RSPUvsIDUETF Comparison
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Invesco S&P 500® Equal Weight Utilities ETF (RSPU) belongs to the US Large Cap segment. iShares U.S. Utilities ETF (IDU) is part of the US Utilities segment. Both ETFs have the same top 3 sector exposures: and Utilities. RSPU is more expensive with a Total Expense Ratio (TER) of 0.4%, versus 0.38% for IDU. RSPU is up 8.41% year-to-date (YTD) with +$34M in YTD flows. IDU performs worse with 7.25% YTD performance, and -$171M in YTD flows. Run a side-by-side ETF comparison of RSPU and IDU 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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RSPU vs IDU performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 04/29/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | RSPU IDU | -0.50%-0.53% | +6.09%+5.52% | +8.41%+7.25% | +18.04%+15.95% | +51.10%+45.61% | +70.92%+59.31% |
| Flows | RSPU IDU | +$24M-$18M | +$46M+$73M | +$34M-$171M | +$74M-$26M | +$87M+$206M | +$253M+$361M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | RSPU IDU | +16.23%+16.28% | +13.57%+13.46% | +15.63%+15.25% | +16.86%+16.51% |
| Max drawdown | RSPU IDU | -6.57%-6.33% | -7.70%-8.38% | -16.39%-16.77% | -21.97%-24.11% |
| Max drawdown duration | RSPU IDU | 59d59d | 119d120d | 257d321d | 610d610d |
Trading data
RSPU | IDU | |
Last sale 4/30/2026 at 1:30 PM | $82.16 | $118.35 |
| Previous close 04/29/2026 | $80.53 | $115.53 |
| Consolidated volume 04/29/2026 | ||
| 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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RSPU | IDU | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 4/30/2026 at 1:30 PM
Live
Closed
RSPU | IDU | |
|---|---|---|
| Last price | $82.16 | $118.35 |
| 1D performance | +2.02% | +2.44% |
| AuM | $574.77 M | $1.58 B |
| E/R | 0.4% | 0.38% |
Characteristics
RSPU | IDU | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | Invesco | iShares |
| Benchmark | S&P 500 Equal Weight Utilities & Telecommunications Index | Russell 1000 Utilities RIC 22.5/45 Capped Index |
| N° of holdings | 31 | 42 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | November 1, 2006 | June 12, 2000 |
| ESG | No | No |
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Exposure
Countries
RSPU
USA
100%
Other
-0%
IDU
USA
99.64%
Other
0.36%
Sectors
RSPU
Utilities
100%
Other
-0%
IDU
Utilities
89.54%
Industrials
9.03%
Other
1.43%
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Diversification
RSPU
Total weight of top 15 holdings out of 15
49.11%
IDU
Total weight of top 15 holdings out of 15
66.06%
Top 15 holdings
Data as of March 31, 2026
RSPU
ENTERGY
3.44%
SEMPRA ENERGY
3.36%
AMERICAN WATER WORKS
3.31%
WEC ENERGY GROUP INC
3.28%
CMS ENERGY
3.27%
CONSTELLATION ENERGY CORP
3.26%
PPL
3.25%
DUKE ENERGY
3.25%
CONSOLIDATED EDISON
3.25%
EVERGY
3.25%
NEXTERA ENERGY
3.24%
ALLIANT ENERGY
3.24%
AMEREN
3.23%
NRG ENERGY
3.23%
ATMOS ENERGY
3.23%
IDU
NEXTERA ENERGY
11.81%
SOUTHERN
6.48%
DUKE ENERGY
6.21%
CONSTELLATION ENERGY CORP
5.31%
WASTE MANAGEMENT
5.18%
AMERICAN ELECTRIC POWER
4.28%
SEMPRA ENERGY
3.87%
DOMINION ENERGY
3.22%
VISTRA CORP
3.10%
ENTERGY
3.06%
EXELON CORP
3.02%
XCEL ENERGY
2.87%
REPUBLIC SVCS
2.71%
CONSOLIDATED EDISON
2.49%
PUBLIC SRVCE ENT
2.46%
Frequently asked questions about RSPU and IDU
How have the RSPU and IDU ETFs performed in 2026?
As of April 29, 2026, RSPU is up 8.41% year-to-date (YTD), while IDU has returned 7.25%. That puts RSPU better performer ahead so far this year.
Which ETF is attracting more investor money: RSPU or IDU?
Year-to-date, the RSPU ETF saw +$34M in flows, compared to -$171M for IDU.
Which ETF is more volatile: RSPU or IDU?
Over the past year, RSPU had a volatility of 13.57%, while IDU experienced 13.46%.
Which ETF is bigger: RSPU or IDU?
As of April 29, 2026, RSPU holds $574.77 M in assets under management (AUM), while IDU manages $1.58 B.
What sectors do the RSPU and IDU ETFs invest in?
RSPU leans toward sectors like Utilities. Meanwhile, IDU focuses on Utilities and Industrials.
What are the top holdings of the RSPU ETF and IDU ETF?
RSPU top holdings include ENTERGY, SEMPRA ENERGY and AMERICAN WATER WORKS. IDU holds in its top three: NEXTERA ENERGY, SOUTHERN and DUKE ENERGY.
Which ETF is more diversified: RSPU or IDU?
RSPU holds 31 securities with 49.11% of its assets in the top 15. IDU has 45 securities and a top 15 weight of 66.06%.
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