Formosa Petrochemical (TPE:6505) Cyclically Adjusted Book per Share: NT$40.54 (As of Mar. 2026)

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.

TPE:6505 Formosa Petrochemical Corp TPE:6505
84 GF Score
Price NT$81.30
GF Value NT$54.02
Valuation Significantly Overvalued
! 5 Warning Signs
View Full Analysis

What is Formosa Petrochemical Cyclically Adjusted Book per Share?

Formosa Petrochemical TPE:6505 +1.62% 84 Cyclically Adjusted Book per Share is NT$40.54 as of Mar. 2026. GuruFocus rates TPE:6505 with a GF Score™ of 84/100 and a GF Value™ of NT$54.02 (Significantly Overvalued). The stock has 5 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.

Formosa Petrochemical's adjusted book value per share for the three months ended in Mar. 2026 was NT$39.373. 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$40.54 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Formosa Petrochemical's average Cyclically Adjusted Book Growth Rate was 2.60% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 2.80% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 5.10% 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 Formosa Petrochemical was 7.20% per year. The lowest was 2.80% per year. And the median was 5.10% per year.

As of today (2026-07-19), Formosa Petrochemical's current stock price is NT$81.30. Formosa Petrochemical's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was NT$40.54. Formosa Petrochemical's Cyclically Adjusted PB Ratio of today is 2.01.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Formosa Petrochemical was 3.98. The lowest was 0.84. And the median was 2.32.


Formosa Petrochemical  (TPE:6505) 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.

Formosa Petrochemical's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=81.30/40.54
=2.01

* 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 Formosa Petrochemical was 3.98. The lowest was 0.84. And the median was 2.32.


Be Aware

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


Formosa Petrochemical Cyclically Adjusted Book per Share Related Terms


Formosa Petrochemical Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Formosa Petrochemical'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.

Formosa Petrochemical Cyclically Adjusted Book per Share Chart

Formosa Petrochemical 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 33.70 36.62 38.09 39.08 39.80

Formosa Petrochemical 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 39.51 39.73 39.92 39.80 40.54

TPE:6505 vs VLO, MPC, PSX: Cyclically Adjusted Book per Share Comparison

For the Oil & Gas Refining & Marketing subindustry, Formosa Petrochemical'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.


Formosa Petrochemical Cyclically Adjusted PB Ratio vs Oil & Gas Industry

For the Oil & Gas industry and Energy sector, Formosa Petrochemical's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


TPE:6505
84GF Score
Formosa Petrochemical Corp TPE:6505
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Formosa Petrochemical 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, Formosa Petrochemical'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)
=39.373/330.2130*330.2130
=39.373

Current CPI (Mar. 2026) = 330.2130.

Formosa Petrochemical Quarterly Data

Book Value per Share CPI Adj_Book
201606 27.546 241.018 37.740
201609 29.248 241.428 40.004
201612 32.444 241.432 44.375
201703 34.683 243.801 46.976
201706 30.310 244.955 40.860
201709 33.817 246.819 45.243
201712 35.827 246.524 47.989
201803 39.092 249.554 51.727
201806 35.682 251.989 46.759
201809 36.487 252.439 47.728
201812 35.455 251.233 46.601
201903 37.026 254.202 48.097
201906 33.062 256.143 42.623
201909 34.109 256.759 43.867
201912 34.666 256.974 44.546
202003 31.428 258.115 40.207
202006 28.000 257.797 35.865
202009 29.331 260.280 37.212
202012 32.343 260.474 41.002
202103 34.839 264.877 43.433
202106 35.114 271.696 42.677
202109 36.492 274.310 43.929
202112 37.520 278.802 44.439
202203 38.934 287.504 44.718
202206 35.698 296.311 39.782
202209 34.268 296.808 38.125
202212 32.804 296.797 36.497
202303 33.050 301.836 36.157
202306 32.917 305.109 35.625
202309 34.701 307.789 37.229
202312 35.307 306.746 38.008
202403 33.663 312.332 35.590
202406 34.307 314.175 36.058
202409 32.519 315.301 34.057
202412 31.174 315.605 32.617
202503 31.042 319.799 32.053
202506 30.090 322.561 30.804
202509 32.215 324.800 32.752
202512 37.350 324.054 38.060
202603 39.373 330.213 39.373

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$40.54 mean?
Formosa Petrochemical (TPE:6505) has a Cyclically Adjusted Book per Share of NT$40.54 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 Formosa Petrochemical and its competitors.
Is Formosa Petrochemical's Cyclically Adjusted Book per Share too high?
Formosa Petrochemical's current Cyclically Adjusted Book per Share is NT$40.54. Overall, Formosa Petrochemical has a GF Score™ of 84/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Formosa Petrochemical's Cyclically Adjusted Book per Share compare to VLO and MPC?
Formosa Petrochemical's Cyclically Adjusted Book per Share of NT$40.54 can be compared against companies in the Oil & Gas 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 an Oil & Gas company?
A good Cyclically Adjusted Book per Share depends on the Oil & Gas 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 Formosa Petrochemical and its competitors. Formosa Petrochemical's current Cyclically Adjusted Book per Share is NT$40.54. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Formosa Petrochemical stock overvalued right now?
Based on GuruFocus' analysis, Formosa Petrochemical (TPE:6505) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$54.02, compared to a current price of NT$81.30 — trading 50.5% above its estimated fair value. The current Cyclically Adjusted Book per Share is NT$40.54. Formosa Petrochemical's overall GF Score™ is 84/100 with 5 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 Formosa Petrochemical (TPE:6505), the current Cyclically Adjusted Book per Share is NT$40.54 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 Formosa Petrochemical (TPE:6505) Overvalued in 2026?

Based on GuruFocus' analysis, Formosa Petrochemical stock appears to be overvalued. The current stock price of NT$81.30 is trading 50.5% above its estimated GF Value™ of NT$54.02. GuruFocus considers Formosa Petrochemical to be Significantly Overvalued.

Key valuation signals for TPE:6505:

  • Cyclically Adjusted Book per Share: NT$40.54
  • GF Value™: NT$54.02 vs. price of NT$81.30 (50.5% above fair value)
  • GF Score™: 84/100 with 5 warning signs

No single metric tells the full story. See the TPE:6505 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Formosa Petrochemical Business Description

Industry EnergyOil & Gas
Address No. 1-1, Formosa Plastics Industrial Park, Zhongxing Village, Mailiao Township, Yunlin County, Taipei, TWN, 638
Formosa Petrochemical Corp engages in the Operation of refinery of petroleum and integrated manufacture of hydrocarbon. The firm operates in two segments. The Petrochemical segment that derives majority revenue engages in producing and selling petroleum, and petrochemical products. The Public utility segment engages in producing and selling water, electricity, and steam. Its product offerings comprise gasoline, jet fuel, kerosene, fuel oil, asphalt, sulfur, lubricant, diesel, naphtha, and liquid petroleum gas.
84GF Score

Get the complete analysis for TPE:6505

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

NT$81.30
Price
NT$54.02
GF Value