Fulltech Fiber Glass (ROCO:1815) Cyclically Adjusted Book per Share: NT$18.35 (As of Dec. 2025)


ROCO:1815 Fulltech Fiber Glass Corp ROCO:1815
59 GF Score
Price NT$96.50
GF Value NT$35.94
Valuation Significantly Overvalued
! 1 Warning Sign
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What is Fulltech Fiber Glass Cyclically Adjusted Book per Share?

Fulltech Fiber Glass ROCO:1815 -3.02% 59 Cyclically Adjusted Book per Share is NT$18.35 as of Dec. 2025. GuruFocus rates ROCO:1815 with a GF Score™ of 59/100 and a GF Value™ of NT$35.94 (Significantly Overvalued). The stock has 1 warning sign 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.

Fulltech Fiber Glass's adjusted book value per share for the three months ended in Dec. 2025 was NT$21.709. 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$18.35 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Fulltech Fiber Glass's average Cyclically Adjusted Book Growth Rate was 0.70% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 0.50% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 1.90% 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 Fulltech Fiber Glass was 3.30% per year. The lowest was 0.50% per year. And the median was 2.35% per year.

As of today (2026-07-08), Fulltech Fiber Glass's current stock price is NT$96.50. Fulltech Fiber Glass's Cyclically Adjusted Book per Share for the quarter that ended in Dec. 2025 was NT$18.35. Fulltech Fiber Glass's Cyclically Adjusted PB Ratio of today is 5.26.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Fulltech Fiber Glass was 6.92. The lowest was 0.49. And the median was 0.87.


Fulltech Fiber Glass  (ROCO:1815) 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.

Fulltech Fiber Glass's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=96.50/18.35
=5.26

* 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 Fulltech Fiber Glass was 6.92. The lowest was 0.49. And the median was 0.87.


Be Aware

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


Fulltech Fiber Glass Cyclically Adjusted Book per Share Related Terms


Fulltech Fiber Glass Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Fulltech Fiber Glass'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.

Fulltech Fiber Glass Cyclically Adjusted Book per Share Chart

Fulltech Fiber Glass 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 17.42 18.09 18.19 18.23 18.35

Fulltech Fiber Glass 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 18.23 18.35 18.37 18.38 18.35

ROCO:1815 vs APH, GLW: Cyclically Adjusted Book per Share Comparison

For the Electronic Components subindustry, Fulltech Fiber Glass'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.


Fulltech Fiber Glass Cyclically Adjusted PB Ratio vs Hardware Industry

For the Hardware industry and Technology sector, Fulltech Fiber Glass's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Fulltech Fiber Glass's Cyclically Adjusted PB Ratio falls into.


ROCO:1815
59GF Score
Fulltech Fiber Glass Corp ROCO:1815
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Fulltech Fiber Glass 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, Fulltech Fiber Glass'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)
=21.709/324.0540*324.0540
=21.709

Current CPI (Dec. 2025) = 324.0540.

Fulltech Fiber Glass Quarterly Data

Book Value per Share CPI Adj_Book
201603 15.179 238.132 20.656
201606 14.906 241.018 20.041
201609 15.232 241.428 20.445
201612 15.834 241.432 21.253
201703 15.213 243.801 20.221
201706 15.157 244.955 20.051
201709 16.208 246.819 21.280
201712 16.313 246.524 21.443
201803 16.518 249.554 21.449
201806 15.792 251.989 20.308
201809 16.089 252.439 20.653
201812 15.912 251.233 20.524
201903 16.049 254.202 20.459
201906 15.494 256.143 19.602
201909 15.206 256.759 19.191
201912 15.159 256.974 19.116
202003 14.626 258.115 18.362
202006 14.906 257.797 18.737
202009 14.792 260.280 18.416
202012 14.664 260.474 18.243
202103 14.831 264.877 18.144
202106 15.155 271.696 18.075
202109 15.900 274.310 18.783
202112 16.094 278.802 18.706
202203 16.337 287.504 18.414
202206 15.656 296.311 17.122
202209 16.371 296.808 17.874
202212 15.976 296.797 17.443
202303 15.656 301.836 16.808
202306 15.067 305.109 16.003
202309 14.898 307.789 15.685
202312 14.238 306.746 15.041
202403 14.098 312.332 14.627
202406 14.124 314.175 14.568
202409 13.937 315.301 14.324
202412 14.848 315.605 15.245
202503 15.199 319.799 15.401
202506 14.528 322.561 14.595
202509 15.204 324.800 15.169
202512 21.709 324.054 21.709

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$18.35 mean?
Fulltech Fiber Glass (ROCO:1815) has a Cyclically Adjusted Book per Share of NT$18.35 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 Fulltech Fiber Glass and its competitors.
Is Fulltech Fiber Glass' Cyclically Adjusted Book per Share too high?
Fulltech Fiber Glass' current Cyclically Adjusted Book per Share is NT$18.35. Overall, Fulltech Fiber Glass has a GF Score™ of 59/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Fulltech Fiber Glass' Cyclically Adjusted Book per Share compare to APH and GLW?
Fulltech Fiber Glass' Cyclically Adjusted Book per Share of NT$18.35 can be compared against companies in the Hardware 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 Hardware company?
A good Cyclically Adjusted Book per Share depends on the Hardware 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 Fulltech Fiber Glass and its competitors. Fulltech Fiber Glass's current Cyclically Adjusted Book per Share is NT$18.35. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Fulltech Fiber Glass stock overvalued right now?
Based on GuruFocus' analysis, Fulltech Fiber Glass (ROCO:1815) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$35.94, compared to a current price of NT$96.50 — trading 168.5% above its estimated fair value. The current Cyclically Adjusted Book per Share is NT$18.35. Fulltech Fiber Glass' overall GF Score™ is 59/100 with 1 warning sign 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 Fulltech Fiber Glass (ROCO:1815), the current Cyclically Adjusted Book per Share is NT$18.35 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 Fulltech Fiber Glass (ROCO:1815) Overvalued in 2026?

Based on GuruFocus' analysis, Fulltech Fiber Glass stock appears to be overvalued. The current stock price of NT$96.50 is trading 168.5% above its estimated GF Value™ of NT$35.94. GuruFocus considers Fulltech Fiber Glass to be Significantly Overvalued.

Key valuation signals for ROCO:1815:

  • Cyclically Adjusted Book per Share: NT$18.35
  • GF Value™: NT$35.94 vs. price of NT$96.50 (168.5% above fair value)
  • GF Score™: 59/100 with 1 warning sign

No single metric tells the full story. See the ROCO:1815 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Fulltech Fiber Glass Business Description

Address No. 8, Dougong 16th Road, Yunlin County, Douliu, TWN
Fulltech Fiber Glass Corp is engaged in producing and selling fiberglass yarn and fiberglass fabric, which are the main upstream materials for Printed Circuit Boards. The reportable segments of the company are the Fiberglass Yarn and the Fiberglass Fabric segment. Geographically, the company generates a majority of its revenue from Taiwan and the rest from China.
59GF Score

Get the complete analysis for ROCO:1815

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

NT$96.50
Price
NT$35.94
GF Value