# BIB (ProShares Ultra Nasdaq Biotechnology)

ProShares · Leveraged ETFs · data as of Sep 30, 2026

Three months to Sep 30, 2026: BIB returned +14.7% where its own daily promise gave +20.9%, 6.2 points short.

## Key facts

- BIB, what IBB did: +10.7%, as of Sep 30, 2026.
- BIB, what 2 times a day gives: +20.9%, as of Sep 30, 2026.
- BIB, what the fund returned: +14.7%, as of Sep 30, 2026.
- BIB, the fund itself cost: −6.2 pts, as of Sep 30, 2026.
- BIB, net assets: $97m (issuer page, as of Sep 30, 2026).
- BIB, expense ratio: 0.95% (485BPOS XBRL, Sep 25, 2026).

## BIB over each window to Sep 30, 2026

| Window | Fund | IBB | +2x the move | Difference | IBB moved about |
| --- | --- | --- | --- | --- | --- |
| 1 month | −0.9% | +0.7% | +1.4% | −2.3 pts | 19% |
| 3 months | +14.7% | +10.7% | +21.5% | −6.8 pts | 24% |
| 6 months | +39.9% | +23.8% | +47.5% | −7.6 pts | 23% |
| 1 year | +94.3% | +46.1% | +92.2% | +2.0 pts | 22% |
| 3 years | +147.5% | +73.4% | +146.8% | +0.7 pts | 21% |
| Since launch | +1483.7% | +614.4% | not meaningful over this window | not meaningful over this window | 24% |

## Every published field

| Field | Value | Source |
| --- | --- | --- |
| Sets out to return | +2 times the daily move of IBB, reset daily | ETFIQ |
| Multiple a holder actually got over the window | +1.36 times, against +2 stated | ETFIQ |
| Underlying | IBB | ETFIQ |
| Segment | sector or country, sector | ETFIQ |
| Net assets | $97m | issuer page, as of Sep 30, 2026 |
| Expense ratio | 0.95% | 485BPOS XBRL, Sep 25, 2026 |
| Launched | Apr 8, 2010 | ETFIQ |
| Underlying volatility over the window | 24% annualized | ETFIQ |

## Questions

### Did BIB return +2 times IBB?

Over the window to Sep 30, 2026, IBB moved +10.7% and BIB returned +14.7%. 2 times that move is +21.5%, so the fund came out 6.8 points short of it.

### Why does BIB not return +2 times over a year?

Because it resets daily. BIB aims at +2 times each day's move, and daily results compound. Over a run where the underlying falls and comes back, compounding a levered daily return leaves a holder behind what +2 times the period move would suggest; over a steady run in one direction it can leave them ahead. The longer the holding, and the more the underlying moves about, the further apart the two figures get.


## Cite this page

ETFIQ, BIB, data as of Sep 30, 2026. https://etfiq.com/funds/bib
Free to use with attribution; the underlying files are at https://etfiq.com/data/.

HTML: https://etfiq.com/funds/bib  ·  JSON: https://etfiq.com/funds/bib.json