SIZEvsVOOETF Comparison
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iShares MSCI USA Size Factor ETF (SIZE) and Vanguard S&P 500 ETF (VOO) belong to the same industry segment: US Large Cap. SIZE's top 3 sector exposures are Information Technology, Industrials and Financials. In contrast, VOO's top sector exposures are Information Technology, Financials and Communication Services. SIZE is more expensive with a Total Expense Ratio (TER) of 0.15%, versus 0.03% for VOO. SIZE is up 5.03% year-to-date (YTD) with -$452K in YTD flows. VOO performs worse with 4.66% YTD performance, and +$45.39B in YTD flows. Run a side-by-side ETF comparison of SIZE and VOO below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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SIZE vs VOO performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 04/27/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SIZE VOO | +8.35%+12.61% | +1.76%+2.60% | +5.03%+4.66% | +21.34%+30.69% | +52.85%+78.27% | +44.35%+83.17% |
| Flows | SIZE VOO | +$8M+$25.49B | -$452K+$29.68B | -$452K+$45.39B | +$31M+$130.83B | -$33M+$334.50B | -$715M+$408.47B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SIZE VOO | +14.49%+15.26% | +12.59%+12.47% | +14.67%+14.83% | +17.10%+17.10% |
| Max drawdown | SIZE VOO | -7.92%-8.89% | -7.92%-8.90% | -18.57%-18.75% | -24.05%-24.52% |
| Max drawdown duration | SIZE VOO | 49d75d | 49d76d | 219d126d | 820d708d |
Trading data
SIZE | VOO | |
Last sale 4/28/2026 at 7:36 PM | $167.89 | $654.61 |
| Previous close 04/28/2026 | $169.34 | $654.26 |
| Consolidated volume 04/28/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of March 31, 2026
1-year trailing difference
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SIZE | VOO | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 4/28/2026 at 7:36 PM
Live
Closed
SIZE | VOO | |
|---|---|---|
| Last price | $167.89 | $654.61 |
| 1D performance | -0.86% | +0.05% |
| AuM | $406.03 M | $915.17 B |
| E/R | 0.15% | 0.03% |
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Exposure
Countries
SIZE
USA
93.01%
Other
6.99%
VOO
USA
96.81%
Other
3.19%
Sectors
SIZE
Information Techn.
16.23%
Industrials
15.4%
Financials
12.22%
Health Care
9.66%
Consumer Discreti.
9.26%
Other
37.23%
VOO
Information Techn.
33.92%
Financials
10.25%
Communication Ser.
10.24%
Consumer Discreti.
10.02%
Health Care
9.33%
Industrials
8.33%
Other
17.91%
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Diversification
SIZE
Total weight of top 15 holdings out of 15
4.62%
VOO
Total weight of top 15 holdings out of 15
42.44%
Top 15 holdings
Data as of March 31, 2026
SIZE
DOW INC
0.37%
LYONDELLBASELL INDUSTRIES
0.37%
CIENA
0.36%
ECHOSTAR
0.33%
TERADYNE
0.32%
WESTERN DIGITAL
0.31%
CF INDUSTRIES HOLDINGS
0.31%
KEYSIGHT TECHNOLOGIES
0.29%
OCCIDENTAL U
0.29%
CORNING
0.28%
HALLIBURTON
0.28%
TARGA RESOURCS
0.28%
ENTEGRIS
0.28%
DEVON ENERGY
0.28%
TEXAS PACIFIC LAND CORP
0.28%
VOO
NVIDIA
7.58%
APPLE
6.66%
MICROSOFT-T
4.92%
AMAZON.COM INC
3.64%
ALPHABET INC-CL
2.99%
BROADCOM LIMITED
2.62%
ALPHABET INC-CL
2.40%
META PLATFORMS
2.24%
TESLA
1.87%
BERKSHIRE HATHWAY
1.57%
JPMORGAN CHASE
1.34%
LILLY
1.30%
EXXON
1.27%
JOHNSON&JOHNSON
1.05%
WALMART INC
0.97%
Frequently asked questions about SIZE and VOO
How have the SIZE and VOO ETFs performed in 2026?
As of April 27, 2026, SIZE is up 5.03% year-to-date (YTD), while VOO has returned 4.66%. That puts SIZE better performer ahead so far this year.
Which ETF is attracting more investor money: SIZE or VOO?
Year-to-date, the SIZE ETF saw -$452K in flows, compared to +$45.39B for VOO.
Which ETF is more volatile: SIZE or VOO?
Over the past year, SIZE had a volatility of 12.59%, while VOO experienced 12.47%.
Which ETF is bigger: SIZE or VOO?
As of April 27, 2026, SIZE holds $406.03 M in assets under management (AUM), while VOO manages $915.17 B.
What sectors do the SIZE and VOO ETFs invest in?
SIZE leans toward sectors like Information Technology, Industrials and Financials. Meanwhile, VOO focuses on Information Technology, Financials and Communication Services.
What are the top holdings of the SIZE ETF and VOO ETF?
SIZE top holdings include DOW INC, LYONDELLBASELL INDUSTRIES and CIENA. VOO holds in its top three: NVIDIA, APPLE and MICROSOFT-T.
Which ETF is more diversified: SIZE or VOO?
SIZE holds 538 securities with 4.62% of its assets in the top 15. VOO has 503 securities and a top 15 weight of 42.44%.
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