# BIB (ProShares Ultra Nasdaq Biotechnology)

ProShares · Leveraged ETFs · data as of Sep 11, 2026

Three months to Sep 11, 2026: BIB returned +32.8% where its own daily promise gave +39.4%, 6.6 points short.

## Key facts

- BIB, what IBB did: +18.9%, as of Sep 11, 2026.
- BIB, what +2 times a day gives: +39.4%, as of Sep 11, 2026.
- BIB, what the fund returned: +32.8%, as of Sep 11, 2026.
- BIB, the fund itself cost: −6.6 pts, as of Sep 11, 2026.
- BIB, net assets: $95m (issuer page, as of Sep 11, 2026).
- BIB, expense ratio: 0.95% (485BPOS XBRL, Sep 23, 2025).

## BIB over each window to Sep 11, 2026

| Window | Fund | IBB | +2x the move | Difference | IBB moved about |
| --- | --- | --- | --- | --- | --- |
| 1 month | +0.3% | +1.1% | +2.2% | −1.9 pts | 31% |
| 3 months | +32.8% | +18.9% | +37.9% | −5.0 pts | 24% |
| 6 months | +39.6% | +22.7% | +45.4% | −5.8 pts | 24% |
| 1 year | +86.1% | +41.5% | +83.0% | +3.1 pts | 22% |
| 3 years | +117.8% | +60.5% | +121.1% | −3.3 pts | 21% |
| Since launch | +1404.7% | +588.6% | 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 | +1.73 times, against +2 stated | ETFIQ |
| Underlying | IBB | ETFIQ |
| Segment | sector or country, sector | ETFIQ |
| Net assets | $95m | issuer page, as of Sep 11, 2026 |
| Expense ratio | 0.95% | 485BPOS XBRL, Sep 23, 2025 |
| 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 11, 2026, IBB moved +18.9% and BIB returned +32.8%. 2 times that move is +37.9%, so the fund came out 5.0 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 11, 2026. https://etfiq.com/funds/BIB
Free to use with attribution; the underlying files are at https://etfiq.com/data/.

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