Data as of .
HYDR vs SMOG: which is really different?
HYDR and SMOG hold 8% of their weight in the same names, and HYDR returned more over the year.
ETFIQ Off-Index Score: HYDR scores higher
How much of it is not the index it is sold as an alternative to?
A percentile among the 379 thematic ETFs with a holdings filing. It is a position in a set, not a rating, and neither end of it is a recommendation. All thematic ETFs ranked by it · How it is computed
8% of the two portfolios are the same securities at the same weight.
What they hold in common
By the books each fund has filed, HYDR and SMOG hold 8% of their money in the same securities at the same weight.
| Holding | HYDR | SMOG |
|---|---|---|
| BLOOM ENERGY CORP- A | 16.93% | 7.57% |
| JOHNSON MATTHEY PLC | 2.39% | 0.65% |
| Only in HYDR | Only in SMOG |
|---|---|
| DOOSAN FUEL CELL CO LTD 11.51% | Iberdrola Sa 8.72% |
| PLUG POWER INC 9.73% | Tesla Inc 8.08% |
| CERES POWER HOLDINGS PLC 7.38% | Nextera Energy Inc 7.04% |
| SFC ENERGY AG-BR 6.38% | Enel Spa 6.41% |
| FUELCELL ENERGY INC 5.59% | Vestas Wind Systems A/S 5.77% |
| ITM POWER PLC 4.34% | Byd Co Ltd 5.40% |
| NEL ASA 4.32% | Samsung Sdi Co Ltd 5.14% |
| VINA TECH CO LTD 3.73% | First Solar Inc 3.05% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Sep 17, 2026 and Sep 18, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| HYDR | SMOG | HYDR | SMOG | HYDR | SMOG | |
| 3 months | −19.9% | −7.7% | −22.2 pts | −9.9 pts | −17.5 pts | −5.2 pts |
| 6 months | +21.4% | +3.1% | +3.4 pts | −14.9 pts | −2.8 pts | −21.1 pts |
| 1 year | +37.6% | +11.5% | +21.0 pts | −5.0 pts | +15.8 pts | −10.2 pts |
| 3 years | +17.1% | +29.0% | −61.3 pts | −49.4 pts | −81.0 pts | −69.2 pts |
| Since launch | −60.3% | +112.2% | −147.6 pts | −691.3 pts | −165.0 pts | −1578.0 pts |
| HYDR Global X Hydrogen ETF Holds 30 stocks in clean energy, 5% of its weight in S&P 500 companies | SMOG VanEck Low Carbon Energy ETF Holds 55 stocks in clean energy, 18% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | Global X | VanEck |
| Theme | Clean energy | Clean energy |
| In the S&P 500 | 5.1% | 18.2% |
| Active share vs the S&P 500 | 99.7% | 97.8% |
| In the Nasdaq-100 | 0.0% | 8.1% |
| Holdings | 30 | 55 |
| Top ten, share of the fund | 73.1% | 60.1% |
| Expense ratio | 0.50% | 0.64% |
| Fee for the differing part | 0.50% | 0.65% |
| Total return, 1 year | +37.6% | +11.5% |
| vs the S&P 500 | +21.0 pts | −5.0 pts |
| vs the Nasdaq-100 | +15.8 pts | −10.2 pts |
| Below its high | −67.1% | −23.9% |
| Net assets | $98m | $133m |
HYDR in plain words
By weight, 5% of HYDR's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 100%. The top ten holdings are 73% of the fund across 30 positions, as published by its issuer for Sep 18, 2026. Over the year to Sep 18, 2026 the fund returned +37.6% with distributions reinvested against +16.6% for the S&P 500, so a holder was ahead by 21.0 pts. It sits 67.1% below its all-time high of Nov 8, 2021.
SMOG in plain words
By weight, 18% of SMOG's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 98%. The top ten holdings are 60% of the fund across 55 positions, as published by its issuer for Sep 17, 2026. Over the year to Sep 18, 2026 the fund returned +11.5% with distributions reinvested against +16.6% for the S&P 500, so a holder was behind by 5.0 pts. It sits 23.9% below its all-time high of Jan 22, 2021.
Questions people ask
- Do HYDR and SMOG hold the same stocks?
- By their latest filings, 8% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.
- Which is more different from the S&P 500, HYDR or SMOG?
- HYDR has 5% of its weight in S&P 500 names and SMOG has 18%, so HYDR differs more from the index.
- Which is cheaper, HYDR or SMOG?
- HYDR charges 0.50% a year and SMOG charges 0.64%, so HYDR is cheaper. Fees come from each fund's prospectus.
Other comparisons
Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, HYDR against SMOG, data as of Sep 18, 2026. https://etfiq.com/compare/themes/hydr-vs-smog Free to use with attribution; the underlying files are at Open data.