Question 1

What is Ciena's P/B ratio?

Accepted Answer

Ciena (CIEN) P/B ratio is 24.7× as of June 5, 2026. The ratio is calculated by dividing market capitalisation by book value of equity, using USD-normalised financials (IAS 21 exchange-rate translation for non-USD reporters).

Question 2

How is the P/B ratio calculated?

Accepted Answer

P/B = Market Capitalisation ÷ Book Value of Equity (most recent quarterly shareholders' equity), or equivalently Share Price ÷ Book Value Per Share. 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/B ratio?

Accepted Answer

The price-to-book (P/B) ratio compares a company's market capitalisation to its book value of equity (total shareholders' equity) on the most recent quarterly balance sheet. It is calculated as market cap ÷ book value of equity (equivalent to share price ÷ book value per share). A P/B below 1× implies the market values the business below its accounting net worth; values well above 1× reflect intangible assets, brand value, or a high return on equity.

Question 4

What is a good P/B ratio for Ciena?

Accepted Answer

A "good" P/B depends on the business model. Banks, insurers, and other capital-heavy financials typically trade near 1×; asset-light technology and consumer-brand companies can sustainably trade at 5×+ because much of their value is intangible. P/B is most informative when paired with return on equity (ROE). For Ciena specifically, the relevant sector benchmark is the current sector median of 6.0×.

Question 5

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

Accepted Answer

Ciena's P/B ratio of 24.7× is above its own 5-year average of 5.0× and above the sector median of 6.0×. That places the current reading at the 97th 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/B ratio range?

Accepted Answer

In the available daily series, Ciena (CIEN) P/B ratio has ranged from a low of 0.6× in 2009 to a high of 92.4× in 2011. The 5-year average is 5.0× and the 5-year median is 3.0×.

Question 7

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

Accepted Answer

Ciena (CIEN) P/B ratio at the end of 2025 was 9.8×. Annual values reflect the multiple on the last trading day of each calendar year, using the trailing twelve-month book value figure available at that date.

Question 8

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

Accepted Answer

Valuation multiples move with two inputs: the numerator (market capitalisation, which tracks the share price) and the denominator (book value). 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	$2.73B	9.8×	+6.6×	Nov 1, 2025
2024	$9.26B	$2.82B	3.3×	+1.1×	Nov 2, 2024
2023	$6.22B	$2.85B	2.2×	-0.4×	Oct 31, 2023
2022	$7.12B	$2.71B	2.6×	-0.2×	Oct 31, 2022
2021	$8.58B	$3.02B	2.8×	+0.4×	Oct 31, 2021
2020	$6.09B	$2.51B	2.4×	-0.2×	Oct 31, 2020
2019	$5.75B	$2.17B	2.6×	+0.3×	Oct 31, 2019
2018	$4.49B	$1.93B	2.3×	+0.9×	Oct 31, 2018
2017	$3.04B	$2.14B	1.4×	-2.1×	Oct 31, 2017
2016	$2.71B	$766.34M	3.5×	-1.7×	Oct 31, 2016
2015	$3.24B	$620.88M	5.2×	—	Oct 31, 2015
2014	$1.79B	−$69.61M	—	—	Oct 31, 2014
2013	$2.41B	−$82.68M	—	—	Oct 31, 2013
2012	$1.24B	−$88.97M	—	—	Oct 31, 2012
2011	$1.28B	$13.87M	92.4×	+84.4×	Oct 31, 2011
2010	$1.28B	$159.29M	8.0×	+5.7×	Oct 31, 2010
2009	$1.08B	$455.84M	2.4×	+1.5×	Oct 31, 2009
2008	$864.62M	$998.95M	0.9×	-4.0×	Oct 31, 2008
2007	$4.13B	$850.15M	4.9×	+2.2×	Oct 31, 2007
2006	$1.99B	$753.63M	2.6×	+0.8×	Oct 31, 2006
2005	$1.37B	$735.37M	1.9×	+0.7×	Oct 31, 2005
2004	$1.37B	$1.15B	1.2×	-1.1×	Oct 31, 2004
2003	$3.03B	$1.33B	2.3×	+1.2×	Oct 31, 2003
2002	$1.58B	$1.53B	1.0×	-1.5×	Oct 31, 2002
2001	$5.33B	$2.13B	2.5×	—	Oct 31, 2001


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P/B Ratio for Ciena (CIEN)

P/B Ratio daily chart for Ciena (CIEN)

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

About P/B Ratio at Ciena (CIEN)

Ciena P/B Ratio by Year

Ciena P/B Ratio 2025: 9.8×

Ciena P/B Ratio 2024: 3.3×

Ciena P/B Ratio 2023: 2.2×

Ciena P/B Ratio 2022: 2.6×

Ciena P/B Ratio 2021: 2.8×

Sector peers by P/B Ratio — chart

Sector peers by P/B Ratio — table

Frequently asked questions

Ciena (CIEN) Key Financials

P/B Ratio daily chart for Ciena (CIEN)

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

About P/B Ratio at Ciena (CIEN)

Ciena P/B Ratio by Year

Ciena P/B Ratio 2025: 9.8×

Ciena P/B Ratio 2024: 3.3×

Ciena P/B Ratio 2023: 2.2×

Ciena P/B Ratio 2022: 2.6×

Ciena P/B Ratio 2021: 2.8×

Sector peers by P/B Ratio — chart

Sector peers by P/B Ratio — table

Frequently asked questions

+What is Ciena's P/B ratio?

+How is the P/B ratio calculated?

+What is the P/B ratio?

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

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

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

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

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

Ciena (CIEN) Key Financials