DFEM vs IBB: Holdings Overlap
DFEMDimensional Emerging Markets Core Equity 2 ETF
Dimensional · 6579 holdings · $9.0B · as of 2026-04-30
iShares · 254 holdings · $9.3B · as of 2026-03-31
Holdings snapshots are 30 days apart (DFEM: 2026-04-30, IBB: 2026-03-31). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are DFEM and IBB?
Dimensional Emerging Markets Core Equity 2 ETF (DFEM, by Dimensional) holds 6579 positions; iShares Biotechnology ETF (IBB, by iShares) holds 254. They have 2 holdings in common, and by portfolio weight the two funds are 0.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 2DFEM holds 6579 · IBB holds 254
- Weight in Shared Holdings
- DFEM 0%·IBB 2%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in DFEM
6577 of 6579 positions (100.1% of the fund) are not held by IBB. Showing the top 30 by weight.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| DFEM | +0.2% | +19.5% | +31.4% | +19.8% | — | — | 1.89% |
| IBB | -0.3% | +17.3% | +51.0% | +16.4% | +3.1% | +7.4% | 0.21% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in DFEM vs IBB →
Shared Holdings(2)
Frequently Asked Questions
How much do DFEM and IBB overlap?
DFEM and IBB overlap by 0.0% of portfolio weight. They share 2 holdings (DFEM holds 6579 positions and IBB holds 254), based on each fund's latest SEC-reported holdings.
Is it redundant to own both DFEM and IBB?
The two portfolios are 0.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of DFEM and IBB?
The largest positions held by both funds are ONC and ZLAB. Together the top 2 shared positions account for 93% of the total overlap.
What does DFEM own that IBB doesn't?
6577 positions (100.1% of DFEM) are unique to DFEM, led by TSMWF, 005930 and 000660. In the other direction, 252 positions (97.8% of IBB) are unique to IBB.