IBB
iShares Biotechnology ETFETF · Themes$202.93+0.14%
as of market close, Sep 11, 2026
☾ AH — —
iShares Biotechnology ETF monthly returns
iShares Biotechnology ETF has averaged 0.83% per month, positive in 56% of months. Month-by-month returns for iShares Biotechnology ETF (IBB) below, through September 11, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.
Average month
+0.8%
297 months
Best month
+18.8%
May 2003
Worst month
-21.1%
Jan 2016
Positive months
56%
of all months
iShares Biotechnology ETF monthly returns#
| Month | Path | Total return |
|---|---|---|
| Sep 2026 | -2.9% | |
| Aug 2026 | +12.1% | |
| Jul 2026 | -2.5% | |
| Jun 2026 | +11.0% | |
| May 2026 | +2.1% | |
| Apr 2026 | -0.1% | |
| Mar 2026 | -3.6% | |
| Feb 2026 | +1.7% | |
| Jan 2026 | +2.2% | |
| Dec 2025 | -2.8% | |
| Nov 2025 | +9.1% | |
| Oct 2025 | +10.4% | |
| Sep 2025 | +4.5% | |
| Aug 2025 | +4.1% | |
| Jul 2025 | +4.9% | |
| Jun 2025 | +3.9% | |
| May 2025 | -3.8% | |
| Apr 2025 | -1.0% | |
| Mar 2025 | -6.6% | |
| Feb 2025 | -1.2% | |
| Jan 2025 | +4.9% | |
| Dec 2024 | -6.6% | |
| Nov 2024 | +0.9% | |
| Oct 2024 | -3.6% | |
| Sep 2024 | -1.6% | |
| Aug 2024 | +0.1% | |
| Jul 2024 | +7.8% | |
| Jun 2024 | +2.5% | |
| May 2024 | +5.5% | |
| Apr 2024 | -7.5% | |
| Mar 2024 | +0.4% | |
| Feb 2024 | +1.8% | |
| Jan 2024 | -1.1% | |
| Dec 2023 | +12.4% | |
| Nov 2023 | +6.4% | |
| Oct 2023 | -7.0% | |
| Sep 2023 | -4.9% | |
| Aug 2023 | -0.5% | |
| Jul 2023 | +1.9% | |
| Jun 2023 | +0.5% | |
| May 2023 | -3.2% | |
| Apr 2023 | +1.0% | |
| Mar 2023 | +1.6% | |
| Feb 2023 | -6.9% | |
| Jan 2023 | +4.0% | |
| Dec 2022 | -3.8% | |
| Nov 2022 | +6.2% | |
| Oct 2022 | +9.9% | |
| Sep 2022 | -3.6% | |
| Aug 2022 | -2.1% | |
| Jul 2022 | +5.5% | |
| Jun 2022 | +0.8% | |
| May 2022 | +0.0% | |
| Apr 2022 | -10.5% | |
| Mar 2022 | +3.5% | |
| Feb 2022 | -4.4% | |
| Jan 2022 | -13.6% | |
| Dec 2021 | -1.0% | |
| Nov 2021 | -3.4% | |
| Oct 2021 | -1.3% | |
| Sep 2021 | -6.1% | |
| Aug 2021 | +3.9% | |
| Jul 2021 | +1.3% | |
| Jun 2021 | +7.7% | |
| May 2021 | -1.7% | |
| Apr 2021 | +2.7% | |
| Mar 2021 | -4.0% | |
| Feb 2021 | -2.3% | |
| Jan 2021 | +6.0% | |
| Dec 2020 | +4.5% | |
| Nov 2020 | +11.0% | |
| Oct 2020 | -3.5% | |
| Sep 2020 | -0.1% | |
| Aug 2020 | +0.9% | |
| Jul 2020 | -1.7% | |
| Jun 2020 | +1.5% | |
| May 2020 | +8.7% | |
| Apr 2020 | +15.1% | |
| Mar 2020 | -5.3% | |
| Feb 2020 | +0.1% | |
| Jan 2020 | -5.6% | |
| Dec 2019 | +0.8% | |
| Nov 2019 | +11.5% | |
| Oct 2019 | +7.9% | |
| Sep 2019 | -3.3% | |
| Aug 2019 | -2.6% | |
| Jul 2019 | -3.2% | |
| Jun 2019 | +9.2% | |
| May 2019 | -6.1% | |
| Apr 2019 | -4.8% | |
| Mar 2019 | -0.8% | |
| Feb 2019 | +2.8% | |
| Jan 2019 | +13.8% | |
| Dec 2018 | -11.6% | |
| Nov 2018 | +4.8% | |
| Oct 2018 | -14.7% | |
| Sep 2018 | -0.2% | |
| Aug 2018 | +4.9% | |
| Jul 2018 | +6.1% | |
| Jun 2018 | +1.4% | |
| May 2018 | +4.6% | |
| Apr 2018 | -2.9% | |
| Mar 2018 | -1.2% | |
| Feb 2018 | -5.3% | |
| Jan 2018 | +6.8% | |
| Dec 2017 | +1.6% | |
| Nov 2017 | +0.5% | |
| Oct 2017 | -5.8% | |
| Sep 2017 | +0.1% | |
| Aug 2017 | +4.5% | |
| Jul 2017 | +2.9% | |
| Jun 2017 | +8.6% | |
| May 2017 | -4.0% | |
| Apr 2017 | +1.5% | |
| Mar 2017 | -1.2% | |
| Feb 2017 | +6.9% | |
| Jan 2017 | +4.8% | |
| Dec 2016 | -3.1% | |
| Nov 2016 | +6.8% | |
| Oct 2016 | -11.3% |
Monthly total return (since Oct 2021)#
-10%-5%0%5%10%
Oct 2021-1.3%
Nov 2021-3.4%
Dec 2021-1.0%
Jan 2022-14%2022
Feb 2022-4.4%
Mar 2022+3.5%
Apr 2022-10%
May 2022+0.02%
Jun 2022+0.85%
Jul 2022+5.5%
Aug 2022-2.1%
Sep 2022-3.6%
Oct 2022+9.9%
Nov 2022+6.2%
Dec 2022-3.8%
Jan 2023+4.0%2023
Feb 2023-6.9%
Mar 2023+1.6%
Apr 2023+1.0%
May 2023-3.2%
Jun 2023+0.54%
Jul 2023+1.9%
Aug 2023-0.46%
Sep 2023-4.9%
Oct 2023-7.0%
Nov 2023+6.4%
Dec 2023+12%
Jan 2024-1.1%2024
Feb 2024+1.8%
Mar 2024+0.37%
Apr 2024-7.5%
May 2024+5.5%
Jun 2024+2.5%
Jul 2024+7.8%
Aug 2024+0.14%
Sep 2024-1.6%
Oct 2024-3.6%
Nov 2024+0.9%
Dec 2024-6.6%
Jan 2025+4.9%2025
Feb 2025-1.2%
Mar 2025-6.6%
Apr 2025-1.0%
May 2025-3.8%
Jun 2025+3.9%
Jul 2025+4.9%
Aug 2025+4.1%
Sep 2025+4.5%
Oct 2025+10%
Nov 2025+9.1%
Dec 2025-2.8%
Jan 2026+2.2%2026
Feb 2026+1.7%
Mar 2026-3.6%
Apr 2026-0.09%
May 2026+2.1%
Jun 2026+11%
Jul 2026-2.5%
Aug 2026+12%
Sep 2026-2.9%
Methodology#
Monthly returns are total returns (dividends reinvested), computed from IBB's split- and dividend-adjusted month-end closes. The table shows the most recent 120 months and the bar chart the most recent 60. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.
FAQ#
- What is iShares Biotechnology ETF's average monthly return?
- iShares Biotechnology ETF (IBB) has averaged about 0.83% per month, positive in roughly 56% of months. The best month was May 2003 (+18.8%) and the worst was Jan 2016 (-21.1%).
More on iShares Biotechnology ETF
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