Formosa Petrochemical (TPE:6505) Cyclically Adjusted PB Ratio: (As of Sep. 21, 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
75 GF Score
Price NT$86.50
GF Value NT$55.80
Valuation Significantly Overvalued
! 6 Warning Signs
View Full Analysis

What is Formosa Petrochemical Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Formosa Petrochemical  (TPE:6505) 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.


Formosa Petrochemical Cyclically Adjusted PB Ratio Related Terms


Formosa Petrochemical Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Formosa Petrochemical'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.

Formosa Petrochemical Cyclically Adjusted PB Ratio Chart

Formosa Petrochemical Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 2.75 2.13 2.06 0.86 1.16

Formosa Petrochemical Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PB Ratio 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 0.90 1.01 1.19 1.34 1.32

TPE:6505 vs MPC, VLO, PSX: Cyclically Adjusted PB Ratio 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
75GF Score
Formosa Petrochemical Corp TPE:6505
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Formosa Petrochemical 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.

Formosa Petrochemical's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, Formosa Petrochemical's adjusted Book Value per Share data for the three months ended in Jun. 2026 was:

Adj_Book=Book Value per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=51.692/333.9520*333.9520
=51.692

Current CPI (Jun. 2026) = 333.9520.

Formosa Petrochemical Quarterly Data

Book Value per Share CPI Adj_Book
201609 29.251 241.428 40.461
201612 32.448 241.432 44.883
201703 34.687 243.801 47.513
201706 30.314 244.955 41.328
201709 33.821 246.819 45.761
201712 36.127 246.524 48.939
201803 39.385 249.554 52.705
201806 35.988 251.989 47.694
201809 36.792 252.439 48.672
201812 35.761 251.233 47.535
201903 37.437 254.202 49.182
201906 33.474 256.143 43.642
201909 34.518 256.759 44.896
201912 35.062 256.974 45.565
202003 31.866 258.115 41.229
202006 28.498 257.797 36.917
202009 29.815 260.280 38.254
202012 32.818 260.474 42.076
202103 35.314 264.877 44.523
202106 35.576 271.696 43.728
202109 36.952 274.310 44.986
202112 37.977 278.802 45.489
202203 39.406 287.504 45.772
202206 36.186 296.311 40.783
202209 34.788 296.808 39.142
202212 33.307 296.797 37.477
202303 33.550 301.836 37.120
202306 33.437 305.109 36.598
202309 35.238 307.789 38.233
202312 35.820 306.746 38.997
202403 34.221 312.332 36.590
202406 34.871 314.175 37.066
202409 33.051 315.301 35.006
202412 31.729 315.605 33.573
202503 31.645 319.799 33.045
202506 30.640 322.561 31.722
202509 32.772 324.800 33.695
202512 37.922 324.054 39.080
202603 39.954 330.213 40.406
202606 51.692 333.952 51.692

Add all the adjusted book value per share together and divide the count will get our 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.

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$86.50 is trading 55% above its estimated GF Value™ of NT$55.80. GuruFocus considers Formosa Petrochemical to be Significantly Overvalued.

Key valuation signals for TPE:6505:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: NT$55.80 vs. price of NT$86.50 (55% above fair value)
  • GF Score™: 75/100 with 6 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.
75GF Score

Get the complete analysis for TPE:6505

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

NT$86.50
Price
NT$55.80
GF Value