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.
Ta-Yuan Cogeneration CoROCO:8931 79 PB Ratio is 2.56 as of Jul. 17, 2026, which is 35% above its 10-year median of 1.90. GuruFocus rates ROCO:8931 with a GF Score™ of 79/100 and a GF Value™ of NT$47.22 (Modestly Undervalued). The stock has 8 warning signs investors should review. Among 501 Utilities - Regulated companies, Ta-Yuan Cogeneration Co ranks worse than 82.44% on this metric.
Ta-Yuan Cogeneration Co Ltd stock PB Ratio (=2.63) is close to 2-year low of 2.39.
The historical rank and industry rank for Ta-Yuan Cogeneration Co's PB Ratio or its related term are showing as below:
ROCO:8931'
s PB Ratio Range Over the Past 10 Years
Min: 1.33 Med: 1.9 Max: 4.2
Current: 2.55
During the past 13 years, Ta-Yuan Cogeneration Co's highest PB Ratio was 4.20. The lowest was 1.33. And the median was 1.90.
ROCO:8931's PB Ratio is ranked worse than 82.44% of 501
companies
in the Utilities - Regulated industry
Industry Median: 1.44
vs ROCO:8931: 2.55
During the past 12 months, Ta-Yuan Cogeneration Co's average Book Value Per Share Growth Rate was -1.80% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was -2.40% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 0.30% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was 2.80% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Ta-Yuan Cogeneration Co was 6.10% per year. The lowest was -2.40% per year. And the median was 2.65% per year.
Back to Basics: PB Ratio
Ta-Yuan Cogeneration Co (ROCO:8931) PB Ratio Explanation
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.
* 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 Utilities - Regulated Electric subindustry, Ta-Yuan Cogeneration Co'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.
Ta-Yuan Cogeneration Co PB Ratio vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, Ta-Yuan Cogeneration Co's PB Ratio distribution charts can be found below:
* The bar in red indicates where Ta-Yuan Cogeneration Co'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.
* 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.
Ta-Yuan Cogeneration Co (ROCO:8931) has a PB Ratio of 2.56 as of Jul. 17, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Ta-Yuan Cogeneration Co and its competitors. This is 35% above median its historical median of 1.90. Over the past decade, Ta-Yuan Cogeneration Co's PB Ratio has ranged from 1.33 to 4.20. According to the industry distribution chart, Ta-Yuan Cogeneration Co ranks #413 out of 501 companies in the Utilities - Regulated industry, placing it in the top 82.4%.
Is Ta-Yuan Cogeneration Co's PB Ratio too high?
Ta-Yuan Cogeneration Co's current PB Ratio of 2.56 is 35% above median its 10-year median of 1.90. Over the past 10 years, this metric has ranged from a low of 1.33 to a high of 4.20. The Utilities - Regulated industry median PB Ratio is 1.44. Ta-Yuan Cogeneration Co's value of 2.56 is 77.8% above this industry median. Based on the distribution chart, Ta-Yuan Cogeneration Co ranks #413 out of 501 companies in the Utilities - Regulated industry, which is in the bottom quartile relative to peers. Overall, Ta-Yuan Cogeneration Co has a GF Score™ of 79/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Ta-Yuan Cogeneration Co's PB Ratio compare to NEE and SO?
According to the Utilities - Regulated industry distribution chart, Ta-Yuan Cogeneration Co ranks #413 out of 501 companies for PB Ratio. This places Ta-Yuan Cogeneration Co in the lower half of its industry. The industry median PB Ratio is 1.44. Ta-Yuan Cogeneration Co's value of 2.56 is 77.8% above this benchmark. Historically, Ta-Yuan Cogeneration Co's own PB Ratio has ranged from 1.33 to 4.20 over the past decade. While the company's 10-year median is 1.90 vs. the industry median of 1.44, Ta-Yuan Cogeneration Co 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 an Utilities - Regulated company?
The median PB Ratio among Utilities - Regulated companies is 1.44, based on 501 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. Ta-Yuan Cogeneration Co's current PB Ratio of 2.56 is 77.8% 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 Ta-Yuan Cogeneration Co and its competitors. For the Utilities - Regulated industry, the median PB Ratio is 1.44 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Ta-Yuan Cogeneration Co's current PB Ratio is 2.56, which is 35% above median its own 10-year median of 1.90. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Ta-Yuan Cogeneration Co stock overvalued right now?
Based on GuruFocus' analysis, Ta-Yuan Cogeneration Co (ROCO:8931) is currently considered Modestly Undervalued. The stock's GF Value™ is NT$47.22, compared to a current price of NT$42.35 — trading 10.3% below its estimated fair value. The current PB Ratio is 2.56, which is 35% above median its 10-year median of 1.90 and 77.8% above the Utilities - Regulated industry median of 1.44. Ta-Yuan Cogeneration Co's overall GF Score™ is 79/100 with 8 warning signs 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 Ta-Yuan Cogeneration Co (ROCO:8931), the current PB Ratio is 2.56 as of Jul. 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 Ta-Yuan Cogeneration Co (ROCO:8931) Overvalued in 2026?
Based on GuruFocus' analysis, Ta-Yuan Cogeneration Co stock appears to be undervalued.
The current stock price of NT$42.35 is trading 10.3% below its estimated GF Value™ of NT$47.22.
GuruFocus considers Ta-Yuan Cogeneration Co to be Modestly Undervalued.
Key valuation signals for ROCO:8931:
PB Ratio: 2.56 (35% above median its 10-year median of 1.90)
GF Value™: NT$47.22 vs. price of NT$42.35 (10.3% below fair value)
Industry Position: 77.8% above the Utilities - Regulated median (#413 of 501)
No single metric tells the full story. See the ROCO:8931 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Ta-Yuan Cogeneration Co Ltd engages mainly in operating the cogeneration business, operating and repairing equipment, processing waste disposal, managing incinerators, and processing refuse-derived fuel. It is involved in the operation, management, and maintenance of cogeneration plants, as well as waste disposal and incinerator management. Through the development of cogeneration, the company focuses on supplying power to industrial areas and balancing peak and off-peak electricity demand. The company's reportable segments are: Plant of Cogeneration, which generates the maximum revenue, and Plant of Renewable Energy. Geographically, it operates only in Taiwan.
79GF Score
Get the complete analysis for ROCO:8931
PB 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
ROCO:8931 has been successfully added to your 
