Quest Diagnostics (MEX:DGX) Cyclically Adjusted Book per Share: MXN956.60 (As of Jun. 2026)

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MEX:DGX Quest Diagnostics Inc MEX:DGX
70 GF Score
Price MXN4,051.76
GF Value MXN3,149.98
Valuation Modestly Overvalued
! 7 Warning Signs
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What is Quest Diagnostics Cyclically Adjusted Book per Share?

Quest Diagnostics MEX:DGX 70 Cyclically Adjusted Book per Share is MXN956.60 as of Jun. 2026. GuruFocus rates MEX:DGX with a GF Score™ of 70/100 and a GF Value™ of MXN3,149.98 (Modestly Overvalued). The stock has 7 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.

Quest Diagnostics's adjusted book value per share for the three months ended in Jun. 2026 was MXN1,192.243. 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 MXN956.60 for the trailing ten years ended in Jun. 2026.

During the past 12 months, Quest Diagnostics's average Cyclically Adjusted Book Growth Rate was 7.60% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 7.50% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 9.50% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 9.10% 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 Quest Diagnostics was 13.80% per year. The lowest was 7.50% per year. And the median was 9.10% per year.

As of today (2026-09-06), Quest Diagnostics's current stock price is MXN4051.76. Quest Diagnostics's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 was MXN956.60. Quest Diagnostics's Cyclically Adjusted PB Ratio of today is 4.24.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Quest Diagnostics was 4.41. The lowest was 2.20. And the median was 3.31.


Quest Diagnostics  (MEX:DGX) 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.

Quest Diagnostics's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=4051.76/956.60
=4.24

* 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 Quest Diagnostics was 4.41. The lowest was 2.20. And the median was 3.31.


Be Aware

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


Quest Diagnostics Cyclically Adjusted Book per Share Related Terms


Quest Diagnostics Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Quest Diagnostics'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.

Quest Diagnostics Cyclically Adjusted Book per Share Chart

Quest Diagnostics 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 828.99 721.66 863.38 980.54 1,025.85

Quest Diagnostics 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 1,014.55 994.37 1,025.85 1,067.36 956.60

MEX:DGX vs LH, MTD, GH: Cyclically Adjusted Book per Share Comparison

For the Diagnostics & Research subindustry, Quest Diagnostics'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.


Quest Diagnostics Cyclically Adjusted PB Ratio vs Medical Diagnostics & Research Industry

For the Medical Diagnostics & Research industry and Healthcare sector, Quest Diagnostics's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


MEX:DGX
70GF Score
Quest Diagnostics Inc MEX:DGX
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Quest Diagnostics 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, Quest Diagnostics'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)
=1192.243/333.9520*333.9520
=1,192.243

Current CPI (Jun. 2026) = 333.9520.

Quest Diagnostics Quarterly Data

Book Value per Share CPI Adj_Book
201609 648.643 241.428 897.227
201612 696.463 241.432 963.357
201703 636.338 243.801 871.639
201706 624.287 244.955 851.103
201709 639.717 246.819 865.552
201712 715.896 246.524 969.783
201803 671.934 249.554 899.179
201806 754.627 251.989 1,000.080
201809 731.283 252.439 967.416
201812 758.638 251.233 1,008.421
201903 765.787 254.202 1,006.035
201906 776.751 256.143 1,012.706
201909 819.659 256.759 1,066.084
201912 799.919 256.974 1,039.539
202003 989.891 258.115 1,280.732
202006 1,004.416 257.797 1,301.127
202009 1,047.277 260.280 1,343.708
202012 1,010.902 260.474 1,296.071
202103 1,052.477 264.877 1,326.943
202106 962.504 271.696 1,183.051
202109 1,068.555 274.310 1,300.886
202112 1,110.859 278.802 1,330.599
202203 1,085.235 287.504 1,260.561
202206 1,102.363 296.311 1,242.398
202209 1,100.149 296.808 1,237.827
202212 1,035.044 296.797 1,164.618
202303 974.734 301.836 1,078.448
202306 956.538 305.109 1,046.963
202309 999.254 307.789 1,084.194
202312 960.709 306.746 1,045.916
202403 961.686 312.332 1,028.255
202406 1,091.205 314.175 1,159.895
202409 1,193.686 315.301 1,264.296
202412 1,277.945 315.605 1,352.236
202503 1,265.917 319.799 1,321.941
202506 1,219.129 322.561 1,262.182
202509 1,201.395 324.800 1,235.247
202512 1,171.068 324.054 1,206.837
202603 1,196.656 330.213 1,210.206
202606 1,192.243 333.952 1,192.243

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 MXN956.60 mean?
Quest Diagnostics (MEX:DGX) has a Cyclically Adjusted Book per Share of MXN956.60 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 Quest Diagnostics and its competitors.
Is Quest Diagnostics' Cyclically Adjusted Book per Share too high?
Quest Diagnostics' current Cyclically Adjusted Book per Share is MXN956.60. Overall, Quest Diagnostics has a GF Score™ of 70/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Quest Diagnostics' Cyclically Adjusted Book per Share compare to LH and MTD?
Quest Diagnostics' Cyclically Adjusted Book per Share of MXN956.60 can be compared against companies in the Medical Diagnostics & Research 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 Medical Diagnostics & Research company?
A good Cyclically Adjusted Book per Share depends on the Medical Diagnostics & Research 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 Quest Diagnostics and its competitors. Quest Diagnostics's current Cyclically Adjusted Book per Share is MXN956.60. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Quest Diagnostics stock overvalued right now?
Based on GuruFocus' analysis, Quest Diagnostics (MEX:DGX) is currently considered Modestly Overvalued. The stock's GF Value™ is MXN3,149.98, compared to a current price of MXN4,051.76 — trading 28.6% above its estimated fair value. The current Cyclically Adjusted Book per Share is MXN956.60. Quest Diagnostics' overall GF Score™ is 70/100 with 7 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 Quest Diagnostics (MEX:DGX), the current Cyclically Adjusted Book per Share is MXN956.60 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 Quest Diagnostics (MEX:DGX) Overvalued in 2026?

Based on GuruFocus' analysis, Quest Diagnostics stock appears to be overvalued. The current stock price of MXN4,051.76 is trading 28.6% above its estimated GF Value™ of MXN3,149.98. GuruFocus considers Quest Diagnostics to be Modestly Overvalued.

Key valuation signals for MEX:DGX:

  • Cyclically Adjusted Book per Share: MXN956.60
  • GF Value™: MXN3,149.98 vs. price of MXN4,051.76 (28.6% above fair value)
  • GF Score™: 70/100 with 7 warning signs

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


Quest Diagnostics Business Description

Address 500 Plaza Drive, Secaucus, NJ, USA, 07094
Quest Diagnostics is a leading independent provider of diagnostic testing, information, and services in the US. The company generates over 97% of its revenue through clinical testing, anatomic pathology, esoteric testing, and substance abuse testing with specimens collected at its national network of roughly 2,400 patient service centers, as well as multiple doctors offices and hospitals. The firm also runs a much smaller diagnostic solutions segment that provides clinical trials testing, risk-assessment services, and information technology solutions.
70GF Score

Get the complete analysis for MEX:DGX

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

MXN4,051.76
Price
MXN3,149.98
GF Value