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.
Top Union Electronics has the GF Score of 91, which implies that the company
might have
Highest outperformance potential.
The GF Score is a stock performance ranking system developed by GuruFocus using five aspects of valuation, which has been found to be closely correlated to the long-term performances of stocks by backtesting from 2006 to 2021. The stocks with a higher GF Score generally generate higher returns than those with lower GF Scores. Therefore, when picking stocks, investors should invest in companies with high GF Scores. The GF Score ranges from 0 to 100, with 100 as the highest rank.
GF Score takes following five key aspects into consideration:
Each one of these components is ranked and the ranks also have positive correlation with the long term performances of stocks. The GF score is calculated using the five key aspects of analysis. Through backtesting, we know that each of these key aspects has a different impact on the stock price performance. Thus, they are weighted differently when calculating the total score. The Profitability Rank and the Growth Rank are weighted fully, while other parameters have less weight.
Based on research and backtesting result, GuruFocus believes Top Union Electronics
might have
Highest outperformance potential.
Please click GF Score to see more details on the GF Score's 5 Key Aspects of Analysis.
Top Union Electronics (ROCO:6266) GF Score Explanation
Based on the historical long-term performances among five valuation aspects, the GF Score is found to be closely correlated to the long-term performances of stocks. It ranges from 0 to 100, with 100 as the highest. GuruFocus divided GF Score into following 5 categories:
GF Score
Performance Potential and All-in-One Screener Examples (1)
(1) These are some simple examples. You can access our GF Score filter under All-in-One Screener’s Fundamental tab.
Top Union Electronics GF Score Related Terms
ROCO:6266 vs AMAT, LRCX, KLAC: GF Score Comparison
For the Semiconductor Equipment & Materials subindustry, Top Union Electronics's GF Score, along with its competitors' market caps and GF Score 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.
Top Union Electronics GF Score vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Top Union Electronics's GF Score distribution charts can be found below:
* The bar in red indicates where Top Union Electronics's GF Score falls into.
Top Union Electronics (ROCO:6266) has a GF Score of 91 as of Jul. 26, 2026. GF Score is a stock performance ranking system developed by GuruFocus using five aspects of valuation. View historical data on Top Union Electronics and its competitors. This is near median its historical median of 90.00. Over the past decade, Top Union Electronics' GF Score has ranged from 35.00 to 97.00.
Is Top Union Electronics' GF Score too high?
Top Union Electronics' current GF Score of 91 is near median its 10-year median of 90.00. Over the past 10 years, this metric has ranged from a low of 35.00 to a high of 97.00. Overall, Top Union Electronics has a GF Score™ of 91/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Top Union Electronics' GF Score compare to AMAT and LRCX?
Top Union Electronics' GF Score of 91 can be compared against companies in the Semiconductors industry. Historically, Top Union Electronics' own GF Score has ranged from 35.00 to 97.00 over the past decade. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good GF Score for a Semiconductors company?
A good GF Score depends on the Semiconductors industry context. However, GF Score 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 GF Score mean?
A high GF Score can signal that a stock is expensive relative to its fundamentals. GF Score is a stock performance ranking system developed by GuruFocus using five aspects of valuation. View historical data on Top Union Electronics and its competitors. Top Union Electronics's current GF Score is 91, which is near median its own 10-year median of 90.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Top Union Electronics stock overvalued right now?
Based on GuruFocus' analysis, Top Union Electronics (ROCO:6266) is currently considered Modestly Undervalued. The stock's GF Value™ is NT$30.96, compared to a current price of NT$24.85 — trading 19.7% below its estimated fair value. The current GF Score is 91, which is near median its 10-year median of 90.00. Top Union Electronics' overall GF Score™ is 91/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is GF Score calculated?
GF Score is calculated from a company's financial statements. For Top Union Electronics (ROCO:6266), the current GF Score is 91 as of Jul. 26, 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 Top Union Electronics (ROCO:6266) Overvalued in 2026?
Based on GuruFocus' analysis, Top Union Electronics stock appears to be undervalued.
The current stock price of NT$24.85 is trading 19.7% below its estimated GF Value™ of NT$30.96.
GuruFocus considers Top Union Electronics to be Modestly Undervalued.
Key valuation signals for ROCO:6266:
GF Score: 91 (near median its 10-year median of 90.00)
GF Value™: NT$30.96 vs. price of NT$24.85 (19.7% below fair value)
No single metric tells the full story. See the ROCO:6266 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Top Union Electronics Corp is principally engaged in the design, manufacture, and technical support of electronic products and communication equipment, as well as providing surface mount technology (SMT) services, processing, and international trade business. The company operates in America, Taiwan, and China, of which it derives maximum revenue.
91GF Score
Get the complete analysis for ROCO:6266
GF Score 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:6266 has been successfully added to your 
