RSPvsSIZEETF Comparison
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Invesco S&P 500® Equal Weight ETF (RSP) and iShares MSCI USA Size Factor ETF (SIZE) belong to the same industry segment: US Large Cap. Both ETFs have the same top 3 sector exposures: Finance, Technology and Industrials. RSP is more expensive with a Total Expense Ratio (TER) of 0.2%, versus 0.15% for SIZE. RSP is up 14.39% year-to-date (YTD) with +$13.41B in YTD flows. SIZE performs worse with 12.2% YTD performance, and -$556K in YTD flows. Run a side-by-side ETF comparison of RSP and SIZE 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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RSP vs SIZE performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/23/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | RSP SIZE | +2.47%+1.60% | +2.56%+2.04% | +14.39%+12.20% | +15.32%+12.57% | +66.90%+66.82% | +48.11%+42.47% |
| Flows | RSP SIZE | +$328M- | +$1.40B- | +$13.41B-$556K | +$15.11B+$16M | +$32.82B-$9M | +$46.02B-$299M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | RSP SIZE | +10.38%+10.80% | +11.51%+12.12% | +13.83%+14.39% | +16.10%+17.06% |
| Max drawdown | RSP SIZE | -6.29%-6.56% | -7.88%-7.92% | -17.79%-18.57% | -21.48%-24.05% |
| Max drawdown duration | RSP SIZE | 68d71d | 65d49d | 220d219d | 752d820d |
Trading data
RSP | SIZE | |
Last sale 10/23/2026 at 1:30 PM | $216.54 | $179.64 |
| Previous close 10/22/2026 | $218.22 | $180.88 |
| Consolidated volume 10/22/2026 | ||
| 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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RSP | SIZE | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/23/2026 at 1:30 PM
Live
Closed
RSP | SIZE | |
|---|---|---|
| Last price | $216.54 | $179.64 |
| 1D performance | -0.77% | -0.69% |
| AuM | $99.34 B | $430.97 M |
| E/R | 0.2% | 0.15% |
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Exposure
Countries
RSP
USA
95.45%
Other
4.55%
SIZE
USA
94.8%
Other
5.2%
Sectors
RSP
Finance
20.85%
Technology
15.45%
Industrials
13.72%
Healthcare
12.88%
Consumer Non-Cycl.
7.45%
Other
29.66%
SIZE
Finance
21.7%
Technology
17.25%
Industrials
13.27%
Healthcare
12%
Consumer Non-Cycl.
7.12%
Other
28.67%
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Diversification
RSP
Total weight of top 15 holdings out of 15
4.52%
SIZE
Total weight of top 15 holdings out of 15
4.85%
Top 15 holdings
Data as of August 31, 2026
RSP
Moderna, Inc.
0.58%
Veeva Systems, Inc.
0.32%
Zebra Technologies Corp.
0.31%
Charles River Laboratories International, Inc.
0.30%
DoorDash, Inc.
0.29%
PayPal Holdings, Inc.
0.28%
Global Payments, Inc.
0.28%
Salesforce, Inc.
0.28%
Expedia Group, Inc.
0.27%
Palo Alto Networks, Inc.
0.27%
IQVIA Holdings, Inc.
0.27%
Palantir Technologies, Inc.
0.27%
Airbnb, Inc.
0.27%
Newmont Corp.
0.27%
CrowdStrike Holdings, Inc.
0.26%
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%
Frequently asked questions about RSP and SIZE
How have the RSP and SIZE ETFs performed in 2026?
As of October 23, 2026, RSP is up 14.39% year-to-date (YTD), while SIZE has returned 12.2%. That puts RSP better performer ahead so far this year.
Which ETF is attracting more investor money: RSP or SIZE?
Year-to-date, the RSP ETF saw +$13.41B in flows, compared to -$556K for SIZE.
Which ETF is more volatile: RSP or SIZE?
Over the past year, RSP had a volatility of 11.51%, while SIZE experienced 12.12%.
Which ETF is bigger: RSP or SIZE?
As of October 23, 2026, RSP holds $99.34 B in assets under management (AUM), while SIZE manages $430.97 M.
What sectors do the RSP and SIZE ETFs invest in?
RSP leans toward sectors like Finance, Technology and Industrials. Meanwhile, SIZE focuses on Finance, Technology and Industrials.
What are the top holdings of the RSP ETF and SIZE ETF?
RSP top holdings include Moderna, Inc., Veeva Systems, Inc. and Zebra Technologies Corp.. SIZE holds in its top three: Atlassian Corp., Okta, Inc. and Equity Residential.
Which ETF is more diversified: RSP or SIZE?
RSP holds 503 securities with 4.52% of its assets in the top 15. SIZE has 516 securities and a top 15 weight of 4.85%.
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Latest news about RSP & SIZE
Avoid S&P 500 Concentration Risk with These Two ETFs
July 28, 2026
RSP
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