CIEN
CIENA
PE ratio, current and historical analysis
- Stocks
- Technology
- NYSE: CIEN
- PE Ratio
As of Sep 11, 2026, the CIENA stock's PE ratio is 75.66. This takes into account the latest EPS of $4.62 and stock price of $349.54. The PE ratio marks a decrease of 52% from its last 4 quarters average of 157.4.
CIEN PE ratio history
The PE ratio of CIENA has averaged 48.81 over the last ten years. The current P/E ratio of 75.66 is 55% higher than the historical average. Looking back at the last ten years, CIEN's PE ratio peaked in the Nov 2025 quarter at 218.3, when the price was $189.92 and the EPS was $0.87. The lowest point was in the Oct 2017 quarter, when it reached 2.39 with a price of $21.27 and an EPS of $8.89.
CIENA PE ratio by year
Maximum annual increase: 359.73% in 2024
Maximum annual decrease: -93.59% in 2017
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| 2025 | 218.3 | 97.93% | $189.92 | $0.87 |
| 2024 | 110.29 | 359.73% | $63.97 | $0.58 |
| 2023 | 23.99 | -49.78% | $41.02 | $1.71 |
| 2022 | 47.77 | 183.33% | $48.25 | $1.01 |
| 2021 | 16.86 | 0.18% | $54.29 | $3.22 |
| 2020 | 16.83 | -26.09% | $39.39 | $2.34 |
| 2019 | 22.77 | N/A | $37.12 | $1.63 |
| 2018 | N/A | N/A | $31.26 | -$2.4 |
| 2017 | 2.39 | -93.59% | $21.27 | $8.89 |
| 2016 | 37.27 | -84.56% | $19.38 | $0.52 |
| 2015 | 241.4 | N/A | $24.14 | $0.1 |
| 2014 | N/A | N/A | $16.76 | -$0.38 |
| 2013 | N/A | N/A | $23.27 | -$0.83 |
| 2012 | N/A | N/A | $12.42 | -$1.45 |
| 2011 | N/A | N/A | $13.18 | -$2.04 |
CIENA PE ratio by quarter (TTM)
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| Aug 2026 | 81.61 | -52.89% | $377.05 | $4.62 |
| May 2026 | 173.23 | 10.76% | $535.29 | $3.09 |
| Jan 2026 | 156.4 | -28.36% | $251.81 | $1.61 |
| Nov 2025 | 218.3 | 141.38% | $189.92 | $0.87 |
| Aug 2025 | 90.44 | -9.37% | $88.63 | $0.98 |
| May 2025 | 99.79 | -37.02% | $72.85 | $0.73 |
| Feb 2025 | 158.44 | 43.66% | $87.14 | $0.55 |
| Nov 2024 | 110.29 | 106.69% | $63.97 | $0.58 |
| Jul 2024 | 53.36 | 19.05% | $50.16 | $0.94 |
| Apr 2024 | 44.82 | 35.12% | $46.61 | $1.04 |
| Jan 2024 | 33.17 | 38.27% | $51.42 | $1.55 |
| Oct 2023 | 23.99 | -14.6% | $41.02 | $1.71 |
| Jul 2023 | 28.09 | -17.62% | $41.58 | $1.48 |
| Apr 2023 | 34.1 | -18.48% | $46.04 | $1.35 |
| Jan 2023 | 41.83 | -12.43% | $51.03 | $1.22 |
CIEN Price vs fair value
CIEN average PE ratio chart
What this chart measures
The Historical Valuation Regime chart shows where the stock's current valuation sits relative to its own historical valuation range over the selected lookback period.
This is a history-relative tool, not a market-relative percentile. It does not compare the stock to other companies. Instead, it compares each historical valuation reading to the stock's own past readings.
Percentile logic
The threshold lines are calculated them from the stock's real historical values using percentile interpolation. That is why some colored bands are narrow while others are wide: the band widths reflect how the stock actually traded through time.
Regime map
| Historical percentile | Regime | Chart meaning |
|---|---|---|
| 0-10 | Historically Low | Deep cheap zone |
| >10-25 | Below Average | Cheap relative to history |
| >25-75 | Average | Within the normal historical range |
| >75-90 | Above Average | Expensive relative to history |
| >90-100 | Historically High | Extreme or stretched valuation |
How to read each part
| Chart element | What it tells you |
|---|---|
| Main line | The actual historical valuation values over time for the selected metric. |
| Dashed horizontal lines | The stock's computed P10, P25, Median, P75, and P90 thresholds for the selected period. |
| Colored bands | The historical valuation zones between those thresholds. |
| Metric boxes | Current ratio, historical median, current percentile, and current regime. |
| Timeline strip | A condensed regime history showing how the stock moved between cheap, fair, and expensive states across each observation. |
Important metric definitions
Current Percentile is the percentile rank of the latest valid historical observation within the selected lookback range.
Current Regime is assigned directly from the latest observation's percentile bucket using the fixed 10 / 25 / 75 / 90 cutoffs shown above.
How to use it well
This chart is most useful for answering a narrow question: Is this stock trading high, low, or normal relative to its own history? It works best alongside growth, profitability, and forward-looking business analysis, because a stock can deserve a higher or lower regime if its business quality has changed.
The current PE ratio of CIEN is higher than its 5 and 10-year averages, but it is lower than its 3-year average.
PE comparison
With a price to earnings (P/E) of 75.66, CIEN ranks higher than the Technology sector and the industry average. In comparison with the Technology sector average of 33.11, CIENA's price to earnings (P/E) is 129% higher.
CIEN PE vs peers
Frequently asked questions
What is CIENA's PE ratio?
The price to earnings ratio for CIEN stock is 75.66 as of Sep 11, 2026.
What is the 3-year average PE ratio for CIENA (CIEN)?
The 3-year average price to earnings ratio for CIEN stock is 103.65.
What is the 5-year average PE ratio for CIENA (CIEN)?
The 5-year average price to earnings ratio for CIEN stock is 74.63.
What is the highest PE ratio for CIEN?
The highest quarterly PE ratio in the last ten years has been 218.3 and it was in the Nov 2025 quarter.
How does the current PE ratio for CIEN compare to its historical average?
CIEN's price to earnings ratio is currently 55% above its 10-year historical average.
Why is CIENA's PE ratio so high?
A company with a higher PE ratio may indicate that the market has higher growth expectations for the company's future earnings or profitability.
How is CIEN's PE ratio calculated (CIENA PE ratio formula)?
The P/E ratio is obtained by dividing the latest price of a stock by its trailing twelve months EPS. As of today (Sep 11, 2026), CIENA's share price is $349.54. The company's earnings per share for the trailing twelve months (TTM) ending Aug 2026 is $4.62. Therefore, CIENA's PE ratio for today is 75.66. PE RATIO(75.66) = STOCK PRICE($349.54) / TTM EPS($4.62)
All PE ratio stats are based on quarterly TTM periods, unless otherwise specified.