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United MicroelectronicsSTU:UMCB +0.61%79 Cyclically Adjusted PB Ratio is 4.26 as of Aug. 12, 2026, which is 137% above its 10-year median of 1.80. GuruFocus rates STU:UMCB with a GF Score™ of 79/100 and a GF Value™ of €7.84 (Significantly Overvalued). The stock has 3 warning signs investors should review. Among 728 Semiconductors companies, United Microelectronics ranks worse than 59.48% on this metric.
The historical rank and industry rank for United Microelectronics's Cyclically Adjusted PB Ratio or its related term are showing as below:
STU:UMCB'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0.58 Med: 1.8 Max: 6.4
Current: 4.62
During the past years, United Microelectronics's highest Cyclically Adjusted PB Ratio was 6.40. The lowest was 0.58. And the median was 1.80.
STU:UMCB's Cyclically Adjusted PB Ratio is ranked worse than 59.48% of 728
companies
in the Semiconductors industry
Industry Median: 3.225
vs STU:UMCB: 4.62
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 adjusted book value per share data for the three months ended in Jun. 2026 was €4.856. 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 €3.85 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
United Microelectronics (STU:UMCB) Cyclically Adjusted PB Ratio Explanation
Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.
United Microelectronics Cyclically Adjusted PB Ratio Related Terms
United Microelectronics Cyclically Adjusted PB Ratio Historical Data
* Premium members only.
The historical data trend for United Microelectronics's Cyclically Adjusted PB Ratio 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 PB Ratio Chart
STU:UMCB vs NVDA, AVGO, MU: Cyclically Adjusted PB Ratio 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.
United Microelectronics Cyclically Adjusted PB Ratio Calculation
Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.
* 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.
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.
What does a Cyclically Adjusted PB Ratio of 4.26 mean?
United Microelectronics (STU:UMCB) has a Cyclically Adjusted PB Ratio of 4.26 as of Aug. 12, 2026. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on United Microelectronics and its competitors. This is 137% above median its historical median of 1.80. Over the past decade, United Microelectronics' Cyclically Adjusted PB Ratio has ranged from 0.58 to 6.40. According to the industry distribution chart, United Microelectronics ranks #433 out of 728 companies in the Semiconductors industry, placing it in the top 59.5%.
Is United Microelectronics' Cyclically Adjusted PB Ratio too high?
United Microelectronics' current Cyclically Adjusted PB Ratio of 4.26 is 137% above median its 10-year median of 1.80. Over the past 10 years, this metric has ranged from a low of 0.58 to a high of 6.40. The Semiconductors industry median Cyclically Adjusted PB Ratio is 3.23. United Microelectronics' value of 4.26 is 32.1% above this industry median. Based on the distribution chart, United Microelectronics ranks #433 out of 728 companies in the Semiconductors industry, which is below the industry midpoint. 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 PB Ratio compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, United Microelectronics ranks #433 out of 728 companies for Cyclically Adjusted PB Ratio. This places United Microelectronics in the lower half of its industry. The industry median Cyclically Adjusted PB Ratio is 3.23. United Microelectronics' value of 4.26 is 32.1% above this benchmark. Historically, United Microelectronics' own Cyclically Adjusted PB Ratio has ranged from 0.58 to 6.40 over the past decade. While the company's 10-year median is 1.80 vs. the industry median of 3.23, United Microelectronics has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted PB Ratio for a Semiconductors company?
The median Cyclically Adjusted PB Ratio among Semiconductors companies is 3.23, based on 728 companies in the industry. Companies in the top quartile (top 25%) have a Cyclically Adjusted PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, Cyclically Adjusted PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. United Microelectronics's current Cyclically Adjusted PB Ratio of 4.26 is 32.1% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Cyclically Adjusted PB Ratio mean?
A high Cyclically Adjusted PB Ratio can signal that a stock is expensive relative to its fundamentals. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on United Microelectronics and its competitors. For the Semiconductors industry, the median Cyclically Adjusted PB Ratio is 3.23 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. United Microelectronics's current Cyclically Adjusted PB Ratio is 4.26, which is 137% above median its own 10-year median of 1.80. 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 €7.84, compared to a current price of €16.40 — trading 109.2% above its estimated fair value. The current Cyclically Adjusted PB Ratio is 4.26, which is 137% above median its 10-year median of 1.80 and 32.1% above the Semiconductors industry median of 3.23. United Microelectronics' overall GF Score™ is 79/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted PB Ratio calculated?
Cyclically Adjusted PB Ratio is calculated from a company's financial statements. For United Microelectronics (STU:UMCB), the current Cyclically Adjusted PB Ratio is 4.26 as of Aug. 12, 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 €16.40 is trading 109.2% above its estimated GF Value™ of €7.84.
GuruFocus considers United Microelectronics to be Significantly Overvalued.
Key valuation signals for STU:UMCB:
Cyclically Adjusted PB Ratio: 4.26 (137% above median its 10-year median of 1.80)
GF Value™: €7.84 vs. price of €16.40 (109.2% above fair value)
Industry Position: 32.1% above the Semiconductors median (#433 of 728)
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.
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
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