IBB vs IGV: which is really different?
IBB and IGV hold 0% of their weight in the same names, and IBB returned +36.1% over the year. iShares Biotechnology ETF and iShares Expanded Tech-Software Sector ETF.
IGV costs 0.06 points a year less; their one-year returns differ by 38.7 points; IGV is 1.4 times larger.
| IBB | IGV | |
|---|---|---|
| Expense ratio | 0.44% | 0.38% |
| Net assets, as of Oct 8, 2026 | $10.3bn | $14.6bn |
| Total return, 1 year | +36.1% | −2.6% |
| What it tracks | Biotech | Cloud and software |
| Holdings in common | 0% | |
| S&P 500, total return, 1 year | +17.3% | |
| Against the S&P 500, 1 year | ahead by 18.8 pts | behind by 19.8 pts |
Holdings in common uses holdings dated Oct 8, 2026.
40% of IBB's weight is in S&P 500 companies and 61% is outside the index. Holdings as of Oct 8, 2026.
81% of IGV's weight is in S&P 500 companies and 19% is outside the index. Holdings as of Oct 8, 2026.
A percentile among the 391 thematic ETFs with a holdings filing. All thematic ETFs ranked by it → How it is computed →
What they hold in common
By the books each fund has filed, IBB and IGV hold 0% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Oct 8, 2026.
half
0% in common
0% of the two portfolios are the same securities at the same weight.
Performance, window by window
| Total return | vs the S&P 500 | vs the Nasdaq-100 | ||||
|---|---|---|---|---|---|---|
| Window | IBB | IGV | IBB | IGV | IBB | IGV |
| 3 months | +7.5% | +21.9% | +4.1 pts | +18.5 pts | +3.9 pts | +18.3 pts |
| 6 months | +21.9% | +50.9% | +6.8 pts | +35.8 pts | −1.3 pts | +27.7 pts |
| 1 year | +36.1% | −2.6% | +18.8 pts | −19.8 pts | +12.5 pts | −26.2 pts |
| 3 years | +69.1% | +59.8% | −16.7 pts | −26.0 pts | −38.2 pts | −47.5 pts |
| Since launch IBB Feb 2001 · IGV Jul 2001 | +525.3% | +1,022.6% | −299.7 pts | +119.1 pts | −936.3 pts | −943.1 pts |
Source: ETFIQ. Open the live comparison on ETFIQ →
On the same fields
As of Oct 9, 2026. Source: ETFIQ.
IBB in plain words
By weight, 40% of IBB's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 99%. The top ten holdings are 50% of the fund across 245 positions, as published by its issuer for Oct 8, 2026. Over the year to Oct 9, 2026 the fund returned +36.1% with distributions reinvested against +17.3% for the S&P 500, so a holder was ahead by 18.8 pts.
IGV in plain words
By weight, 81% of IGV's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 92%. The top ten holdings are 61% of the fund across 108 positions, as published by its issuer for Oct 8, 2026. Over the year to Oct 9, 2026 the fund returned −2.6% with distributions reinvested against +17.3% for the S&P 500, so a holder was behind by 19.8 pts.
Questions people ask
- Do IBB and IGV hold the same stocks?
- By their latest filings, 0% 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.
ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.
How this is computed
It is a position in a set, not a rating, and neither end of it is a recommendation.
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed.
Every figure is an ETFIQ calculation with distributions reinvested.
ETFIQ, IBB against IGV, data as of Oct 9, 2026. https://etfiq.com/compare/themes/ibb-vs-igv
ETFIQ. (Oct 9, 2026). IBB against IGV. Retrieved from https://etfiq.com/compare/themes/ibb-vs-igv
[IBB against IGV (ETFIQ, Oct 9, 2026)](https://etfiq.com/compare/themes/ibb-vs-igv)
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.