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. RSPU's top 1 sector exposures are Utilities. In contrast, IDU's top sector exposures are Utilities, Business Services and Energy. RSPU is more expensive with a Total Expense Ratio (TER) of 0.4%, versus 0.37% for IDU. RSPU is up 5.4% year-to-date (YTD) with +$11M in YTD flows. IDU performs worse with 4.31% YTD performance, and -$277M 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 11/03/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | RSPU IDU | +8.83%+8.70% | -1.54%-0.64% | +5.40%+4.31% | +2.63%+1.69% | +57.97%+54.27% | +64.75%+50.61% |
| Flows | RSPU IDU | +$4M-$58M | +$1M-$23M | +$11M-$277M | +$17M-$69M | +$134M+$208M | +$186M+$251M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | RSPU IDU | +15.09%+14.51% | +15.21%+14.99% | +15.53%+15.13% | +17.05%+16.67% |
| Max drawdown | RSPU IDU | -11.20%-10.11% | -15.81%-15.29% | -15.81%-15.29% | -21.97%-24.11% |
| Max drawdown duration | RSPU IDU | 92d79d | 247d247d | 247d247d | 610d610d |
Trading data
RSPU | IDU | |
Last sale 11/4/2026 at 5:20 PM | $77.32 | $111.44 |
| Previous close 11/03/2026 | $77.22 | $111.02 |
| Consolidated volume 11/03/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of October 30, 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 11/4/2026 at 5:20 PM
Live
Closed
RSPU | IDU | |
|---|---|---|
| Last price | $77.32 | $111.44 |
| 1D performance | +0.13% | +0.38% |
| AuM | $528.93 M | $1.43 B |
| E/R | 0.4% | 0.37% |
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 | 47 |
| 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
99.85%
Other
0.15%
Sectors
RSPU
Utilities
100%
Other
0%
IDU
Utilities
88.63%
Business Services
10.11%
Other
1.26%
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Diversification
RSPU
Total weight of top 15 holdings out of 15
49.58%
IDU
Total weight of top 15 holdings out of 15
65.59%
Top 15 holdings
Data as of September 30, 2026
RSPU
The AES Corp.
3.51%
Evergy, Inc.
3.36%
Consolidated Edison, Inc.
3.35%
WEC Energy Group, Inc.
3.34%
American Electric Power Co., Inc.
3.32%
Atmos Energy Corp.
3.30%
Duke Energy Corp.
3.30%
Pinnacle West Capital Corp.
3.29%
NiSource, Inc.
3.28%
Ameren Corp.
3.27%
The Southern Co.
3.26%
Alliant Energy Corp.
3.26%
FirstEnergy Corp.
3.26%
PPL Corp.
3.25%
Dominion Energy, Inc.
3.24%
IDU
NextEra Energy, Inc.
10.80%
The Southern Co.
6.52%
Duke Energy Corp.
6.07%
Constellation Energy Corp.
5.57%
Waste Management, Inc.
5.19%
American Electric Power Co., Inc.
4.42%
Dominion Energy, Inc.
3.64%
Sempra
3.48%
Vistra Corp.
3.18%
Entergy Corp.
3.16%
Xcel Energy, Inc.
3.01%
Republic Services, Inc.
2.85%
Exelon Corp.
2.83%
Consolidated Edison, Inc.
2.57%
Public Service Enterprise Group, Inc.
2.30%
Frequently asked questions about RSPU and IDU
How have the RSPU and IDU ETFs performed in 2026?
As of November 3, 2026, RSPU is up 5.4% year-to-date (YTD), while IDU has returned 4.31%. 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 +$11M in flows, compared to -$277M for IDU.
Which ETF is more volatile: RSPU or IDU?
Over the past year, RSPU had a volatility of 15.21%, while IDU experienced 14.99%.
Which ETF is bigger: RSPU or IDU?
As of November 3, 2026, RSPU holds $528.93 M in assets under management (AUM), while IDU manages $1.43 B.
What sectors do the RSPU and IDU ETFs invest in?
RSPU leans toward sectors like Utilities. Meanwhile, IDU focuses on Utilities and Business Services.
What are the top holdings of the RSPU ETF and IDU ETF?
RSPU top holdings include The AES Corp., Evergy, Inc. and Consolidated Edison, Inc.. IDU holds in its top three: NextEra Energy, Inc., The Southern Co. and Duke Energy Corp..
Which ETF is more diversified: RSPU or IDU?
RSPU holds 31 securities with 49.58% of its assets in the top 15. IDU has 47 securities and a top 15 weight of 65.59%.
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