BBP vs IBB: which is really different?
BBP and IBB hold 33% of their weight in the same names, and BBP returned +45.2% over the year. Virtus Biotech ETF and iShares Biotechnology ETF.
BBP costs 0.10 points a year less; their one-year returns differ by 9.1 points; IBB is far larger, $10.8bn against $99m.
| BBP | IBB | |
|---|---|---|
| Expense ratio | 0.34% | 0.44% |
| Net assets, BBP as of Jul 31, 2026 and IBB as of Oct 9, 2026 | $99m | $10.8bn |
| Total return, 1 year | +45.2% | +36.1% |
| What it tracks | Biotech | Biotech |
| Holdings in common | 33% | |
| S&P 500, total return, 1 year | +17.3% | |
| Against the S&P 500, 1 year | ahead by 27.9 pts | ahead by 18.8 pts |
Holdings in common uses holdings dated Jul 31, 2026 and Oct 8, 2026.
11% of BBP's weight is in S&P 500 companies and 90% is outside the index. Holdings as of Jul 31, 2026.
40% of IBB's weight is in S&P 500 companies and 61% 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, BBP and IBB hold 33% 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 Jul 31, 2026 and Oct 8, 2026.
half
33% in common
33% 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 | BBP | IBB | BBP | IBB | BBP | IBB |
| 3 months | +4.5% | +7.5% | +1.1 pts | +4.1 pts | +0.8 pts | +3.9 pts |
| 6 months | +24.3% | +21.9% | +9.2 pts | +6.8 pts | +1.1 pts | −1.3 pts |
| 1 year | +45.2% | +36.1% | +27.9 pts | +18.8 pts | +21.6 pts | +12.5 pts |
| 3 years | +110.3% | +69.1% | +24.5 pts | −16.7 pts | +3.0 pts | −38.2 pts |
| Since launch BBP Dec 2014 · IBB Feb 2001 | +308.1% | +525.3% | −63.1 pts | −299.7 pts | −400.3 pts | −936.3 pts |
Source: ETFIQ. Open the live comparison on ETFIQ →
On the same fields
As of Oct 9, 2026. Source: ETFIQ.
BBP in plain words
By weight, 10% of BBP'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 20% of the fund across 67 positions, as filed for Jul 31, 2026. Over the year to Oct 9, 2026 the fund returned +45.2% with distributions reinvested against +17.3% for the S&P 500, so a holder was ahead by 27.9 pts.
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.
Questions people ask
- Do BBP and IBB hold the same stocks?
- By their latest filings, 33% of their books are the same securities at the same weight, which is a meaningful overlap. 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, BBP against IBB, data as of Oct 9, 2026. https://etfiq.com/compare/themes/bbp-vs-ibb
ETFIQ. (Oct 9, 2026). BBP against IBB. Retrieved from https://etfiq.com/compare/themes/bbp-vs-ibb
[BBP against IBB (ETFIQ, Oct 9, 2026)](https://etfiq.com/compare/themes/bbp-vs-ibb)
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.