East Tender Optoelectronics (ROCO:6588) Cyclically Adjusted Book per Share: NT$27.93 (As of Jun. 2026)

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ROCO:6588 East Tender Optoelectronics Corp ROCO:6588
64 GF Score
Price NT$107.50
GF Value NT$64.44
Valuation Significantly Overvalued
! 4 Warning Signs
View Full Analysis

What is East Tender Optoelectronics Cyclically Adjusted Book per Share?

East Tender Optoelectronics ROCO:6588 -4.44% 64 Cyclically Adjusted Book per Share is NT$27.93 as of Jun. 2026. GuruFocus rates ROCO:6588 with a GF Score™ of 64/100 and a GF Value™ of NT$64.44 (Significantly Overvalued). The stock has 4 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.

East Tender Optoelectronics's adjusted book value per share for the three months ended in Jun. 2026 was NT$22.524. 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$27.93 for the trailing ten years ended in Jun. 2026.

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.

As of today (2026-09-11), East Tender Optoelectronics's current stock price is NT$107.50. East Tender Optoelectronics's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 was NT$27.93. East Tender Optoelectronics's Cyclically Adjusted PB Ratio of today is 3.85.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of East Tender Optoelectronics was 4.01. The lowest was 2.56. And the median was 3.21.


East Tender Optoelectronics  (ROCO:6588) 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.

East Tender Optoelectronics's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=107.50/27.93
=3.85

* 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 East Tender Optoelectronics was 4.01. The lowest was 2.56. And the median was 3.21.


Be Aware

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


East Tender Optoelectronics Cyclically Adjusted Book per Share Related Terms


East Tender Optoelectronics Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for East Tender Optoelectronics'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.

East Tender Optoelectronics Cyclically Adjusted Book per Share Chart

East Tender Optoelectronics 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 0.00 0.00 0.00 0.00 0.00

East Tender Optoelectronics Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
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 0.00 0.00 0.00 0.00 27.93

ROCO:6588 vs NVDA, AVGO, MU: Cyclically Adjusted Book per Share Comparison

For the Semiconductors subindustry, East Tender Optoelectronics'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.


East Tender Optoelectronics Cyclically Adjusted PB Ratio vs Semiconductors Industry

For the Semiconductors industry and Technology sector, East Tender Optoelectronics's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where East Tender Optoelectronics's Cyclically Adjusted PB Ratio falls into.


ROCO:6588
64GF Score
East Tender Optoelectronics Corp ROCO:6588
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

East Tender Optoelectronics 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, East Tender Optoelectronics's adjusted Book Value per Share data for the three months ended in Jun. 2026 was:

Adj_Book= Book Value per Share /CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=22.524/333.9520*333.9520
=22.524

Current CPI (Jun. 2026) = 333.9520.

East Tender Optoelectronics Quarterly Data

Book Value per Share CPI Adj_Book
201312 15.266 233.049 21.876
201412 12.125 234.812 17.244
201512 15.313 236.525 21.621
201606 13.128 241.018 18.190
201612 17.210 241.432 23.805
201706 18.346 244.955 25.011
201712 21.067 246.524 28.538
201806 19.493 251.989 25.833
201809 0.000 252.439 0.000
201812 19.647 251.233 26.116
201903 0.000 254.202 0.000
201906 19.702 256.143 25.687
201909 20.037 256.759 26.061
201912 20.842 256.974 27.085
202003 21.175 258.115 27.396
202006 29.184 257.797 37.805
202009 29.893 260.280 38.354
202012 30.360 260.474 38.924
202103 30.522 264.877 38.482
202106 30.742 271.696 37.786
202109 29.317 274.310 35.691
202112 29.398 278.802 35.213
202203 29.651 287.504 34.441
202206 28.890 296.311 32.560
202209 29.020 296.808 32.652
202212 28.024 296.797 31.532
202303 27.577 301.836 30.511
202306 26.976 305.109 29.526
202309 26.265 307.789 28.498
202312 25.242 306.746 27.481
202403 24.362 312.332 26.048
202406 23.493 314.175 24.972
202409 22.852 315.301 24.204
202412 23.935 315.605 25.326
202503 23.180 319.799 24.206
202506 22.191 322.561 22.975
202509 21.686 324.800 22.297
202512 22.051 324.054 22.725
202603 22.063 330.213 22.313
202606 22.524 333.952 22.524

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$27.93 mean?
East Tender Optoelectronics (ROCO:6588) has a Cyclically Adjusted Book per Share of NT$27.93 as of Jun. 2026. 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 East Tender Optoelectronics and its competitors.
Is East Tender Optoelectronics' Cyclically Adjusted Book per Share too high?
East Tender Optoelectronics' current Cyclically Adjusted Book per Share is NT$27.93. Overall, East Tender Optoelectronics has a GF Score™ of 64/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does East Tender Optoelectronics' Cyclically Adjusted Book per Share compare to NVDA and AVGO?
East Tender Optoelectronics' Cyclically Adjusted Book per Share of NT$27.93 can be compared against companies in the Semiconductors 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 Semiconductors company?
A good Cyclically Adjusted Book per Share depends on the Semiconductors 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 East Tender Optoelectronics and its competitors. East Tender Optoelectronics's current Cyclically Adjusted Book per Share is NT$27.93. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is East Tender Optoelectronics stock overvalued right now?
Based on GuruFocus' analysis, East Tender Optoelectronics (ROCO:6588) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$64.44, compared to a current price of NT$107.50 — trading 66.8% above its estimated fair value. The current Cyclically Adjusted Book per Share is NT$27.93. East Tender Optoelectronics' overall GF Score™ is 64/100 with 4 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 East Tender Optoelectronics (ROCO:6588), the current Cyclically Adjusted Book per Share is NT$27.93 as of Jun. 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 East Tender Optoelectronics (ROCO:6588) Overvalued in 2026?

Based on GuruFocus' analysis, East Tender Optoelectronics stock appears to be overvalued. The current stock price of NT$107.50 is trading 66.8% above its estimated GF Value™ of NT$64.44. GuruFocus considers East Tender Optoelectronics to be Significantly Overvalued.

Key valuation signals for ROCO:6588:

  • Cyclically Adjusted Book per Share: NT$27.93
  • GF Value™: NT$64.44 vs. price of NT$107.50 (66.8% above fair value)
  • GF Score™: 64/100 with 4 warning signs

No single metric tells the full story. See the ROCO:6588 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


East Tender Optoelectronics Business Description

Address No. 70, Section 2, Ligong 1st Road, Wujie Township, Yilan, TWN
East Tender Optoelectronics Corp is a Taiwan-based company engaged in developing and providing optical coating products and services. It offers narrow-band and broad-band filter chips.
64GF Score

Get the complete analysis for ROCO:6588

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

NT$107.50
Price
NT$64.44
GF Value