CarParts.com (STU:ZZF0) Cyclically Adjusted Book per Share: €13.36 (As of Jun. 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.

STU:ZZF0 CarParts.com Inc STU:ZZF0
52 GF Score
Price €5.20
GF Value €5.63
! 3 Warning Signs
View Full Analysis

What is CarParts.com Cyclically Adjusted Book per Share?

CarParts.com STU:ZZF0 52 Cyclically Adjusted Book per Share is €13.36 as of Jun. 2026. GuruFocus rates STU:ZZF0 with a GF Score™ of 52/100 and a GF Value™ of €5.63. The stock has 3 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.

CarParts.com's adjusted book value per share for the three months ended in Jun. 2026 was €6.419. 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 €13.36 for the trailing ten years ended in Jun. 2026.

During the past 12 months, CarParts.com's average Cyclically Adjusted Book Growth Rate was 3.40% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 9.30% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 7.70% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was -2.90% 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 CarParts.com was 9.90% per year. The lowest was -12.10% per year. And the median was -4.90% per year.

As of today (2026-08-18), CarParts.com's current stock price is €5.20. CarParts.com's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 was €13.36. CarParts.com's Cyclically Adjusted PB Ratio of today is 0.39.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of CarParts.com was 17.64. The lowest was 0.26. And the median was 1.58.


CarParts.com  (STU:ZZF0) 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.

CarParts.com's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=5.20/13.36
=0.39

* 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 CarParts.com was 17.64. The lowest was 0.26. And the median was 1.58.


Be Aware

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


CarParts.com Cyclically Adjusted Book per Share Related Terms


CarParts.com Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for CarParts.com'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.

CarParts.com Cyclically Adjusted Book per Share Chart

CarParts.com 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 10.19 10.81 12.99 12.22 11.43

CarParts.com Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
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 13.65 13.20 11.43 13.92 13.36

STU:ZZF0 vs SYPR, MKDW, GTEC: Cyclically Adjusted Book per Share Comparison

For the Auto Parts subindustry, CarParts.com'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.


CarParts.com Cyclically Adjusted PB Ratio vs Vehicles & Parts Industry

For the Vehicles & Parts industry and Consumer Cyclical sector, CarParts.com's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


STU:ZZF0
52GF Score
CarParts.com Inc STU:ZZF0
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

CarParts.com 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, CarParts.com'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)
=6.419/333.9520*333.9520
=6.419

Current CPI (Jun. 2026) = 333.9520.

CarParts.com Quarterly Data

Book Value per Share CPI Adj_Book
201609 6.287 241.428 8.696
201612 6.257 241.432 8.655
201703 5.235 243.801 7.171
201706 11.327 244.955 15.442
201709 10.821 246.819 14.641
201712 9.836 246.524 13.324
201803 9.756 249.554 13.055
201806 10.174 251.989 13.483
201809 10.425 252.439 13.791
201812 9.752 251.233 12.963
201903 9.264 254.202 12.170
201906 8.960 256.143 11.682
201909 9.033 256.759 11.749
201912 3.080 256.974 4.003
202003 3.547 258.115 4.589
202006 4.537 257.797 5.877
202009 15.867 260.280 20.358
202012 15.060 260.474 19.308
202103 14.861 264.877 18.736
202106 15.714 271.696 19.315
202109 16.095 274.310 19.594
202112 16.781 278.802 20.100
202203 18.194 287.504 21.133
202206 19.770 296.311 22.281
202209 21.677 296.808 24.390
202212 19.932 296.797 22.427
202303 20.384 301.836 22.553
202306 20.261 305.109 22.176
202309 20.252 307.789 21.973
202312 19.239 306.746 20.945
202403 19.005 312.332 20.321
202406 18.108 314.175 19.248
202409 16.339 315.301 17.306
202412 15.156 315.605 16.037
202503 12.349 319.799 12.896
202506 9.847 322.561 10.195
202509 8.336 324.800 8.571
202512 6.922 324.054 7.133
202603 6.723 330.213 6.799
202606 6.419 333.952 6.419

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 €13.36 mean?
CarParts.com (STU:ZZF0) has a Cyclically Adjusted Book per Share of €13.36 as of Jun. 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 CarParts.com and its competitors.
Is CarParts.com's Cyclically Adjusted Book per Share too high?
CarParts.com's current Cyclically Adjusted Book per Share is €13.36. Overall, CarParts.com has a GF Score™ of 52/100, reflecting its overall financial health beyond just this single metric.
How does CarParts.com's Cyclically Adjusted Book per Share compare to SYPR and MKDW?
CarParts.com's Cyclically Adjusted Book per Share of €13.36 can be compared against companies in the Vehicles & Parts 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 Vehicles & Parts company?
A good Cyclically Adjusted Book per Share depends on the Vehicles & Parts 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 CarParts.com and its competitors. CarParts.com's current Cyclically Adjusted Book per Share is €13.36. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is CarParts.com stock overvalued right now?
CarParts.com (STU:ZZF0) has a current Cyclically Adjusted Book per Share of €13.36. The stock's GF Value™ is €5.63, compared to a current price of €5.20 — trading 7.6% below its estimated fair value. The current Cyclically Adjusted Book per Share is €13.36. CarParts.com's overall GF Score™ is 52/100 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 Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For CarParts.com (STU:ZZF0), the current Cyclically Adjusted Book per Share is €13.36 as of Jun. 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 CarParts.com (STU:ZZF0) Overvalued in 2026?

Based on GuruFocus' analysis, CarParts.com stock appears to be undervalued. The current stock price of €5.20 is trading 7.6% below its estimated GF Value™ of €5.63.

Key valuation signals for STU:ZZF0:

  • Cyclically Adjusted Book per Share: €13.36
  • GF Value™: €5.63 vs. price of €5.20 (7.6% below fair value)
  • GF Score™: 52/100 with 3 warning signs

No single metric tells the full story. See the STU:ZZF0 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


CarParts.com Business Description

Other Exchanges PRTS:USA
Address 4910 Airport Plaza Drive, Suite 300, Long Beach, CA, USA, 90815
CarParts.com Inc is an online provider of automotive aftermarket parts and repair information. It serves as an end-to-end solution for automotive repair and maintenance resources, offering a seamless online shopping experience that empowers drivers along every part of their journey. The company principally sells its products to individual consumers through its network of websites and online marketplaces. Its products consist of collision parts serving the body repair market, engine parts to serve the replacement parts market, and performance parts and accessories.
52GF Score

Get the complete analysis for STU:ZZF0

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

€5.20
Price
€5.63
GF Value