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.
NIOX GroupCSSPF 77 3-Year Book Growth Rate is -6.00% as of Dec. 2025. GuruFocus rates CSSPF with a GF Score™ of 77/100 and a GF Value™ of $1.21 (Significantly Undervalued). The stock has 1 warning sign investors should review. Among 762 Medical Devices & Instruments companies, NIOX Group ranks worse than 68.24% on this metric.
During the past 12 months, NIOX Group's average Book Value per Share Growth Rate was 8.00% per year.
During the past 3 years, the average Book Value per Share Growth Rate was -6.00% per year.
During the past 5 years, the average Book Value per Share Growth Rate was -0.80% per year.
During the past 10 years, the average Book Value per Share Growth Rate was -19.30% per year.
Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the average Book Value per Share growth rate.
During the past 13 years, the highest 3-Year average Book Value per Share Growth Rate of NIOX Group was 114.50% per year. The lowest was -38.80% per year. And the median was -5.40% per year.
NIOX Group (OTCPK:CSSPF) 3-Year Book Growth Rate Explanation
Book Value per Share is the ratio of equity available to common shareholders divided by the shares outstanding. Book value per share effectively indicates a firm's net asset value on a per-share basis. It can be used by investors to gauge whether a stock price is undervalued by comparing it to the firm's market value per share. Theoretically, it is what the shareholders will receive if the company is liquidated.
NIOX Group 3-Year Book Growth Rate Related Terms
CSSPF vs ABT, SYK, MDT: 3-Year Book Growth Rate Comparison
For the Medical Devices subindustry, NIOX Group's 3-Year Book Growth Rate, along with its competitors' market caps and 3-Year Book Growth Rate 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.
NIOX Group 3-Year Book Growth Rate vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, NIOX Group's 3-Year Book Growth Rate distribution charts can be found below:
* The bar in red indicates where NIOX Group's 3-Year Book Growth Rate falls into.
This is the 3-year average growth rate of Book Value per Share. The growth rate is calculated using exponential compounding based on the latest four year annual data.
Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the average Book Value per Share growth rate.
What does a 3-Year Book Growth Rate of -6.00% mean?
NIOX Group (CSSPF) has a 3-Year Book Growth Rate of -6.00% as of Dec. 2025. 3-Year Book Growth Rate is the 3-year average growth rate of Book Value per Share. View historical data for NIOX Group and its competitors. According to the industry distribution chart, NIOX Group ranks #520 out of 762 companies in the Medical Devices & Instruments industry, placing it in the top 68.2%.
Is NIOX Group's 3-Year Book Growth Rate too high?
NIOX Group's current 3-Year Book Growth Rate is -6.00%. Based on the distribution chart, NIOX Group ranks #520 out of 762 companies in the Medical Devices & Instruments industry, which is below the industry midpoint. Overall, NIOX Group has a GF Score™ of 77/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does NIOX Group's 3-Year Book Growth Rate compare to ABT and SYK?
According to the Medical Devices & Instruments industry distribution chart, NIOX Group ranks #520 out of 762 companies for 3-Year Book Growth Rate. This places NIOX Group in the lower half of its industry. The industry median 3-Year Book Growth Rate is 2.35. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 3-Year Book Growth Rate for a Medical Devices & Instruments company?
The median 3-Year Book Growth Rate among Medical Devices & Instruments companies is 2.35, based on 762 companies in the industry. Companies in the top quartile (top 25%) have a 3-Year Book Growth Rate significantly above this median, while those in the bottom quartile fall well below. However, 3-Year Book Growth Rate should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high 3-Year Book Growth Rate mean?
A high 3-Year Book Growth Rate can signal that a stock is expensive relative to its fundamentals. 3-Year Book Growth Rate is the 3-year average growth rate of Book Value per Share. View historical data for NIOX Group and its competitors. For the Medical Devices & Instruments industry, the median 3-Year Book Growth Rate is 2.35 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. NIOX Group's current 3-Year Book Growth Rate is -6.00%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is NIOX Group stock overvalued right now?
Based on GuruFocus' analysis, NIOX Group (CSSPF) is currently considered Significantly Undervalued. The stock's GF Value™ is $1.21, compared to a current price of $0.75 — trading 38% below its estimated fair value. The current 3-Year Book Growth Rate is -6.00%. NIOX Group's overall GF Score™ is 77/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 3-Year Book Growth Rate calculated?
3-Year Book Growth Rate is calculated from a company's financial statements. For NIOX Group (CSSPF), the current 3-Year Book Growth Rate is -6.00% as of Dec. 2025. 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 NIOX Group (CSSPF) Overvalued in 2026?
Based on GuruFocus' analysis, NIOX Group stock appears to be undervalued.
The current stock price of $0.75 is trading 38% below its estimated GF Value™ of $1.21.
GuruFocus considers NIOX Group to be Significantly Undervalued.
Key valuation signals for CSSPF:
3-Year Book Growth Rate: -6.00%
GF Value™: $1.21 vs. price of $0.75 (38% below fair value)
No single metric tells the full story. See the CSSPF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
NIOX Group PLC is engaged in improving the diagnosis, monitoring and management of both asthma and COPD by providing greater patient access to FeNO testing. The company is engaged in the design, development, and commercialization of medical devices for the measurement of FeNO, a precise biomarker for type 2 inflammation which is present in asthma and COPD. Its device, NIOX VERO, is increasingly recognised by healthcare professionals as an important tool to improve the diagnosis, monitoring and management of asthma and COPD. It operates in single segment of NIOX relates to the portfolio of products used to improve asthma diagnosis, monitoring and management by measuring fractional exhaled nitric oxide (FeNO).
77GF Score
Get the complete analysis for CSSPF
3-Year Book Growth Rate is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
CSSPF has been successfully added to your 
