Ciena Corporation (CIEN) P/E Ratio History
ExpensiveTrading at 433.6x vs 5Y avg 76.0x · 100th percentile · Material premium to history · Data 1997–2026
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P/E Ratio Analysis
As of September 23, 2026, Ciena Corporation (CIEN) trades at a price-to-earnings ratio of 433.6x, with a stock price of $368.56 and trailing twelve-month earnings per share of $4.48.
The current P/E is 471% above its 5-year average of 76.0x. Over the past five years, CIEN's P/E has ranged from a low of 17.0x to a high of 222.9x, placing the current valuation at the 100th percentile of its historical range.
Compared to the Technology sector median P/E of 29.9x, CIEN trades at a 1350% premium to its sector peers. The sector includes 365 companies with P/E ratios ranging from 0.0x to 199.0x.
Relative to the broader market, CIEN commands a significant premium over the S&P 500 median P/E of 25.5x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our CIEN DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
CIEN Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
CIEN P/E vs Peers
Optical Transport and Fiber Access peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $2B | 135.2 | - | +158% | |
| $9B | 242.7 | 53.17 | +225% | |
| $74B | 2555.9 | - | +105% | |
| $63B | 85.8 | - | -52% | |
| $32B | 12.1Lowest | 1.07Best | - | |
| $420B | 32.0 | 5.42 | +31% | |
| $61B | 260.8 | - | +329%Best | |
| $258B | 74.6 | 1.84 | +23% |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
CIEN Historical P/E Data (1997–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q3 | Aug 01 2026 | $377.05 | $4.48 | 84.2x | -92% |
| FY2026 Q2 | May 02 2026 | $535.29 | $3.00 | 178.4x | -83% |
| FY2026 Q1 | Jan 31 2026 | $251.81 | $1.57 | 160.2x | -84% |
| FY2025 Q4 | Nov 01 2025 | $189.92 | $0.85 | 222.9x | -78% |
| FY2025 Q3 | Aug 02 2025 | $88.63 | $0.97 | 91.2x | -91% |
| FY2025 Q2 | May 03 2025 | $72.85 | $0.72 | 101.2x | -90% |
| FY2025 Q1 | Feb 01 2025 | $87.14 | $0.54 | 162.0x | -84% |
| FY2024 Q4 | Nov 02 2024 | $63.97 | $0.57 | 112.6x | -89% |
| FY2024 Q3 | Jul 27 2024 | $50.16 | $0.94 | 53.5x | -95% |
| FY2024 Q2 | Apr 27 2024 | $46.61 | $1.04 | 44.8x | -96% |
| FY2024 Q1 | Jan 27 2024 | $51.42 | $1.54 | 33.4x | -97% |
| FY2023 Q4 | - | $42.20 | $1.71 | 24.7x | -98% |
| FY2023 Q3 | Jul 29 2023 | $41.58 | $1.48 | 28.1x | -97% |
| FY2023 Q2 | Apr 29 2023 | $46.04 | $1.35 | 34.1x | -97% |
| FY2023 Q1 | Jan 28 2023 | $51.03 | $1.22 | 41.8x | -96% |
| FY2022 Q4 | Oct 31 2022 | $47.90 | $1.00 | 47.9x | -95% |
| FY2022 Q3 | Jul 30 2022 | $51.60 | $1.27 | 40.6x | -96% |
| FY2022 Q2 | Apr 30 2022 | $55.17 | $2.72 | 20.3x | -98% |
| FY2022 Q1 | Jan 29 2022 | $64.75 | $3.13 | 20.7x | -98% |
| FY2021 Q4 | Oct 31 2021 | $54.29 | $3.19 | 17.0x | -98% |
| FY2021 Q3 | Jul 31 2021 | $58.14 | $2.95 | 19.7x | -98% |
| FY2021 Q2 | May 01 2021 | $50.47 | $2.34 | 21.6x | -98% |
| FY2021 Q1 | Jan 30 2021 | $53.39 | $2.27 | 23.5x | -98% |
| FY2020 Q4 | Oct 31 2020 | $39.39 | $2.32 | 17.0x | -98% |
| FY2020 Q3 | Aug 01 2020 | $59.51 | $2.41 | 24.7x | -98% |
| FY2020 Q2 | May 02 2020 | $46.34 | $2.05 | 22.6x | -98% |
| FY2020 Q1 | Jan 31 2020 | $40.67 | $1.79 | 22.7x | -98% |
| FY2019 Q4 | - | $37.12 | $1.60 | 23.2x | -98% |
| FY2019 Q3 | Jul 31 2019 | $45.22 | $1.43 | 31.6x | -97% |
| FY2019 Q2 | - | $38.36 | $1.22 | 31.4x | -97% |
| FY2019 Q1 | - | $38.09 | $0.98 | 38.9x | -96% |
| FY2018 Q3 | - | $25.40 | $4.46 | 5.7x | -99% |
| FY2018 Q2 | Apr 30 2018 | $25.75 | $4.51 | 5.7x | -99% |
| FY2018 Q1 | Jan 31 2018 | $21.28 | $4.67 | 4.6x | -100% |
| FY2017 Q4 | - | $21.27 | $7.99 | 2.7x | -100% |
| FY2017 Q3 | Jul 31 2017 | $25.75 | $0.92 | 28.0x | -97% |
| FY2017 Q2 | Apr 30 2017 | $22.91 | $0.76 | 30.1x | -97% |
| FY2017 Q1 | - | $24.34 | $0.61 | 39.9x | -96% |
| FY2016 Q4 | Oct 31 2016 | $19.38 | $0.50 | 39.1x | -96% |
| FY2016 Q3 | Jul 31 2016 | $19.19 | $0.15 | 131.9x | -87% |
| FY2016 Q2 | Apr 30 2016 | $16.83 | $0.11 | 159.5x | -84% |
| FY2016 Q1 | Jan 31 2016 | $17.77 | $0.18 | 101.3x | -90% |
| FY2015 Q4 | Oct 31 2015 | $24.14 | $0.09 | 268.2x | -74% |
| FY2008 Q4 | Oct 31 2008 | $9.61 | $0.35 | 27.5x | -97% |
| FY2008 Q3 | - | $20.67 | $0.98 | 21.1x | -98% |
| FY2008 Q2 | Apr 30 2008 | $33.81 | $1.15 | 29.4x | -97% |
| FY2008 Q1 | - | $27.13 | $1.06 | 25.6x | -98% |
| FY2007 Q4 | Oct 31 2007 | $47.86 | $0.90 | 53.2x | -95% |
| FY2007 Q3 | - | $36.53 | $0.70 | 52.2x | -95% |
| FY2007 Q2 | Apr 30 2007 | $29.16 | $0.36 | 81.2x | -92% |
| FY2007 Q1 | Jan 31 2007 | $28.09 | $0.20 | 143.2x | -86% |
| FY2006 Q4 | - | $23.51 | $0.00 | 58775.0x | +5634% |
| FY2001 Q3 | - | $231.98 | $0.87 | 266.6x | -74% |
| FY2001 Q2 | Apr 30 2001 | $385.42 | $1.39 | 277.3x | -73% |
| FY2001 Q1 | Jan 31 2001 | $630.44 | $2.97 | 212.3x | -79% |
| FY2000 Q4 | - | $735.88 | $1.92 | 383.3x | -63% |
| FY2000 Q3 | Jul 31 2000 | $497.44 | $1.40 | 355.3x | -65% |
| FY2000 Q2 | Apr 30 2000 | $432.69 | $0.60 | 721.1x | -30% |
| FY2000 Q1 | Jan 31 2000 | $229.69 | $0.11 | 2088.1x | +104% |
| FY1999 Q1 | Jan 31 1999 | $70.66 | $0.29 | 243.8x | -76% |
| FY1998 Q4 | Oct 31 1998 | $60.16 | $1.69 | 35.6x | -97% |
| FY1998 Q3 | Jul 31 1998 | $259.22 | $3.12 | 83.1x | -92% |
| FY1998 Q2 | - | $195.13 | $4.32 | 45.2x | -96% |
| FY1998 Q1 | Jan 31 1998 | $192.72 | $4.81 | 40.1x | -96% |
| FY1997 Q4 | Oct 31 1997 | $192.50 | $3.97 | 48.5x | -95% |
Average P/E for displayed period: 1025.0x
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Peer Comparison
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CIEN — Frequently Asked Questions
Quick answers to the most common questions about buying CIEN stock.
What is CIEN's P/E ratio?
Ciena Corporation (CIEN) trailing twelve-month P/E ratio is 433.6x, based on TTM diluted EPS of $4.48. The 5-year average P/E is 76.0x and the historical range spans 17.0x to 222.9x.
Is CIEN stock overvalued or undervalued?
CIEN trades at 433.6x P/E, above its 5-year average of 76.0x. The 100th percentile ranking within the 17.0x–222.9x historical range indicates a premium to historical valuation.
Is CIEN stock expensive?
Yes, CIEN is expensive relative to its own history. The current P/E of 433.6x is above the 5-year average of 76.0x and also above the Technology sector median of 29.9x. The stock sits at the 100th percentile of its 5-year valuation range.
What is CIEN's historical P/E range?
Over the past 5 years, CIEN's P/E ratio has ranged from 17.0x to 222.9x, with a median of 47.9x and an average of 76.0x. The current P/E of 433.6x places the stock at the 100th percentile of this range. Full historical data spans 1997–2026.
How does CIEN's P/E compare to the S&P 500?
CIEN trades at 433.6x P/E versus the S&P 500 median of 25.5x. The 1600% premium to the market typically reflects higher expected earnings growth or quality.
How does CIEN's valuation compare to Technology peers?
Ciena Corporation P/E of 433.6x compares to the Technology sector median of 29.9x. The premium reflects expected growth above peers or stronger fundamentals. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is CIEN's PEG ratio?
CIEN PEG ratio is N/A, based on a P/E of 433.6x and EPS growth of 46.6%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is CIEN's earnings yield?
CIEN earnings yield is 0.23%, the inverse of its 433.6x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.