XLUvsIDUETF Comparison
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State Street Utilities Select Sector SPDR ETF (XLU) and iShares U.S. Utilities ETF (IDU) belong to the same industry segment: US Utilities. Both ETFs have the same top 3 sector exposures: and Utilities. XLU is less expensive with a Total Expense Ratio (TER) of 0.08%, versus 0.38% for IDU. XLU is up 9.09% year-to-date (YTD) with +$267M in YTD flows. IDU performs better with 9.32% YTD performance, and -$368M in YTD flows. Run a side-by-side ETF comparison of XLU 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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XLU vs IDU performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 07/22/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | XLU IDU | +2.77%+1.64% | +3.10%+0.83% | +9.09%+9.32% | +11.03%+11.18% | +47.27%+48.43% | +64.56%+62.80% |
| Flows | XLU IDU | +$412M-$23M | -$729M-$302M | +$267M-$368M | +$1.25B-$136M | +$2.63B+$86M | +$6.53B+$156M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | XLU IDU | +18.26%+16.45% | +15.14%+14.30% | +16.46%+15.48% | +17.41%+16.59% |
| Max drawdown | XLU IDU | -8.03%-7.78% | -9.19%-9.16% | -17.23%-16.60% | -25.30%-24.11% |
| Max drawdown duration | XLU IDU | 83d85d | 120d145d | 273d245d | 688d610d |
Trading data
XLU | IDU | |
Last sale 7/24/2026 at 1:30 PM | $46.29 | $117.16 |
| Previous close 07/23/2026 | $46.19 | $117.03 |
| Consolidated volume 07/23/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of June 30, 2026
1-year trailing difference
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XLU | 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 7/24/2026 at 1:30 PM
Live
Closed
XLU | IDU | |
|---|---|---|
| Last price | $46.29 | $117.16 |
| 1D performance | +0.22% | +0.11% |
| AuM | $23.65 B | $1.41 B |
| E/R | 0.08% | 0.38% |
Characteristics
XLU | IDU | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | State Street Investment Management | iShares |
| Benchmark | S&P Utilities Select Sector Index | Russell 1000 Utilities RIC 22.5/45 Capped Index |
| N° of holdings | 31 | 46 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | December 16, 1998 | June 12, 2000 |
| ESG | No | No |
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Exposure
Countries
XLU
USA
100.07%
Other
-0.07%
IDU
USA
99.97%
Other
0.03%
Sectors
XLU
Utilities
100.07%
Other
-0.07%
IDU
Utilities
89.85%
Business Services
9.08%
Other
1.07%
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Diversification
XLU
Total weight of top 15 holdings out of 15
72.18%
IDU
Total weight of top 15 holdings out of 15
65.02%
Top 15 holdings
Data as of June 30, 2026
XLU
NextEra Energy, Inc.
12.94%
The Southern Co.
7.63%
Duke Energy Corp.
6.98%
Constellation Energy Corp.
5.61%
American Electric Power Co., Inc.
5.26%
Sempra
4.28%
Dominion Energy, Inc.
4.25%
Entergy Corp.
3.72%
Vistra Corp.
3.55%
Xcel Energy, Inc.
3.54%
Exelon Corp.
3.37%
Consolidated Edison, Inc.
2.88%
Public Service Enterprise Group, Inc.
2.86%
WEC Energy Group, Inc.
2.69%
PG&E Corp.
2.62%
IDU
NextEra Energy, Inc.
11.08%
The Southern Co.
6.53%
Duke Energy Corp.
5.96%
Waste Management, Inc.
5.02%
Constellation Energy Corp.
4.82%
American Electric Power Co., Inc.
4.51%
Sempra
3.67%
Dominion Energy, Inc.
3.63%
Vistra Corp.
3.23%
Entergy Corp.
3.18%
Xcel Energy, Inc.
3.03%
Exelon Corp.
2.89%
Republic Services, Inc.
2.56%
Consolidated Edison, Inc.
2.47%
Public Service Enterprise Group, Inc.
2.45%
Frequently asked questions about XLU and IDU
How have the XLU and IDU ETFs performed in 2026?
As of July 22, 2026, XLU is up 9.09% year-to-date (YTD), while IDU has returned 9.32%. That puts IDU better performer ahead so far this year.
Which ETF is attracting more investor money: XLU or IDU?
Year-to-date, the XLU ETF saw +$267M in flows, compared to -$368M for IDU.
Which ETF is more volatile: XLU or IDU?
Over the past year, XLU had a volatility of 15.14%, while IDU experienced 14.3%.
Which ETF is bigger: XLU or IDU?
As of July 22, 2026, XLU holds $23.65 B in assets under management (AUM), while IDU manages $1.41 B.
What sectors do the XLU and IDU ETFs invest in?
XLU leans toward sectors like Utilities. Meanwhile, IDU focuses on Utilities and Business Services.
What are the top holdings of the XLU ETF and IDU ETF?
XLU top holdings include NextEra Energy, Inc., The Southern Co. and Duke Energy Corp.. IDU holds in its top three: NextEra Energy, Inc., The Southern Co. and Duke Energy Corp..
Which ETF is more diversified: XLU or IDU?
XLU holds 31 securities with 72.18% of its assets in the top 15. IDU has 46 securities and a top 15 weight of 65.02%.
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