Ciena Corp (CIEN) stock
CIENNYSETelephone & Telegraph ApparatusFiscal year ends October 31
Financials through Q3 FY2026, quarter ended Aug 1, 2026Last filing: 10-Q on Sep 3, 2026Score 12/30116% above fair value
$320.72−28.73 (-8.22%)
Close on Oct 30, 2026Market cap $45.48BP/E 71.6Yield –
Price history
Ciena share prices for every month, newest first. Adjusted for stock splits, not for dividends.
Close, Oct 30, 2026
$320.72
-8.22% on the day
52-week range
$168.22 – $637.51
-49.7% from the high
Change over 52 weeks
+69.7%
From $188.96 on Oct 30, 2025
Average volume
2.58M
Shares a day, last 90 sessions
| Month | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 2026 | $355.19 | $454.73 | $313.27 | $320.72 | -8.84% | 69,054,013 |
| Sep 2026 | $376.89 | $381.60 | $311.60 | $351.82 | -8.09% | 60,092,012 |
| Aug 2026 | $365.00 | $462.69 | $355.00 | $382.80 | +1.52% | 39,836,114 |
| Jul 2026 | $466.20 | $485.69 | $323.29 | $377.05 | -23.14% | 44,174,765 |
| Jun 2026 | $559.52 | $637.51 | $417.34 | $490.56 | -15.45% | 87,761,394 |
| May 2026 | $527.25 | $605.61 | $499.01 | $580.23 | +9.98% | 39,504,525 |
| Apr 2026 | $401.71 | $529.89 | $399.82 | $527.58 | +35.89% | 53,367,215 |
| Mar 2026 | $353.76 | $446.89 | $278.39 | $388.23 | +11.34% | 76,543,274 |
| Feb 2026 | $247.93 | $365.90 | $238.57 | $348.70 | +38.48% | 85,984,064 |
| Jan 2026 | $241.00 | $269.90 | $216.07 | $251.81 | +7.67% | 49,293,922 |
| Dec 2025 | $194.49 | $248.00 | $186.39 | $233.87 | +14.52% | 63,180,811 |
| Nov 2025 | $193.34 | $214.17 | $168.22 | $204.21 | +7.52% | 68,218,822 |
| Oct 2025 | $144.24 | $193.74 | $143.19 | $189.92 | +30.38% | 54,350,725 |
| Sep 2025 | $92.68 | $146.53 | $90.00 | $145.67 | +55.02% | 71,986,699 |
| Aug 2025 | $90.16 | $98.88 | $84.41 | $93.97 | +1.22% | 35,753,933 |
| Jul 2025 | $80.50 | $95.51 | $76.89 | $92.84 | +14.15% | 43,263,483 |
| Jun 2025 | $80.15 | $86.21 | $70.77 | $81.33 | +1.59% | 61,176,524 |
| May 2025 | $69.50 | $83.49 | $69.06 | $80.06 | +19.21% | 30,302,240 |
| Apr 2025 | $60.51 | $67.56 | $49.21 | $67.16 | +11.14% | 44,611,748 |
| Mar 2025 | $79.50 | $80.55 | $58.04 | $60.43 | -24.05% | 61,479,210 |
| Feb 2025 | $83.41 | $94.79 | $75.61 | $79.57 | -8.69% | 40,864,286 |
| Jan 2025 | $85.07 | $101.44 | $74.89 | $87.14 | +2.75% | 54,793,162 |
| Dec 2024 | $69.77 | $91.82 | $69.20 | $84.81 | +21.64% | 55,389,573 |
| Nov 2024 | $64.14 | $73.47 | $63.00 | $69.72 | +9.78% | 28,868,668 |
| Oct 2024 | $61.49 | $69.91 | $59.60 | $63.51 | +3.12% | 47,468,880 |
| Sep 2024 | $57.84 | $63.06 | $50.67 | $61.59 | +6.83% | 46,208,198 |
| Aug 2024 | $52.75 | $58.19 | $44.89 | $57.65 | +9.31% | 30,400,325 |
| Jul 2024 | $48.29 | $53.62 | $46.25 | $52.74 | +9.46% | 24,799,825 |
| Jun 2024 | $48.83 | $53.58 | $44.69 | $48.18 | +0.02% | 40,909,689 |
| May 2024 | $46.23 | $50.25 | $46.04 | $48.17 | +4.20% | 27,322,080 |
| Apr 2024 | $49.61 | $49.80 | $43.30 | $46.23 | -6.51% | 34,844,457 |
| Mar 2024 | $57.14 | $63.24 | $49.04 | $49.45 | -13.22% | 59,454,671 |
| Feb 2024 | $53.94 | $57.73 | $53.17 | $56.98 | +7.51% | 36,528,199 |
| Jan 2024 | $44.53 | $53.84 | $44.22 | $53.00 | +17.75% | 34,765,741 |
| Dec 2023 | $45.71 | $48.36 | $42.20 | $45.01 | -1.83% | 44,954,289 |
| Nov 2023 | $42.07 | $46.66 | $41.83 | $45.85 | +8.65% | 21,708,069 |
| Oct 2023 | $47.30 | $48.06 | $39.94 | $42.20 | -10.71% | 29,501,624 |
| Sep 2023 | $50.56 | $50.72 | $45.75 | $47.26 | -5.44% | 27,289,540 |
| Aug 2023 | $42.89 | $50.25 | $40.11 | $49.98 | +18.44% | 38,922,260 |
| Jul 2023 | $42.57 | $44.70 | $40.58 | $42.20 | -0.68% | 39,420,953 |
| Jun 2023 | $46.91 | $48.33 | $40.84 | $42.49 | -9.09% | 57,129,745 |
| May 2023 | $46.30 | $49.56 | $42.64 | $46.74 | +1.52% | 34,035,336 |
| Apr 2023 | $52.34 | $52.67 | $44.39 | $46.04 | -12.34% | 28,195,289 |
| Mar 2023 | $48.17 | $54.25 | $47.54 | $52.52 | +8.92% | 49,923,703 |
| Feb 2023 | $51.69 | $52.60 | $45.83 | $48.22 | -7.30% | 28,487,548 |
| Jan 2023 | $51.50 | $53.16 | $48.56 | $52.02 | +2.04% | 24,864,950 |
| Dec 2022 | $45.10 | $52.51 | $42.81 | $50.98 | +13.39% | 50,174,657 |
| Nov 2022 | $48.20 | $48.53 | $41.05 | $44.96 | -6.14% | 36,889,374 |
| Oct 2022 | $41.15 | $48.30 | $38.33 | $47.90 | +18.48% | 31,698,442 |
| Sep 2022 | $47.50 | $48.32 | $39.44 | $40.43 | -20.32% | 49,682,423 |
| Aug 2022 | $51.15 | $56.38 | $49.66 | $50.74 | -1.67% | 27,201,098 |
| Jul 2022 | $45.34 | $51.78 | $43.79 | $51.60 | +12.91% | 21,557,201 |
| Jun 2022 | $51.25 | $51.70 | $41.63 | $45.70 | -10.07% | 42,032,319 |
| May 2022 | $55.29 | $57.46 | $48.16 | $50.82 | -7.88% | 30,587,457 |
| Apr 2022 | $61.00 | $61.78 | $54.06 | $55.17 | -9.01% | 21,170,207 |
| Mar 2022 | $68.11 | $71.06 | $53.29 | $60.63 | -11.39% | 42,887,907 |
| Feb 2022 | $66.13 | $69.80 | $63.34 | $68.42 | +3.18% | 32,719,117 |
| Jan 2022 | $76.77 | $77.38 | $62.24 | $66.31 | -13.85% | 35,931,710 |
| Dec 2021 | $61.16 | $78.28 | $59.92 | $76.97 | +27.79% | 41,121,027 |
| Nov 2021 | $54.29 | $62.56 | $54.29 | $60.23 | +10.94% | 22,580,252 |
| Oct 2021 | $51.64 | $54.94 | $51.01 | $54.29 | +5.73% | 15,675,067 |
| Sep 2021 | $57.14 | $58.58 | $50.34 | $51.35 | -10.12% | 29,736,732 |
| Aug 2021 | $58.48 | $58.85 | $54.26 | $57.13 | -1.74% | 22,175,299 |
| Jul 2021 | $57.13 | $58.44 | $53.66 | $58.14 | +2.20% | 19,830,901 |
| Jun 2021 | $53.11 | $61.09 | $52.50 | $56.89 | +7.60% | 37,181,827 |
| May 2021 | $50.64 | $54.34 | $49.51 | $52.87 | +4.76% | 26,014,254 |
| Apr 2021 | $54.98 | $57.65 | $50.28 | $50.47 | -7.77% | 25,013,730 |
| Mar 2021 | $52.68 | $57.57 | $47.52 | $54.72 | +4.89% | 35,213,393 |
| Feb 2021 | $53.79 | $56.59 | $51.20 | $52.17 | -2.29% | 22,645,699 |
| Jan 2021 | $52.94 | $56.99 | $50.84 | $53.39 | +1.02% | 29,824,920 |
| Dec 2020 | $45.08 | $54.05 | $43.63 | $52.85 | +17.97% | 47,636,664 |
| Nov 2020 | $39.84 | $44.90 | $38.47 | $44.80 | +13.73% | 33,012,365 |
| Oct 2020 | $39.85 | $43.40 | $38.03 | $39.39 | -0.76% | 39,641,323 |
| Sep 2020 | $57.33 | $60.31 | $38.20 | $39.69 | -30.09% | 81,746,948 |
| Aug 2020 | $60.00 | $61.52 | $55.18 | $56.77 | -4.60% | 29,630,761 |
| Jul 2020 | $54.42 | $59.82 | $51.93 | $59.51 | +9.88% | 40,879,795 |
| Jun 2020 | $55.27 | $57.19 | $51.31 | $54.16 | -1.99% | 44,985,122 |
| May 2020 | $45.62 | $56.76 | $45.32 | $55.26 | +19.48% | 38,309,729 |
| Apr 2020 | $38.86 | $49.91 | $38.00 | $46.25 | +16.18% | 46,908,829 |
| Mar 2020 | $38.86 | $44.42 | $30.58 | $39.81 | +3.54% | 57,814,219 |
| Feb 2020 | $40.87 | $44.61 | $37.54 | $38.45 | -5.46% | 33,670,404 |
| Jan 2020 | $43.25 | $43.86 | $40.57 | $40.67 | -4.73% | 35,478,013 |
| Dec 2019 | $37.79 | $43.97 | $33.22 | $42.69 | +12.46% | 100,617,177 |
| Nov 2019 | $36.59 | $38.41 | $35.86 | $37.96 | +2.26% | 38,508,017 |
| Oct 2019 | $38.05 | $38.94 | $35.83 | $37.12 | -5.38% | 49,590,252 |
| Sep 2019 | $40.78 | $41.88 | $37.94 | $39.23 | -4.15% | 79,939,344 |
| Aug 2019 | $45.24 | $45.84 | $39.19 | $40.93 | -9.49% | 39,485,486 |
| Jul 2019 | $42.03 | $46.78 | $41.19 | $45.22 | +9.94% | 49,115,543 |
| Jun 2019 | $35.04 | $46.23 | $34.51 | $41.13 | +17.72% | 89,602,010 |
| May 2019 | $38.57 | $39.07 | $32.76 | $34.94 | -8.92% | 56,048,593 |
| Apr 2019 | $37.62 | $40.76 | $36.64 | $38.36 | +2.73% | 44,432,715 |
| Mar 2019 | $43.00 | $45.70 | $36.64 | $37.34 | -12.47% | 65,447,567 |
| Feb 2019 | $38.15 | $43.96 | $37.02 | $42.66 | +12.00% | 39,785,136 |
| Jan 2019 | $33.24 | $40.16 | $32.85 | $38.09 | +12.33% | 57,600,511 |
| Dec 2018 | $33.59 | $36.55 | $30.67 | $33.91 | +3.95% | 75,018,866 |
| Nov 2018 | $31.50 | $35.04 | $30.33 | $32.62 | +4.35% | 72,170,145 |
| Oct 2018 | $31.39 | $31.88 | $28.23 | $31.26 | +0.06% | 70,171,295 |
| Sep 2018 | $31.52 | $32.18 | $30.26 | $31.24 | -1.08% | 45,692,191 |
| Aug 2018 | $25.42 | $32.33 | $25.19 | $31.58 | +24.33% | 62,992,509 |
| Jul 2018 | $26.42 | $27.54 | $25.22 | $25.40 | -4.19% | 37,562,556 |
| Jun 2018 | $23.20 | $26.68 | $23.03 | $26.51 | +15.01% | 69,089,506 |
| May 2018 | $25.35 | $27.01 | $22.99 | $23.05 | -10.49% | 77,441,321 |
| Apr 2018 | $25.80 | $27.10 | $24.64 | $25.75 | -0.58% | 60,361,973 |
| Mar 2018 | $23.29 | $27.73 | $22.97 | $25.90 | +11.78% | 91,809,592 |
| Feb 2018 | $21.35 | $24.00 | $20.71 | $23.17 | +8.88% | 62,928,449 |
| Jan 2018 | $21.06 | $22.99 | $20.98 | $21.28 | +1.67% | 51,081,959 |
| Dec 2017 | $21.53 | $22.03 | $19.99 | $20.93 | -3.77% | 76,639,621 |
| Nov 2017 | $21.51 | $22.00 | $19.40 | $21.75 | +2.26% | 58,739,942 |
| Oct 2017 | $21.99 | $22.63 | $20.29 | $21.27 | -3.19% | 58,831,267 |
| Sep 2017 | $21.80 | $22.43 | $20.86 | $21.97 | +1.67% | 72,711,771 |
| Aug 2017 | $25.96 | $26.32 | $21.35 | $21.61 | -16.08% | 84,801,425 |
| Jul 2017 | $25.26 | $26.92 | $24.65 | $25.75 | +2.92% | 40,067,983 |
| Jun 2017 | $26.29 | $27.98 | $24.83 | $25.02 | +6.56% | 102,781,143 |
| May 2017 | $22.96 | $24.65 | $22.35 | $23.48 | +2.49% | 60,098,814 |
| Apr 2017 | $23.60 | $23.81 | $21.43 | $22.91 | -2.96% | 53,058,867 |
| Mar 2017 | $26.78 | $26.84 | $22.73 | $23.61 | -10.36% | 90,474,815 |
| Feb 2017 | $24.57 | $26.63 | $23.66 | $26.34 | +8.22% | 42,914,993 |
| Jan 2017 | $24.47 | $25.32 | $23.53 | $24.34 | -0.29% | 44,966,405 |
| Dec 2016 | $21.36 | $25.19 | $20.25 | $24.41 | +13.80% | 77,790,987 |
| Nov 2016 | $19.46 | $22.82 | $18.94 | $21.45 | +10.68% | 46,717,094 |
| Oct 2016 | $21.71 | $23.09 | $19.30 | $19.38 | -11.10% | 56,260,188 |
| Sep 2016 | $22.32 | $23.60 | $20.82 | $21.80 | +1.63% | 66,856,900 |
| Aug 2016 | $19.20 | $22.21 | $18.72 | $21.45 | +11.78% | 54,255,600 |
| Jul 2016 | $18.75 | $20.79 | $17.59 | $19.19 | +2.35% | 57,536,600 |
| Jun 2016 | $17.36 | $21.87 | $17.32 | $18.75 | +7.39% | 92,166,700 |
| May 2016 | $16.82 | $17.55 | $15.62 | $17.46 | +3.74% | 55,131,000 |
| Apr 2016 | $18.76 | $19.07 | $16.50 | $16.83 | -11.51% | 62,232,200 |
| Mar 2016 | $20.77 | $21.14 | $16.32 | $19.02 | -7.22% | 108,487,100 |
| Feb 2016 | $17.70 | $21.12 | $17.15 | $20.50 | +15.36% | 55,700,700 |
| Jan 2016 | $20.19 | $20.37 | $16.63 | $17.77 | -14.11% | 56,419,900 |
| Dec 2015 | $25.09 | $25.31 | $18.98 | $20.69 | -17.37% | 95,065,000 |
| Nov 2015 | $24.16 | $25.46 | $23.33 | $25.04 | +3.73% | 37,336,600 |
| Oct 2015 | $20.75 | $24.63 | $20.57 | $24.14 | +16.51% | 56,582,700 |
| Sep 2015 | $21.79 | $23.84 | $20.03 | $20.72 | -7.33% | 75,035,200 |
| Aug 2015 | $25.39 | $25.49 | $17.97 | $22.36 | -12.14% | 64,116,900 |
| Jul 2015 | $24.03 | $26.50 | $23.10 | $25.45 | +7.47% | 57,014,200 |
| Jun 2015 | $24.24 | $26.20 | $23.37 | $23.68 | -1.82% | 72,495,800 |
| May 2015 | $21.34 | $24.55 | $20.67 | $24.12 | +13.24% | 54,832,400 |
| Apr 2015 | $19.10 | $22.50 | $18.75 | $21.30 | +10.31% | 59,785,200 |
| Mar 2015 | $20.92 | $21.47 | $18.95 | $19.31 | -7.70% | 81,626,200 |
| Feb 2015 | $18.57 | $21.17 | $17.86 | $20.92 | +12.96% | 38,792,800 |
| Jan 2015 | $19.53 | $20.32 | $18.49 | $18.52 | -4.59% | 54,105,200 |
| Dec 2014 | $16.51 | $20.14 | $15.88 | $19.41 | +17.42% | 80,142,700 |
| Nov 2014 | $16.79 | $17.04 | $14.69 | $16.53 | -1.37% | 48,891,000 |
| Oct 2014 | $16.74 | $16.97 | $13.77 | $16.76 | +0.24% | 90,479,900 |
| Sep 2014 | $20.82 | $20.82 | $16.66 | $16.72 | -19.19% | 87,828,200 |
| Aug 2014 | $19.49 | $20.98 | $18.64 | $20.69 | +5.94% | 51,974,200 |
| Jul 2014 | $21.80 | $22.46 | $19.39 | $19.53 | -9.83% | 61,060,700 |
| Jun 2014 | $19.21 | $22.94 | $18.54 | $21.66 | +11.65% | 82,431,100 |
| May 2014 | $19.72 | $20.64 | $18.00 | $19.40 | -1.87% | 62,453,300 |
| Apr 2014 | $22.87 | $24.21 | $18.88 | $19.77 | -13.06% | 105,818,100 |
| Mar 2014 | $24.34 | $27.16 | $21.90 | $22.74 | -7.45% | 98,024,700 |
| Feb 2014 | $23.31 | $26.49 | $21.50 | $24.57 | +5.32% | 64,793,500 |
| Jan 2014 | $23.93 | $24.37 | $21.41 | $23.33 | -2.51% | 62,265,900 |
| Dec 2013 | $22.26 | $24.15 | $20.93 | $23.93 | +7.74% | 92,883,000 |
| Nov 2013 | $23.26 | $23.73 | $21.25 | $22.21 | -4.56% | 55,177,200 |
| Oct 2013 | $25.05 | $27.94 | $23.00 | $23.27 | -6.96% | 83,338,500 |
| Sep 2013 | $20.31 | $26.17 | $20.28 | $25.01 | +25.55% | 93,837,000 |
| Aug 2013 | $22.35 | $23.63 | $19.78 | $19.92 | -9.70% | 56,717,800 |
| Jul 2013 | $19.53 | $23.48 | $19.37 | $22.06 | +13.54% | 69,033,600 |
| Jun 2013 | $16.80 | $20.60 | $16.08 | $19.43 | +16.07% | 100,861,900 |
| May 2013 | $14.92 | $17.11 | $14.22 | $16.74 | +11.90% | 73,734,300 |
| Apr 2013 | $16.05 | $16.81 | $14.14 | $14.96 | -6.56% | 74,209,600 |
| Mar 2013 | $15.12 | $17.78 | $14.69 | $16.01 | +5.05% | 80,425,400 |
| Feb 2013 | $15.75 | $16.59 | $14.93 | $15.24 | -2.68% | 47,506,400 |
| Jan 2013 | $16.04 | $16.72 | $14.37 | $15.66 | -0.25% | 86,832,500 |
| Dec 2012 | $15.03 | $16.43 | $14.83 | $15.70 | +5.51% | 75,838,300 |
| Nov 2012 | $12.41 | $15.15 | $12.41 | $14.88 | +19.81% | 72,415,600 |
| Oct 2012 | $13.76 | $13.77 | $11.96 | $12.42 | -8.61% | 69,215,400 |
| Sep 2012 | $13.65 | $14.95 | $12.85 | $13.59 | -0.59% | 76,486,400 |
| Aug 2012 | $16.25 | $18.39 | $13.39 | $13.67 | -14.72% | 149,287,400 |
| Jul 2012 | $16.29 | $16.95 | $13.08 | $16.03 | -2.08% | 128,414,500 |
| Jun 2012 | $13.29 | $16.45 | $12.25 | $16.37 | +20.81% | 129,455,700 |
| May 2012 | $14.83 | $15.09 | $11.45 | $13.55 | -8.57% | 143,028,400 |
| Apr 2012 | $16.11 | $16.98 | $14.66 | $14.82 | -8.46% | 88,848,600 |
| Mar 2012 | $14.80 | $16.84 | $13.40 | $16.19 | +8.73% | 116,744,800 |
| Feb 2012 | $14.69 | $17.39 | $14.60 | $14.89 | +2.34% | 98,354,700 |
| Jan 2012 | $12.43 | $15.84 | $11.91 | $14.55 | +20.25% | 105,599,100 |
| Dec 2011 | $12.03 | $13.12 | $10.30 | $12.10 | -0.08% | 100,873,000 |
| Nov 2011 | $12.61 | $14.20 | $10.90 | $12.11 | -8.12% | 104,790,000 |
| Oct 2011 | $11.07 | $13.88 | $9.89 | $13.18 | +17.68% | 133,053,600 |
| Sep 2011 | $13.86 | $14.89 | $10.80 | $11.20 | -8.50% | 185,477,500 |
| Aug 2011 | $15.81 | $15.92 | $10.33 | $12.24 | -20.83% | 158,328,900 |
| Jul 2011 | $18.46 | $18.78 | $15.00 | $15.46 | -15.89% | 113,511,800 |
| Jun 2011 | $26.57 | $27.27 | $16.50 | $18.38 | -31.29% | 180,720,900 |
| May 2011 | $28.36 | $28.44 | $24.95 | $26.75 | -5.28% | 83,817,500 |
| Apr 2011 | $25.56 | $28.78 | $24.58 | $28.24 | +8.87% | 96,206,400 |
| Mar 2011 | $27.65 | $29.24 | $22.20 | $25.94 | -5.91% | 191,773,400 |
| Feb 2011 | $22.22 | $28.68 | $22.17 | $27.57 | +25.15% | 118,603,700 |
| Jan 2011 | $21.21 | $25.77 | $21.14 | $22.03 | +4.66% | 145,227,700 |
| Dec 2010 | $15.43 | $21.69 | $15.11 | $21.05 | +39.13% | 120,849,500 |
| Nov 2010 | $13.80 | $15.55 | $13.34 | $15.13 | +9.56% | 102,299,500 |
| Oct 2010 | $15.72 | $16.00 | $12.96 | $13.81 | -11.30% | 150,188,900 |
| Sep 2010 | $12.68 | $16.04 | $12.52 | $15.57 | +24.66% | 106,218,800 |
| Aug 2010 | $13.36 | $13.78 | $11.86 | $12.49 | -4.58% | 76,825,000 |
| Jul 2010 | $12.67 | $14.13 | $12.12 | $13.09 | +3.23% | 97,680,400 |
| Jun 2010 | $15.29 | $15.62 | $12.60 | $12.68 | -18.56% | 143,177,300 |
| May 2010 | $18.63 | $19.48 | $14.45 | $15.57 | -15.97% | 140,878,300 |
| Apr 2010 | $15.37 | $19.43 | $14.96 | $18.53 | +21.43% | 203,238,400 |
| Mar 2010 | $14.36 | $16.29 | $13.04 | $15.26 | +6.42% | 209,707,900 |
| Feb 2010 | $12.83 | $14.86 | $12.33 | $14.34 | +12.47% | 95,077,300 |
| Jan 2010 | $10.92 | $13.63 | $10.80 | $12.75 | +17.62% | 150,587,200 |
| Dec 2009 | $12.28 | $13.30 | $10.53 | $10.84 | -10.78% | 190,029,600 |
| Nov 2009 | $11.68 | $14.05 | $11.43 | $12.15 | +3.58% | 104,210,500 |
| Oct 2009 | $16.11 | $16.17 | $11.64 | $11.73 | -27.95% | 177,281,300 |
| Sep 2009 | $13.22 | $16.64 | $12.10 | $16.28 | +21.49% | 103,830,500 |
| Aug 2009 | $11.22 | $13.89 | $11.08 | $13.40 | +20.07% | 91,406,600 |
| Jul 2009 | $10.37 | $11.91 | $8.45 | $11.16 | +7.83% | 91,620,500 |
| Jun 2009 | $11.33 | $12.18 | $9.54 | $10.35 | -5.91% | 105,265,400 |
| May 2009 | $11.95 | $12.51 | $9.26 | $11.00 | -7.95% | 82,365,100 |
| Apr 2009 | $7.70 | $12.28 | $7.56 | $11.95 | +53.60% | 77,484,400 |
| Mar 2009 | $5.33 | $8.46 | $5.05 | $7.78 | +44.88% | 76,505,600 |
| Feb 2009 | $6.19 | $6.90 | $4.98 | $5.37 | -13.94% | 67,483,800 |
| Jan 2009 | $6.69 | $9.10 | $6.20 | $6.24 | -6.87% | 96,501,800 |
| Dec 2008 | $7.20 | $7.78 | $5.75 | $6.70 | -9.46% | 80,675,100 |
| Nov 2008 | $9.11 | $9.79 | $5.07 | $7.40 | -23.00% | 56,191,100 |
| Oct 2008 | $9.95 | $10.18 | $6.60 | $9.61 | -4.66% | 102,866,200 |
| Sep 2008 | $17.42 | $17.80 | $9.29 | $10.08 | -42.00% | 168,985,700 |
| Aug 2008 | $20.81 | $20.84 | $16.34 | $17.38 | -15.92% | 91,608,600 |
| Jul 2008 | $22.80 | $23.91 | $19.30 | $20.67 | -10.79% | 101,089,600 |
| Jun 2008 | $30.64 | $30.84 | $22.78 | $23.17 | -24.18% | 101,070,900 |
| May 2008 | $33.67 | $35.14 | $29.13 | $30.56 | -9.61% | 64,068,500 |
| Apr 2008 | $31.53 | $35.82 | $30.14 | $33.81 | +9.67% | 56,660,200 |
| Mar 2008 | $25.90 | $32.25 | $24.78 | $30.83 | +19.36% | 89,871,900 |
| Feb 2008 | $26.64 | $28.37 | $24.00 | $25.83 | -4.79% | 74,757,800 |
| Jan 2008 | $33.78 | $34.20 | $21.40 | $27.13 | -20.46% | 95,077,200 |
| Dec 2007 | $44.05 | $44.31 | $33.46 | $34.11 | -22.44% | 67,308,800 |
| Nov 2007 | $47.75 | $48.82 | $39.26 | $43.98 | -8.11% | 59,532,900 |
| Oct 2007 | $38.32 | $49.55 | $38.24 | $47.86 | +25.68% | 78,863,000 |
| Sep 2007 | $37.90 | $39.20 | $36.59 | $38.08 | +0.53% | 43,694,600 |
| Aug 2007 | $36.22 | $39.34 | $32.75 | $37.88 | +3.70% | 83,007,700 |
| Jul 2007 | $36.59 | $41.13 | $36.18 | $36.53 | +1.11% | 56,828,000 |
| Jun 2007 | $34.18 | $37.20 | $32.88 | $36.13 | +5.27% | 103,641,100 |
| May 2007 | $29.36 | $34.47 | $28.22 | $34.32 | +17.70% | 72,507,400 |
| Apr 2007 | $28.15 | $30.95 | $27.66 | $29.16 | +4.33% | 53,960,800 |
| Mar 2007 | $28.16 | $29.30 | $24.75 | $27.95 | -11.19% | 86,521,600 |
| Feb 2007 | $28.10 | $32.80 | $26.08 | $31.47 | +12.03% | 68,198,900 |
| Jan 2007 | $28.02 | $30.56 | $27.08 | $28.09 | +1.37% | 54,601,300 |
| Dec 2006 | $25.17 | $29.73 | $24.39 | $27.71 | +10.22% | 60,550,700 |
| Nov 2006 | $23.53 | $26.38 | $22.04 | $25.14 | +6.93% | 43,979,500 |
| Oct 2006 | $27.28 | $29.33 | $23.08 | $23.51 | -13.72% | 63,459,200 |
| Sep 2006 | $27.79 | $30.87 | $25.69 | $27.25 | -1.45% | 50,498,301 |
| Aug 2006 | $25.27 | $30.24 | $23.94 | $27.65 | +8.82% | 49,527,642 |
| Jul 2006 | $32.48 | $33.18 | $23.38 | $25.41 | -24.53% | 51,971,959 |
| Jun 2006 | $31.50 | $33.67 | $26.46 | $33.67 | +11.86% | 73,697,600 |
| May 2006 | $28.84 | $30.59 | $25.69 | $30.10 | +5.13% | 64,165,342 |
| Apr 2006 | $37.24 | $37.66 | $28.21 | $28.63 | -21.50% | 89,837,299 |
| Mar 2006 | $28.70 | $39.34 | $28.35 | $36.47 | +29.60% | 80,867,473 |
| Feb 2006 | $28.00 | $31.43 | $26.04 | $28.14 | +0.50% | 33,662,971 |
| Jan 2006 | $20.79 | $28.77 | $20.37 | $28.00 | +34.68% | 42,226,755 |
| Dec 2005 | $21.00 | $22.61 | $18.69 | $20.79 | -0.67% | 33,635,584 |
| Nov 2005 | $16.52 | $20.93 | $16.31 | $20.93 | +26.16% | 26,223,385 |
| Oct 2005 | $18.90 | $20.30 | $15.19 | $16.59 | -10.23% | 33,703,843 |
| Sep 2005 | $16.24 | $19.25 | $14.63 | $18.48 | +17.33% | 35,272,656 |
| Aug 2005 | $15.75 | $16.24 | $14.28 | $15.75 | +0.45% | 18,991,330 |
| Jul 2005 | $14.56 | $17.15 | $14.56 | $15.68 | +7.18% | 22,054,241 |
| Jun 2005 | $15.75 | $18.55 | $14.49 | $14.63 | -5.86% | 32,677,584 |
| May 2005 | $16.10 | $17.08 | $14.35 | $15.54 | -3.48% | 23,259,913 |
| Apr 2005 | $12.32 | $16.17 | $11.55 | $16.10 | +33.72% | 31,264,587 |
| Mar 2005 | $13.93 | $14.70 | $11.48 | $12.04 | -13.13% | 31,232,356 |
| Feb 2005 | $17.78 | $20.65 | $13.58 | $13.86 | -22.35% | 38,454,071 |
| Jan 2005 | $23.66 | $24.01 | $17.50 | $17.85 | -23.65% | 36,802,887 |
| Dec 2004 | $18.13 | $24.50 | $15.75 | $23.38 | +30.98% | 61,683,842 |
| Nov 2004 | $17.22 | $18.62 | $15.40 | $17.85 | +3.24% | 28,345,100 |
| Oct 2004 | $13.93 | $17.85 | $13.58 | $17.29 | +24.75% | 26,870,358 |
| Sep 2004 | $12.88 | $14.70 | $12.32 | $13.86 | +8.79% | 24,532,458 |
| Aug 2004 | $19.46 | $20.51 | $11.69 | $12.74 | -35.46% | 50,148,099 |
| Jul 2004 | $25.97 | $26.04 | $18.62 | $19.74 | -23.78% | 34,760,341 |
| Jun 2004 | $24.78 | $26.95 | $21.14 | $25.90 | +3.06% | 47,187,212 |
| May 2004 | $29.26 | $29.40 | $21.84 | $25.13 | -13.08% | 35,525,427 |
| Apr 2004 | $35.14 | $38.43 | $28.42 | $28.91 | -16.90% | 27,696,671 |
| Mar 2004 | $40.60 | $41.93 | $32.90 | $34.79 | -13.26% | 36,881,429 |
| Feb 2004 | $51.59 | $52.08 | $39.27 | $40.11 | -20.97% | 42,837,430 |
| Jan 2004 | $47.25 | $56.98 | $45.64 | $50.75 | +10.52% | 41,309,458 |
| Dec 2003 | $49.84 | $51.10 | $39.41 | $45.92 | -7.34% | 40,836,915 |
| Nov 2003 | $45.43 | $49.84 | $43.05 | $49.56 | +10.45% | 29,923,071 |
| Oct 2003 | $41.37 | $46.48 | $40.60 | $44.87 | +9.39% | 33,136,927 |
| Sep 2003 | $45.92 | $52.15 | $40.32 | $41.02 | -9.85% | 42,791,612 |
| Aug 2003 | $40.25 | $45.50 | $35.70 | $45.50 | +12.85% | 30,319,698 |
| Jul 2003 | $35.98 | $47.18 | $34.79 | $40.32 | +11.41% | 43,773,241 |
| Jun 2003 | $41.58 | $42.84 | $34.23 | $36.19 | -10.09% | 40,185,656 |
| May 2003 | $35.35 | $41.30 | $33.53 | $40.25 | +17.83% | 38,056,587 |
| Apr 2003 | $30.80 | $35.35 | $29.33 | $34.16 | +11.67% | 22,175,815 |
| Mar 2003 | $38.43 | $39.06 | $29.47 | $30.59 | -19.37% | 26,862,884 |
| Feb 2003 | $41.16 | $42.84 | $31.36 | $37.94 | -6.55% | 27,323,101 |
| Jan 2003 | $37.10 | $54.18 | $36.19 | $40.60 | +12.84% | 41,421,515 |
| Dec 2002 | $49.14 | $49.91 | $34.86 | $35.98 | -22.71% | 38,251,856 |
| Nov 2002 | $25.69 | $47.53 | $24.43 | $46.55 | +80.71% | 37,060,672 |
| Oct 2002 | $21.70 | $27.86 | $16.87 | $25.76 | +23.91% | 21,149,185 |
| Sep 2002 | $28.28 | $30.31 | $20.37 | $20.79 | -26.67% | 17,988,843 |
| Aug 2002 | $28.28 | $34.30 | $23.66 | $28.35 | +0.50% | 21,650,885 |
| Jul 2002 | $29.75 | $44.94 | $26.95 | $28.21 | -3.82% | 26,915,242 |
| Jun 2002 | $39.83 | $39.90 | $25.20 | $29.33 | -25.97% | 27,827,958 |
| May 2002 | $52.29 | $52.71 | $39.48 | $39.62 | -24.43% | 27,293,727 |
| Apr 2002 | $64.75 | $67.34 | $49.21 | $52.43 | -16.78% | 31,971,314 |
| Mar 2002 | $54.95 | $76.65 | $54.81 | $63.00 | +15.98% | 38,322,871 |
| Feb 2002 | $86.03 | $90.65 | $49.91 | $54.32 | -38.90% | 50,235,300 |
| Jan 2002 | $102.06 | $121.10 | $88.20 | $88.90 | -11.25% | 41,608,059 |
| Dec 2001 | $120.40 | $148.33 | $96.60 | $100.17 | -19.38% | 54,229,758 |
| Nov 2001 | $117.18 | $151.97 | $104.30 | $124.25 | +9.16% | 82,239,413 |
| Oct 2001 | $70.14 | $154.00 | $64.40 | $113.82 | +58.02% | 70,831,686 |
| Sep 2001 | $117.74 | $118.93 | $65.87 | $72.03 | -39.89% | 32,167,713 |
| Aug 2001 | $239.75 | $259.21 | $118.30 | $119.84 | -48.34% | 67,888,914 |
| Jul 2001 | $258.65 | $273.00 | $198.03 | $231.98 | -12.79% | 47,671,386 |
| Jun 2001 | $387.17 | $433.65 | $243.67 | $266.00 | -29.82% | 61,726,016 |
| May 2001 | $384.02 | $467.11 | $360.50 | $379.05 | -1.65% | 69,444,729 |
| Apr 2001 | $288.75 | $496.23 | $239.64 | $385.42 | +31.88% | 97,552,987 |
| Mar 2001 | $458.50 | $547.75 | $255.50 | $292.25 | -37.86% | 89,809,687 |
| Feb 2001 | $638.75 | $658.00 | $453.25 | $470.31 | -25.40% | 55,555,542 |
| Jan 2001 | $539.00 | $756.00 | $434.00 | $630.44 | +10.85% | 42,648,601 |
| Dec 2000 | $550.38 | $849.63 | $416.94 | $568.75 | +7.00% | 52,163,500 |
| Nov 2000 | $713.56 | $812.44 | $466.81 | $531.56 | -27.76% | 44,047,828 |
| Oct 2000 | $878.94 | $1,057.00 | $588.00 | $735.88 | -14.40% | 50,847,243 |
| Sep 2000 | $782.03 | $953.75 | $611.63 | $859.69 | +10.80% | 46,747,358 |
| Aug 2000 | $495.25 | $776.34 | $449.31 | $775.91 | +55.98% | 35,607,517 |
| Jul 2000 | $580.13 | $630.88 | $454.13 | $497.44 | -14.74% | 26,099,313 |
| Jun 2000 | $435.75 | $594.13 | $428.97 | $583.41 | +39.27% | 31,519,371 |
| May 2000 | $443.63 | $537.25 | $314.56 | $418.91 | -3.19% | 45,852,373 |
| Apr 2000 | $425.69 | $466.81 | $277.38 | $432.69 | -1.98% | 39,265,545 |
| Mar 2000 | $559.56 | $661.50 | $402.94 | $441.44 | -21.08% | 37,089,742 |
| Feb 2000 | $238.88 | $566.13 | $229.91 | $559.34 | +143.52% | 31,583,057 |
| Jan 2000 | $204.31 | $277.81 | $158.81 | $229.69 | +14.13% | 29,369,912 |
| Dec 1999 | $153.78 | $260.97 | $150.72 | $201.25 | +30.87% | 34,825,202 |
| Nov 1999 | $124.14 | $190.75 | $117.25 | $153.78 | +24.65% | 35,610,599 |
| Oct 1999 | $127.53 | $135.35 | $102.81 | $123.38 | -3.42% | 27,465,742 |
| Sep 1999 | $124.25 | $149.84 | $116.38 | $127.75 | +3.91% | 26,766,657 |
| Aug 1999 | $117.69 | $132.56 | $101.72 | $122.94 | +4.07% | 26,108,629 |
| Jul 1999 | $106.31 | $132.13 | $103.03 | $118.13 | +11.80% | 20,260,659 |
| Jun 1999 | $101.50 | $119.44 | $93.84 | $105.66 | +5.00% | 20,650,715 |
| May 1999 | $82.25 | $105.44 | $79.41 | $100.63 | +22.34% | 21,883,028 |
| Apr 1999 | $79.41 | $84.44 | $58.19 | $82.25 | +4.44% | 21,195,145 |
| Mar 1999 | $97.56 | $98.88 | $77.44 | $78.75 | -19.28% | 26,098,431 |
| Feb 1999 | $72.19 | $102.38 | $68.69 | $97.56 | +38.08% | 41,789,430 |
| Jan 1999 | $53.16 | $80.50 | $47.69 | $70.66 | +38.03% | 42,150,199 |
| Dec 1998 | $57.53 | $68.25 | $43.53 | $51.19 | -13.97% | 27,827,658 |
| Nov 1998 | $66.39 | $77.44 | $53.81 | $59.50 | -1.09% | 53,292,715 |
| Oct 1998 | $47.91 | $61.47 | $28.44 | $60.16 | +20.09% | 53,426,628 |
| Sep 1998 | $102.81 | $119.00 | $37.63 | $50.09 | -49.11% | 65,310,516 |
| Aug 1998 | $259.88 | $265.56 | $91.88 | $98.44 | -62.03% | 40,627,600 |
| Jul 1998 | $243.25 | $323.31 | $241.06 | $259.22 | +6.37% | 13,395,773 |
| Jun 1998 | $181.13 | $255.50 | $175.00 | $243.69 | +33.89% | 21,300,573 |
| May 1998 | $196.44 | $203.44 | $164.06 | $182.00 | -6.73% | 12,310,257 |
| Apr 1998 | $150.94 | $201.25 | $130.81 | $195.13 | +30.79% | 19,941,857 |
| Mar 1998 | $147.00 | $174.34 | $140.00 | $149.19 | +1.64% | 14,910,030 |
| Feb 1998 | $196.00 | $203.88 | $130.38 | $146.78 | -23.84% | 22,537,572 |
| Jan 1998 | $216.56 | $222.47 | $166.03 | $192.72 | -9.92% | 13,158,916 |
| Dec 1997 | $192.94 | $216.34 | $183.75 | $213.94 | +13.19% | 10,335,230 |
| Nov 1997 | $196.00 | $217.00 | $178.06 | $189.00 | -1.82% | 7,369,457 |
| Oct 1997 | $178.06 | $222.69 | $166.25 | $192.50 | +11.04% | 17,728,887 |
| Sep 1997 | $168.44 | $178.94 | $150.50 | $173.36 | +3.73% | 10,641,255 |
| Aug 1997 | $196.00 | $206.50 | $152.69 | $167.13 | -14.92% | 15,835,370 |
| Jul 1997 | $161.44 | $200.38 | $155.75 | $196.44 | +19.10% | 8,299,087 |
| Jun 1997 | $163.63 | $189.00 | $147.00 | $164.94 | +0.80% | 5,797,057 |
| May 1997 | $109.48 | $164.50 | $99.75 | $163.63 | +49.60% | 7,709,884 |
| Apr 1997 | $98.00 | $134.75 | $77.88 | $109.38 | +9.89% | 3,550,599 |
| Mar 1997 | $136.50 | $147.00 | $94.94 | $99.53 | -27.55% | 2,148,885 |
| Feb 1997 | $115.50 | $154.00 | $110.25 | $137.38 | – | 4,687,513 |
Seasonality
CIEN return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average | 2.6% | 5.5% | -3.1% | 2.7% | 3.4% | 1.2% | 3.3% | 2.1% | -1.6% | 2.9% | 5.9% | 11.8% |
| Months up | 7 of 10 | 6 of 10 | 5 of 10 | 4 of 10 | 7 of 10 | 6 of 10 | 7 of 10 | 5 of 10 | 3 of 10 | 5 of 10 | 8 of 9 | 7 of 9 |
| 2026 | 7.7% | 38.5% | 11.3% | 35.9% | 10.0% | -15.5% | -23.1% | 1.5% | -8.1% | -8.8% | ||
| 2025 | 2.7% | -8.7% | -24.1% | 11.1% | 19.2% | 1.6% | 14.2% | 1.2% | 55.0% | 30.4% | 7.5% | 14.5% |
| 2024 | 17.8% | 7.5% | -13.2% | -6.5% | 4.2% | 0.0% | 9.5% | 9.3% | 6.8% | 3.1% | 9.8% | 21.6% |
| 2023 | 2.0% | -7.3% | 8.9% | -12.3% | 1.5% | -9.1% | -0.7% | 18.4% | -5.4% | -10.7% | 8.6% | -1.8% |
| 2022 | -13.8% | 3.2% | -11.4% | -9.0% | -7.9% | -10.1% | 12.9% | -1.7% | -20.3% | 18.5% | -6.1% | 13.4% |
| 2021 | 1.0% | -2.3% | 4.9% | -7.8% | 4.8% | 7.6% | 2.2% | -1.7% | -10.1% | 5.7% | 10.9% | 27.8% |
| 2020 | -4.7% | -5.5% | 3.5% | 16.2% | 19.5% | -2.0% | 9.9% | -4.6% | -30.1% | -0.8% | 13.7% | 18.0% |
| 2019 | 12.3% | 12.0% | -12.5% | 2.7% | -8.9% | 17.7% | 9.9% | -9.5% | -4.2% | -5.4% | 2.3% | 12.5% |
| 2018 | 1.7% | 8.9% | 11.8% | -0.6% | -10.5% | 15.0% | -4.2% | 24.3% | -1.1% | 0.1% | 4.4% | 4.0% |
| 2017 | -0.3% | 8.2% | -10.4% | -3.0% | 2.5% | 6.6% | 2.9% | -16.1% | 1.7% | -3.2% | 2.3% | -3.8% |