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.
Inspecs GroupLSE:SPEC 45 3-Year Book Growth Rate is -9.50% as of Jun. 2026. GuruFocus rates LSE:SPEC with a GF Score™ of 45/100 and a GF Value™ of £0.58 (Significantly Overvalued). The stock has 6 warning signs investors should review. Among 757 Medical Devices & Instruments companies, Inspecs Group ranks worse than 72.92% on this metric.
During the past 12 months, Inspecs Group's average Book Value per Share Growth Rate was -8.60% per year.
During the past 3 years, the average Book Value per Share Growth Rate was -9.50% per year.
During the past 5 years, the average Book Value per Share Growth Rate was -5.50% 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 8 years, the highest 3-Year average Book Value per Share Growth Rate of Inspecs Group was 136.60% per year. The lowest was -74.80% per year. And the median was -9.50% per year.
Inspecs Group (LSE:SPEC) 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.
Inspecs Group 3-Year Book Growth Rate Related Terms
LSE:SPEC vs ISRG, BDX, RMD: 3-Year Book Growth Rate Comparison
For the Medical Instruments & Supplies subindustry, Inspecs 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.
Inspecs Group 3-Year Book Growth Rate vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Inspecs Group's 3-Year Book Growth Rate distribution charts can be found below:
* The bar in red indicates where Inspecs 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 -9.50% mean?
Inspecs Group (LSE:SPEC) has a 3-Year Book Growth Rate of -9.50% as of Jun. 2026. 3-Year Book Growth Rate is the 3-year average growth rate of Book Value per Share. View historical data for Inspecs Group and its competitors. According to the industry distribution chart, Inspecs Group ranks #552 out of 757 companies in the Medical Devices & Instruments industry, placing it in the top 72.9%.
Is Inspecs Group's 3-Year Book Growth Rate too high?
Inspecs Group's current 3-Year Book Growth Rate is -9.50%. Based on the distribution chart, Inspecs Group ranks #552 out of 757 companies in the Medical Devices & Instruments industry, which is below the industry midpoint. Overall, Inspecs Group has a GF Score™ of 45/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Inspecs Group's 3-Year Book Growth Rate compare to ISRG and BDX?
According to the Medical Devices & Instruments industry distribution chart, Inspecs Group ranks #552 out of 757 companies for 3-Year Book Growth Rate. This places Inspecs Group in the lower half of its industry. The industry median 3-Year Book Growth Rate is 2.30. 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 2.30, based on 757 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 Inspecs Group and its competitors. For the Medical Devices & Instruments industry, the median 3-Year Book Growth Rate is 2.30 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Inspecs Group's current 3-Year Book Growth Rate is -9.50%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Inspecs Group stock overvalued right now?
Based on GuruFocus' analysis, Inspecs Group (LSE:SPEC) is currently considered Significantly Overvalued. The stock's GF Value™ is £0.58, compared to a current price of £0.94 — trading 61.2% above its estimated fair value. The current 3-Year Book Growth Rate is -9.50%. Inspecs Group's overall GF Score™ is 45/100 with 6 warning signs 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 Inspecs Group (LSE:SPEC), the current 3-Year Book Growth Rate is -9.50% as of Jun. 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 Inspecs Group (LSE:SPEC) Overvalued in 2026?
Based on GuruFocus' analysis, Inspecs Group stock appears to be overvalued.
The current stock price of £0.94 is trading 61.2% above its estimated GF Value™ of £0.58.
GuruFocus considers Inspecs Group to be Significantly Overvalued.
Key valuation signals for LSE:SPEC:
3-Year Book Growth Rate: -9.50%
GF Value™: £0.58 vs. price of £0.94 (61.2% above fair value)
No single metric tells the full story. See the LSE:SPEC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Inspecs Group PLC is a designer and manufacturer of eyewear frames and accessories. The customers of the company include optical and Non-optical retailers, distributors, and independent opticians. The company operations are spread across the United Kingdom, Europe (excluding the UK), South America, North America, Asia, Africa, and Australia. Its eyewear brands include Superdry, Titanflex, O'Neill, Brendel, Humphreys, Marc O'Polo, and among others. The reporting segments of the company are Frames and Optics product distribution which derives maximum revenue, and Manufacturing includes OEM and manufacturing distribution segment.
45GF Score
Get the complete analysis for LSE:SPEC
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
LSE:SPEC has been successfully added to your 
