PE Ratio: 79.77

Basis: FMP quote price / unrounded diluted EPS from four consecutive issuer fiscal quarters. Source: stored company filings and market data; unavailable inputs remain N/A.

Is the P/E ratio high or low?

The P/E ratio of 79.77 is 34% above its 5-year average of 59.46, near the low end of its 5-year range (15.46–415.22).

As of 2026-09-24T15:45:17.034Z. 65.19% below its 12-month average of 229.16.

PE Ratio (79.77) = Close Price ($357.36) / Diluted TTM EPS ($4.48)

CIEN PE Ratio Metrics

P/E vs. its own history

At 79.8, P/E is above its 20-year median — higher than 74% of readings in its 20-year history.

P/E Comparison

PE Ratio Formula & Definition

PE Ratio = Share Price / Diluted EPS (TTM)

The price-to-earnings ratio measures how much investors pay for each dollar of trailing earnings. A lower PE can indicate a cheaper valuation; a higher PE implies higher growth expectations.

Expanded definitions: Investopedia, Wikipedia, Corporate Finance Institute

PE Ratio FAQ

What is the P/E ratio for Ciena Corporation (CIEN)?

The P/E ratio for CIEN stock is 79.77.

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

The P/E ratio of 79.77 is 34% above its 5-year average of 59.46, near the low end of its 5-year range (15.46–415.22).

What is the TTM average P/E ratio for Ciena Corporation (CIEN)?

The TTM average P/E ratio for CIEN stock is 229.16.

What is the 3Y average P/E ratio for Ciena Corporation (CIEN)?

The 3Y average P/E ratio for CIEN stock is 100.33.

What is the 5Y average P/E ratio for Ciena Corporation (CIEN)?

The 5Y average P/E ratio for CIEN stock is 59.46.

What is the 10Y average P/E ratio for Ciena Corporation (CIEN)?

The 10Y average P/E ratio for CIEN stock is 28.71.

What is the 15Y average P/E ratio for Ciena Corporation (CIEN)?

The 15Y average P/E ratio for CIEN stock is 43.40.

What is the 20Y average P/E ratio for Ciena Corporation (CIEN)?

The 20Y average P/E ratio for CIEN stock is 48.03.

Showing the most recent 260 of 3,184 data points. The chart above shows the full history.

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