What is the current 10-day volatility of CIEN?

As of today, CIEN 10-day volatility is 89.25%

What 10-day volatility category does CIEN fall into?

Based on its current 10-day historical volatility, CIEN falls into the extreme volatility category

What is CIEN 10-day volatility 1-year high?

CIEN 10-day volatility reached a 1-year high of 119.96% on September 12, 2025

What is CIEN 10-day volatility 1-year low?

CIEN 10-day volatility reached a 1-year low of 21.27% on September 30, 2025

What is the current 1-month volatility of CIEN?

As of today, CIEN 1-month volatility is 89.73%

What 1-month volatility category does CIEN fall into?

Based on its current 1-month historical volatility, CIEN falls into the extreme volatility category

What is CIEN 1-month volatility 1-year high?

CIEN 1-month volatility reached a 1-year high of 103.68% on April 2, 2026

What is CIEN 1-month volatility 1-year low?

CIEN 1-month volatility reached a 1-year low of 30.07% on October 6, 2025

What is the current 3-month volatility of CIEN?

As of today, CIEN 3-month volatility is 81.85%

What 3-month volatility category does CIEN fall into?

Based on its current 3-month historical volatility, CIEN falls into the extreme volatility category

What is CIEN 3-month volatility 1-year high?

CIEN 3-month volatility reached a 1-year high of 84.44% on June 4, 2026

What is CIEN 3-month volatility 1-year low?

CIEN 3-month volatility reached a 1-year low of 40.76% on August 19, 2025

What is the current 1-year volatility of CIEN?

As of today, CIEN 1-year volatility is 73.70%

What 1-year volatility category does CIEN fall into?

Based on its current 1-year historical volatility, CIEN falls into the extreme volatility category

What is CIEN 1-year volatility 1-year high?

CIEN 1-year volatility reached a 1-year high of 73.70% on August 19, 2026

What is CIEN 1-year volatility 1-year low?

CIEN 1-year volatility reached a 1-year low of 53.81% on August 25, 2025

CIEN Stock Volatility History & Chart Since 1997

10-Day

89.25%

August 18, 2026

Summary

Current Value: As of today, CIEN 10-day volatility is 89.25%, up +15.74% on August 18, 2026
Value Category: Based on its current 10-day historical volatility, CIEN falls into the extreme volatility category
1-Year High: CIEN 10-day volatility reached a 1-year high of 119.96% on September 12, 2025
1-Year Low: CIEN 10-day volatility reached a 1-year low of 21.27% on September 30, 2025

10-Day Volatility Chart

Performance

CIEN Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Aug 18, 26	89.25%	+15.7%	+28.0%	+18.2%	+62.2%	+134.7%	+267.9%	+989.7%
1-Month Volatility	Aug 18, 26	89.73%	+5.1%	+24.4%	+31.2%	+30.5%	+139.9%	+278.8%	+492.7%
3-Month Volatility	Aug 18, 26	81.85%	+1.9%	+10.2%	+3.5%	+41.7%	+100.8%	+119.3%	+249.2%
1-Year Volatility	Aug 18, 26	73.70%	+0.9%	+5.6%	+14.6%	+21.0%	+36.9%	+82.3%	+93.9%
14-Day RSI	Aug 18, 26	48.12	-15.7%	+47.0%	-11.3%	-20.1%	-0.7%	+7.2%	+27.9%
Beta	Aug 18, 26	2.70	+2.3%	+5.9%	+4.7%	+39.2%	+56.1%	+145.4%	+98.5%
ATR	Aug 18, 26	$32.87	+5.0%	-0.0%	-8.2%	+214.5%	+1028.3%	+3010.3%	+3209.8%
Price	Aug 19, 26	$397.88	-1.9%	+6.3%	-26.6%	+70.1%	+348.2%	+864.6%	+623.9%
200-Day SMA	Aug 18, 26	$365.56	+0.3%	+7.5%	+37.8%	+204.2%	+373.1%	+685.5%	+587.4%
50-Day SMA	Aug 18, 26	$424.61	-0.4%	-15.1%	-9.6%	+108.9%	+406.0%	+905.6%	+647.1%
20-Day SMA	Aug 18, 26	$397.97	-0.0%	-10.8%	-26.0%	+79.2%	+333.8%	+851.4%	+603.3%

10-Day Volatility History

Date	Value	Change
Aug 19, 2026	89.25%	+62.2%
Dec 31, 2025	55.02%	+54.0%
Dec 31, 2024	35.72%	+84.6%
Dec 31, 2023	19.35%	-0.8%
Dec 31, 2022	19.51%	+64.5%
Dec 31, 2021	11.86%	-56.0%
Dec 31, 2020	26.94%	+99.4%
Dec 31, 2019	13.51%	-71.1%
Dec 31, 2018	46.78%	+172.5%
Dec 31, 2017	17.17%	-46.5%
Dec 31, 2016	32.12%	+55.1%
Dec 31, 2015	20.71%	-18.1%
Dec 31, 2014	25.28%	-3.1%
Dec 31, 2013	26.09%	-1.8%
Dec 31, 2012	26.56%	-64.3%

Date	Value	Change
Dec 31, 2011	74.41%	+144.9%
Dec 31, 2010	30.39%	-4.9%
Dec 31, 2009	31.95%	-51.8%
Dec 31, 2008	66.33%	+119.4%
Dec 31, 2007	30.23%	-16.7%
Dec 31, 2006	36.31%	-44.0%
Dec 31, 2005	64.82%	-23.0%
Dec 31, 2004	84.16%	+89.0%
Dec 31, 2003	44.52%	-23.3%
Dec 31, 2002	58.04%	+11.2%
Dec 31, 2001	52.21%	-76.5%
Dec 31, 2000	221.97%	+273.7%
Dec 31, 1999	59.39%	-24.1%
Dec 31, 1998	78.25%	+110.2%
Dec 31, 1997	37.23%	-

FAQ

What is the current 10-day volatility of CIEN?: As of today, CIEN 10-day volatility is 89.25%
What 10-day volatility category does CIEN fall into?: Based on its current 10-day historical volatility, CIEN falls into the extreme volatility category
What is CIEN 10-day volatility 1-year high?: CIEN 10-day volatility reached a 1-year high of 119.96% on September 12, 2025
What is CIEN 10-day volatility 1-year low?: CIEN 10-day volatility reached a 1-year low of 21.27% on September 30, 2025

1-Month

89.73%

August 18, 2026

Summary

Current Value: As of today, CIEN 1-month volatility is 89.73%, up +5.13% on August 18, 2026
Value Category: Based on its current 1-month historical volatility, CIEN falls into the extreme volatility category
1-Year High: CIEN 1-month volatility reached a 1-year high of 103.68% on April 2, 2026
1-Year Low: CIEN 1-month volatility reached a 1-year low of 30.07% on October 6, 2025

Performance

CIEN Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Aug 18, 26	89.73%	+5.1%	+24.4%	+31.2%	+30.5%	+139.9%	+278.8%	+492.7%
10-Day Volatility	Aug 18, 26	89.25%	+15.7%	+28.0%	+18.2%	+62.2%	+134.7%	+267.9%	+989.7%
3-Month Volatility	Aug 18, 26	81.85%	+1.9%	+10.2%	+3.5%	+41.7%	+100.8%	+119.3%	+249.2%
1-Year Volatility	Aug 18, 26	73.70%	+0.9%	+5.6%	+14.6%	+21.0%	+36.9%	+82.3%	+93.9%
14-Day RSI	Aug 18, 26	48.12	-15.7%	+47.0%	-11.3%	-20.1%	-0.7%	+7.2%	+27.9%
Beta	Aug 18, 26	2.70	+2.3%	+5.9%	+4.7%	+39.2%	+56.1%	+145.4%	+98.5%
ATR	Aug 18, 26	$32.87	+5.0%	-0.0%	-8.2%	+214.5%	+1028.3%	+3010.3%	+3209.8%
Price	Aug 19, 26	$397.88	-1.9%	+6.3%	-26.6%	+70.1%	+348.2%	+864.6%	+623.9%
200-Day SMA	Aug 18, 26	$365.56	+0.3%	+7.5%	+37.8%	+204.2%	+373.1%	+685.5%	+587.4%
50-Day SMA	Aug 18, 26	$424.61	-0.4%	-15.1%	-9.6%	+108.9%	+406.0%	+905.6%	+647.1%
20-Day SMA	Aug 18, 26	$397.97	-0.0%	-10.8%	-26.0%	+79.2%	+333.8%	+851.4%	+603.3%

1-Month Volatility History

Date	Value	Change
Aug 19, 2026	89.73%	+32.7%
Dec 31, 2025	67.61%	+2.3%
Dec 31, 2024	66.08%	+139.1%
Dec 31, 2023	27.64%	-62.8%
Dec 31, 2022	74.34%	+35.3%
Dec 31, 2021	54.93%	+97.7%
Dec 31, 2020	27.78%	-63.2%
Dec 31, 2019	75.40%	+41.3%
Dec 31, 2018	53.36%	+146.5%
Dec 31, 2017	21.65%	-64.8%
Dec 31, 2016	61.47%	+0.1%
Dec 31, 2015	61.39%	+64.8%
Dec 31, 2014	37.26%	-11.7%
Dec 31, 2013	42.19%	+39.8%
Dec 31, 2012	30.18%	-50.5%

Date	Value	Change
Dec 31, 2011	60.93%	-0.8%
Dec 31, 2010	61.45%	+7.5%
Dec 31, 2009	57.14%	-49.5%
Dec 31, 2008	113.23%	+112.0%
Dec 31, 2007	53.40%	-6.3%
Dec 31, 2006	57.00%	+15.0%
Dec 31, 2005	49.57%	-50.3%
Dec 31, 2004	99.76%	+126.5%
Dec 31, 2003	44.04%	-58.6%
Dec 31, 2002	106.29%	+14.2%
Dec 31, 2001	93.10%	-51.8%
Dec 31, 2000	193.06%	+73.2%
Dec 31, 1999	111.47%	+43.3%
Dec 31, 1998	77.80%	+84.9%
Dec 31, 1997	42.08%	-

FAQ

What is the current 1-month volatility of CIEN?: As of today, CIEN 1-month volatility is 89.73%
What 1-month volatility category does CIEN fall into?: Based on its current 1-month historical volatility, CIEN falls into the extreme volatility category
What is CIEN 1-month volatility 1-year high?: CIEN 1-month volatility reached a 1-year high of 103.68% on April 2, 2026
What is CIEN 1-month volatility 1-year low?: CIEN 1-month volatility reached a 1-year low of 30.07% on October 6, 2025

3-Month

81.85%

August 18, 2026

Summary

Current Value: As of today, CIEN 3-month volatility is 81.85%, up +1.93% on August 18, 2026
Value Category: Based on its current 3-month historical volatility, CIEN falls into the extreme volatility category
1-Year High: CIEN 3-month volatility reached a 1-year high of 84.44% on June 4, 2026
1-Year Low: CIEN 3-month volatility reached a 1-year low of 40.76% on August 19, 2025

Performance

CIEN Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Aug 18, 26	81.85%	+1.9%	+10.2%	+3.5%	+41.7%	+100.8%	+119.3%	+249.2%
10-Day Volatility	Aug 18, 26	89.25%	+15.7%	+28.0%	+18.2%	+62.2%	+134.7%	+267.9%	+989.7%
1-Month Volatility	Aug 18, 26	89.73%	+5.1%	+24.4%	+31.2%	+30.5%	+139.9%	+278.8%	+492.7%
1-Year Volatility	Aug 18, 26	73.70%	+0.9%	+5.6%	+14.6%	+21.0%	+36.9%	+82.3%	+93.9%
14-Day RSI	Aug 18, 26	48.12	-15.7%	+47.0%	-11.3%	-20.1%	-0.7%	+7.2%	+27.9%
Beta	Aug 18, 26	2.70	+2.3%	+5.9%	+4.7%	+39.2%	+56.1%	+145.4%	+98.5%
ATR	Aug 18, 26	$32.87	+5.0%	-0.0%	-8.2%	+214.5%	+1028.3%	+3010.3%	+3209.8%
Price	Aug 19, 26	$397.88	-1.9%	+6.3%	-26.6%	+70.1%	+348.2%	+864.6%	+623.9%
200-Day SMA	Aug 18, 26	$365.56	+0.3%	+7.5%	+37.8%	+204.2%	+373.1%	+685.5%	+587.4%
50-Day SMA	Aug 18, 26	$424.61	-0.4%	-15.1%	-9.6%	+108.9%	+406.0%	+905.6%	+647.1%
20-Day SMA	Aug 18, 26	$397.97	-0.0%	-10.8%	-26.0%	+79.2%	+333.8%	+851.4%	+603.3%

3-Month Volatility History

Date	Value	Change
Aug 19, 2026	81.85%	+41.8%
Dec 31, 2025	57.71%	+19.9%
Dec 31, 2024	48.15%	+64.5%
Dec 31, 2023	29.27%	-46.5%
Dec 31, 2022	54.74%	+43.3%
Dec 31, 2021	38.19%	+43.1%
Dec 31, 2020	26.68%	-44.9%
Dec 31, 2019	48.40%	+15.8%
Dec 31, 2018	41.80%	+54.2%
Dec 31, 2017	27.10%	-39.5%
Dec 31, 2016	44.80%	-0.5%
Dec 31, 2015	45.03%	+6.0%
Dec 31, 2014	42.50%	+4.9%
Dec 31, 2013	40.51%	+2.1%
Dec 31, 2012	39.67%	-41.2%

Date	Value	Change
Dec 31, 2011	67.45%	+43.6%
Dec 31, 2010	46.96%	-20.0%
Dec 31, 2009	58.73%	-47.2%
Dec 31, 2008	111.16%	+109.3%
Dec 31, 2007	53.11%	+14.2%
Dec 31, 2006	46.52%	-9.6%
Dec 31, 2005	51.46%	-24.9%
Dec 31, 2004	68.49%	+61.9%
Dec 31, 2003	42.31%	-64.8%
Dec 31, 2002	120.14%	-4.9%
Dec 31, 2001	126.39%	-16.3%
Dec 31, 2000	150.99%	+49.8%
Dec 31, 1999	100.79%	-22.6%
Dec 31, 1998	130.30%	+140.9%
Dec 31, 1997	54.08%	-

FAQ

What is the current 3-month volatility of CIEN?: As of today, CIEN 3-month volatility is 81.85%
What 3-month volatility category does CIEN fall into?: Based on its current 3-month historical volatility, CIEN falls into the extreme volatility category
What is CIEN 3-month volatility 1-year high?: CIEN 3-month volatility reached a 1-year high of 84.44% on June 4, 2026
What is CIEN 3-month volatility 1-year low?: CIEN 3-month volatility reached a 1-year low of 40.76% on August 19, 2025

1-Year

73.70%

August 18, 2026

Summary

Current Value: As of today, CIEN 1-year volatility is 73.70%, up +0.90% on August 18, 2026
Value Category: Based on its current 1-year historical volatility, CIEN falls into the extreme volatility category
1-Year High: CIEN 1-year volatility reached a 1-year high of 73.70% on August 19, 2026
1-Year Low: CIEN 1-year volatility reached a 1-year low of 53.81% on August 25, 2025

Performance

CIEN Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Aug 18, 26	73.70%	+0.9%	+5.6%	+14.6%	+21.0%	+36.9%	+82.3%	+93.9%
10-Day Volatility	Aug 18, 26	89.25%	+15.7%	+28.0%	+18.2%	+62.2%	+134.7%	+267.9%	+989.7%
1-Month Volatility	Aug 18, 26	89.73%	+5.1%	+24.4%	+31.2%	+30.5%	+139.9%	+278.8%	+492.7%
3-Month Volatility	Aug 18, 26	81.85%	+1.9%	+10.2%	+3.5%	+41.7%	+100.8%	+119.3%	+249.2%
1-Year Volatility	Aug 18, 26	73.70%	+0.9%	+5.6%	+14.6%	+21.0%	+36.9%	+82.3%	+93.9%
14-Day RSI	Aug 18, 26	48.12	-15.7%	+47.0%	-11.3%	-20.1%	-0.7%	+7.2%	+27.9%
Beta	Aug 18, 26	2.70	+2.3%	+5.9%	+4.7%	+39.2%	+56.1%	+145.4%	+98.5%
ATR	Aug 18, 26	$32.87	+5.0%	-0.0%	-8.2%	+214.5%	+1028.3%	+3010.3%	+3209.8%
Price	Aug 19, 26	$397.88	-1.9%	+6.3%	-26.6%	+70.1%	+348.2%	+864.6%	+623.9%
200-Day SMA	Aug 18, 26	$365.56	+0.3%	+7.5%	+37.8%	+204.2%	+373.1%	+685.5%	+587.4%
50-Day SMA	Aug 18, 26	$424.61	-0.4%	-15.1%	-9.6%	+108.9%	+406.0%	+905.6%	+647.1%
20-Day SMA	Aug 18, 26	$397.97	-0.0%	-10.8%	-26.0%	+79.2%	+333.8%	+851.4%	+603.3%

1-Year Volatility History

Date	Value	Change
Aug 19, 2026	73.70%	+21.0%
Dec 31, 2025	60.90%	+50.0%
Dec 31, 2024	40.61%	+19.4%
Dec 31, 2023	34.00%	-23.1%
Dec 31, 2022	44.19%	+40.9%
Dec 31, 2021	31.36%	-36.5%
Dec 31, 2020	49.37%	+12.6%
Dec 31, 2019	43.84%	+31.9%
Dec 31, 2018	33.23%	+0.8%
Dec 31, 2017	32.98%	-25.0%
Dec 31, 2016	43.96%	+24.5%
Dec 31, 2015	35.31%	-15.8%
Dec 31, 2014	41.96%	-8.6%
Dec 31, 2013	45.92%	-11.2%
Dec 31, 2012	51.71%	-25.6%

Date	Value	Change
Dec 31, 2011	69.48%	+47.5%
Dec 31, 2010	47.12%	-34.9%
Dec 31, 2009	72.33%	-9.6%
Dec 31, 2008	80.01%	+77.6%
Dec 31, 2007	45.06%	-18.8%
Dec 31, 2006	55.48%	+3.3%
Dec 31, 2005	53.73%	-20.7%
Dec 31, 2004	67.73%	+16.2%
Dec 31, 2003	58.31%	-41.2%
Dec 31, 2002	99.10%	-18.3%
Dec 31, 2001	121.29%	+1.2%
Dec 31, 2000	119.81%	+30.8%
Dec 31, 1999	91.59%	-24.8%
Dec 31, 1998	121.73%	+60.1%
Dec 31, 1997	76.03%	-

FAQ

What is the current 1-year volatility of CIEN?: As of today, CIEN 1-year volatility is 73.70%
What 1-year volatility category does CIEN fall into?: Based on its current 1-year historical volatility, CIEN falls into the extreme volatility category
What is CIEN 1-year volatility 1-year high?: CIEN 1-year volatility reached a 1-year high of 73.70% on August 19, 2026
What is CIEN 1-year volatility 1-year low?: CIEN 1-year volatility reached a 1-year low of 53.81% on August 25, 2025

Data Sources & References

CIEN Official Website www.ciena.com
CIEN Profile on Yahoo Finance finance.yahoo.com/quote/CIEN
CIEN Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/cien