IBB vs SCZ: Holdings Overlap
iShares · 254 holdings · $9.3B · as of 2026-03-31
SCZiShares MSCI EAFE Small-Cap ETF
iShares · 2044 holdings · $13.5B · as of 2026-04-30
Holdings snapshots are 30 days apart (IBB: 2026-03-31, SCZ: 2026-04-30). 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 IBB and SCZ?
iShares Biotechnology ETF (IBB, by iShares) holds 254 positions; iShares MSCI EAFE Small-Cap ETF (SCZ, by iShares) holds 2044. They have 1 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
- 1IBB holds 254 · SCZ holds 2044
- Weight in Shared Holdings
- IBB 0%·SCZ 0%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 IBB
253 of 254 positions (99.8% of the fund) are not held by SCZ. Showing the top 30 by weight.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IBB | -0.3% | +17.3% | +51.0% | +16.4% | +3.1% | +7.4% | 0.21% |
| SCZ | +4.1% | +13.5% | +20.2% | +16.6% | +5.9% | +8.6% | 3.07% |
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 IBB vs SCZ →
Shared Holdings(1)
 PHVSPharvaris NV | 0.07% | 0.02% | 0.02% |
|---|
Frequently Asked Questions
How much do IBB and SCZ overlap?
IBB and SCZ overlap by 0.0% of portfolio weight. They share 1 holdings (IBB holds 254 positions and SCZ holds 2044), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IBB and SCZ?
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 IBB and SCZ?
The largest positions held by both funds are PHVS. Together the top 1 shared positions account for 95% of the total overlap.
What does IBB own that SCZ doesn't?
253 positions (99.8% of IBB) are unique to IBB, led by GILD, AMGN and VRTX. In the other direction, 2043 positions (99.3% of SCZ) are unique to SCZ.