What are the main similarities and differences between IWB and VOO?

IWB tracks the Russell 1000 Index, including large- and mid-cap stocks, with a 0.15% expense ratio and $48.9 billion in assets. Its inception date is 15 May 2000, and its dividend yield is 0.90%. VOO tracks the S&P 500, focusing on large-cap firms, with a 0.03% expense ratio, $1.08 trillion in assets, a 1.03% yield, and an inception date of 7 September 2010.

What is the difference between the Russell 1000 and S&P 500 indices?

The S&P 500 tracks 500 large-cap US firms, while the Russell 1000 covers approximately 1,000 stocks, including 20–30% in mid-caps. Mid-caps have historically provided higher growth potential but increased volatility. This results in broader diversification in IWB versus a more concentrated exposure to mega-cap companies in VOO.

Can you explain the expense ratios and what they mean for IWB and VOO?

The expense ratio is the fund’s annual management fee. VOO charges 0.03%, and IWB charges 0.15%. For a $10,000 investment, the fee is $3 for VOO and $15 for IWB. Lower expense ratios reduce the amount investors pay for fund management.

How do the expense ratios of IWB and VOO compare, and what does the fee difference mean over time?

VOO’s expense ratio is 0.03%, while IWB’s is 0.15%, resulting in a 0.12% difference. Over 20 years, assuming a $10,000 initial investment and ignoring other factors, VOO would incur $60 in fees versus $300 for IWB, making VOO significantly cheaper over time. However, actual returns depend on performance and market conditions.

How do the top holdings of IWB and VOO compare?

The top 10 holdings in both funds are NVDA, AAPL, MSFT, AMZN, GOOGL, AVGO, GOOG, META, MU, and TSLA. In VOO, NVDA has an 8.08% weighting, compared to 7.36% in IWB. These similarities suggest comparable sector and company exposures, though VOO’s slightly heavier NVDA holding could increase sensitivity to this stock.

Do IWB and VOO have similar dividend yields?

IWB has a dividend yield of 0.90%, while VOO’s is 1.03%. This means that, based on the data, VOO provides slightly more income per dollar invested. These differences might be due to the inclusion of mid-cap stocks in IWB, which typically have lower dividends.

Which fund is better suited for long-term growth?

Both funds provide exposure to US large-cap stocks, with IWB including mid-cap stocks for broader diversification, whereas VOO focuses exclusively on the S&P 500. Growth depends on market performance, and IWB’s mid-cap exposure may offer higher potential due to the historical growth of smaller firms.

Which fund is better suited for income-focused investors?

VOO offers a higher dividend yield of 1.03% compared to IWB’s 0.90%, making it more suitable for income-focused investors. This slight yield difference reflects the inclusion of mid-cap stocks in IWB, which tend to provide lower dividends. Both funds reinvest dividends by default.

How do the inception dates and assets under management of IWB and VOO affect their suitability?

IWB, launched on 15 May 2000, has over two decades of performance history, while VOO began on 7 September 2010, providing less long-term data. VOO’s $1.08 trillion in assets ensures high liquidity, whereas IWB’s $48.9 billion is sufficient but smaller. Investors preferring historical consistency may choose IWB, while those needing liquidity may lean toward VOO.

How do IWB and VOO track their respective indices?

IWB tracks the Russell 1000, which includes both large and mid-cap stocks, with the mid-cap portion contributing approximately 20–30% of the index. VOO tracks the S&P 500, which is exclusively large-cap stocks. As a result, IWB provides broader exposure to the US equity market, while VOO focuses on established mega-cap companies. Both aim to replicate their indices, though their specific compositions may differ.

Are sector weights available for IWB or VOO?

Sector weights are not available for either IWB or VOO in the data provided. To assess sector concentration, investors may need to consult the individual fund providers’ websites, which often disclose this information in monthly fact sheets. This transparency can help investors understand potential exposure to specific sectors.

What should I keep in mind when reading ETF comparisons?

When reading ETF comparisons, focus on key factors like expense ratios, index methodologies, holdings overlap, dividend yields, and fund size. These metrics provide insights into the fund’s structure and characteristics, but it is essential to recognise that performance history and fee structure alone cannot predict future outcomes. Always remember that this comparison is for educational purposes and does not constitute financial advice.

IWB vs VOO

Two funds, one decision: we compare cost, performance and what each ETF actually holds in September 2026.

Compare iShares Russell 1000 ETF (IWB) and S&P 500 Vanguard ETF (VOO) by reviewing expense ratios, top holdings, dividend yields and how each fund tracks its respective market. This side-by-side analysis highlights structural similarities and differences between the two large blend ETFs to help you understand their portfolio composition and cost profiles. Educational content, not financial advice.

Fund Snapshot

Key Fund Metrics

IWB

Metric

VOO

0.15%

Expense Ratio

0.03%

0.90%

Dividend Yield

1.03%

$48.94B

Net Assets

$1.08T

1,028

Holdings

516

May 15, 2000

Inception Date

Sep 7, 2010

–

Index Tracked

–

Large Blend

Fund Category

Large Blend

VOO costs about $12.00 less per year for every $10,000 invested.

Shared Top Holdings

Holding	IWB	VOO
NVDANVIDIA Corporation	7.36%	8.08%
AAPLApple Inc.	6.90%	7.03%
MSFTMicrosoft Corporation	5.20%	5.70%
AMZNAmazon.com, Inc.	3.49%	3.84%
GOOGLAlphabet Inc.	2.89%	3.01%
AVGOBroadcom Inc.	2.36%	2.65%
GOOGAlphabet Inc.	2.32%	2.40%
METAMeta Platforms, Inc.	2.08%	1.90%
MUMicron Technology, Inc.	1.62%	1.63%
TSLATesla, Inc.	1.51%	1.57%

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Investment Analysis

IWB

Pros

Launched in 2000, the fund offers over two decades of historical data for backtesting purposes.
IWB includes mid-cap exposure, which enhances diversification compared to strictly large-cap indices.
With $48.9 billion in assets, the fund provides sufficient liquidity for most institutional investors.

Considerations

The 0.15% expense ratio is five times higher than the benchmark competitor's fee.
Dividend yield is 0.90%, which is notably lower than the S&P 500 equivalent.
Tracked index methodology and sector weights are not available, limiting transparency for detailed analysis.

VOO

Pros

Vanguard's fund has an exceptionally low expense ratio of 0.03% for large-cap US equity exposure.
With $1.08 trillion in assets, the ETF offers robust liquidity and high trading volume capacity.
The dividend yield of 1.03% is higher than the Russell 1000 ETF, improving income potential.

Considerations

Concentration in top holdings like NVDA at 8.08% increases specific stock risk in the portfolio.
Inception in 2010 means the fund lacks the pre-2010 historical performance data of competitors.
The S&P 500 index methodology excludes small and mid-caps, limiting overall equity diversification.

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About IWB and VOO

IWB (IWB)

The iShares Russell 1000 ETF is a Large Blend fund designed to provide broad exposure to large-cap U.S. stocks. With net assets of approximately USD 48.94 billion and 1,028 holdings, it offers investors a diversified way to track the performance of the broader large-cap market. The fund has an expense ratio of 0.15%, making it a cost-effective option for those seeking wide market participation. Its current dividend yield stands at 0.90%. Since its inception on May 15, 2000, the fund has aimed to capture the growth potential of established companies across various sectors. Investors should note that values can rise and fall, and past performance does not guarantee future results.

VOO (VOO)

VOO is Vanguard’s exchange-traded fund designed to track the S&P 500 Index, offering broad exposure to about 500 of the largest publicly traded US companies. It aims to replicate the index’s performance minus fees by holding the same stocks in similar proportions, making it a straightforward, passive way to access large‑cap US equities. Investors commonly use VOO as a core holding for long‑term growth or as a simple building block in a diversified portfolio. It typically offers high liquidity and regular dividend distributions from underlying companies. As with any equity investment, VOO’s value can rise or fall with the market, and past performance is not a guide to future returns. Fees, trading costs and potential tracking error reduce returns slightly. This information is general and educational only and not personalised financial advice — consider your own circumstances or speak to a qualified adviser before investing.

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IWB vs VOO

Fund Snapshot