SIZEvsFEXETF Comparison
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iShares MSCI USA Size Factor ETF (SIZE) belongs to the US Large Cap segment. First Trust Large Cap Core AlphaDEX Fund ETF (FEX) is part of the US Multi-Factor segment. Both ETFs have the same top 3 sector exposures: Finance, Technology and Industrials. SIZE is less expensive with a Total Expense Ratio (TER) of 0.15%, versus 0.57% for FEX. SIZE is up 13.91% year-to-date (YTD) with -$556K in YTD flows. FEX performs better with 17.14% YTD performance, and +$4M in YTD flows. Run a side-by-side ETF comparison of SIZE and FEX 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 FEX performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/29/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SIZE FEX | +4.14%+3.43% | +2.18%+1.03% | +13.91%+17.14% | +15.23%+18.24% | +71.63%+84.36% | +45.25%+62.28% |
| Flows | SIZE FEX | -+$7M | -+$7M | -$556K+$4M | +$16M-$14M | -$9M-$136M | -$299M-$154M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SIZE FEX | +10.42%+10.22% | +12.08%+12.87% | +14.36%+14.71% | +17.05%+16.85% |
| Max drawdown | SIZE FEX | -6.56%-6.74% | -7.92%-6.74% | -18.57%-19.51% | -24.05%-21.53% |
| Max drawdown duration | SIZE FEX | 77d73d | 49d73d | 219d232d | 820d757d |
Trading data
SIZE | FEX | |
Last sale 10/29/2026 at 1:30 PM | $182.36 | $138.46 |
| Previous close 10/29/2026 | $180.45 | $137.89 |
| Consolidated volume 10/29/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of September 30, 2026
1-year trailing difference
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SIZE | FEX | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/29/2026 at 1:30 PM
Live
Closed
SIZE | FEX | |
|---|---|---|
| Last price | $182.36 | $138.46 |
| 1D performance | +1.06% | +0.42% |
| AuM | $437.53 M | $1.60 B |
| E/R | 0.15% | 0.57% |
Characteristics
SIZE | FEX | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | iShares | First Trust |
| Benchmark | MSCI USA Low Size Index | NASDAQ AlphaDEX Large Cap Core Index |
| N° of holdings | 512 | 372 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | April 16, 2013 | May 8, 2007 |
| ESG | No | No |
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Exposure
Countries
SIZE
USA
94.8%
Other
5.2%
FEX
USA
94.16%
Other
5.84%
Sectors
SIZE
Finance
21.7%
Technology
17.25%
Industrials
13.27%
Healthcare
12%
Consumer Non-Cycl.
7.12%
Other
28.67%
FEX
Finance
20.76%
Technology
17.34%
Industrials
14.25%
Healthcare
9.9%
Energy
7.35%
Other
30.4%
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Diversification
SIZE
Total weight of top 15 holdings out of 15
4.85%
FEX
Total weight of top 15 holdings out of 15
8.51%
Top 15 holdings
Data as of August 31, 2026
SIZE
Atlassian Corp.
0.42%
Okta, Inc.
0.39%
Equity Residential
0.37%
SharkNinja, Inc.
0.36%
Snowflake, Inc.
0.35%
Dell Technologies, Inc.
0.34%
Veeva Systems, Inc.
0.33%
Natera, Inc.
0.31%
Hewlett Packard Enterprise Co.
0.29%
NetApp, Inc.
0.29%
Illumina, Inc.
0.28%
Genuine Parts Co.
0.28%
Workday, Inc.
0.28%
Toast, Inc.
0.28%
IQVIA Holdings, Inc.
0.28%
FEX
Cognizant Technology Solutions Corp.
0.73%
Accenture Plc
0.68%
ConocoPhillips
0.59%
Regeneron Pharmaceuticals, Inc.
0.59%
Super Micro Computer, Inc.
0.56%
AT&T, Inc.
0.56%
Global Payments, Inc.
0.56%
Phillips 66
0.54%
PayPal Holdings, Inc.
0.54%
Devon Energy Corp.
0.53%
Pfizer Inc.
0.53%
General Mills, Inc.
0.53%
Verizon Communications, Inc.
0.53%
Zimmer Biomet Holdings, Inc.
0.52%
Copart, Inc.
0.52%
Frequently asked questions about SIZE and FEX
How have the SIZE and FEX ETFs performed in 2026?
As of October 29, 2026, SIZE is up 13.91% year-to-date (YTD), while FEX has returned 17.14%. That puts FEX better performer ahead so far this year.
Which ETF is attracting more investor money: SIZE or FEX?
Year-to-date, the SIZE ETF saw -$556K in flows, compared to +$4M for FEX.
Which ETF is more volatile: SIZE or FEX?
Over the past year, SIZE had a volatility of 12.08%, while FEX experienced 12.87%.
Which ETF is bigger: SIZE or FEX?
As of October 29, 2026, SIZE holds $437.53 M in assets under management (AUM), while FEX manages $1.60 B.
What sectors do the SIZE and FEX ETFs invest in?
SIZE leans toward sectors like Finance, Technology and Industrials. Meanwhile, FEX focuses on Finance, Technology and Industrials.
What are the top holdings of the SIZE ETF and FEX ETF?
SIZE top holdings include Atlassian Corp., Okta, Inc. and Equity Residential. FEX holds in its top three: Cognizant Technology Solutions Corp., Accenture Plc and ConocoPhillips.
Which ETF is more diversified: SIZE or FEX?
SIZE holds 516 securities with 4.85% of its assets in the top 15. FEX has 372 securities and a top 15 weight of 8.51%.
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Latest news about SIZE & FEX
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