IBB
iShares Biotechnology ETFETF · Themes$188.14−$0.84 (-0.44%)as of market close, Jul 24, 2026
IBB weekly returns
iShares Biotechnology ETF has averaged 0.19% per week, positive in 55% of weeks. Week-by-week returns for iShares Biotechnology ETF (IBB) below, through July 24, 2026 — the table lists the most recent weeks; the bar chart plots the last 2 years.
Average week
+0.2%
1327 weeks
Best week
+14.4%
Nov 11, 2016
Worst week
-17.1%
Sep 21, 2001
Positive weeks
55%
of all weeks
iShares Biotechnology ETF weekly returns#
| Week ending | Path | Total return |
|---|---|---|
| Jul 24, 2026 | -0.9% | |
| Jul 17, 2026 | -1.2% | |
| Jul 10, 2026 | -1.9% | |
| Jul 2, 2026 | +4.5% | |
| Jun 26, 2026 | +7.9% | |
| Jun 18, 2026 | +1.8% | |
| Jun 12, 2026 | +1.3% | |
| Jun 5, 2026 | -2.2% | |
| May 29, 2026 | +2.0% | |
| May 22, 2026 | +1.2% | |
| May 15, 2026 | -1.8% | |
| May 8, 2026 | +1.6% |
Weekly total return (since Aug 2, 2024)
-10%-5%+0%+5%+10%
20252026
Methodology#
Weekly returns are total returns (dividends reinvested), computed from IBB's split- and dividend-adjusted weekly (ISO week) closes. The table shows the most recent 260 weeks and the bar chart the most recent 104. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.
See also: S&P 500 · Nasdaq-100 · Dow Jones · Russell 2000 · US Bond Market · Gold · Silver · Bitcoin · Ethereum
FAQ
- What is iShares Biotechnology ETF's average weekly return?
- iShares Biotechnology ETF (IBB) has averaged about 0.19% per week, positive in roughly 55% of weeks. The best week was Nov 11, 2016 (+14.4%) and the worst was Sep 21, 2001 (-17.1%).