Data as of .
IDEF vs KDEF: which is really different?
IDEF and KDEF hold 6% of their weight in the same names, and IDEF returned more over the year.
ETFIQ Off-Index Score: KDEF 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
6% of the two portfolios are the same securities at the same weight.
What they hold in common
By the books each fund has filed, IDEF and KDEF hold 6% of their money in the same securities at the same weight.
| Only in IDEF | Only in KDEF |
|---|---|
| RTX 6.55% | HANWHA AEROSPACE CO LTD 18.69% |
| PALANTIR TECHNOLOGIES CLASS A 5.02% | HYUNDAI ROTEM COMPANY 17.07% |
| BLK CSH FND TREASURY SL AGENCY 3.77% | LIG DEFENSE & AEROSPACE CO LTD 5.87% |
| LOCKHEED MARTIN CORP 3.62% | HD HYUNDAI HEAVY INDUSTRIES CO LTD 4.79% |
| ROLLS-ROYCE HOLDINGS PLC 3.29% | KOREA AEROSPACE INDUSTRIES LTD 4.58% |
| BOEING 3.19% | FIRSTEC COMPANY LTD 4.53% |
| GENERAL DYNAMICS CORP 2.94% | POONGSAN CORP 4.14% |
| NORTHROP GRUMMAN CORP 2.58% | HANWHA SYSTEMS CO LTD 4.12% |
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 May 31, 2026 and Sep 18, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| IDEF | KDEF | IDEF | KDEF | IDEF | KDEF | |
| 3 months | −1.6% | −11.8% | −3.9 pts | −14.1 pts | +0.9 pts | −9.3 pts |
| 6 months | −5.7% | −18.0% | −23.8 pts | −36.0 pts | −30.0 pts | −42.2 pts |
| 1 year | +4.4% | −8.0% | −12.2 pts | −24.5 pts | −17.4 pts | −29.7 pts |
| Since launch | +27.2% | +113.7% | −5.6 pts | +85.1 pts | −14.2 pts | +75.7 pts |
| IDEF iShares Defense Industrials Active ETF Holds 155 stocks in defense, 36% of its weight in S&P 500 companies | KDEF PLUS Korea Defense Industry Index ETF Holds 20 stocks in defense, 0% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | iShares | PLUS |
| Theme | Defense | Defense |
| In the S&P 500 | 36.2% | 0.0% |
| Active share vs the S&P 500 | 95.9% | 100.0% |
| In the Nasdaq-100 | 9.2% | 0.0% |
| Holdings | 155 | 20 |
| Top ten, share of the fund | 35.8% | 71.4% |
| Expense ratio | not published | 0.65% |
| Fee for the differing part | not published | 0.65% |
| Total return, 1 year | +4.4% | −8.0% |
| vs the S&P 500 | −12.2 pts | −24.5 pts |
| vs the Nasdaq-100 | −17.4 pts | −29.7 pts |
| Below its high | −13.4% | −34.6% |
| Net assets | $4.3bn | $157m |
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 36% of the fund across 155 positions, as published by its issuer for Sep 18, 2026. Over the year to Sep 18, 2026 the fund returned +4.4% with distributions reinvested against +16.6% for the S&P 500, so a holder was behind by 12.2 pts. It sits 13.4% below its all-time high of Mar 2, 2026.
KDEF in plain words
By weight, 0% of KDEF'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 71% of the fund across 20 positions, as filed for May 31, 2026. Over the year to Sep 18, 2026 the fund returned −8.0% with distributions reinvested against +16.6% for the S&P 500, so a holder was behind by 24.5 pts. It sits 34.6% below its all-time high of May 5, 2026.
Questions people ask
- Do IDEF and KDEF hold the same stocks?
- By their latest filings, 6% 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, IDEF or KDEF?
- IDEF has 36% of its weight in S&P 500 names and KDEF has 0%, so KDEF 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 KDEF, data as of Sep 18, 2026. https://etfiq.com/compare/themes/idef-vs-kdef Free to use with attribution; the underlying files are at Open data.