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Ribbon CommunicationsSTU:NU42 -10.76%55 Cyclically Adjusted PB Ratio is 0.34 as of Sep. 17, 2026, which is 55% below its 10-year median of 0.75. GuruFocus rates STU:NU42 with a GF Score™ of 55/100 and a GF Value™ of €2.51 (Possible Value Trap). The stock has 3 warning signs investors should review. Among 1,464 Software companies, Ribbon Communications ranks better than 89.62% on this metric.
The historical rank and industry rank for Ribbon Communications's Cyclically Adjusted PB Ratio or its related term are showing as below:
STU:NU42'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0.34 Med: 0.75 Max: 1.8
Current: 0.43
During the past years, Ribbon Communications's highest Cyclically Adjusted PB Ratio was 1.80. The lowest was 0.34. And the median was 0.75.
STU:NU42's Cyclically Adjusted PB Ratio is ranked better than 89.62% of 1464
companies
in the Software industry
Industry Median: 2.34
vs STU:NU42: 0.43
The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.
Ribbon Communications's adjusted book value per share data for the three months ended in Jun. 2026 was €1.921. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is €4.09 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Ribbon Communications (STU:NU42) Cyclically Adjusted PB Ratio Explanation
Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.
Ribbon Communications Cyclically Adjusted PB Ratio Related Terms
Ribbon Communications Cyclically Adjusted PB Ratio Historical Data
* Premium members only.
The historical data trend for Ribbon Communications's Cyclically Adjusted PB 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.
Ribbon Communications Cyclically Adjusted PB Ratio Chart
STU:NU42 vs SVMB, BLND, ALIT: Cyclically Adjusted PB Ratio Comparison
For the Software - Application subindustry, Ribbon Communications's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB 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.
Ribbon Communications Cyclically Adjusted PB Ratio vs Software Industry
For the Software industry and Technology sector, Ribbon Communications's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where Ribbon Communications's Cyclically Adjusted PB Ratio falls into.
Ribbon Communications Cyclically Adjusted PB Ratio Calculation
Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.
* 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.
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.
What does a Cyclically Adjusted PB Ratio of 0.34 mean?
Ribbon Communications (STU:NU42) has a Cyclically Adjusted PB Ratio of 0.34 as of Sep. 17, 2026. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Ribbon Communications and its competitors. This is 55% below median its historical median of 0.75. Over the past decade, Ribbon Communications' Cyclically Adjusted PB Ratio has ranged from 0.34 to 1.80. According to the industry distribution chart, Ribbon Communications ranks #152 out of 1464 companies in the Software industry, placing it in the top 10.4%.
Is Ribbon Communications' Cyclically Adjusted PB Ratio too high?
Ribbon Communications' current Cyclically Adjusted PB Ratio of 0.34 is 55% below median its 10-year median of 0.75. Over the past 10 years, this metric has ranged from a low of 0.34 to a high of 1.80. The Software industry median Cyclically Adjusted PB Ratio is 2.34. Ribbon Communications' value of 0.34 is 85.5% below this industry median. Based on the distribution chart, Ribbon Communications ranks #152 out of 1464 companies in the Software industry, which is in the top quartile — a strong position relative to peers. Overall, Ribbon Communications has a GF Score™ of 55/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does Ribbon Communications' Cyclically Adjusted PB Ratio compare to SVMB and BLND?
According to the Software industry distribution chart, Ribbon Communications ranks #152 out of 1464 companies for Cyclically Adjusted PB Ratio. This places Ribbon Communications in the top 10% of its industry — outperforming the majority of peers. The industry median Cyclically Adjusted PB Ratio is 2.34. Ribbon Communications' value of 0.34 is 85.5% below this benchmark. Historically, Ribbon Communications' own Cyclically Adjusted PB Ratio has ranged from 0.34 to 1.80 over the past decade. While the company's 10-year median is 0.75 vs. the industry median of 2.34, Ribbon Communications has consistently been below 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 Cyclically Adjusted PB Ratio for a Software company?
The median Cyclically Adjusted PB Ratio among Software companies is 2.34, based on 1,464 companies in the industry. Companies in the top quartile (top 25%) have a Cyclically Adjusted PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, Cyclically Adjusted PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Ribbon Communications's current Cyclically Adjusted PB Ratio of 0.34 is 85.5% below 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 Cyclically Adjusted PB Ratio mean?
A high Cyclically Adjusted PB Ratio can signal that a stock is expensive relative to its fundamentals. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Ribbon Communications and its competitors. For the Software industry, the median Cyclically Adjusted PB Ratio is 2.34 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Ribbon Communications's current Cyclically Adjusted PB Ratio is 0.34, which is 55% below median its own 10-year median of 0.75. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Ribbon Communications stock overvalued right now?
Based on GuruFocus' analysis, Ribbon Communications (STU:NU42) is currently considered Possible Value Trap. The stock's GF Value™ is €2.51, compared to a current price of €1.41 — trading 43.8% below its estimated fair value. The current Cyclically Adjusted PB Ratio is 0.34, which is 55% below median its 10-year median of 0.75 and 85.5% below the Software industry median of 2.34. Ribbon Communications' overall GF Score™ is 55/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted PB Ratio calculated?
Cyclically Adjusted PB Ratio is calculated from a company's financial statements. For Ribbon Communications (STU:NU42), the current Cyclically Adjusted PB Ratio is 0.34 as of Sep. 17, 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 Ribbon Communications (STU:NU42) Overvalued in 2026?
Based on GuruFocus' analysis, Ribbon Communications stock appears to be undervalued.
The current stock price of €1.41 is trading 43.8% below its estimated GF Value™ of €2.51.
GuruFocus considers Ribbon Communications to be Possible Value Trap.
Key valuation signals for STU:NU42:
Cyclically Adjusted PB Ratio: 0.34 (55% below median its 10-year median of 0.75)
GF Value™: €2.51 vs. price of €1.41 (43.8% below fair value)
Industry Position: 85.5% below the Software median (#152 of 1464)
No single metric tells the full story. See the STU:NU42 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Ribbon Communications Inc provides communications technology to service providers and enterprises, offering software and high-performance hardware products, network solutions, and services for secure data and voice communications, as well as high-bandwidth networking for residential and enterprise customers across industries such as finance, education, government, utilities, and transportation. It operates through two segments: Cloud and Edge, which generate maximum revenue and deliver software-centric, cloud-native solutions for VoIP, VoLTE, VoNR, and unified communications, and IP Optical Networks, which support growing telecommunications traffic from 5G, distributed cloud computing, and other applications. The Company generates the majority of its revenue from the United States.
55GF Score
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