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.
Sun Brothers Development Co has the GF Score of 52, which implies that the company
might have
Poor future performance 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 Sun Brothers Development Co
might have
Poor future performance potential.
Please click GF Score to see more details on the GF Score's 5 Key Aspects of Analysis.
Sun Brothers Development Co (ROCO:3489) 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.
Sun Brothers Development Co GF Score Related Terms
Sun Brothers Development Co GF Score Competitor Comparison
For the Real Estate - Development subindustry, Sun Brothers Development Co'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.
Sun Brothers Development Co GF Score vs Real Estate Industry
For the Real Estate industry and Real Estate sector, Sun Brothers Development Co's GF Score distribution charts can be found below:
* The bar in red indicates where Sun Brothers Development Co's GF Score falls into.
Sun Brothers Development Co (ROCO:3489) has a GF Score of 52 as of Jul. 16, 2026. GF Score is a stock performance ranking system developed by GuruFocus using five aspects of valuation. View historical data on Sun Brothers Development Co and its competitors. This is 16% below median its historical median of 62.00. Over the past decade, Sun Brothers Development Co's GF Score has ranged from 27.00 to 82.00.
Is Sun Brothers Development Co's GF Score too high?
Sun Brothers Development Co's current GF Score of 52 is 16% below median its 10-year median of 62.00. Over the past 10 years, this metric has ranged from a low of 27.00 to a high of 82.00. Overall, Sun Brothers Development Co has a GF Score™ of 52/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Sun Brothers Development Co's GF Score compare to competitors?
Sun Brothers Development Co's GF Score of 52 can be compared against companies in the Real Estate industry. Historically, Sun Brothers Development Co's own GF Score has ranged from 27.00 to 82.00 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 Real Estate company?
A good GF Score depends on the Real Estate 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 Sun Brothers Development Co and its competitors. Sun Brothers Development Co's current GF Score is 52, which is 16% below median its own 10-year median of 62.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Sun Brothers Development Co stock overvalued right now?
Based on GuruFocus' analysis, Sun Brothers Development Co (ROCO:3489) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$9.15, compared to a current price of NT$19.70 — trading 115.3% above its estimated fair value. The current GF Score is 52, which is 16% below median its 10-year median of 62.00. Sun Brothers Development Co's overall GF Score™ is 52/100 with 9 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 Sun Brothers Development Co (ROCO:3489), the current GF Score is 52 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 Sun Brothers Development Co (ROCO:3489) Overvalued in 2026?
Based on GuruFocus' analysis, Sun Brothers Development Co stock appears to be overvalued.
The current stock price of NT$19.70 is trading 115.3% above its estimated GF Value™ of NT$9.15.
GuruFocus considers Sun Brothers Development Co to be Significantly Overvalued.
Key valuation signals for ROCO:3489:
GF Score: 52 (16% below median its 10-year median of 62.00)
GF Value™: NT$9.15 vs. price of NT$19.70 (115.3% above fair value)
No single metric tells the full story. See the ROCO:3489 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Sun Brothers Development Co Ltd is engaged in wholesale of building materials, developing, constructing, leasing and selling for residential, commercial or industrial buildings and others. It is also involved in the development and construction of collective housing and public works contract construction. The company's segments are: Real property section, and Construction section. It derives revenue from Construction segment.
52GF Score
Get the complete analysis for ROCO:3489
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:3489 has been successfully added to your 
