Sun Brothers Development Co (ROCO:3489) Cyclically Adjusted Book per Share: NT$17.76 (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$9.15
Valuation Significantly Overvalued
! 9 Warning Signs
View Full Analysis

What is Sun Brothers Development Co Cyclically Adjusted Book per Share?

Sun Brothers Development Co ROCO:3489 -2.93% 52 Cyclically Adjusted Book per Share is NT$17.76 as of Dec. 2025. GuruFocus rates ROCO:3489 with a GF Score™ of 52/100 and a GF Value™ of NT$9.15 (Significantly Overvalued). The stock has 9 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and 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.

Sun Brothers Development Co's adjusted book value per share for the three months ended in Dec. 2025 was NT$13.324. 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$17.76 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Sun Brothers Development Co's average Cyclically Adjusted Book Growth Rate was -0.40% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 1.10% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 3.60% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the Cyclically Adjusted Book Growth Rate using Cyclically Adjusted Book per Share data.

During the past 13 years, the highest 3-Year average Cyclically Adjusted Book Growth Rate of Sun Brothers Development Co was 6.10% per year. The lowest was 1.10% per year. And the median was 4.65% per year.

As of today (2026-07-15), Sun Brothers Development Co's current stock price is NT$19.85. Sun Brothers Development Co's Cyclically Adjusted Book per Share for the quarter that ended in Dec. 2025 was NT$17.76. Sun Brothers Development Co's Cyclically Adjusted PB Ratio of today is 1.12.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Sun Brothers Development Co was 2.12. The lowest was 0.56. And the median was 0.77.


Sun Brothers Development Co  (ROCO:3489) Cyclically Adjusted Book per Share Explanation

If a company grows much fast than inflation, Cyclically Adjusted Book per Share may underestimate the company's equity. Cyclically Adjusted PB Ratio can seem to be too high even the actual PB Ratio is low.

For the Cyclically Adjusted PB Ratio, the book value of the past 10 years are inflation-adjusted and averaged. The result is used for P/B calculation. Since it looks at the average over the last 10 years, the Cyclically Adjusted PB Ratio is also called CAPB Ratio.

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.

Sun Brothers Development Co's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=19.85/17.76
=1.12

* 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.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Sun Brothers Development Co was 2.12. The lowest was 0.56. And the median was 0.77.


Be Aware

Cyclically Adjusted PB Ratio works better for cyclical companies. It gives you a better idea on the company's real book value.


Sun Brothers Development Co Cyclically Adjusted Book per Share Related Terms


Sun Brothers Development Co Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Sun Brothers Development Co's Cyclically Adjusted Book per Share 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 Cyclically Adjusted Book per Share Chart

Sun Brothers Development Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 15.99 17.17 17.76 17.84 17.76

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
Cyclically Adjusted Book per Share 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 17.84 17.95 17.96 17.93 17.76

Sun Brothers Development Co Cyclically Adjusted Book per Share Competitor Comparison

For the Real Estate - Development subindustry, Sun Brothers Development Co'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.


Sun Brothers Development Co Cyclically Adjusted PB Ratio vs Real Estate Industry

For the Real Estate industry and Real Estate sector, Sun Brothers Development Co's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Sun Brothers Development Co's Cyclically Adjusted PB Ratio falls into.


ROCO:3489
52GF Score
Sun Brothers Development Co Ltd ROCO:3489
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Sun Brothers Development Co Cyclically Adjusted Book per Share Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and 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.

What is Cyclically Adjusted Book per Share? How do we calculate Cyclically Adjusted Book per Share?

Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the Cyclically Adjusted Book per Share of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the book value per share from 2001 through 2010.

We adjusted the 2001 book value per share data with the total inflation from 2001 through 2010 to the equivalent book value in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart's book value is $1 a share in 2001, then the 2001's equivalent book value in 2010 is $1.4 a share. If Wal-Mart's book value is $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 book value in 2010 is $1.35. So on and so forth, you get the equivalent book value per share of past 10 years. Then you add them together and divided the sum by the count to get Cyclically Adjusted Book per Share.

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.

For example, Sun Brothers Development Co's adjusted Book Value per Share data for the three months ended in Dec. 2025 was:

Adj_Book= Book Value per Share /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=13.324/324.0540*324.0540
=13.324

Current CPI (Dec. 2025) = 324.0540.

Sun Brothers Development Co Quarterly Data

Book Value per Share CPI Adj_Book
201603 13.543 238.132 18.430
201606 13.691 241.018 18.408
201609 14.709 241.428 19.743
201612 15.236 241.432 20.450
201703 15.108 243.801 20.081
201706 14.669 244.955 19.406
201709 14.729 246.819 19.338
201712 14.649 246.524 19.256
201803 14.781 249.554 19.194
201806 15.017 251.989 19.312
201809 15.116 252.439 19.404
201812 15.187 251.233 19.589
201903 15.212 254.202 19.392
201906 15.169 256.143 19.191
201909 15.300 256.759 19.310
201912 15.434 256.974 19.463
202003 15.539 258.115 19.509
202006 15.297 257.797 19.229
202009 15.515 260.280 19.316
202012 15.561 260.474 19.359
202103 15.725 264.877 19.238
202106 15.739 271.696 18.772
202109 15.773 274.310 18.633
202112 15.834 278.802 18.404
202203 15.746 287.504 17.748
202206 15.243 296.311 16.670
202209 15.225 296.808 16.623
202212 15.626 296.797 17.061
202303 15.551 301.836 16.696
202306 15.492 305.109 16.454
202309 15.434 307.789 16.250
202312 15.203 306.746 16.061
202403 15.120 312.332 15.687
202406 14.782 314.175 15.247
202409 14.634 315.301 15.040
202412 13.917 315.605 14.290
202503 13.874 319.799 14.059
202506 13.349 322.561 13.411
202509 13.285 324.800 13.254
202512 13.324 324.054 13.324

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

What does a Cyclically Adjusted Book per Share of NT$17.76 mean?
Sun Brothers Development Co (ROCO:3489) has a Cyclically Adjusted Book per Share of NT$17.76 as of Dec. 2025. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Sun Brothers Development Co and its competitors.
Is Sun Brothers Development Co's Cyclically Adjusted Book per Share too high?
Sun Brothers Development Co's current Cyclically Adjusted Book per Share is NT$17.76. 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 Cyclically Adjusted Book per Share compare to competitors?
Sun Brothers Development Co's Cyclically Adjusted Book per Share of NT$17.76 can be compared against companies in the Real Estate industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted Book per Share for a Real Estate company?
A good Cyclically Adjusted Book per Share depends on the Real Estate industry context. However, Cyclically Adjusted Book per Share 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 Cyclically Adjusted Book per Share mean?
A high Cyclically Adjusted Book per Share can signal that a stock is expensive relative to its fundamentals. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Sun Brothers Development Co and its competitors. Sun Brothers Development Co's current Cyclically Adjusted Book per Share is NT$17.76. 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$19.85 — trading 116.9% above its estimated fair value. The current Cyclically Adjusted Book per Share is NT$17.76. 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 Cyclically Adjusted Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For Sun Brothers Development Co (ROCO:3489), the current Cyclically Adjusted Book per Share is NT$17.76 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 116.9% 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:

  • Cyclically Adjusted Book per Share: NT$17.76
  • GF Value™: NT$9.15 vs. price of NT$19.85 (116.9% 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

Cyclically Adjusted Book per Share is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

NT$19.85
Price
NT$9.15
GF Value