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LuxNetROCO:4979 -4.39%61 PB Ratio is 13.87 as of Jul. 16, 2026, which is 498% above its 10-year median of 2.32. GuruFocus rates ROCO:4979 with a GF Score™ of 61/100 and a GF Value™ of NT$261.95 (Significantly Overvalued). The stock has 1 warning sign investors should review. Among 998 Semiconductors companies, LuxNet ranks worse than 90.98% on this metric.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. As of today (2026-07-16), LuxNet's share price is NT$392.00. LuxNet's Book Value per Share for the quarter that ended in Dec. 2025 was NT$28.25. Hence, LuxNet's PB Ratio of today is 13.87.
The historical rank and industry rank for LuxNet's PB Ratio or its related term are showing as below:
ROCO:4979'
s PB Ratio Range Over the Past 10 Years
Min: 1.05 Med: 2.32 Max: 23.36
Current: 13.87
During the past 13 years, LuxNet's highest PB Ratio was 23.36. The lowest was 1.05. And the median was 2.32.
ROCO:4979's PB Ratio is ranked worse than 90.98% of 998
companies
in the Semiconductors industry
Industry Median: 3.455
vs ROCO:4979: 13.87
During the past 12 months, LuxNet's average Book Value Per Share Growth Rate was 17.10% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was 38.60% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 25.20% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was 1.60% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of LuxNet was 38.60% per year. The lowest was -25.40% per year. And the median was 14.20% per year.
The PB Ratio works the best for the businesses that earn most of their profit from their assets, e.g. banks and insurance companies.
Be Aware
Some businesses have very light assets, such as software companies or insurance agencies. The PB Ratio does not work well for these companies. Some companies even have negative equity, so the PB Ratio cannot be applied to them.
LuxNet PB Ratio Related Terms
LuxNet PB Ratio Historical Data
* Premium members only.
The historical data trend for LuxNet's 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.
For the Semiconductors subindustry, LuxNet's PB Ratio, along with its competitors' market caps and 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.
LuxNet PB Ratio vs Semiconductors Industry
For the Semiconductors industry and Technology sector, LuxNet's PB Ratio distribution charts can be found below:
* The bar in red indicates where LuxNet's PB Ratio falls into.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. It is a ratio widely used to value stocks.
LuxNet's PB Ratio for today is calculated as follows:
* 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.
It can also be calculated from the numbers for the whole company:
A closely related ratio is called Price-to-Tangible-Book. The difference between Price-to-Tangible-Book and PB Ratio is that book value other than intangibles are used in the calculation.
LuxNet (ROCO:4979) has a PB Ratio of 13.87 as of Jul. 16, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on LuxNet and its competitors. This is 498% above median its historical median of 2.32. Over the past decade, LuxNet's PB Ratio has ranged from 1.05 to 23.36. According to the industry distribution chart, LuxNet ranks #908 out of 998 companies in the Semiconductors industry, placing it in the top 91%.
Is LuxNet's PB Ratio too high?
LuxNet's current PB Ratio of 13.87 is 498% above median its 10-year median of 2.32. Over the past 10 years, this metric has ranged from a low of 1.05 to a high of 23.36. The Semiconductors industry median PB Ratio is 3.46. LuxNet's value of 13.87 is 301.4% above this industry median. Based on the distribution chart, LuxNet ranks #908 out of 998 companies in the Semiconductors industry, which is in the bottom quartile relative to peers. Overall, LuxNet has a GF Score™ of 61/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does LuxNet's PB Ratio compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, LuxNet ranks #908 out of 998 companies for PB Ratio. This places LuxNet in the lower half of its industry. The industry median PB Ratio is 3.46. LuxNet's value of 13.87 is 301.4% above this benchmark. Historically, LuxNet's own PB Ratio has ranged from 1.05 to 23.36 over the past decade. While the company's 10-year median is 2.32 vs. the industry median of 3.46, LuxNet 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 PB Ratio for a Semiconductors company?
The median PB Ratio among Semiconductors companies is 3.46, based on 998 companies in the industry. Companies in the top quartile (top 25%) have a PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. LuxNet's current PB Ratio of 13.87 is 301.4% 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 PB Ratio mean?
A high PB Ratio can signal that a stock is expensive relative to its fundamentals. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on LuxNet and its competitors. For the Semiconductors industry, the median PB Ratio is 3.46 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. LuxNet's current PB Ratio is 13.87, which is 498% above median its own 10-year median of 2.32. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is LuxNet stock overvalued right now?
Based on GuruFocus' analysis, LuxNet (ROCO:4979) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$261.95, compared to a current price of NT$392.00 — trading 49.6% above its estimated fair value. The current PB Ratio is 13.87, which is 498% above median its 10-year median of 2.32 and 301.4% above the Semiconductors industry median of 3.46. LuxNet's overall GF Score™ is 61/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PB Ratio calculated?
PB Ratio is calculated from a company's financial statements. For LuxNet (ROCO:4979), the current PB Ratio is 13.87 as of Jul. 16, 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 LuxNet (ROCO:4979) Overvalued in 2026?
Based on GuruFocus' analysis, LuxNet stock appears to be overvalued.
The current stock price of NT$392.00 is trading 49.6% above its estimated GF Value™ of NT$261.95.
GuruFocus considers LuxNet to be Significantly Overvalued.
Key valuation signals for ROCO:4979:
PB Ratio: 13.87 (498% above median its 10-year median of 2.32)
GF Value™: NT$261.95 vs. price of NT$392.00 (49.6% above fair value)
Industry Position: 301.4% above the Semiconductors median (#908 of 998)
No single metric tells the full story. See the ROCO:4979 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
LuxNet Corp is engaged in the manufacturing, processing and sale of electronic components and active components for optical communication and the retail sale of electronic materials. Its products include CHIP, TO-CAN and OPTICAL SUB-ASSEMBLY, and its main product is active components for optical communication and modules. It also provides OEM services including Contract Manufacturing Service, Module Manufacturing Service and Optical Engine Manufacturing Service. The Group's revenues are mainly from active components for optical communication and are recognized when control of the goods is transferred to the customer. It operates in Taiwan, China, North America and other regions, with North America generating maximum revenue.
61GF Score
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