Top 5 BlackRock iShares ETFs for Long-Term Investors (IVV, IXUS, AGG)

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 Exchange-Traded Funds (ETFs) have transformed how individuals invest in financial markets. Instead of selecting individual stocks one by one, investors can buy an ETF and instantly gain exposure to dozens, hundreds, or even thousands of companies. Among the global ETF providers, iShares stands as one of the most influential.

Operated by BlackRock, the world’s largest asset manager, iShares manages hundreds of ETFs covering nearly every segment of the market—from broad indexes like the S&P 500 to specialized themes such as emerging markets, bonds, and commodities.

For long-term investors building diversified portfolios, several iShares ETFs consistently appear as core holdings. In this article, we will introduce iShares, examine its role in the ETF industry, and analyze five of the most important iShares ETFs that long-term investors frequently use.


Top 5 iShares ETFs including IVV, AGG, IXUS, EEM, and IWM used by long-term investors for diversified portfolios.

What Is iShares?

iShares is the ETF brand operated by BlackRock, one of the largest asset management firms in the world. BlackRock manages trillions of dollars in assets across mutual funds, ETFs, institutional mandates, and retirement portfolios.

The iShares brand was originally developed by Barclays Global Investors in the early 2000s and later acquired by BlackRock in 2009. Since then, iShares has become one of the dominant ETF families globally.

Today, iShares offers hundreds of ETFs across multiple asset classes, including:

  • U.S. equity ETFs

  • International equity ETFs

  • Bond ETFs

  • Commodity ETFs

  • Factor and thematic ETFs

Because of their large liquidity, low fees, and institutional adoption, many iShares ETFs serve as building blocks in retirement portfolios, institutional portfolios, and passive investment strategies.

For long-term investors, the most widely used iShares ETFs typically track major global indexes.

Why iShares ETFs Are So Widely Used

Several structural reasons explain why iShares funds dominate the ETF ecosystem.

1. Massive Liquidity

Large ETFs attract heavy trading volume. High liquidity means investors can buy and sell shares with minimal price impact, making them efficient for both institutional and retail investors.

2. Institutional Adoption

Pension funds, hedge funds, and asset managers frequently use iShares ETFs for strategic asset allocation. Their scale and reliability make them attractive tools for professional portfolio management.

3. Broad Market Coverage

iShares ETFs track a wide range of indexes, including:

  • S&P 500

  • Russell 2000

  • MSCI EAFE

  • MSCI Emerging Markets

  • U.S. Treasury bond indexes

This coverage allows investors to build diversified portfolios using only a few ETFs.

4. Competitive Fees

Many iShares ETFs offer extremely low expense ratios, which is critical for long-term investors. Even small fee differences can compound into significant costs over decades.

Top 5 iShares ETFs Long-Term Investors Should Know

While iShares offers hundreds of funds, a handful dominate long-term portfolios. These ETFs track major global benchmarks and often serve as core portfolio allocations.

The following five are among the most influential.

1. iShares Core S&P 500 ETF (IVV)

The iShares Core S&P 500 ETF (IVV) is one of the most widely held ETFs in the world. It tracks the S&P 500 Index, which represents roughly 500 of the largest publicly traded companies in the United States.

Because the S&P 500 covers many of the most influential corporations globally, it is often considered the core of the U.S. stock market.

Key Characteristics

  • Tracks the S&P 500

  • Exposure to large-cap U.S. companies

  • Extremely low expense ratio

  • Massive liquidity and institutional adoption

Major Holdings

The largest companies in IVV typically include:

  • Apple

  • Microsoft

  • Nvidia

  • Amazon

  • Alphabet

  • Meta Platforms

These firms dominate global technology, cloud computing, artificial intelligence, and digital infrastructure.

Why Long-Term Investors Use IVV

Many investors view IVV as a core long-term holding because it offers:

  • broad diversification

  • exposure to dominant global companies

  • historically strong long-term returns

For investors seeking a simple strategy, owning an S&P 500 ETF like IVV can already provide exposure to a large portion of the U.S. economy.

2. iShares Core MSCI Total International Stock ETF (IXUS)

While U.S. stocks dominate global markets, long-term investors often seek international diversification.

The iShares Core MSCI Total International Stock ETF (IXUS) provides exposure to thousands of companies outside the United States.

What IXUS Tracks

IXUS follows the MSCI ACWI ex USA Index, which includes both developed and emerging markets.

This means the ETF includes companies from regions such as:

  • Europe

  • Japan

  • Canada

  • Australia

  • China

  • India

  • South Korea

  • Brazil

Why International Exposure Matters

Although U.S. companies have performed strongly in recent decades, global market leadership changes over time. International exposure can reduce concentration risk in a portfolio.

IXUS allows investors to diversify across global economies, currencies, and industries.

For long-term investors building globally diversified portfolios, IXUS is often paired with an S&P 500 ETF.

3. iShares Core U.S. Aggregate Bond ETF (AGG)

Stocks are only one part of long-term investing. Many portfolios also include bonds to reduce volatility and provide income.

The iShares Core U.S. Aggregate Bond ETF (AGG) tracks the Bloomberg U.S. Aggregate Bond Index, one of the most widely followed bond benchmarks.

What AGG Includes

AGG holds a broad mix of investment-grade bonds, including:

  • U.S. Treasury bonds

  • government agency bonds

  • mortgage-backed securities

  • corporate bonds

This diversified structure makes AGG a popular core bond ETF.

Role in a Portfolio

For long-term investors, bond ETFs like AGG often serve several purposes:

  • reducing portfolio volatility

  • generating steady income

  • providing diversification from equities

Although bond allocations have declined in many modern portfolios, they still play an important role in risk management.

4. iShares MSCI Emerging Markets ETF (EEM)

Emerging markets represent some of the fastest-growing economies in the world. Countries such as China, India, Brazil, and Indonesia have experienced rapid economic expansion over the past few decades.

The iShares MSCI Emerging Markets ETF (EEM) offers exposure to these markets.

Major Country Exposure

EEM typically includes companies from:

  • China

  • Taiwan

  • India

  • South Korea

  • Brazil

  • Saudi Arabia

Many of the companies in the ETF operate in industries such as semiconductors, banking, telecommunications, and consumer technology.

Why Investors Use EEM

Emerging markets can offer:

  • higher economic growth potential

  • demographic advantages

  • expanding middle classes

However, they also carry higher risks, including political instability, currency fluctuations, and regulatory uncertainty.

For this reason, many long-term portfolios allocate a smaller portion to emerging market ETFs.

5. iShares Russell 2000 ETF (IWM)

Large companies dominate the S&P 500, but the U.S. economy also includes thousands of smaller firms.

The iShares Russell 2000 ETF (IWM) tracks the Russell 2000 Index, which represents small-cap U.S. companies.

What Makes Small Caps Different

Small-cap companies tend to have:

  • higher growth potential

  • greater volatility

  • more sensitivity to economic cycles

Because they are earlier in their corporate life cycles, some small-cap companies eventually become large industry leaders.

Why Investors Add Small-Cap Exposure

Many investors add small-cap ETFs like IWM to capture potential higher growth opportunities.

However, small caps also experience larger drawdowns during economic downturns, so their allocation is usually limited in balanced portfolios.

How These ETFs Fit Together in a Portfolio

Although each of these ETFs focuses on a different market segment, they can also be combined to create a diversified portfolio.

A simple structure might include:

  • U.S. large-cap stocks (IVV)

  • international stocks (IXUS)

  • emerging markets (EEM)

  • small-cap stocks (IWM)

  • bonds (AGG)

This structure covers multiple asset classes, geographic regions, and company sizes.

Many retirement portfolios and institutional portfolios follow a similar multi-ETF allocation strategy.

iShares vs Other ETF Providers

Although iShares dominates the ETF market, it is not the only major provider.

Other large ETF issuers include:

  • Vanguard

  • State Street Global Advisors

  • Invesco

  • Schwab

Each provider offers ETFs tracking many of the same indexes.

For example:

  • IVV competes with VOO and SPY as S&P 500 ETFs.

  • AGG competes with BND in the bond ETF category.

The differences between these funds are often small, typically involving expense ratios, liquidity, and tracking accuracy.

The Structural Advantage of Large ETFs

One of the key advantages of large ETFs is scale.

When an ETF manages hundreds of billions of dollars in assets, it benefits from:

  • tighter bid-ask spreads

  • efficient trading

  • stronger tracking of the underlying index

These factors make large ETFs particularly attractive for long-term investors who prioritize stability and efficiency.

Many of the largest ETFs globally belong to the iShares family.

Risks Investors Should Understand

Despite their popularity, ETFs are not risk-free.

Even diversified ETFs can decline significantly during market downturns.

Key risks include:

Market Risk

Equity ETFs will fall during bear markets. For example, the S&P 500 declined more than 50% during the 2008 financial crisis.

Interest Rate Risk

Bond ETFs are sensitive to interest rate changes. Rising rates can cause bond prices to fall.

Concentration Risk

Many index ETFs have become heavily concentrated in large technology companies. This means a small group of stocks can influence overall performance.

Understanding these structural risks is essential for long-term investors.

Why iShares Remains a Global ETF Leader

iShares continues to dominate the ETF industry for several reasons.

First, BlackRock’s global scale provides deep institutional support. The firm manages assets for governments, pension funds, and financial institutions worldwide.

Second, the iShares ETF lineup offers extremely broad market coverage, from core index funds to specialized investment strategies.

Finally, iShares ETFs are widely integrated into financial systems, including:

  • retirement accounts

  • robo-advisors

  • institutional asset allocation models

These structural advantages reinforce the position of iShares as a central player in global capital markets.

Conclusion

iShares ETFs have become foundational tools for modern investors. Managed by BlackRock, these funds provide efficient access to major financial markets around the world.

Among the many iShares products available, several stand out as essential building blocks for long-term portfolios. Funds such as IVV, IXUS, AGG, EEM, and IWM offer exposure to large U.S. companies, international stocks, emerging markets, small-cap equities, and bonds.

By combining these ETFs thoughtfully, investors can construct diversified portfolios that span multiple regions, asset classes, and economic cycles.

While no investment strategy eliminates risk, the structure of large, low-cost index ETFs has made them one of the most widely used tools in long-term investing.

Understanding how these funds work—and how they fit together—can help investors build portfolios designed to grow steadily over time.

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