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.
Nan Ya PlasticsTPE:1303 -9.95%56 PB Ratio is 4.44 as of Jul. 18, 2026, which is 178% above its 10-year median of 1.60. GuruFocus rates TPE:1303 with a GF Score™ of 56/100 and a GF Value™ of NT$62.58 (Significantly Overvalued). The stock has 9 warning signs investors should review. Among 1,576 Chemicals companies, Nan Ya Plastics ranks worse than 87.56% 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 (2026-07-18), Nan Ya Plastics's share price is NT$199.00. Nan Ya Plastics's Book Value per Share for the quarter that ended in Dec. 2025 was NT$44.85. Hence, Nan Ya Plastics's PB Ratio of today is 4.44.
Warning Sign:
Nan Ya Plastics Corp stock PB Ratio (=4.05) is close to 10-year high of 4.39.
The historical rank and industry rank for Nan Ya Plastics's PB Ratio or its related term are showing as below:
TPE:1303'
s PB Ratio Range Over the Past 10 Years
Min: 0.62 Med: 1.6 Max: 5.07
Current: 4.44
During the past 13 years, Nan Ya Plastics's highest PB Ratio was 5.07. The lowest was 0.62. And the median was 1.60.
TPE:1303's PB Ratio is ranked worse than 87.56% of 1576
companies
in the Chemicals industry
Industry Median: 1.67
vs TPE:1303: 4.44
During the past 12 months, Nan Ya Plastics's average Book Value Per Share Growth Rate was 2.60% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was -1.80% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was -1.20% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was 0.70% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Nan Ya Plastics was 10.30% per year. The lowest was -5.80% per year. And the median was 1.50% 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.
Nan Ya Plastics PB Ratio Related Terms
Nan Ya Plastics PB Ratio Historical Data
* Premium members only.
The historical data trend for Nan Ya Plastics'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 Specialty Chemicals subindustry, Nan Ya Plastics'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.
Nan Ya Plastics PB Ratio vs Chemicals Industry
For the Chemicals industry and Basic Materials sector, Nan Ya Plastics's PB Ratio distribution charts can be found below:
* The bar in red indicates where Nan Ya Plastics'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.
Nan Ya Plastics'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.
Nan Ya Plastics (TPE:1303) has a PB Ratio of 4.44 as of Jul. 18, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Nan Ya Plastics and its competitors. This is 178% above median its historical median of 1.60. Over the past decade, Nan Ya Plastics' PB Ratio has ranged from 0.62 to 5.07. According to the industry distribution chart, Nan Ya Plastics ranks #1380 out of 1576 companies in the Chemicals industry, placing it in the top 87.6%.
Is Nan Ya Plastics' PB Ratio too high?
Nan Ya Plastics' current PB Ratio of 4.44 is 178% above median its 10-year median of 1.60. Over the past 10 years, this metric has ranged from a low of 0.62 to a high of 5.07. The Chemicals industry median PB Ratio is 1.67. Nan Ya Plastics' value of 4.44 is 165.9% above this industry median. Based on the distribution chart, Nan Ya Plastics ranks #1380 out of 1576 companies in the Chemicals industry, which is in the bottom quartile relative to peers. Overall, Nan Ya Plastics has a GF Score™ of 56/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Nan Ya Plastics' PB Ratio compare to LIN and SHW?
According to the Chemicals industry distribution chart, Nan Ya Plastics ranks #1380 out of 1576 companies for PB Ratio. This places Nan Ya Plastics in the lower half of its industry. The industry median PB Ratio is 1.67. Nan Ya Plastics' value of 4.44 is 165.9% above this benchmark. Historically, Nan Ya Plastics' own PB Ratio has ranged from 0.62 to 5.07 over the past decade. While the company's 10-year median is 1.60 vs. the industry median of 1.67, Nan Ya Plastics 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 Chemicals company?
The median PB Ratio among Chemicals companies is 1.67, based on 1,576 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. Nan Ya Plastics's current PB Ratio of 4.44 is 165.9% 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 Nan Ya Plastics and its competitors. For the Chemicals industry, the median PB Ratio is 1.67 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Nan Ya Plastics's current PB Ratio is 4.44, which is 178% above median its own 10-year median of 1.60. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Nan Ya Plastics stock overvalued right now?
Based on GuruFocus' analysis, Nan Ya Plastics (TPE:1303) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$62.58, compared to a current price of NT$199.00 — trading 218% above its estimated fair value. The current PB Ratio is 4.44, which is 178% above median its 10-year median of 1.60 and 165.9% above the Chemicals industry median of 1.67. Nan Ya Plastics' overall GF Score™ is 56/100 with 9 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 Nan Ya Plastics (TPE:1303), the current PB Ratio is 4.44 as of Jul. 18, 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 Nan Ya Plastics (TPE:1303) Overvalued in 2026?
Based on GuruFocus' analysis, Nan Ya Plastics stock appears to be overvalued.
The current stock price of NT$199.00 is trading 218% above its estimated GF Value™ of NT$62.58.
GuruFocus considers Nan Ya Plastics to be Significantly Overvalued.
Key valuation signals for TPE:1303:
PB Ratio: 4.44 (178% above median its 10-year median of 1.60)
GF Value™: NT$62.58 vs. price of NT$199.00 (218% above fair value)
Industry Position: 165.9% above the Chemicals median (#1380 of 1576)
No single metric tells the full story. See the TPE:1303 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Nan Ya Plastics Corp engages in the manufacture and sale of plastic products, polyester fibers, petrochemical products, and electronic materials. It has gone through several capital increases and established many divisions. Currently, the Company has the following divisions: plastics, fiber, petrochemical, electronics, and engineering. Geographically, the company generates a majority of its revenue from China and the rest from Taiwan and other markets.
56GF Score
Get the complete analysis for TPE:1303
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
TPE:1303 has been successfully added to your 
