IONvsTANETF Comparison
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ProShares S&P Global Core Battery Metals ETF (ION) and Invesco Solar ETF (TAN) belong to the same industry segment: Alternative Energy. ION's top 3 sector exposures are Non-Energy Materials, Industrials and Energy. In contrast, TAN's top sector exposures are Industrials, Utilities and Technology. ION is less expensive with a Total Expense Ratio (TER) of 0.58%, versus 0.7% for TAN. ION is down -22.62% year-to-date (YTD) with +$4M in YTD flows. TAN performs better with -14.74% YTD performance, and +$135M in YTD flows. Run a side-by-side ETF comparison of ION and TAN 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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ION vs TAN performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/27/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | ION TAN | -12.39%-2.63% | -14.92%-18.64% | -22.62%-14.74% | -1.94%-14.10% | +40.70%+2.00% | n/a-55.15% |
| Flows | ION TAN | -$984K+$46M | -$984K-$354M | +$4M+$135M | +$9M+$191M | +$9M-$92M | --$776M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | ION TAN | +25.21%+32.37% | +33.91%+34.63% | +28.03%+35.92% | n/a+36.15% |
| Max drawdown | ION TAN | -28.14%-23.61% | -41.73%-44.70% | -41.73%-51.26% | n/a-73.61% |
| Max drawdown duration | ION TAN | 64d84d | 173d149d | 173d756d | n/a1821d |
Trading data
ION | TAN | |
Last sale 10/27/2026 at 3:04 PM | $40.13 | $40.58 |
| Previous close 10/27/2026 | $39.43 | $42.02 |
| 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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ION | TAN | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/27/2026 at 3:04 PM
Live
Closed
ION | TAN | |
|---|---|---|
| Last price | $40.13 | $40.58 |
| 1D performance | +1.78% | -3.43% |
| AuM | $8.96 M | $905.54 M |
| E/R | 0.58% | 0.7% |
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Exposure
Countries
ION
China
31.05%
Australia
17.26%
South Africa
9.91%
Indonesia
8.68%
Other
33.09%
TAN
USA
44.16%
Israel
20.64%
China
8.02%
Other
27.18%
Sectors
ION
Non-Energy Materi.
87.12%
Other
12.88%
TAN
Industrials
45.18%
Utilities
33.33%
Technology
10.23%
Other
11.25%
Diversification
ION
Total weight of top 15 holdings out of 15
46.59%
TAN
Total weight of top 15 holdings out of 15
71.93%
Top 15 holdings
Data as of August 31, 2026
ION
Pacific Metals Co., Ltd.
4.26%
IGO Ltd.
4.23%
PT Vale Indonesia Tbk
3.65%
PLS Group Ltd.
3.40%
Sociedad Quimica y Minera de Chile SA
3.22%
Elevra Lithium Ltd.
3.21%
African Rainbow Minerals Ltd.
3.02%
Mineral Resources Ltd.
2.82%
Albemarle Corp.
2.81%
Tibet Mineral Development Co., Ltd.
2.74%
Liontown Ltd.
2.74%
PT Timah (Persero) Tbk
2.71%
Eramet SA
2.71%
First Quantum Minerals Ltd.
2.60%
Zangge Mining Co., Ltd.
2.47%
TAN
First Solar, Inc.
9.83%
Nextpower, Inc.
9.19%
Enlight Renewable Energy Ltd.
7.18%
Enphase Energy, Inc.
6.75%
Doral Group Renewable Energy Resources Ltd.
4.53%
HA Sustainable Infrastructure Capital, Inc.
4.50%
GCL Technology Holdings Ltd.
4.13%
Sunrun, Inc.
3.83%
Clearway Energy, Inc.
3.57%
SolarEdge Technologies, Inc.
3.48%
Solaria Energía y Medio Ambiente SA
3.34%
OY Nofar Energy Ltd.
3.20%
Xinyi Solar Holdings Ltd.
2.98%
SMA Solar Technology AG
2.82%
Shoals Technologies Group, Inc.
2.60%
Frequently asked questions about ION and TAN
How have the ION and TAN ETFs performed in 2026?
As of October 27, 2026, ION is down -22.62% year-to-date (YTD), while TAN has lost -14.74%. That puts TAN better performer ahead so far this year.
Which ETF is attracting more investor money: ION or TAN?
Year-to-date, the ION ETF saw +$4M in flows, compared to +$135M for TAN.
Which ETF is more volatile: ION or TAN?
Over the past year, ION had a volatility of 33.91%, while TAN experienced 34.63%.
Which ETF is bigger: ION or TAN?
As of October 27, 2026, ION holds $8.96 M in assets under management (AUM), while TAN manages $905.54 M.
What sectors do the ION and TAN ETFs invest in?
ION leans toward sectors like Non-Energy Materials. Meanwhile, TAN focuses on Industrials, Utilities and Technology.
What are the top holdings of the ION ETF and TAN ETF?
ION top holdings include Pacific Metals Co., Ltd., IGO Ltd. and PT Vale Indonesia Tbk. TAN holds in its top three: First Solar, Inc., Nextpower, Inc. and Enlight Renewable Energy Ltd..
Which ETF is more diversified: ION or TAN?
ION holds 51 securities with 46.59% of its assets in the top 15. TAN has 35 securities and a top 15 weight of 71.93%.
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