Adda (ROCO:3071) E10: NT$1.65 (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:3071 Adda Corp ROCO:3071
58 GF Score
Price NT$27.50
GF Value NT$27.32
Valuation Fairly Valued
! 5 Warning Signs
View Full Analysis

What is Adda E10?

Adda ROCO:3071 -3.17% 58 E10 is NT$1.65 as of Dec. 2025. GuruFocus rates ROCO:3071 with a GF Score™ of 58/100 and a GF Value™ of NT$27.32 (Fairly Valued). The stock has 5 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.

Adda's adjusted earnings per share data for the three months ended in Dec. 2025 was NT$0.040. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is NT$1.65 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Adda's average E10 Growth Rate was 5.80% per year. During the past 3 years, the average E10 Growth Rate was 13.80% per year. During the past 5 years, the average E10 Growth Rate was 19.20% 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 E10 growth rate using E10 data.

During the past 13 years, the highest 3-Year average E10 Growth Rate of Adda was 26.60% per year. The lowest was 13.80% per year. And the median was 17.20% per year.

As of today (2026-07-16), Adda's current stock price is NT$27.50. Adda's E10 for the quarter that ended in Dec. 2025 was NT$1.65. Adda's Shiller PE Ratio of today is 16.67.

During the past 13 years, the highest Shiller PE Ratio of Adda was 43.11. The lowest was 10.85. And the median was 25.12.


Adda  (ROCO:3071) E10 Explanation

If a company grows much fast than inflation, E10 may underestimate the company's earnings power. Shiller PE Ratio can seem to be too high even the actual P/E is low.

For the Shiller P/E, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller P/E is also called PE10.

The Shiller P/E was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.

Adda's Shiller P/E Ratio of today is calculated as

Shiller PE Ratio=Share Price/E10
=27.50/1.65
=16.67

* 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 Shiller P/E Ratio of Adda was 43.11. The lowest was 10.85. And the median was 25.12.


Be Aware

Shiller PE Ratio works better for cyclical companies. It gives you a better idea on the company's real earnings power.


Adda E10 Related Terms


Adda E10 Historical Data

* Premium members only.

The historical data trend for Adda's E10 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.

Adda E10 Chart

Adda Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.89 1.12 1.44 1.56 1.65

Adda Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
E10 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 1.56 1.59 1.65 1.66 1.65

ROCO:3071 vs VRT, BE: E10 Comparison

For the Electrical Equipment & Parts subindustry, Adda's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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.


Adda Shiller PE Ratio vs Industrial Products Industry

For the Industrial Products industry and Industrials sector, Adda's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where Adda's Shiller PE Ratio falls into.


ROCO:3071
58GF Score
Adda Corp ROCO:3071
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Adda E10 Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. When we calculate the today's Shiller P/E ratio of a stock, we use today's price divided by E10.

What is E10? How do we calculate E10?

E10 is the average of the inflation adjusted earnings of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the E10 of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the earnings from 2001 through 2010.

We adjusted the earnings of 2001 earnings data with the total inflation from 2001 through 2010 to the equivalent earnings in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart earned $1 a share in 2001, then the 2001's equivalent earnings in 2010 is $1.4 a share. If Wal-Mart earns $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 earnings in 2010 is $1.35. So on and so forth, you get the equivalent earnings of past 10 years. Then you add them together and divided the sum by 10 to get E10.

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, Adda's adjusted earnings per share data for the three months ended in Dec. 2025 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=0.04/324.0540*324.0540
=0.040

Current CPI (Dec. 2025) = 324.0540.

Adda Quarterly Data

per share eps CPI Adj_EPS
201603 0.022 238.132 0.030
201606 0.207 241.018 0.278
201609 0.284 241.428 0.381
201612 0.120 241.432 0.161
201703 0.240 243.801 0.319
201706 0.316 244.955 0.418
201709 0.425 246.819 0.558
201712 0.316 246.524 0.415
201803 0.404 249.554 0.525
201806 0.513 251.989 0.660
201809 0.510 252.439 0.655
201812 0.260 251.233 0.335
201903 0.260 254.202 0.331
201906 0.490 256.143 0.620
201909 0.720 256.759 0.909
201912 0.350 256.974 0.441
202003 0.210 258.115 0.264
202006 0.800 257.797 1.006
202009 0.530 260.280 0.660
202012 0.280 260.474 0.348
202103 0.370 264.877 0.453
202106 0.440 271.696 0.525
202109 0.610 274.310 0.721
202112 0.430 278.802 0.500
202203 0.380 287.504 0.428
202206 0.730 296.311 0.798
202209 0.650 296.808 0.710
202212 0.320 296.797 0.349
202303 0.150 301.836 0.161
202306 0.680 305.109 0.722
202309 0.220 307.789 0.232
202312 0.160 306.746 0.169
202403 0.060 312.332 0.062
202406 0.290 314.175 0.299
202409 0.140 315.301 0.144
202412 0.330 315.605 0.339
202503 0.020 319.799 0.020
202506 0.460 322.561 0.462
202509 0.050 324.800 0.050
202512 0.040 324.054 0.040

Add all the adjusted EPS together and divide 10 will get our e10.

Frequently Asked Questions Learn more about E10 →
What does a E10 of NT$1.65 mean?
Adda (ROCO:3071) has a E10 of NT$1.65 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Adda and its competitors.
Is Adda's E10 too high?
Adda's current E10 is NT$1.65. Overall, Adda has a GF Score™ of 58/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Adda's E10 compare to VRT and BE?
Adda's E10 of NT$1.65 can be compared against companies in the Industrial Products industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good E10 for an Industrial Products company?
A good E10 depends on the Industrial Products industry context. However, E10 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 E10 mean?
A high E10 can signal that a stock is expensive relative to its fundamentals. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Adda and its competitors. Adda's current E10 is NT$1.65. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Adda stock overvalued right now?
Based on GuruFocus' analysis, Adda (ROCO:3071) is currently considered Fairly Valued. The stock's GF Value™ is NT$27.32, compared to a current price of NT$27.50 — trading 0.7% above its estimated fair value. The current E10 is NT$1.65. Adda's overall GF Score™ is 58/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is E10 calculated?
E10 is calculated from a company's financial statements. For Adda (ROCO:3071), the current E10 is NT$1.65 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 Adda (ROCO:3071) Overvalued in 2026?

Based on GuruFocus' analysis, Adda stock appears to be overvalued. The current stock price of NT$27.50 is trading 0.7% above its estimated GF Value™ of NT$27.32. GuruFocus considers Adda to be Fairly Valued.

Key valuation signals for ROCO:3071:

  • E10: NT$1.65
  • GF Value™: NT$27.32 vs. price of NT$27.50 (0.7% above fair value)
  • GF Score™: 58/100 with 5 warning signs

No single metric tells the full story. See the ROCO:3071 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Adda Business Description

Address No. 6, East Section Industry 6th Road, Pingtung County, Pingtung, TWN, 90049
Adda Corp is a Taiwan-based company that engages in the manufacturing and sales of computer fans, power switches, and electrical equipment. It has two reportable segments Fan division and Other division. It generates the majority of its revenue from the Fan division. Its products include Fan series, Thermal modules, Applications, and Accessories. Its geographic areas are Taiwan, the USA, China, Japan, and Others.
58GF Score

Get the complete analysis for ROCO:3071

E10 is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

NT$27.50
Price
NT$27.32
GF Value