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.
Keystone MicrotechROCO:6683 -4.91%79 Cyclically Adjusted PB Ratio is 17.59 as of Aug. 18, 2026, which is 188% above its 10-year median of 6.11. GuruFocus rates ROCO:6683 with a GF Score™ of 79/100 and a GF Value™ of NT$533.59 (Significantly Overvalued). The stock has 2 warning signs investors should review. Among 728 Semiconductors companies, Keystone Microtech ranks worse than 91.48% on this metric.
The historical rank and industry rank for Keystone Microtech's Cyclically Adjusted PB Ratio or its related term are showing as below:
ROCO:6683'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 4.97 Med: 6.11 Max: 19.34
Current: 18.5
During the past 12 years, Keystone Microtech's highest Cyclically Adjusted PB Ratio was 19.34. The lowest was 4.97. And the median was 6.11.
ROCO:6683's Cyclically Adjusted PB Ratio is ranked worse than 91.48% of 728
companies
in the Semiconductors industry
Industry Median: 3.355
vs ROCO:6683: 18.50
The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.
Keystone Microtech's adjusted book value per share data of for the fiscal year that ended in Dec25 was NT$98.806. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is NT$71.62 for the trailing ten years ended in Dec25.
Shiller PE for Stocks: The True Measure of Stock Valuation
Keystone Microtech (ROCO:6683) Cyclically Adjusted PB Ratio Explanation
Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.
Keystone Microtech Cyclically Adjusted PB Ratio Related Terms
Keystone Microtech Cyclically Adjusted PB Ratio Historical Data
* Premium members only.
The historical data trend for Keystone Microtech's Cyclically Adjusted 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.
Keystone Microtech Cyclically Adjusted PB Ratio Chart
ROCO:6683 vs AMAT, LRCX, KLAC: Cyclically Adjusted PB Ratio Comparison
For the Semiconductor Equipment & Materials subindustry, Keystone Microtech's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted 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.
Keystone Microtech Cyclically Adjusted PB Ratio vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Keystone Microtech's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where Keystone Microtech's Cyclically Adjusted PB Ratio falls into.
Keystone Microtech Cyclically Adjusted PB Ratio Calculation
Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.
Keystone Microtech's Cyclically Adjusted PB Ratio for today is calculated as
* 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.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
What does a Cyclically Adjusted PB Ratio of 17.59 mean?
Keystone Microtech (ROCO:6683) has a Cyclically Adjusted PB Ratio of 17.59 as of Aug. 18, 2026. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Keystone Microtech and its competitors. This is 188% above median its historical median of 6.11. Over the past decade, Keystone Microtech's Cyclically Adjusted PB Ratio has ranged from 4.97 to 19.34. According to the industry distribution chart, Keystone Microtech ranks #666 out of 728 companies in the Semiconductors industry, placing it in the top 91.5%.
Is Keystone Microtech's Cyclically Adjusted PB Ratio too high?
Keystone Microtech's current Cyclically Adjusted PB Ratio of 17.59 is 188% above median its 10-year median of 6.11. Over the past 10 years, this metric has ranged from a low of 4.97 to a high of 19.34. The Semiconductors industry median Cyclically Adjusted PB Ratio is 3.36. Keystone Microtech's value of 17.59 is 424.3% above this industry median. Based on the distribution chart, Keystone Microtech ranks #666 out of 728 companies in the Semiconductors industry, which is in the bottom quartile relative to peers. Overall, Keystone Microtech has a GF Score™ of 79/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Keystone Microtech's Cyclically Adjusted PB Ratio compare to AMAT and LRCX?
According to the Semiconductors industry distribution chart, Keystone Microtech ranks #666 out of 728 companies for Cyclically Adjusted PB Ratio. This places Keystone Microtech in the lower half of its industry. The industry median Cyclically Adjusted PB Ratio is 3.36. Keystone Microtech's value of 17.59 is 424.3% above this benchmark. Historically, Keystone Microtech's own Cyclically Adjusted PB Ratio has ranged from 4.97 to 19.34 over the past decade. While the company's 10-year median is 6.11 vs. the industry median of 3.36, Keystone Microtech 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 Cyclically Adjusted PB Ratio for a Semiconductors company?
The median Cyclically Adjusted PB Ratio among Semiconductors companies is 3.36, based on 728 companies in the industry. Companies in the top quartile (top 25%) have a Cyclically Adjusted PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, Cyclically Adjusted PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Keystone Microtech's current Cyclically Adjusted PB Ratio of 17.59 is 424.3% 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 Cyclically Adjusted PB Ratio mean?
A high Cyclically Adjusted PB Ratio can signal that a stock is expensive relative to its fundamentals. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Keystone Microtech and its competitors. For the Semiconductors industry, the median Cyclically Adjusted PB Ratio is 3.36 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Keystone Microtech's current Cyclically Adjusted PB Ratio is 17.59, which is 188% above median its own 10-year median of 6.11. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Keystone Microtech stock overvalued right now?
Based on GuruFocus' analysis, Keystone Microtech (ROCO:6683) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$533.59, compared to a current price of NT$1,260.00 — trading 136.1% above its estimated fair value. The current Cyclically Adjusted PB Ratio is 17.59, which is 188% above median its 10-year median of 6.11 and 424.3% above the Semiconductors industry median of 3.36. Keystone Microtech's overall GF Score™ is 79/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted PB Ratio calculated?
Cyclically Adjusted PB Ratio is calculated from a company's financial statements. For Keystone Microtech (ROCO:6683), the current Cyclically Adjusted PB Ratio is 17.59 as of Aug. 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 Keystone Microtech (ROCO:6683) Overvalued in 2026?
Based on GuruFocus' analysis, Keystone Microtech stock appears to be overvalued.
The current stock price of NT$1,260.00 is trading 136.1% above its estimated GF Value™ of NT$533.59.
GuruFocus considers Keystone Microtech to be Significantly Overvalued.
Key valuation signals for ROCO:6683:
Cyclically Adjusted PB Ratio: 17.59 (188% above median its 10-year median of 6.11)
GF Value™: NT$533.59 vs. price of NT$1,260.00 (136.1% above fair value)
Industry Position: 424.3% above the Semiconductors median (#666 of 728)
No single metric tells the full story. See the ROCO:6683 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Keystone Microtech Corp operates as a semiconductor device manufacturing company. The company is mainly an important operating department engaged in the manufacture and sale of various circuit testing solutions for semiconductors, including IC front-end test solutions (probe cards and substrates), IC back-end test solutions (load boards and burn-in boards), and other related testing boards. Geographically, it operates in Taiwan and other regions, out of which the majority of its revenue is derived from Taiwan.
79GF Score
Get the complete analysis for ROCO:6683
Cyclically Adjusted 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:6683 has been successfully added to your 
