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 7.22% year-to-date (YTD) with +$857K in YTD flows. IDU performs worse with 5.03% YTD performance, and -$340M 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 06/18/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | RSPU IDU | +2.40%+1.63% | -2.78%-3.69% | +7.22%+5.03% | +16.46%+11.78% | +54.58%+47.75% | +74.21%+61.10% |
| Flows | RSPU IDU | -$12M-$95M | +$8M-$55M | +$857K-$340M | +$20M-$185M | +$45M+$78M | +$219M+$193M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | RSPU IDU | +17.24%+17.60% | +14.12%+14.04% | +15.82%+15.48% | +16.91%+16.57% |
| Max drawdown | RSPU IDU | -8.25%-8.43% | -8.46%-9.16% | -16.39%-16.72% | -21.97%-24.11% |
| Max drawdown duration | RSPU IDU | 70d70d | 109d109d | 257d247d | 610d610d |
Trading data
RSPU | IDU | |
Last sale 6/18/2026 at 1:30 PM | $79.53 | $112.49 |
| Previous close 06/18/2026 | $79.21 | $111.81 |
| Consolidated volume 06/18/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of May 29, 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 6/18/2026 at 1:30 PM
Live
Closed
RSPU | IDU | |
|---|---|---|
| Last price | $79.53 | $112.49 |
| 1D performance | +0.40% | +0.61% |
| AuM | $535.01 M | $1.38 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
99.69%
Other
0.31%
Sectors
RSPU
Utilities
100%
Other
-0%
IDU
Utilities
89.63%
Industrials
8.9%
Other
1.46%
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Diversification
RSPU
Total weight of top 15 holdings out of 15
49.88%
IDU
Total weight of top 15 holdings out of 15
66.45%
Top 15 holdings
Data as of April 30, 2026
RSPU
ENTERGY
3.51%
NRG ENERGY
3.47%
CONSTELLATION ENERGY CORP
3.37%
VISTRA CORP
3.37%
NISOURCE
3.35%
NEXTERA ENERGY
3.33%
PPL
3.31%
AMERICAN ELECTRIC POWER
3.31%
AMEREN
3.29%
ALLIANT ENERGY
3.29%
AES
3.27%
PINNACLE WEST
3.27%
WEC ENERGY GROUP INC
3.27%
ATMOS ENERGY
3.24%
EVERGY
3.24%
IDU
NEXTERA ENERGY
12.22%
SOUTHERN
6.38%
DUKE ENERGY
6.03%
CONSTELLATION ENERGY CORP
5.84%
WASTE MANAGEMENT
5.15%
AMERICAN ELECTRIC POWER
4.39%
SEMPRA ENERGY
3.71%
DOMINION ENERGY
3.29%
VISTRA CORP
3.20%
ENTERGY
3.15%
XCEL ENERGY
2.94%
EXELON CORP
2.78%
REPUBLIC SVCS
2.54%
PUBLIC SRVCE ENT
2.44%
CONSOLIDATED EDISON
2.40%
Frequently asked questions about RSPU and IDU
How have the RSPU and IDU ETFs performed in 2026?
As of June 18, 2026, RSPU is up 7.22% year-to-date (YTD), while IDU has returned 5.03%. 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 +$857K in flows, compared to -$340M for IDU.
Which ETF is more volatile: RSPU or IDU?
Over the past year, RSPU had a volatility of 14.12%, while IDU experienced 14.04%.
Which ETF is bigger: RSPU or IDU?
As of June 18, 2026, RSPU holds $535.01 M in assets under management (AUM), while IDU manages $1.38 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, NRG ENERGY and CONSTELLATION ENERGY CORP. 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 49.88% of its assets in the top 15. IDU has 45 securities and a top 15 weight of 66.45%.
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