United Microelectronics (STU:UMCB) Cyclically Adjusted Book per Share: €3.55 (As of Mar. 2026)


STU:UMCB United Microelectronics Corp STU:UMCB
79 GF Score
Price €21.40
GF Value €6.92
Valuation Significantly Overvalued
! 9 Warning Signs
View Full Analysis

What is United Microelectronics Cyclically Adjusted Book per Share?

United Microelectronics STU:UMCB -0.93% 79 Cyclically Adjusted Book per Share is €3.55 as of Mar. 2026. GuruFocus rates STU:UMCB with a GF Score™ of 79/100 and a GF Value™ of €6.92 (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.

United Microelectronics's adjusted book value per share for the three months ended in Mar. 2026 was €4.388. 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 €3.55 for the trailing ten years ended in Mar. 2026.

During the past 12 months, United Microelectronics's average Cyclically Adjusted Book Growth Rate was 5.20% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 5.50% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 6.50% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 3.90% 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 United Microelectronics was 7.30% per year. The lowest was -1.60% per year. And the median was 1.00% per year.

As of today (2026-07-12), United Microelectronics's current stock price is €21.40. United Microelectronics's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was €3.55. United Microelectronics's Cyclically Adjusted PB Ratio of today is 6.03.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of United Microelectronics was 6.54. The lowest was 0.58. And the median was 1.79.


United Microelectronics  (STU:UMCB) 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.

United Microelectronics's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=21.40/3.55
=6.03

* 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 United Microelectronics was 6.54. The lowest was 0.58. And the median was 1.79.


Be Aware

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


United Microelectronics Cyclically Adjusted Book per Share Related Terms


United Microelectronics Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for United Microelectronics'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.

United Microelectronics Cyclically Adjusted Book per Share Chart

United Microelectronics 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 3.13 3.31 3.34 3.55 3.41

United Microelectronics Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
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 3.41 3.60 3.51 3.41 3.55

STU:UMCB vs NVDA, AVGO, MU: Cyclically Adjusted Book per Share Comparison

For the Semiconductors subindustry, United Microelectronics'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.


United Microelectronics Cyclically Adjusted PB Ratio vs Semiconductors Industry

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

* The bar in red indicates where United Microelectronics's Cyclically Adjusted PB Ratio falls into.


STU:UMCB
79GF Score
United Microelectronics Corp STU:UMCB
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

United Microelectronics 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, United Microelectronics's adjusted Book Value per Share data for the three months ended in Mar. 2026 was:

Adj_Book= Book Value per Share /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=4.388/330.2130*330.2130
=4.388

Current CPI (Mar. 2026) = 330.2130.

United Microelectronics Quarterly Data

Book Value per Share CPI Adj_Book
201606 2.453 241.018 3.361
201609 2.519 241.428 3.445
201612 2.578 241.432 3.526
201703 2.692 243.801 3.646
201706 2.554 244.955 3.443
201709 2.430 246.819 3.251
201712 2.408 246.524 3.225
201803 2.462 249.554 3.258
201806 2.487 251.989 3.259
201809 2.419 252.439 3.164
201812 2.438 251.233 3.204
201903 2.518 254.202 3.271
201906 2.436 256.143 3.140
201909 2.554 256.759 3.285
201912 2.764 256.974 3.552
202003 2.892 258.115 3.700
202006 2.578 257.797 3.302
202009 2.584 260.280 3.278
202012 2.639 260.474 3.346
202103 3.011 264.877 3.754
202106 2.912 271.696 3.539
202109 3.204 274.310 3.857
202112 3.374 278.802 3.996
202203 3.863 287.504 4.437
202206 3.621 296.311 4.035
202209 4.072 296.808 4.530
202212 3.971 296.797 4.418
202303 4.344 301.836 4.752
202306 3.908 305.109 4.230
202309 4.089 307.789 4.387
202312 4.021 306.746 4.329
202403 4.378 312.332 4.629
202406 4.074 314.175 4.282
202409 4.143 315.301 4.339
202412 4.265 315.605 4.462
202503 4.362 319.799 4.504
202506 3.926 322.561 4.019
202509 4.034 324.800 4.101
202512 3.958 324.054 4.033
202603 4.388 330.213 4.388

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 €3.55 mean?
United Microelectronics (STU:UMCB) has a Cyclically Adjusted Book per Share of €3.55 as of Mar. 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 United Microelectronics and its competitors.
Is United Microelectronics' Cyclically Adjusted Book per Share too high?
United Microelectronics' current Cyclically Adjusted Book per Share is €3.55. Overall, United Microelectronics has a GF Score™ of 79/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does United Microelectronics' Cyclically Adjusted Book per Share compare to NVDA and AVGO?
United Microelectronics' Cyclically Adjusted Book per Share of €3.55 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 United Microelectronics and its competitors. United Microelectronics's current Cyclically Adjusted Book per Share is €3.55. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is United Microelectronics stock overvalued right now?
Based on GuruFocus' analysis, United Microelectronics (STU:UMCB) is currently considered Significantly Overvalued. The stock's GF Value™ is €6.92, compared to a current price of €21.40 — trading 209.2% above its estimated fair value. The current Cyclically Adjusted Book per Share is €3.55. United Microelectronics' overall GF Score™ is 79/100 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 United Microelectronics (STU:UMCB), the current Cyclically Adjusted Book per Share is €3.55 as of Mar. 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 United Microelectronics (STU:UMCB) Overvalued in 2026?

Based on GuruFocus' analysis, United Microelectronics stock appears to be overvalued. The current stock price of €21.40 is trading 209.2% above its estimated GF Value™ of €6.92. GuruFocus considers United Microelectronics to be Significantly Overvalued.

Key valuation signals for STU:UMCB:

  • Cyclically Adjusted Book per Share: €3.55
  • GF Value™: €6.92 vs. price of €21.40 (209.2% above fair value)
  • GF Score™: 79/100 with 9 warning signs

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


United Microelectronics Business Description

Address No. 3, Li-Hsin 2nd Road, Hsinchu Science Park, Hsinchu, TWN
Founded in 1980, United Microelectronics is the world's third-largest dedicated chip foundry, with close to 5% market share in 2025 after TSMC and SMIC. UMC's headquarters are in Hsinchu, Taiwan, and it operates 12 fabs in Taiwan, Mainland China, Japan and Singapore, with additional sales offices in Europe, the US, and South Korea. UMC features a diverse customer base that includes Texas Instruments, MediaTek, Intel, Broadcom, Novatek, and Realtek, supplying a wide range of products applied in communications, display, memory, automotive and more. UMC employs about 19,000 people as of February 2025.
79GF Score

Get the complete analysis for STU:UMCB

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

€21.40
Price
€6.92
GF Value