SIZEvsONEOETF Comparison
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iShares MSCI USA Size Factor ETF (SIZE) belongs to the US Large Cap segment. State Street SPDR Russell 1000 Momentum Focus ETF (ONEO) is part of the US Multi-Factor segment. SIZE's top 3 sector exposures are Finance, Technology and Industrials. In contrast, ONEO's top sector exposures are Industrials, Finance and Technology. SIZE is less expensive with a Total Expense Ratio (TER) of 0.15%, versus 0.2% for ONEO. SIZE is up 11.63% year-to-date (YTD) with -$556K in YTD flows. ONEO performs better with 19.21% YTD performance, and -$24M in YTD flows. Run a side-by-side ETF comparison of SIZE and ONEO 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 ONEO performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/11/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SIZE ONEO | -3.04%-2.81% | +2.33%+1.80% | +11.63%+19.21% | +12.50%+19.29% | +53.17%+63.93% | +45.96%+62.81% |
| Flows | SIZE ONEO | -+$2M | -+$2M | -$556K-$24M | +$16M-$73M | -$15M-$166M | -$271M-$319M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SIZE ONEO | +10.50%+10.26% | +12.28%+13.10% | +14.58%+15.19% | +17.12%+17.31% |
| Max drawdown | SIZE ONEO | -4.80%-4.61% | -7.92%-7.42% | -18.57%-19.59% | -24.05%-22.42% |
| Max drawdown duration | SIZE ONEO | 29d26d | 49d48d | 219d260d | 820d757d |
Trading data
SIZE | ONEO | |
Last sale 9/11/2026 at 1:30 PM | $179.22 | $153.16 |
| Previous close 09/11/2026 | $177.94 | $151.88 |
| Consolidated volume 09/11/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of August 31, 2026
1-year trailing difference
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SIZE | ONEO | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/11/2026 at 1:30 PM
Live
Closed
SIZE | ONEO | |
|---|---|---|
| Last price | $179.22 | $153.16 |
| 1D performance | +0.72% | +0.84% |
| AuM | $430.36 M | $30.64 M |
| E/R | 0.15% | 0.2% |
Characteristics
SIZE | ONEO | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | iShares | State Street Investment Management |
| Benchmark | MSCI USA Low Size Index | Russell 1000 Momentum Focused Factor Index |
| N° of holdings | 525 | 917 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | April 16, 2013 | December 2, 2015 |
| ESG | No | No |
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Exposure
Countries
SIZE
USA
94.33%
Other
5.67%
ONEO
USA
94.84%
Other
5.16%
Sectors
SIZE
Finance
21.9%
Technology
16.31%
Industrials
13.66%
Healthcare
11.31%
Consumer Non-Cycl.
7.29%
Other
29.52%
ONEO
Industrials
15.9%
Finance
15.32%
Technology
14.66%
Healthcare
11.55%
Consumer Non-Cycl.
8.16%
Non-Energy Materi.
7.9%
Other
26.51%
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Diversification
SIZE
Total weight of top 15 holdings out of 15
4.16%
ONEO
Total weight of top 15 holdings out of 15
8.03%
Top 15 holdings
Data as of July 31, 2026
SIZE
Snowflake, Inc.
0.32%
Okta, Inc.
0.31%
SharkNinja, Inc.
0.30%
Dell Technologies, Inc.
0.30%
Best Buy Co., Inc.
0.28%
International Paper Co.
0.28%
Illumina, Inc.
0.27%
Toast, Inc.
0.27%
NetApp, Inc.
0.27%
Dollar Tree, Inc.
0.27%
CDW Corp.
0.27%
Hewlett Packard Enterprise Co.
0.26%
Genuine Parts Co.
0.26%
United Airlines Holdings, Inc.
0.25%
Williams-Sonoma, Inc.
0.25%
ONEO
The Allstate Corp.
0.68%
Anglogold Ashanti Plc
0.67%
Archer-Daniels-Midland Co.
0.62%
Expedia Group, Inc.
0.59%
Delta Air Lines, Inc.
0.57%
CF Industries Holdings, Inc.
0.54%
Regeneron Pharmaceuticals, Inc.
0.54%
Zoom Communications, Inc.
0.52%
McKesson Corp.
0.50%
Edison International
0.49%
Ovintiv, Inc.
0.48%
TechnipFMC plc
0.47%
CVS Health Corp.
0.46%
Permian Resources Corp.
0.45%
Devon Energy Corp.
0.45%
Frequently asked questions about SIZE and ONEO
How have the SIZE and ONEO ETFs performed in 2026?
As of September 11, 2026, SIZE is up 11.63% year-to-date (YTD), while ONEO has returned 19.21%. That puts ONEO better performer ahead so far this year.
Which ETF is attracting more investor money: SIZE or ONEO?
Year-to-date, the SIZE ETF saw -$556K in flows, compared to -$24M for ONEO.
Which ETF is more volatile: SIZE or ONEO?
Over the past year, SIZE had a volatility of 12.28%, while ONEO experienced 13.1%.
Which ETF is bigger: SIZE or ONEO?
As of September 11, 2026, SIZE holds $430.36 M in assets under management (AUM), while ONEO manages $30.64 M.
What sectors do the SIZE and ONEO ETFs invest in?
SIZE leans toward sectors like Finance, Technology and Industrials. Meanwhile, ONEO focuses on Industrials, Finance and Technology.
What are the top holdings of the SIZE ETF and ONEO ETF?
SIZE top holdings include Snowflake, Inc., Okta, Inc. and SharkNinja, Inc.. ONEO holds in its top three: The Allstate Corp., Anglogold Ashanti Plc and Archer-Daniels-Midland Co..
Which ETF is more diversified: SIZE or ONEO?
SIZE holds 529 securities with 4.16% of its assets in the top 15. ONEO has 924 securities and a top 15 weight of 8.03%.
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Latest news about SIZE & ONEO
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