 1, 2025

The banking product interest rates, including savings, CDs, and money market, are accurate as of this date.

We earn a commission from our partner links on this page. It doesn't affect the integrity of our unbiased, independent editorial staff. Transparency is a core value for us, read our advertiser disclosure and how we make money.

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Table Of Content

An ETF holds a basket of assets—like stocks, bonds, or commodities—and trades on an exchange like a stock.

It’s popular among both beginner and experienced investors because ETFs offer instant diversification, low fees, and flexibility to buy or sell throughout the day.

ETF Expense Ratios Explained

How to Invest in ETFs: 5 Practical Steps for Beginners

Investing in ETFs can be a smart, low-cost way to build wealth. These five practical steps will help you choose the right ETFs, avoid risks, and start investing with confidence.

1. Assess Your Financial Goals and Risk Tolerance

Before choosing any ETF, it’s essential to understand your goals—are you investing for long-term growth, income, or capital preservation?

Also, consider your risk tolerance. A 25-year-old saving for retirement might be fine with a tech-heavy ETF like QQQ, while a retiree may prefer a bond ETF like AGG

  • Growth-focused investors might choose sector ETFs (e.g., clean energy, biotech).

  • Income-seekers can consider dividend ETFs like VIG or SCHD.

  • Conservative investors may prefer bond ETFs or broad market ETFs like VTI.

  • Short-term goals may require more liquid, low-volatility options

To build a portfolio that fits, match your goals with the ETF's volatility and potential return.

ETF Type
Key Risk
Sector ETFs
Industry downturns
Bond ETFs
Interest rate risk
Thematic ETFs
Volatility, hype-based pricing
International ETFs
Currency/political risk
Leveraged ETFs
Compounding risk over time

2. Learn the Different Types of ETFs

Not all ETFs are created equal. You need to understand the difference between index ETFs and actively managed ETFs

  • Index ETFs: Passive, lower-cost, track major indices (e.g., VOO, IVV).

  • Actively managed ETFs: Higher turnover, may outperform or underperform indexes.

  • Sector and thematic ETFs: Focused on specific industries or trends (e.g., AI, energy).

  • Bond or commodity ETFs: Useful for income or diversification beyond stocks.

Feature
Index ETFs
Actively Managed ETFs
Strategy
Passive (tracks a market index)
Active (fund managers select holdings)
Fees (Expense Ratio)
Usually low (0.03%–0.10%)
Higher (0.30%–1.00%)
Transparency
Full daily holdings disclosure
May have delayed or limited disclosures
Performance Consistency
Closely matches index performance
Varies based on manager decisions
Best for
Long-term, cost-conscious investors
Tactical investors seeking alpha

3. Research ETFs (Focus on Holdings, Fees & Liquidity)

Once you've narrowed down the type, examine each ETF’s specific characteristics. Look at the expense ratio, which is the annual fee taken from your investment—lower is usually better. 

  • Check the expense ratio (ideally under 0.10% for passive funds).

  • Review liquidity—high trading volume means tighter spreads.

  • Understand tracking error—how well the ETF mirrors its index.

  • Use sites like ETF.com or Morningstar to analyze performance and composition.

Also, analyze the top holdings. For example, SPY heavily weights Apple, Microsoft, and Amazon, which means it’s not as diversified as it may appear.

Sector ETF Type
Example ETF
Common Use Case
Technology
QQQ, XLK
Growth investing, future innovation exposure
Healthcare
XLV, VHT
Defensive investing, aging population trends
Energy
XLE, VDE
Inflation hedge, commodity exposure
Dividend/Income
SCHD, VIG
Passive income generation in retirement accounts
Bonds / Fixed Income
AGG, BND
Risk reduction, capital preservation
Thematic / Disruptive
ARKK, BOTZ
High-risk, high-reward sector or trend investing

4. Choose a Brokerage and Fund Access Platform

ETFs are available on most online brokerage platforms, so choosing the right one can impact your experience and costs.

Broker
Annual Fees
Best For
Robinhood
$0 – $6.99 $0 for basic account, $6.99 for Robinhood Gold
Beginner Stock & Crypto Traders
SoFi Invest
$0
Automated Investing & Beginners
eToro
$0
Copy & Social Trading
Wealthfront
0.25%
Hands-Off Investors
Webull
$0
Active Day Traders
Cash App Invest
$0
Easy Stocks & Bitcoin Purchases
Ally Invest
$0
Mobile-Friendly Investing

Some brokers, like Robinhood or Charles Schwab, offer commission-free ETF trading. Certain platforms also provide in-depth research tools, automatic investing features, or access to fractional ETF shares.

  • Brokerages with no ETF commissions: Fidelity, Schwab, Vanguard, Robinhood.

  • Features to consider: usability, research tools, auto-investing, fractional shares.

  • Retirement account compatibility: Make sure the platform supports IRAs or Roth IRAs if needed.

If you're a long-term investor, look for platforms that allow automated investing in ETFs via recurring deposits or robo-advisors.

5. Place Your First ETF Trade and Monitor Your Investment

Buying an ETF is just like buying a stock—use your brokerage account to search the ticker symbol and place a market or limit order.

  • Market order: Buys at the current price (best for high-volume ETFs).

  • Limit order: Sets your maximum price—useful in volatile markets.

  • Rebalance annually to align with your goals.

  • Track performance vs. index to ensure it's meeting expectations

However, don’t just “set and forget.” Review your ETF performance at least quarterly and rebalance your portfolio as needed. For example, if your tech ETF grows to 40% of your portfolio, you may want to trim it to maintain balance..

Monitoring helps you avoid overweight positions and allows you to pivot if the ETF no longer fits your investment strategy.

Getting Started with ETFs: Common Mistakes to Avoid

Investing in ETFs can be straightforward, but beginners often overlook a few key risks. Here are mistakes to avoid:

Just because two ETFs have “tech” in their name doesn’t mean they own the same stocks.

For example, the Invesco QQQ Trust focuses on large-cap tech firms like Apple and Microsoft, while the ARK Innovation ETF includes high-growth startups.

Always check the fund's fact sheet.

Investors often buy ETFs that performed well recently, assuming the trend will continue. But markets rotate.

For instance, energy ETFs surged in 2022, but lagged in 2023. Therefore, evaluate long-term fundamentals, not just short-term returns.

While most ETFs are low-cost, fees can still eat into returns over time.

A 0.75% annual fee might not seem like much, but it can make a difference in a passive portfolio compared to a 0.03% fund like Vanguard Total Stock Market ETF.

Some ETFs—especially those focused on income or commodities—have tax implications. Holding them in a taxable account may lead to higher bills. In order to reduce this, consider placing dividend or bond ETFs inside tax-advantaged accounts like IRAs.

FAQ

Yes, many brokers offer fractional shares, allowing you to invest in ETFs with as little as $5 or $10. This makes ETFs accessible for beginners and budget-conscious investors.

Some ETFs, especially those focused on dividend-paying stocks or bonds, distribute regular income. You can choose to reinvest these dividends or receive them as cash.

ETFs can be held in IRAs and 401(k)s and are a great option for long-term retirement planning. Tax-advantaged accounts can also help minimize taxes on dividends or gains.

While it's rare, a highly concentrated or poorly managed ETF could become worthless. Broad market ETFs, however, are diversified and far less likely to collapse entirely.

ETFs are generally tax-efficient due to their structure. However, you may owe capital gains taxes when selling for a profit or on dividends received in a taxable account.

Yes, many brokers offer auto-investing features that allow you to schedule recurring ETF purchases. This supports dollar-cost averaging and consistent investing over time.

Some traders use leveraged or inverse ETFs for short-term trades. But these are risky and not recommended for beginners or long-term investors due to volatility and compounding effects.

There are no mandatory holding periods for ETFs. However, frequent trading can lead to higher costs and tax consequences, especially in taxable accounts.

Yes, many ETFs focus on global markets or specific countries like China or India. These offer diversification but also come with currency and geopolitical risks.

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Picture of Baruch Mann (Silvermann)

Baruch Mann (Silvermann)

Baruch Silvermann is a financial expert, experienced analyst, and founder of The Smart Investor.  Silvermann has contributed to Yahoo Finance and cited as an authoritative source in financial outlets like Forbes, Business Insider, CNBC Select, CNET, Bankrate, Fox Business, The Street, and more.
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This website is an independent, advertising-supported comparison service. The product offers that appear on this site are from companies from which this website receives compensation. This compensation may impact how and where products appear on this site (including, for example, the order in which they appear).

This website does not include all card companies or all card offers available in the marketplace. This website may use other proprietary factors to impact card offer listings on the website such as consumer selection or the likelihood of the applicant’s credit approval.

This allows us to maintain a full-time, editorial staff and work with finance experts you know and trust. The compensation we receive from advertisers does not influence the recommendations or advice our editorial team provides in our articles or otherwise impacts any of the editorial content on The Smart Investor.

While we work hard to provide accurate and up to date information that we think you will find relevant, The Smart Investor does not and cannot guarantee that any information provided is complete and makes no representations or warranties in connection thereto, nor to the accuracy or applicability thereof.

Learn more about how we review products and read our advertiser disclosure for how we make money. All products are presented without warranty.