CIEN
Ciena CorporationStock · UtilitiesS&P 500 Equal Weight 0.3% · S&P 500 0.1% · Russell 1000 0.10% · US Stock Market 0.10% · Russell 3000 0.10% · MSCI World 0.09% · MSCI ACWI 0.08%$348.80+1.32%
as of market close, Sep 18, 2026
☾ AH $349.09 +0.08%
Ciena Corporation monthly returns
Ciena Corporation has averaged 1.86% per month, positive in 54% of months. Month-by-month returns for Ciena Corporation (CIEN) below, through September 18, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.
Average month
+1.9%
345 months
Best month
+143.5%
Feb 2000
Worst month
-62.0%
Aug 1998
Positive months
54%
of all months
Ciena Corporation monthly returns#
| Month | Path | Total return |
|---|---|---|
| Sep 2026 | -8.9% | |
| Aug 2026 | +1.5% | |
| Jul 2026 | -23.1% | |
| Jun 2026 | -15.5% | |
| May 2026 | +10.0% | |
| Apr 2026 | +35.9% | |
| Mar 2026 | +11.3% | |
| Feb 2026 | +38.5% | |
| Jan 2026 | +7.7% | |
| Dec 2025 | +14.5% | |
| Nov 2025 | +7.5% | |
| Oct 2025 | +30.4% | |
| Sep 2025 | +55.0% | |
| Aug 2025 | +1.2% | |
| Jul 2025 | +14.2% | |
| Jun 2025 | +1.6% | |
| May 2025 | +19.2% | |
| Apr 2025 | +11.1% | |
| Mar 2025 | -24.1% | |
| Feb 2025 | -8.7% | |
| Jan 2025 | +2.7% | |
| Dec 2024 | +21.6% | |
| Nov 2024 | +9.8% | |
| Oct 2024 | +3.1% | |
| Sep 2024 | +6.8% | |
| Aug 2024 | +9.3% | |
| Jul 2024 | +9.5% | |
| Jun 2024 | +0.0% | |
| May 2024 | +4.2% | |
| Apr 2024 | -6.5% | |
| Mar 2024 | -13.2% | |
| Feb 2024 | +7.5% | |
| Jan 2024 | +17.8% | |
| Dec 2023 | -1.8% | |
| Nov 2023 | +8.6% | |
| Oct 2023 | -10.7% | |
| Sep 2023 | -5.4% | |
| Aug 2023 | +18.4% | |
| Jul 2023 | -0.7% | |
| Jun 2023 | -9.1% | |
| May 2023 | +1.5% | |
| Apr 2023 | -12.3% | |
| Mar 2023 | +8.9% | |
| Feb 2023 | -7.3% | |
| Jan 2023 | +2.0% | |
| Dec 2022 | +13.4% | |
| Nov 2022 | -6.1% | |
| Oct 2022 | +18.5% | |
| Sep 2022 | -20.3% | |
| Aug 2022 | -1.7% | |
| Jul 2022 | +12.9% | |
| Jun 2022 | -10.1% | |
| May 2022 | -7.9% | |
| Apr 2022 | -9.0% | |
| Mar 2022 | -11.4% | |
| Feb 2022 | +3.2% | |
| Jan 2022 | -13.8% | |
| Dec 2021 | +27.8% | |
| Nov 2021 | +10.9% | |
| Oct 2021 | +5.7% | |
| Sep 2021 | -10.1% | |
| Aug 2021 | -1.7% | |
| Jul 2021 | +2.2% | |
| Jun 2021 | +7.6% | |
| May 2021 | +4.8% | |
| Apr 2021 | -7.8% | |
| Mar 2021 | +4.9% | |
| Feb 2021 | -2.3% | |
| Jan 2021 | +1.0% | |
| Dec 2020 | +18.0% | |
| Nov 2020 | +13.7% | |
| Oct 2020 | -0.8% | |
| Sep 2020 | -30.1% | |
| Aug 2020 | -4.6% | |
| Jul 2020 | +9.9% | |
| Jun 2020 | -2.0% | |
| May 2020 | +19.5% | |
| Apr 2020 | +16.2% | |
| Mar 2020 | +3.5% | |
| Feb 2020 | -5.5% | |
| Jan 2020 | -4.7% | |
| Dec 2019 | +12.5% | |
| Nov 2019 | +2.3% | |
| Oct 2019 | -5.4% | |
| Sep 2019 | -4.2% | |
| Aug 2019 | -9.5% | |
| Jul 2019 | +9.9% | |
| Jun 2019 | +17.7% | |
| May 2019 | -8.9% | |
| Apr 2019 | +2.7% | |
| Mar 2019 | -12.5% | |
| Feb 2019 | +12.0% | |
| Jan 2019 | +12.3% | |
| Dec 2018 | +4.0% | |
| Nov 2018 | +4.4% | |
| Oct 2018 | +0.1% | |
| Sep 2018 | -1.1% | |
| Aug 2018 | +24.3% | |
| Jul 2018 | -4.2% | |
| Jun 2018 | +15.0% | |
| May 2018 | -10.5% | |
| Apr 2018 | -0.6% | |
| Mar 2018 | +11.8% | |
| Feb 2018 | +8.9% | |
| Jan 2018 | +1.7% | |
| Dec 2017 | -3.8% | |
| Nov 2017 | +2.3% | |
| Oct 2017 | -3.2% | |
| Sep 2017 | +1.7% | |
| Aug 2017 | -16.1% | |
| Jul 2017 | +2.9% | |
| Jun 2017 | +6.6% | |
| May 2017 | +2.5% | |
| Apr 2017 | -3.0% | |
| Mar 2017 | -10.4% | |
| Feb 2017 | +8.2% | |
| Jan 2017 | -0.3% | |
| Dec 2016 | +13.8% | |
| Nov 2016 | +10.7% | |
| Oct 2016 | -11.1% |
Monthly total return (since Oct 2021)#
-40%-20%0%20%40%
Oct 2021+5.7%
Nov 2021+11%
Dec 2021+28%
Jan 2022-14%2022
Feb 2022+3.2%
Mar 2022-11%
Apr 2022-9.0%
May 2022-7.9%
Jun 2022-10%
Jul 2022+13%
Aug 2022-1.7%
Sep 2022-20%
Oct 2022+18%
Nov 2022-6.1%
Dec 2022+13%
Jan 2023+2.0%2023
Feb 2023-7.3%
Mar 2023+8.9%
Apr 2023-12%
May 2023+1.5%
Jun 2023-9.1%
Jul 2023-0.68%
Aug 2023+18%
Sep 2023-5.4%
Oct 2023-11%
Nov 2023+8.6%
Dec 2023-1.8%
Jan 2024+18%2024
Feb 2024+7.5%
Mar 2024-13%
Apr 2024-6.5%
May 2024+4.2%
Jun 2024+0.02%
Jul 2024+9.5%
Aug 2024+9.3%
Sep 2024+6.8%
Oct 2024+3.1%
Nov 2024+9.8%
Dec 2024+22%
Jan 2025+2.7%2025
Feb 2025-8.7%
Mar 2025-24%
Apr 2025+11%
May 2025+19%
Jun 2025+1.6%
Jul 2025+14%
Aug 2025+1.2%
Sep 2025+55%
Oct 2025+30%
Nov 2025+7.5%
Dec 2025+15%
Jan 2026+7.7%2026
Feb 2026+38%
Mar 2026+11%
Apr 2026+36%
May 2026+10.0%
Jun 2026-15%
Jul 2026-23%
Aug 2026+1.5%
Sep 2026-8.9%
Methodology#
Monthly returns are total returns (dividends reinvested), computed from CIEN'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 Ciena Corporation's average monthly return?
- Ciena Corporation (CIEN) has averaged about 1.86% per month, positive in roughly 54% of months. The best month was Feb 2000 (+143.5%) and the worst was Aug 1998 (-62.0%).
More on Ciena Corporation
By month for: S&P 500 · S&P 500 Equal Weight · US Stock Market · Nasdaq-100