Sino-American Silicon Products (ROCO:5483) E10: NT$8.54 (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:5483 Sino-American Silicon Products Inc ROCO:5483
77 GF Score
Price NT$212.50
GF Value NT$151.36
Valuation Significantly Overvalued
! 13 Warning Signs
View Full Analysis

What is Sino-American Silicon Products E10?

Sino-American Silicon Products ROCO:5483 -9.19% 77 E10 is NT$8.54 as of Dec. 2025. GuruFocus rates ROCO:5483 with a GF Score™ of 77/100 and a GF Value™ of NT$151.36 (Significantly Overvalued). The stock has 13 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.

Sino-American Silicon Products's adjusted earnings per share data for the three months ended in Dec. 2025 was NT$2.620. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is NT$8.54 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Sino-American Silicon Products's average E10 Growth Rate was 9.80% per year. During the past 3 years, the average E10 Growth Rate was 18.10% per year. During the past 5 years, the average E10 Growth Rate was 34.20% 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 Sino-American Silicon Products was 49.20% per year. The lowest was 18.10% per year. And the median was 42.10% per year.

As of today (2026-07-23), Sino-American Silicon Products's current stock price is NT$212.50. Sino-American Silicon Products's E10 for the quarter that ended in Dec. 2025 was NT$8.54. Sino-American Silicon Products's Shiller PE Ratio of today is 24.88.

During the past 13 years, the highest Shiller PE Ratio of Sino-American Silicon Products was 116.04. The lowest was 11.24. And the median was 37.01.


Sino-American Silicon Products  (ROCO:5483) 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.

Sino-American Silicon Products's Shiller P/E Ratio of today is calculated as

Shiller PE Ratio=Share Price/E10
=212.50/8.54
=24.88

* 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 Sino-American Silicon Products was 116.04. The lowest was 11.24. And the median was 37.01.


Be Aware

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


Sino-American Silicon Products E10 Related Terms


Sino-American Silicon Products E10 Historical Data

* Premium members only.

The historical data trend for Sino-American Silicon Products'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.

Sino-American Silicon Products E10 Chart

Sino-American Silicon Products 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 2.71 5.18 6.93 7.78 8.54

Sino-American Silicon Products 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 7.78 7.96 8.14 8.30 8.54

ROCO:5483 vs AMAT, LRCX, KLAC: E10 Comparison

For the Semiconductor Equipment & Materials subindustry, Sino-American Silicon Products'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.


Sino-American Silicon Products Shiller PE Ratio vs Semiconductors Industry

For the Semiconductors industry and Technology sector, Sino-American Silicon Products's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where Sino-American Silicon Products's Shiller PE Ratio falls into.


ROCO:5483
77GF Score
Sino-American Silicon Products Inc ROCO:5483
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Sino-American Silicon Products 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, Sino-American Silicon Products'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)
=2.62/324.0540*324.0540
=2.620

Current CPI (Dec. 2025) = 324.0540.

Sino-American Silicon Products Quarterly Data

per share eps CPI Adj_EPS
201603 0.360 238.132 0.490
201606 0.510 241.018 0.686
201609 -2.270 241.428 -3.047
201612 -1.370 241.432 -1.839
201703 -0.700 243.801 -0.930
201706 0.220 244.955 0.291
201709 1.340 246.819 1.759
201712 0.930 246.524 1.222
201803 1.230 249.554 1.597
201806 1.690 251.989 2.173
201809 1.420 252.439 1.823
201812 -0.990 251.233 -1.277
201903 3.130 254.202 3.990
201906 -3.920 256.143 -4.959
201909 2.750 256.759 3.471
201912 1.850 256.974 2.333
202003 2.350 258.115 2.950
202006 2.580 257.797 3.243
202009 2.840 260.280 3.536
202012 2.950 260.474 3.670
202103 2.490 264.877 3.046
202106 3.600 271.696 4.294
202109 3.100 274.310 3.662
202112 2.380 278.802 2.766
202203 2.150 287.504 2.423
202206 3.100 296.311 3.390
202209 5.280 296.808 5.765
202212 4.250 296.797 4.640
202303 4.180 301.836 4.488
202306 4.140 305.109 4.397
202309 4.590 307.789 4.833
202312 4.020 306.746 4.247
202403 3.390 312.332 3.517
202406 2.940 314.175 3.032
202409 2.350 315.301 2.415
202412 0.540 315.605 0.554
202503 1.190 319.799 1.206
202506 1.170 322.561 1.175
202509 1.700 324.800 1.696
202512 2.620 324.054 2.620

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$8.54 mean?
Sino-American Silicon Products (ROCO:5483) has a E10 of NT$8.54 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Sino-American Silicon Products and its competitors.
Is Sino-American Silicon Products' E10 too high?
Sino-American Silicon Products' current E10 is NT$8.54. Overall, Sino-American Silicon Products has a GF Score™ of 77/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Sino-American Silicon Products' E10 compare to AMAT and LRCX?
Sino-American Silicon Products' E10 of NT$8.54 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 E10 for a Semiconductors company?
A good E10 depends on the Semiconductors 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 Sino-American Silicon Products and its competitors. Sino-American Silicon Products's current E10 is NT$8.54. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Sino-American Silicon Products stock overvalued right now?
Based on GuruFocus' analysis, Sino-American Silicon Products (ROCO:5483) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$151.36, compared to a current price of NT$212.50 — trading 40.4% above its estimated fair value. The current E10 is NT$8.54. Sino-American Silicon Products' overall GF Score™ is 77/100 with 13 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 Sino-American Silicon Products (ROCO:5483), the current E10 is NT$8.54 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 Sino-American Silicon Products (ROCO:5483) Overvalued in 2026?

Based on GuruFocus' analysis, Sino-American Silicon Products stock appears to be overvalued. The current stock price of NT$212.50 is trading 40.4% above its estimated GF Value™ of NT$151.36. GuruFocus considers Sino-American Silicon Products to be Significantly Overvalued.

Key valuation signals for ROCO:5483:

  • E10: NT$8.54
  • GF Value™: NT$151.36 vs. price of NT$212.50 (40.4% above fair value)
  • GF Score™: 77/100 with 13 warning signs

No single metric tells the full story. See the ROCO:5483 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Sino-American Silicon Products Business Description

Address Industrial East Road 2, No. 8, 4th Floor, Science Based Industrial Park, Hsinchu, TWN
Founded in 1981, Sino-American Silicon Products Inc. is a holding company specializing in the semiconductor industry. Its crown jewel is its 46.64% stake in silicon wafer producer GlobalWafers, which was carved out in 2011. GlobalWafers runs 18 production sites in nine countries across Asia, North America, and Europe. Other notable investments include Advanced Wireless Semiconductor Company, Actron Technology, and Taiwan Specialty Materials. SAS started selling renewable energy to power grids in October 2022. SAS is headquartered in Hsinchu, Taiwan. SAS employs about 8,000 people through its subsidiaries. Through GlobalWafers, SAS had nearly 17% market share in silicon wafers in 2025.
77GF Score

Get the complete analysis for ROCO:5483

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

NT$212.50
Price
NT$151.36
GF Value