Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
Adtran Networks SEADVOF 56 Shiller PE Ratio is 186.08 as of Jul. 18, 2026, which is 297% above its 10-year median of 46.87. GuruFocus rates ADVOF with a GF Score™ of 56/100 and a GF Value™ of $20.91. The stock has 4 warning signs investors should review. Among 1,421 Hardware companies, Adtran Networks SE ranks worse than 92.4% on this metric.
The historical rank and industry rank for Adtran Networks SE's Shiller PE Ratio or its related term are showing as below:
ADVOF'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 16.41 Med: 46.87 Max: 193.92
Current: 193.92
During the past 13 years, Adtran Networks SE's highest Shiller PE Ratio was 193.92. The lowest was 16.41. And the median was 46.87.
ADVOF's Shiller PE Ratio is ranked worse than 92.4% of 1421
companies
in the Hardware industry
Industry Median: 31.21
vs ADVOF: 193.92
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
Adtran Networks SE's adjusted earnings per share data of for the fiscal year that ended in Dec25 was $-0.492. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $0.13 for the trailing ten years ended in Dec25.
Shiller PE for Stocks: The True Measure of Stock Valuation
Adtran Networks SE (OTCPK:ADVOF) Shiller PE Ratio Explanation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Adtran Networks SE Shiller PE Ratio Related Terms
Adtran Networks SE Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Adtran Networks SE's Shiller PE Ratio can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
ADVOF vs CSCO, CIEN, MSI: Shiller PE Ratio Comparison
For the Communication Equipment subindustry, Adtran Networks SE's Shiller PE Ratio, along with its competitors' market caps and Shiller PE Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Adtran Networks SE Shiller PE Ratio vs Hardware Industry
For the Hardware industry and Technology sector, Adtran Networks SE's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Adtran Networks SE's Shiller PE Ratio falls into.
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Add all the adjusted EPS together and divide 10 will get our E10.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
Adtran Networks SE (ADVOF) has a Shiller PE Ratio of 186.08 as of Jul. 18, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Adtran Networks SE and its competitors. This is 297% above median its historical median of 46.87. Over the past decade, Adtran Networks SE's Shiller PE Ratio has ranged from 16.41 to 193.92. According to the industry distribution chart, Adtran Networks SE ranks #1313 out of 1421 companies in the Hardware industry, placing it in the top 92.4%.
Is Adtran Networks SE's Shiller PE Ratio too high?
Adtran Networks SE's current Shiller PE Ratio of 186.08 is 297% above median its 10-year median of 46.87. Over the past 10 years, this metric has ranged from a low of 16.41 to a high of 193.92. The Hardware industry median Shiller PE Ratio is 31.21. Adtran Networks SE's value of 186.08 is 496.2% above this industry median. Based on the distribution chart, Adtran Networks SE ranks #1313 out of 1421 companies in the Hardware industry, which is in the bottom quartile relative to peers. Overall, Adtran Networks SE has a GF Score™ of 56/100, reflecting its overall financial health beyond just this single metric.
How does Adtran Networks SE's Shiller PE Ratio compare to CSCO and CIEN?
According to the Hardware industry distribution chart, Adtran Networks SE ranks #1313 out of 1421 companies for Shiller PE Ratio. This places Adtran Networks SE in the lower half of its industry. The industry median Shiller PE Ratio is 31.21. Adtran Networks SE's value of 186.08 is 496.2% above this benchmark. Historically, Adtran Networks SE's own Shiller PE Ratio has ranged from 16.41 to 193.92 over the past decade. While the company's 10-year median is 46.87 vs. the industry median of 31.21, Adtran Networks SE has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Shiller PE Ratio for a Hardware company?
The median Shiller PE Ratio among Hardware companies is 31.21, based on 1,421 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Adtran Networks SE's current Shiller PE Ratio of 186.08 is 496.2% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Adtran Networks SE and its competitors. For the Hardware industry, the median Shiller PE Ratio is 31.21 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Adtran Networks SE's current Shiller PE Ratio is 186.08, which is 297% above median its own 10-year median of 46.87. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Adtran Networks SE stock overvalued right now?
Adtran Networks SE (ADVOF) has a current Shiller PE Ratio of 186.08. The stock's GF Value™ is $20.91, compared to a current price of $24.19 — trading 15.7% above its estimated fair value. The current Shiller PE Ratio is 186.08, which is 297% above median its 10-year median of 46.87 and 496.2% above the Hardware industry median of 31.21. Adtran Networks SE's overall GF Score™ is 56/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Adtran Networks SE (ADVOF), the current Shiller PE Ratio is 186.08 as of Jul. 18, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Adtran Networks SE (ADVOF) Overvalued in 2026?
Based on GuruFocus' analysis, Adtran Networks SE stock appears to be overvalued.
The current stock price of $24.19 is trading 15.7% above its estimated GF Value™ of $20.91.
Key valuation signals for ADVOF:
Shiller PE Ratio: 186.08 (297% above median its 10-year median of 46.87)
GF Value™: $20.91 vs. price of $24.19 (15.7% above fair value)
Industry Position: 496.2% above the Hardware median (#1313 of 1421)
No single metric tells the full story. See the ADVOF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Adtran Networks SE develops, manufactures, and sells optical and Ethernet-based networking solutions to telecommunications carriers and enterprises to deliver data, storage, voice, and video services. Company segment includes: Network Solutions; and Services and Support,These systems are used by telecommunications service providers, private companies, universities, and government agencies. Some of its product categories are Open optical transport, Packet edge and aggregation, Disaggregated networking, Network virtualization, Network infrastructure assurance, and Automated network management. ADVA's geographical segments are United States, United Kingdom, Germany and Other international generating key revenue from United States.
56GF Score
Get the complete analysis for ADVOF
Shiller PE Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
ADVOF has been successfully added to your 
