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.
This valuation method assumes that the stock valuation will revert to its historical (10-Year) median in terms of PS Ratio. The reason we use PS Ratio instead of PE Ratio or PB Ratio is because PS Ratio is independent of profit margin, and can be applied to a broader range of situations.
The historical rank and industry rank for Keystone Microtech's Median PS Value or its related term are showing as below:
ROCO:6683's Price-to-Median-PS-Value is not ranked *
in the Semiconductors industry.
Industry Median: 1.49 * Ranked among companies with meaningful Price-to-Median-PS-Value only.
Keystone Microtech (ROCO:6683) Median PS Value Explanation
This valuation method assumes that the stock valuation will revert to its historical (10-Year) mean in terms of PS Ratio. The reason we use PS Ratio instead of PE Ratio or PB Ratio
is because PS Ratio is independent of profit margin, and can be applied to a broader range of situations.
It also assumes that over time the profit margin is constant. If a company increases its profit margin to a sustainable level, this value might under-estimate its value. If it has permanent declined profit margins, this may over-estimate the company's value.
Keystone Microtech's Price to Median PS Value for today is calculated as
Price to Median PS Value
=
Share Price
/
Median PS Value
=
1350.00
/
0.00
=
* 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 Median PS Value Related Terms
Keystone Microtech Median PS Value Historical Data
* Premium members only.
The historical data trend for Keystone Microtech's Median PS Value 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.
ROCO:6683 vs AMAT, LRCX, KLAC: Median PS Value Comparison
For the Semiconductor Equipment & Materials subindustry, Keystone Microtech's Price-to-Median-PS-Value, along with its competitors' market caps and Price-to-Median-PS-Value 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 Price-to-Median-PS-Value vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Keystone Microtech's Price-to-Median-PS-Value distribution charts can be found below:
* The bar in red indicates where Keystone Microtech's Price-to-Median-PS-Value falls into.
10-Year Median PS Ratio is 0.
Keystone Microtech's Revenue per Share for the trailing twelve months (TTM) ended in Dec. 2025 adds up the quarterly data reported by the company within the most recent 12 months, which was NT$77.498.
* 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 (ROCO:6683) has a Median PS Value of NT$0.00 as of Jul. 16, 2026. Median price-sales value is the stock value based on a company's 10-year median price-sales ratio, View historical data on Keystone Microtech and its competitors. According to the industry distribution chart, Keystone Microtech ranks #999999 out of 538 companies in the Semiconductors industry.
Is Keystone Microtech's Median PS Value too high?
Keystone Microtech's current Median PS Value is NT$0.00. Based on the distribution chart, Keystone Microtech ranks #999999 out of 538 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 Median PS Value compare to AMAT and LRCX?
According to the Semiconductors industry distribution chart, Keystone Microtech ranks #999999 out of 538 companies for Median PS Value. This places Keystone Microtech in the lower half of its industry. The industry median Median PS Value is 1.49. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Median PS Value for a Semiconductors company?
The median Median PS Value among Semiconductors companies is 1.49, based on 538 companies in the industry. Companies in the top quartile (top 25%) have a Median PS Value significantly above this median, while those in the bottom quartile fall well below. However, Median PS Value 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 Median PS Value mean?
A high Median PS Value can signal that a stock is expensive relative to its fundamentals. Median price-sales value is the stock value based on a company's 10-year median price-sales ratio, View historical data on Keystone Microtech and its competitors. For the Semiconductors industry, the median Median PS Value is 1.49 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Keystone Microtech's current Median PS Value is NT$0.00. 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$486.03, compared to a current price of NT$1,350.00 — trading 177.8% above its estimated fair value. The current Median PS Value is NT$0.00. 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 Median PS Value calculated?
Median PS Value is calculated from a company's financial statements. For Keystone Microtech (ROCO:6683), the current Median PS Value is NT$0.00 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 Keystone Microtech (ROCO:6683) Overvalued in 2026?
Based on GuruFocus' analysis, Keystone Microtech stock appears to be overvalued.
The current stock price of NT$1,350.00 is trading 177.8% above its estimated GF Value™ of NT$486.03.
GuruFocus considers Keystone Microtech to be Significantly Overvalued.
Key valuation signals for ROCO:6683:
Median PS Value: NT$0.00
GF Value™: NT$486.03 vs. price of NT$1,350.00 (177.8% above fair value)
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
Median PS Value 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 
