IDUvsFXUETF Comparison
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iShares U.S. Utilities ETF (IDU) and First Trust Utilities AlphaDEX ETF (FXU) belong to the same industry segment: US Utilities. IDU's top 3 sector exposures are Utilities, Business Services and Energy. In contrast, FXU's top sector exposures are Utilities, Energy and Business Services. IDU is less expensive with a Total Expense Ratio (TER) of 0.37%, versus 0.61% for FXU. IDU is up 3.11% year-to-date (YTD) with -$294M in YTD flows. FXU performs better with 8.05% YTD performance, and -$1.11B in YTD flows. Run a side-by-side ETF comparison of IDU and FXU 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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IDU vs FXU performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/27/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IDU FXU | +9.22%+9.57% | -4.49%-3.07% | +3.11%+8.05% | -2.64%+4.01% | +60.62%+82.69% | +49.54%+74.41% |
| Flows | IDU FXU | -$64M-$31M | +$75M-$50M | -$294M-$1.11B | -$86M-$1.02B | +$165M+$212M | +$235M+$290M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IDU FXU | +14.18%+14.04% | +14.97%+14.15% | +15.14%+15.31% | +16.64%+16.70% |
| Max drawdown | IDU FXU | -12.56%-11.64% | -15.29%-13.96% | -15.29%-13.96% | -24.11%-21.82% |
| Max drawdown duration | IDU FXU | 92d91d | 240d201d | 240d201d | 610d604d |
Trading data
IDU | FXU | |
Last sale 10/28/2026 at 1:30 PM | $108.59 | $47.53 |
| Previous close 10/27/2026 | $109.84 | $47.84 |
| Consolidated volume 10/27/2026 | ||
| 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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IDU | FXU | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/28/2026 at 1:30 PM
Live
Closed
IDU | FXU | |
|---|---|---|
| Last price | $108.59 | $47.53 |
| 1D performance | -1.14% | -0.65% |
| AuM | $1.39 B | $760.26 M |
| E/R | 0.37% | 0.61% |
Characteristics
IDU | FXU | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | iShares | First Trust |
| Benchmark | Russell 1000 Utilities RIC 22.5/45 Capped Index | StrataQuant Utilities Index |
| N° of holdings | 46 | 40 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | June 12, 2000 | May 8, 2007 |
| ESG | No | No |
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Exposure
Countries
IDU
USA
99.82%
Other
0.18%
FXU
USA
99.74%
Other
0.26%
Sectors
IDU
Utilities
88.77%
Business Services
9.85%
Other
1.39%
FXU
Utilities
87.24%
Energy
9.66%
Other
3.1%
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Diversification
IDU
Total weight of top 15 holdings out of 15
65.83%
FXU
Total weight of top 15 holdings out of 15
57.48%
Top 15 holdings
Data as of August 31, 2026
IDU
NextEra Energy, Inc.
11.10%
The Southern Co.
6.41%
Duke Energy Corp.
6.03%
Constellation Energy Corp.
5.69%
Waste Management, Inc.
5.26%
American Electric Power Co., Inc.
4.31%
Dominion Energy, Inc.
3.75%
Sempra
3.45%
Entergy Corp.
3.14%
Xcel Energy, Inc.
3.05%
Vistra Corp.
2.98%
Exelon Corp.
2.89%
Republic Services, Inc.
2.84%
Consolidated Edison, Inc.
2.55%
Public Service Enterprise Group, Inc.
2.36%
FXU
UGI Corp.
4.89%
National Fuel Gas Co.
4.77%
The AES Corp.
4.42%
Eversource Energy
4.28%
Consolidated Edison, Inc.
4.27%
Exelon Corp.
4.13%
Essential Utilities, Inc.
3.77%
PG&E Corp.
3.67%
Edison International
3.47%
Duke Energy Corp.
3.34%
PPL Corp.
3.33%
OGE Energy Corp.
3.32%
Evergy, Inc.
3.31%
MDU Resources Group, Inc.
3.30%
Pinnacle West Capital Corp.
3.21%
Frequently asked questions about IDU and FXU
How have the IDU and FXU ETFs performed in 2026?
As of October 27, 2026, IDU is up 3.11% year-to-date (YTD), while FXU has returned 8.05%. That puts FXU better performer ahead so far this year.
Which ETF is attracting more investor money: IDU or FXU?
Year-to-date, the IDU ETF saw -$294M in flows, compared to -$1.11B for FXU.
Which ETF is more volatile: IDU or FXU?
Over the past year, IDU had a volatility of 14.97%, while FXU experienced 14.15%.
Which ETF is bigger: IDU or FXU?
As of October 27, 2026, IDU holds $1.39 B in assets under management (AUM), while FXU manages $760.26 M.
What sectors do the IDU and FXU ETFs invest in?
IDU leans toward sectors like Utilities and Business Services. Meanwhile, FXU focuses on Utilities and Energy.
What are the top holdings of the IDU ETF and FXU ETF?
IDU top holdings include NextEra Energy, Inc., The Southern Co. and Duke Energy Corp.. FXU holds in its top three: UGI Corp., National Fuel Gas Co. and The AES Corp..
Which ETF is more diversified: IDU or FXU?
IDU holds 46 securities with 65.83% of its assets in the top 15. FXU has 40 securities and a top 15 weight of 57.48%.
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Latest news about IDU & FXU
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