Targa Resources (STU:TAR) Cyclically Adjusted Book per Share: €18.51 (As of Mar. 2026)


STU:TAR Targa Resources Corp STU:TAR
61 GF Score
Price €240.10
GF Value €148.89
Valuation Significantly Overvalued
! 9 Warning Signs
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What is Targa Resources Cyclically Adjusted Book per Share?

Targa Resources STU:TAR +4.80% 61 Cyclically Adjusted Book per Share is €18.51 as of Mar. 2026. GuruFocus rates STU:TAR with a GF Score™ of 61/100 and a GF Value™ of €148.89 (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.

Targa Resources's adjusted book value per share for the three months ended in Mar. 2026 was €12.635. 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 €18.51 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Targa Resources's average Cyclically Adjusted Book Growth Rate was -7.70% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 1.60% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 5.50% 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 Targa Resources was 8.70% per year. The lowest was 1.60% per year. And the median was 7.70% per year.

As of today (2026-07-08), Targa Resources's current stock price is €240.10. Targa Resources's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was €18.51. Targa Resources's Cyclically Adjusted PB Ratio of today is 12.97.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Targa Resources was 12.88. The lowest was 0.38. And the median was 3.52.


Targa Resources  (STU:TAR) 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.

Targa Resources's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=240.10/18.51
=12.97

* 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 Targa Resources was 12.88. The lowest was 0.38. And the median was 3.52.


Be Aware

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


Targa Resources Cyclically Adjusted Book per Share Related Terms


Targa Resources Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Targa Resources'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.

Targa Resources Cyclically Adjusted Book per Share Chart

Targa Resources 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 16.60 19.41 19.91 22.33 18.41

Targa Resources 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 21.47 19.41 19.22 18.41 18.51

STU:TAR vs MPLX, OKE, ET: Cyclically Adjusted Book per Share Comparison

For the Oil & Gas Midstream subindustry, Targa Resources'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.


Targa Resources Cyclically Adjusted PB Ratio vs Oil & Gas Industry

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

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


STU:TAR
61GF Score
Targa Resources Corp STU:TAR
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Targa Resources 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, Targa Resources'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)
=12.635/330.2130*330.2130
=12.635

Current CPI (Mar. 2026) = 330.2130.

Targa Resources Quarterly Data

Book Value per Share CPI Adj_Book
201606 28.311 241.018 38.788
201609 27.301 241.428 37.341
201612 26.936 241.432 36.841
201703 27.055 243.801 36.644
201706 26.674 244.955 35.958
201709 23.329 246.819 31.211
201712 23.926 246.524 32.048
201803 22.572 249.554 29.868
201806 23.604 251.989 30.931
201809 22.731 252.439 29.734
201812 23.054 251.233 30.301
201903 21.913 254.202 28.465
201906 21.099 256.143 27.200
201909 20.745 256.759 26.680
201912 19.020 256.974 24.441
202003 11.749 258.115 15.031
202006 11.111 257.797 14.232
202009 10.307 260.280 13.076
202012 9.565 260.474 12.126
202103 8.437 264.877 10.518
202106 7.936 271.696 9.645
202109 8.112 274.310 9.765
202112 7.801 278.802 9.240
202203 6.753 287.504 7.756
202206 8.624 296.311 9.611
202209 10.644 296.808 11.842
202212 11.133 296.797 12.386
202303 10.535 301.836 11.525
202306 11.021 305.109 11.928
202309 10.526 307.789 11.293
202312 11.286 306.746 12.149
202403 11.198 312.332 11.839
202406 10.459 314.175 10.993
202409 10.622 315.301 11.124
202412 11.369 315.605 11.895
202503 10.427 319.799 10.767
202506 10.412 322.561 10.659
202509 10.734 324.800 10.913
202512 12.205 324.054 12.437
202603 12.635 330.213 12.635

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 €18.51 mean?
Targa Resources (STU:TAR) has a Cyclically Adjusted Book per Share of €18.51 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 Targa Resources and its competitors.
Is Targa Resources' Cyclically Adjusted Book per Share too high?
Targa Resources' current Cyclically Adjusted Book per Share is €18.51. Overall, Targa Resources has a GF Score™ of 61/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Targa Resources' Cyclically Adjusted Book per Share compare to MPLX and OKE?
Targa Resources' Cyclically Adjusted Book per Share of €18.51 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 Targa Resources and its competitors. Targa Resources's current Cyclically Adjusted Book per Share is €18.51. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Targa Resources stock overvalued right now?
Based on GuruFocus' analysis, Targa Resources (STU:TAR) is currently considered Significantly Overvalued. The stock's GF Value™ is €148.89, compared to a current price of €240.10 — trading 61.3% above its estimated fair value. The current Cyclically Adjusted Book per Share is €18.51. Targa Resources' overall GF Score™ is 61/100 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 Targa Resources (STU:TAR), the current Cyclically Adjusted Book per Share is €18.51 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 Targa Resources (STU:TAR) Overvalued in 2026?

Based on GuruFocus' analysis, Targa Resources stock appears to be overvalued. The current stock price of €240.10 is trading 61.3% above its estimated GF Value™ of €148.89. GuruFocus considers Targa Resources to be Significantly Overvalued.

Key valuation signals for STU:TAR:

  • Cyclically Adjusted Book per Share: €18.51
  • GF Value™: €148.89 vs. price of €240.10 (61.3% above fair value)
  • GF Score™: 61/100 with 9 warning signs

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


Targa Resources Business Description

Industry EnergyOil & Gas
Other Exchanges TRGP:USA1TRGP:Italy0LD9:UK
Address 811 Louisiana Street, Suite 2100, Houston, TX, USA, 77002
Targa Resources Corp is a midstream firm that mainly operates gathering and processing assets with substantial positions in the Permian, Stack, Scoop, and Bakken plays. It has fractionation capacity at Mont Belvieu and operates a liquefied petroleum gas export terminal. The Grand Prix natural gas liquids pipeline is another important asset. It has two operating segments: Gathering and Processing, and, Logistics and Transportation (also referred to as the Downstream Business).
61GF Score

Get the complete analysis for STU:TAR

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

€240.10
Price
€148.89
GF Value