PE Ratio: 137.46

Basis: Latest stored market observation. 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 137.46 is 61% above its 5-year average of 85.20, around the middle of its 5-year range (15.46–415.22).

As of Saturday, August 8, 2026. 39.92% below its 12-month average of 228.78.

PE Ratio (137.46) = Close Price ($412.39) / Diluted TTM EPS ($3.00)

CIEN PE Ratio Metrics

P/E vs. its own history

At 137.5, P/E is richer than usual, sitting higher than 83% of 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 137.46.

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

The P/E ratio of 137.46 is 61% above its 5-year average of 85.20, around the middle 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 228.78.

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

The 3Y average P/E ratio for CIEN stock is 109.42.

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

The 5Y average P/E ratio for CIEN stock is 67.01.

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

The 10Y average P/E ratio for CIEN stock is 28.25.

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

The 15Y average P/E ratio for CIEN stock is 48.96.

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

The 20Y average P/E ratio for CIEN stock is 52.09.

Showing the most recent 260 of 3,161 data points. The chart above shows the full history.

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