Question 1

What is Ciena's P/E ratio?

Accepted Answer

Ciena (CIEN) P/E ratio is 163.0× as of June 5, 2026. The ratio is calculated by dividing market capitalisation by trailing twelve-month earnings (net income), using USD-normalised financials (IAS 21 exchange-rate translation for non-USD reporters).

Question 2

How is the P/E ratio calculated?

Accepted Answer

P/E = Share Price ÷ Trailing Twelve-Month (TTM) Diluted EPS, or equivalently Market Capitalisation ÷ TTM Net Income. All inputs are sourced from audited GAAP/IFRS filings and translated to USD using period-end exchange rates so the multiple is comparable across companies and currencies.

Question 3

What is the P/E ratio?

Accepted Answer

The price-to-earnings (P/E) ratio, also called the earnings multiple, measures how much investors pay per dollar of a company's trailing twelve-month (TTM) earnings. It is calculated as share price ÷ TTM diluted EPS (equivalent to market capitalisation ÷ TTM net income). A higher P/E implies the market is pricing in stronger future earnings growth or lower risk; a lower P/E can signal slower expected growth, higher risk, or potential undervaluation.

Question 4

What is a good P/E ratio for Ciena?

Accepted Answer

There is no universal "good" P/E. As a rule of thumb, the S&P 500 has historically averaged a P/E in the mid-to-high teens; mature, slow-growth businesses commonly trade in the 10–18× range, while high-growth or asset-light companies often trade at 25–50×+. What matters is the comparison to sector peers and to the company's own historical range. For Ciena specifically, the relevant sector benchmark is the current sector median of 29.6×.

Question 5

Is Ciena's P/E ratio high or low?

Accepted Answer

Ciena's P/E ratio of 163.0× is above its own 5-year average of 66.6× and above the sector median of 29.6×. That places the current reading at the 87th percentile of its 10-year history. A higher multiple usually reflects stronger expected growth, lower perceived risk, or higher returns on capital; a lower multiple reflects the opposite.

Question 6

What is Ciena's historical P/E ratio range?

Accepted Answer

In the available daily series, Ciena (CIEN) P/E ratio has ranged from a low of 2.4× in 2017 to a high of 3345.0× in 2006. The 5-year average is 66.6× and the 5-year median is 40.2×.

Question 7

What was Ciena's P/E ratio in 2025?

Accepted Answer

Ciena (CIEN) P/E ratio at the end of 2025 was 217.9×. Annual values reflect the multiple on the last trading day of each calendar year, using the trailing twelve-month earnings figure available at that date.

Question 8

Why does Ciena's P/E ratio change over time?

Accepted Answer

Valuation multiples move with two inputs: the numerator (market capitalisation, which tracks the share price) and the denominator (earnings). Share-price changes — driven by interest rates, earnings expectations, risk appetite, and broader market sentiment — typically dominate short-term moves, while changes in the underlying fundamental drive the longer-term trend. As a result, the ratio can rise during stock-price rallies even if the business itself has not become more valuable, and fall during sell-offs even when fundamentals are improving.


2025	$26.88B	$123.34M	217.9×	+137.5×	Nov 1, 2025
2024	$9.26B	$115.03M	80.5×	+56.1×	Nov 2, 2024
2023	$6.22B	$254.83M	24.4×	-22.1×	Oct 31, 2023
2022	$7.12B	$152.90M	46.5×	+29.4×	Oct 31, 2022
2021	$8.58B	$500.20M	17.1×	+0.3×	Oct 31, 2021
2020	$6.09B	$361.29M	16.9×	-5.8×	Oct 31, 2020
2019	$5.75B	$253.43M	22.7×	—	Oct 31, 2019
2018	$4.49B	−$344.69M	—	—	Oct 31, 2018
2017	$3.04B	$1.26B	2.4×	-34.9×	Oct 31, 2017
2016	$2.71B	$72.58M	37.3×	-240.1×	Oct 31, 2016
2015	$3.24B	$11.67M	277.5×	—	Oct 31, 2015
2014	$1.79B	−$40.64M	—	—	Oct 31, 2014
2013	$2.41B	−$85.43M	—	—	Oct 31, 2013
2012	$1.24B	−$144.02M	—	—	Oct 31, 2012
2011	$1.28B	−$195.52M	—	—	Oct 31, 2011
2010	$1.28B	−$333.51M	—	—	Oct 31, 2010
2009	$1.08B	−$581.15M	—	—	Oct 31, 2009
2008	$864.62M	$38.89M	22.2×	-27.7×	Oct 31, 2008
2007	$4.13B	$82.79M	49.9×	-3295.1×	Oct 31, 2007
2006	$1.99B	$595.00K	3345.0×	—	Oct 31, 2006
2005	$1.37B	−$435.70M	—	—	Oct 31, 2005
2004	$1.37B	−$789.46M	—	—	Oct 31, 2004
2003	$3.03B	−$386.52M	—	—	Oct 31, 2003
2002	$1.58B	−$1.60B	—	—	Oct 31, 2002
2001	$5.33B	−$1.79B	—	—	Oct 31, 2001


NXP Semiconductors (NXPI)	17.9×
Uber (UBER)	17.3×
Broadridge Financial Solutions (BR)	17.2×
NetApp (NTAP)	16.8×
Accenture (ACN)	16.8×
Corpay (CPAY)	16.7×
Dell Technologies (DELL)	16.2×
Western Digital (WDC)	15.7×
Adobe (ADBE)	14.9×
CDW (CDW)	14.5×
Zoom Communications (ZM)	13.8×
QUALCOMM (QCOM)	13.7×
PTC (PTC)	13.5×
Paycom Software (PAYC)	13.2×
Elastic N.V. (ESTC)	13.2×
Cognizant (CTSH)	13.1×
GoDaddy (GDDY)	12.7×
Gen Digital (GEN)	11.7×
Duolingo (DUOL)	10.9×
Super Micro Computer (SMCI)	10.9×
Science Applications International (SAIC)	10.3×
Fiserv (FISV)	9.3×
Fidelity National Information Services (FIS)	9.0×
HP (HPQ)	7.5×
Lyft (LYFT)	1.8×

P/E Ratio for Ciena (CIEN)

P/E Ratio daily chart for Ciena (CIEN)

Historical P/E Ratio for Ciena (CIEN) from 2001 to 2025

About P/E Ratio at Ciena (CIEN)

Ciena P/E Ratio by Year

Ciena P/E Ratio 2025: 217.9×

Ciena P/E Ratio 2024: 80.5×

Ciena P/E Ratio 2023: 24.4×

Ciena P/E Ratio 2022: 46.5×

Ciena P/E Ratio 2021: 17.1×

Sector peers by P/E Ratio — chart

Sector peers by P/E Ratio — table

Frequently asked questions

Ciena (CIEN) Key Financials

P/E Ratio daily chart for Ciena (CIEN)

Historical P/E Ratio for Ciena (CIEN) from 2001 to 2025

About P/E Ratio at Ciena (CIEN)

Ciena P/E Ratio by Year

Ciena P/E Ratio 2025: 217.9×

Ciena P/E Ratio 2024: 80.5×

Ciena P/E Ratio 2023: 24.4×

Ciena P/E Ratio 2022: 46.5×

Ciena P/E Ratio 2021: 17.1×

Sector peers by P/E Ratio — chart

Sector peers by P/E Ratio — table

Frequently asked questions

+What is Ciena's P/E ratio?

+How is the P/E ratio calculated?

+What is the P/E ratio?

+What is a good P/E ratio for Ciena?

+Is Ciena's P/E ratio high or low?

+What is Ciena's historical P/E ratio range?

+What was Ciena's P/E ratio in 2025?

+Why does Ciena's P/E ratio change over time?

Ciena (CIEN) Key Financials