BIB vs IBB
ProShares Ultra NASDAQ Biotechnology against iShares Biotechnology ETF: cost, size, returns, what they hold and how much of it is the same.
Overlap by weight
55%
208 shared positions
Fee gap
51 bp
IBB is cheaper
1-year return gap
31.5 pts
BIB is ahead
Larger fund
IBB
$11.0B
Side by side
| BIB | IBB | |
|---|---|---|
| Fund | ProShares Ultra NASDAQ Biotechnology | iShares Biotechnology ETF |
| Issuer | ProShares | iShares |
| Category | Leveraged Equity | Biotech & Health Innovation |
| Expense ratio | 0.95% | 0.44% |
| Assets | $96M | $11.0B |
| Average daily dollar volume | $842K | $341M |
| Listed | Apr 6, 2010 | Feb 5, 2001 |
| FrenzyCap score | 44 | 82 |
| 1-month return | −2.1% | +0.4% |
| 3-month return | +15.8% | +11.9% |
| Year to date | +43.8% | +25.4% |
| 1-year return | +66.7% | +35.2% |
| 30-day volatility | 50.7% | 25.5% |
| Worst drawdown, 1 year | −17.9% | −9.7% |
| Trailing 12-month yield | 0.20% | 0.16% |
| Holdings | 256 | 248 |
| Top 10 weight | 157.8% | 51.1% |
| Look-through P/E | — | — |
| Holdings vs fair value | +3.4% | +0.4% |
| Holdings above 200-day average | 78% | 81% |
| Net flow, latest 3 reported months | −$14M thru May 2026 | −$43M thru Jun 2026 |
| 30-day implied volatility | 49.1% | 25.4% |
| Holdings as of | as of Oct 21, 2026issuer data | as of Oct 20, 2026issuer data |
Returns are price returns and exclude distributions. Flows are each fund's own latest reported months and may not cover the same period.
Largest shared holdings
55% of BIB · 92% of IBB| Holding | BIB | IBB |
|---|---|---|
| GILD | 5.12% | 8.49% |
| AMGN | 4.97% | 8.10% |
| VRTX | 4.70% | 7.50% |
| MRNA | 3.92% | 6.21% |
| REGN | 3.25% | 5.62% |
| ILMN | 1.70% | 2.83% |
| RVMD | 1.66% | 2.66% |
| BIIB | 1.42% | 2.50% |
| ALNY | 1.20% | 2.16% |
| ROIV | 1.06% | 1.28% |
| ARGX | 0.97% | 3.39% |
| UTHR | 0.96% | 1.61% |
| INCY | 0.92% | 1.65% |
| INSM | 0.82% | 1.44% |
| MEDP | 0.74% | 0.98% |
| EXEL | 0.64% | 1.08% |
| ASND | 0.59% | 1.01% |
| NBIX | 0.57% | 1.00% |
| HALO | 0.56% | 0.98% |
| ONC | 0.55% | 2.27% |
| BBIO | 0.54% | 0.83% |
| TEM | 0.47% | 0.50% |
| BMRN | 0.43% | 0.76% |
| MDGL | 0.42% | 0.71% |
| BNTX | 0.42% | 0.61% |
Sector mix of the stock holdings
| Sector | BIB | IBB | Gap |
|---|---|---|---|
| Health Care | 58.3% | 95.4% | −37.1% |
| Technology | 2.6% | 4.5% | −1.9% |
| Materials | 0.0% | 0.0% | −0.0% |
More: full overlap table · BIB holdings · IBB holdings
Fund data comes from each fund's SEC filings and issuer disclosures and is shown with the date it is as of. SEC portfolio and flow filings become public about 60 days after the period they cover. Nothing here is investment advice; see Terms.