Sun Brothers Development Co (ROCO:3489) OCF Margin %: -17.09% (As of Dec. 2025)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
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.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
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.

ROCO:3489 Sun Brothers Development Co Ltd ROCO:3489
52 GF Score
Price NT$19.85
GF Value NT$9.16
Valuation Significantly Overvalued
! 9 Warning Signs
View Full Analysis

What is Sun Brothers Development Co OCF Margin %?

Sun Brothers Development Co ROCO:3489 -2.93% 52 OCF Margin % is -17.09% as of Dec. 2025. GuruFocus rates ROCO:3489 with a GF Score™ of 52/100 and a GF Value™ of NT$9.16 (Significantly Overvalued). The stock has 9 warning signs investors should review. Among 1,755 Real Estate companies, Sun Brothers Development Co ranks worse than 88.72% on this metric.

OCF Margin % is calculated as Cash Flow from Operations divided by its Revenue. Sun Brothers Development Co's Cash Flow from Operations for the three months ended in Dec. 2025 was NT$-42.2 Mil. Sun Brothers Development Co's Revenue for the three months ended in Dec. 2025 was NT$247.2 Mil. Therefore, Sun Brothers Development Co's OCF Margin % for the quarter that ended in Dec. 2025 was -17.09%.

As of today, Sun Brothers Development Co's current OCF Yield % is -17.54%.

The historical rank and industry rank for Sun Brothers Development Co's OCF Margin % or its related term are showing as below:

ROCO:3489' s OCF Margin % Range Over the Past 10 Years
Min: -77.76   Med: -16.82   Max: 44.53
Current: -53.39


During the past 13 years, the highest OCF Margin % of Sun Brothers Development Co was 44.53%. The lowest was -77.76%. And the median was -16.82%.

ROCO:3489's OCF Margin % is ranked worse than
88.72% of 1755 companies
in the Real Estate industry
Industry Median: 10.92 vs ROCO:3489: -53.39


Sun Brothers Development Co OCF Margin % Related Terms


Sun Brothers Development Co OCF Margin % Historical Data

* Premium members only.

The historical data trend for Sun Brothers Development Co's OCF Margin % 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.

Sun Brothers Development Co OCF Margin % Chart

Sun Brothers Development Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
OCF Margin %
Get a 7-Day Free Trial Premium Member Only Premium Member Only 15.15 -23.34 5.30 44.53 -53.39

Sun Brothers Development Co Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
OCF Margin % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 59.52 -42.56 -80.15 -84.81 -17.09

Sun Brothers Development Co OCF Margin % Competitor Comparison

For the Real Estate - Development subindustry, Sun Brothers Development Co's OCF Margin %, along with its competitors' market caps and OCF Margin % 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 OCF Margin % vs Real Estate Industry

For the Real Estate industry and Real Estate sector, Sun Brothers Development Co's OCF Margin % distribution charts can be found below:

* The bar in red indicates where Sun Brothers Development Co's OCF Margin % falls into.


ROCO:3489
52GF Score
Sun Brothers Development Co Ltd ROCO:3489
OCF Margin % is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Sun Brothers Development Co OCF Margin % Calculation

OCF Margin % is the ratio of Cash Flow from Operations divided by net sales or Revenue, usually presented in percent.

Sun Brothers Development Co's OCF Margin for the fiscal year that ended in Dec. 2025 is calculated as

OCF Margin=Cash Flow from Operations (A: Dec. 2025 )/Revenue (A: Dec. 2025 )
=-383.936/719.065
=-53.39 %

Sun Brothers Development Co's OCF Margin for the quarter that ended in Dec. 2025 is calculated as

OCF Margin=Cash Flow from Operations (Q: Dec. 2025 )/Revenue (Q: Dec. 2025 )
=-42.247/247.229
=-17.09 %

* 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.

Frequently Asked Questions Learn more about OCF Margin % →
What does a OCF Margin % of -17.09% mean?
Sun Brothers Development Co (ROCO:3489) has a OCF Margin % of -17.09% as of Dec. 2025. OCF Margin is the ratio of Cash Flow from Operations to Total Revenue. View historical data on Sun Brothers Development Co and its competitors. According to the industry distribution chart, Sun Brothers Development Co ranks #1557 out of 1755 companies in the Real Estate industry, placing it in the top 88.7%.
Is Sun Brothers Development Co's OCF Margin % too high?
Sun Brothers Development Co's current OCF Margin % is -17.09%. Based on the distribution chart, Sun Brothers Development Co ranks #1557 out of 1755 companies in the Real Estate industry, which is in the bottom quartile relative to peers. 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 OCF Margin % compare to competitors?
According to the Real Estate industry distribution chart, Sun Brothers Development Co ranks #1557 out of 1755 companies for OCF Margin %. This places Sun Brothers Development Co in the lower half of its industry. The industry median OCF Margin % is 10.92. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good OCF Margin % for a Real Estate company?
The median OCF Margin % among Real Estate companies is 10.92, based on 1,755 companies in the industry. Companies in the top quartile (top 25%) have a OCF Margin % significantly above this median, while those in the bottom quartile fall well below. However, OCF Margin % 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 OCF Margin % mean?
A high OCF Margin % can signal that a stock is expensive relative to its fundamentals. OCF Margin is the ratio of Cash Flow from Operations to Total Revenue. View historical data on Sun Brothers Development Co and its competitors. For the Real Estate industry, the median OCF Margin % is 10.92 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Sun Brothers Development Co's current OCF Margin % is -17.09%. 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$9.16, compared to a current price of NT$19.85 — trading 116.7% above its estimated fair value. The current OCF Margin % is -17.09%. 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 OCF Margin % calculated?
OCF Margin % is calculated from a company's financial statements. For Sun Brothers Development Co (ROCO:3489), the current OCF Margin % is -17.09% as of Dec. 2025. 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$19.85 is trading 116.7% above its estimated GF Value™ of NT$9.16. GuruFocus considers Sun Brothers Development Co to be Significantly Overvalued.

Key valuation signals for ROCO:3489:

  • OCF Margin %: -17.09%
  • GF Value™: NT$9.16 vs. price of NT$19.85 (116.7% above fair value)
  • GF Score™: 52/100 with 9 warning signs

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 Business Description

Address No. 50, Minquan Road, Luzhu District, Taoyuan, TWN, 338018
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

OCF Margin % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

NT$19.85
Price
NT$9.16
GF Value