What is CIEN's five-year median P/E?

The median, or middle weekly reading, is 46.7× over the last five years. Available history contains 533 weekly observations from Aug 8, 2016 to Oct 19, 2026.

Does a low historical rank mean a stock is a buy?

No. The rank describes a stock’s own history. Changes in growth, financial risk and the business can change the multiple investors pay. P/E uses earnings and P/S uses revenue from the previous twelve months.

Ciena (CIEN) valuation history

Within its usual range

As of Oct 22, 2026

CIEN's P/E of 80.7x is higher than 65% of its available weekly readings from the last five years.

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P/E at year-end

Last weekly reading of each completed year. Rank runs from lowest (0%) to highest (100%) within the five years available on that date.

CIEN year-end valuation history
Reading date	P/E	5-year rank
Dec 29, 2025	289.5×	100%
Dec 30, 2024	144.2×	99%
Dec 25, 2023	26.3×	31%
Dec 26, 2022	51.5×	100%
Dec 27, 2021	24.1×	37%
Dec 28, 2020	43.0×	78%
Dec 30, 2019	34.0×	58%
Dec 31, 2018	Unavailable	Short history
Dec 25, 2017	2.8×	1%
Dec 26, 2016	48.8×	Short history

Peers on the same measure

Stock	P/E	5-year rank
ANETArista Networks	58.2×	91%
AAPLApple	39.5×	96%
ACNAccenture	17.7×	12%
ADBEAdobe	14.2×	6%

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About this history

What is CIEN's current P/E?: CIEN's P/E of 80.7x is higher than 65% of its available weekly readings from the last five years.
What is CIEN's five-year median P/E?: The median, or middle weekly reading, is 46.7× over the last five years. Available history contains 533 weekly observations from Aug 8, 2016 to Oct 19, 2026.
Does a low historical rank mean a stock is a buy?: No. The rank describes a stock’s own history. Changes in growth, financial risk and the business can change the multiple investors pay. P/E uses earnings and P/S uses revenue from the previous twelve months.