What is the current 10-day volatility of CIEN?

As of today, CIEN 10-day volatility is 41.66%

What 10-day volatility category does CIEN fall into?

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

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

CIEN 10-day volatility reached a 1-year high of 116.41% on April 9, 2026

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 66.60%

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 75.68%

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 46.85% on December 10, 2025

What is the current 1-year volatility of CIEN?

As of today, CIEN 1-year volatility is 72.60%

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 74.95% on September 3, 2026

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

CIEN 1-year volatility reached a 1-year low of 58.15% on October 7, 2025

CIEN Stock Volatility History & Chart Since 1997

10-Day

41.66%

September 30, 2026

Summary

Current Value: As of today, CIEN 10-day volatility is 41.66%, up +0.02% on September 30, 2026
Value Category: Based on its current 10-day historical volatility, CIEN falls into the high volatility category
1-Year High: CIEN 10-day volatility reached a 1-year high of 116.41% on April 9, 2026
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	Sep 30, 26	41.66%	+0.0%	-42.6%	-32.9%	-24.3%	+95.9%	+70.5%	+82.5%
1-Month Volatility	Sep 30, 26	66.60%	-2.3%	-9.9%	-22.1%	-3.2%	-18.5%	+11.3%	+157.3%
3-Month Volatility	Sep 30, 26	75.68%	-0.5%	-7.5%	+2.0%	+31.0%	+33.7%	+90.1%	+267.0%
1-Year Volatility	Sep 30, 26	72.60%	+0.1%	-2.0%	+7.5%	+19.2%	+23.7%	+76.2%	+159.1%
14-Day RSI	Sep 30, 26	47.05	-2.1%	+7.5%	-6.6%	-21.8%	-43.4%	-14.8%	+30.9%
Beta	Sep 30, 26	2.48	0.0%	-7.8%	0.0%	+27.8%	+38.5%	+125.5%	+140.8%
ATR	Sep 30, 26	$21.64	-0.8%	-22.8%	-40.3%	+107.1%	+377.9%	+1912.2%	+1790.2%
Price	Sep 30, 26	$351.82	-0.9%	-7.0%	-28.3%	+50.4%	+141.5%	+644.4%	+585.1%
200-Day SMA	Sep 30, 26	$389.61	+0.1%	+4.3%	+20.8%	+224.3%	+360.8%	+734.3%	+613.0%
50-Day SMA	Sep 30, 26	$374.65	-0.3%	-9.9%	-27.9%	+84.3%	+248.3%	+742.8%	+577.7%
20-Day SMA	Sep 30, 26	$345.01	-0.1%	-14.7%	-28.0%	+55.3%	+161.8%	+620.1%	+546.1%

10-Day Volatility History

Date	Value	Change
Sep 30, 2026	41.66%	-24.3%
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 41.66%
What 10-day volatility category does CIEN fall into?: Based on its current 10-day historical volatility, CIEN falls into the high volatility category
What is CIEN 10-day volatility 1-year high?: CIEN 10-day volatility reached a 1-year high of 116.41% on April 9, 2026
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

66.60%

September 30, 2026

Summary

Current Value: As of today, CIEN 1-month volatility is 66.60%, down -2.26% on September 30, 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	Sep 30, 26	66.60%	-2.3%	-9.9%	-22.1%	-3.2%	-18.5%	+11.3%	+157.3%
10-Day Volatility	Sep 30, 26	41.66%	+0.0%	-42.6%	-32.9%	-24.3%	+95.9%	+70.5%	+82.5%
3-Month Volatility	Sep 30, 26	75.68%	-0.5%	-7.5%	+2.0%	+31.0%	+33.7%	+90.1%	+267.0%
1-Year Volatility	Sep 30, 26	72.60%	+0.1%	-2.0%	+7.5%	+19.2%	+23.7%	+76.2%	+159.1%
14-Day RSI	Sep 30, 26	47.05	-2.1%	+7.5%	-6.6%	-21.8%	-43.4%	-14.8%	+30.9%
Beta	Sep 30, 26	2.48	0.0%	-7.8%	0.0%	+27.8%	+38.5%	+125.5%	+140.8%
ATR	Sep 30, 26	$21.64	-0.8%	-22.8%	-40.3%	+107.1%	+377.9%	+1912.2%	+1790.2%
Price	Sep 30, 26	$351.82	-0.9%	-7.0%	-28.3%	+50.4%	+141.5%	+644.4%	+585.1%
200-Day SMA	Sep 30, 26	$389.61	+0.1%	+4.3%	+20.8%	+224.3%	+360.8%	+734.3%	+613.0%
50-Day SMA	Sep 30, 26	$374.65	-0.3%	-9.9%	-27.9%	+84.3%	+248.3%	+742.8%	+577.7%
20-Day SMA	Sep 30, 26	$345.01	-0.1%	-14.7%	-28.0%	+55.3%	+161.8%	+620.1%	+546.1%

1-Month Volatility History

Date	Value	Change
Sep 30, 2026	66.54%	-1.6%
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 66.60%
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

75.68%

September 30, 2026

Summary

Current Value: As of today, CIEN 3-month volatility is 75.68%, down -0.47% on September 30, 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 46.85% on December 10, 2025

Performance

CIEN Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Sep 30, 26	75.68%	-0.5%	-7.5%	+2.0%	+31.0%	+33.7%	+90.1%	+267.0%
10-Day Volatility	Sep 30, 26	41.66%	+0.0%	-42.6%	-32.9%	-24.3%	+95.9%	+70.5%	+82.5%
1-Month Volatility	Sep 30, 26	66.60%	-2.3%	-9.9%	-22.1%	-3.2%	-18.5%	+11.3%	+157.3%
1-Year Volatility	Sep 30, 26	72.60%	+0.1%	-2.0%	+7.5%	+19.2%	+23.7%	+76.2%	+159.1%
14-Day RSI	Sep 30, 26	47.05	-2.1%	+7.5%	-6.6%	-21.8%	-43.4%	-14.8%	+30.9%
Beta	Sep 30, 26	2.48	0.0%	-7.8%	0.0%	+27.8%	+38.5%	+125.5%	+140.8%
ATR	Sep 30, 26	$21.64	-0.8%	-22.8%	-40.3%	+107.1%	+377.9%	+1912.2%	+1790.2%
Price	Sep 30, 26	$351.82	-0.9%	-7.0%	-28.3%	+50.4%	+141.5%	+644.4%	+585.1%
200-Day SMA	Sep 30, 26	$389.61	+0.1%	+4.3%	+20.8%	+224.3%	+360.8%	+734.3%	+613.0%
50-Day SMA	Sep 30, 26	$374.65	-0.3%	-9.9%	-27.9%	+84.3%	+248.3%	+742.8%	+577.7%
20-Day SMA	Sep 30, 26	$345.01	-0.1%	-14.7%	-28.0%	+55.3%	+161.8%	+620.1%	+546.1%

3-Month Volatility History

Date	Value	Change
Sep 30, 2026	75.84%	+31.4%
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 75.68%
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 46.85% on December 10, 2025

1-Year

72.60%

September 30, 2026

Summary

Current Value: As of today, CIEN 1-year volatility is 72.60%, up +0.08% on September 30, 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 74.95% on September 3, 2026
1-Year Low: CIEN 1-year volatility reached a 1-year low of 58.15% on October 7, 2025

Performance

CIEN Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Sep 30, 26	72.60%	+0.1%	-2.0%	+7.5%	+19.2%	+23.7%	+76.2%	+159.1%
10-Day Volatility	Sep 30, 26	41.66%	+0.0%	-42.6%	-32.9%	-24.3%	+95.9%	+70.5%	+82.5%
1-Month Volatility	Sep 30, 26	66.60%	-2.3%	-9.9%	-22.1%	-3.2%	-18.5%	+11.3%	+157.3%
3-Month Volatility	Sep 30, 26	75.68%	-0.5%	-7.5%	+2.0%	+31.0%	+33.7%	+90.1%	+267.0%
1-Year Volatility	Sep 30, 26	72.60%	+0.1%	-2.0%	+7.5%	+19.2%	+23.7%	+76.2%	+159.1%
14-Day RSI	Sep 30, 26	47.05	-2.1%	+7.5%	-6.6%	-21.8%	-43.4%	-14.8%	+30.9%
Beta	Sep 30, 26	2.48	0.0%	-7.8%	0.0%	+27.8%	+38.5%	+125.5%	+140.8%
ATR	Sep 30, 26	$21.64	-0.8%	-22.8%	-40.3%	+107.1%	+377.9%	+1912.2%	+1790.2%
Price	Sep 30, 26	$351.82	-0.9%	-7.0%	-28.3%	+50.4%	+141.5%	+644.4%	+585.1%
200-Day SMA	Sep 30, 26	$389.61	+0.1%	+4.3%	+20.8%	+224.3%	+360.8%	+734.3%	+613.0%
50-Day SMA	Sep 30, 26	$374.65	-0.3%	-9.9%	-27.9%	+84.3%	+248.3%	+742.8%	+577.7%
20-Day SMA	Sep 30, 26	$345.01	-0.1%	-14.7%	-28.0%	+55.3%	+161.8%	+620.1%	+546.1%

1-Year Volatility History

Date	Value	Change
Sep 30, 2026	72.55%	+19.1%
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 72.60%
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 74.95% on September 3, 2026
What is CIEN 1-year volatility 1-year low?: CIEN 1-year volatility reached a 1-year low of 58.15% on October 7, 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