Data as of .
IDEF vs IFRA: which is really different?
IFRA holds 71.4% of its weight in S&P 500 companies and IDEF 36.1%.
ETFIQ Off-Index Score: IDEF scores higher
How much of it is not the index it is sold as an alternative to?
A percentile among the 371 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
What they hold in common
By the books each fund has filed, IDEF and IFRA hold 2% of their money in the same securities at the same weight.
| Holding | IDEF | IFRA |
|---|---|---|
| ATI | 0.80% | 1.03% |
| CARPENTER TECHNOLOGY | 0.74% | 0.83% |
| DASSAULT AVIATION SA | 0.48% | 0.22% |
| USD CASH | 2.72% | 0.18% |
| TUTOR PERINI | 0.16% | 0.15% |
| Only in IDEF | Only in IFRA |
|---|---|
| RTX 6.72% | UNION PACIFIC 4.43% |
| PALANTIR TECHNOLOGIES CLASS A 4.71% | NEXTERA ENERGY 4.05% |
| LOCKHEED MARTIN CORP 3.62% | CATERPILLAR INC 3.76% |
| BOEING 3.32% | QUANTA SERVICES INC 3.52% |
| ROLLS-ROYCE HOLDINGS PLC 3.30% | CSX 3.48% |
| GENERAL DYNAMICS CORP 2.97% | SOUTHERN 2.91% |
| THALES SA 2.61% | CONSTELLATION ENERGY CORP 2.85% |
| NORTHROP GRUMMAN CORP 2.56% | NORFOLK SOUTHERN CORP 2.78% |
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 10, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| IDEF | IFRA | IDEF | IFRA | IDEF | IFRA | |
| 3 months | −1.9% | −5.6% | −5.2 pts | −8.9 pts | −1.1 pts | −4.8 pts |
| 6 months | −8.5% | +2.3% | −24.5 pts | −13.7 pts | −29.2 pts | −18.4 pts |
| 1 year | +4.9% | +13.5% | −12.6 pts | −4.0 pts | −18.1 pts | −9.5 pts |
| 3 years | not published | +61.6% | not published | −16.3 pts | not published | −33.5 pts |
| Since launch | +26.5% | +169.3% | −6.4 pts | −57.4 pts | −13.6 pts | −200.6 pts |
| IDEF iShares Defense Industrials Active ETF Holds 152 stocks in defense, 36% of its weight in S&P 500 companies | IFRA iShares U.S. Infrastructure ETF Holds 164 stocks in infrastructure, 71% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | iShares | iShares |
| Theme | Defense | Infrastructure |
| In the S&P 500 | 36.1% | 71.4% |
| Active share vs the S&P 500 | 95.9% | 95.7% |
| In the Nasdaq-100 | 8.5% | 11.0% |
| Holdings | 152 | 164 |
| Top ten, share of the fund | 35.2% | 33.1% |
| Expense ratio | not published | 0.30% |
| Fee for the differing part | not published | 0.31% |
| Total return, 1 year | +4.9% | +13.5% |
| vs the S&P 500 | −12.6 pts | −4.0 pts |
| vs the Nasdaq-100 | −18.1 pts | −9.5 pts |
| Below its high | −13.9% | −8.9% |
IDEF in plain words
By weight, 36% of IDEF's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 96%. The top ten holdings are 35% of the fund across 152 positions, as published by its issuer for Sep 10, 2026. Over the year to Sep 11, 2026 the fund returned +4.9% with distributions reinvested against +17.5% for the S&P 500, so a holder was behind by 12.6 pts. It sits 13.9% below its all-time high of Mar 2, 2026.
IFRA in plain words
By weight, 71% of IFRA's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 96%. The top ten holdings are 33% of the fund across 164 positions, as published by its issuer for Sep 10, 2026. Over the year to Sep 11, 2026 the fund returned +13.5% with distributions reinvested against +17.5% for the S&P 500, so a holder was behind by 4.0 pts. It sits 8.9% below its all-time high of Jun 25, 2026.
Questions people ask
- Which is more different from the S&P 500, IDEF or IFRA?
- IDEF has 36% of its weight in S&P 500 names and IFRA has 71%, so IDEF differs more from the index.
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, IDEF against IFRA, data as of Sep 11, 2026. https://etfiq.com/compare/themes/idef-vs-ifra Free to use with attribution; the underlying files are at Open data.