CoStar Group (BSP:C1GP34) Cyclically Adjusted PB Ratio: (As of Sep. 20, 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.

BSP:C1GP34 CoStar Group Inc BSP:C1GP34
71 GF Score
Price R$1.51
GF Value R$5.42
Valuation Significantly Undervalued
! 2 Warning Signs
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What is CoStar Group Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


CoStar Group  (BSP:C1GP34) 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.


CoStar Group Cyclically Adjusted PB Ratio Related Terms


CoStar Group Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for CoStar Group'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.

CoStar Group Cyclically Adjusted PB Ratio Chart

CoStar Group 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 13.58 9.45 8.11 6.75 5.01

CoStar Group 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 6.84 6.56 5.31 2.86 1.94

BSP:C1GP34 vs JLL, COMP, BEKE: Cyclically Adjusted PB Ratio Comparison

For the Real Estate Services subindustry, CoStar Group'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.


CoStar Group Cyclically Adjusted PB Ratio vs Real Estate Industry

For the Real Estate industry and Real Estate sector, CoStar Group's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


BSP:C1GP34
71GF Score
CoStar Group Inc BSP:C1GP34
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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CoStar Group 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.

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

For example, CoStar Group'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)
=1.016/333.9520*333.9520
=1.016

Current CPI (Jun. 2026) = 333.9520.

CoStar Group Quarterly Data

Book Value per Share CPI Adj_Book
201609 0.161 241.428 0.223
201612 0.165 241.432 0.228
201703 0.163 243.801 0.223
201706 0.173 244.955 0.236
201709 0.154 246.819 0.208
201712 0.244 246.524 0.331
201803 0.256 249.554 0.343
201806 0.301 251.989 0.399
201809 0.321 252.439 0.425
201812 0.321 251.233 0.427
201903 0.333 254.202 0.437
201906 0.335 256.143 0.437
201909 0.375 256.759 0.488
201912 0.373 256.974 0.485
202003 0.489 258.115 0.633
202006 0.728 257.797 0.943
202009 0.760 260.280 0.975
202012 0.708 260.474 0.908
202103 0.779 264.877 0.982
202106 0.702 271.696 0.863
202109 0.773 274.310 0.941
202112 0.806 278.802 0.965
202203 0.696 287.504 0.808
202206 0.777 296.311 0.876
202209 0.892 296.808 1.004
202212 0.918 296.797 1.033
202303 0.866 301.836 0.958
202306 0.840 305.109 0.919
202309 0.884 307.789 0.959
202312 0.874 306.746 0.952
202403 0.898 312.332 0.960
202406 1.004 314.175 1.067
202409 0.996 315.301 1.055
202412 1.140 315.605 1.206
202503 1.158 319.799 1.209
202506 1.109 322.561 1.148
202509 1.082 324.800 1.112
202512 1.098 324.054 1.132
202603 1.020 330.213 1.032
202606 1.016 333.952 1.016

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 CoStar Group (BSP:C1GP34) Overvalued in 2026?

Based on GuruFocus' analysis, CoStar Group stock appears to be undervalued. The current stock price of R$1.51 is trading 72.1% below its estimated GF Value™ of R$5.42. GuruFocus considers CoStar Group to be Significantly Undervalued.

Key valuation signals for BSP:C1GP34:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: R$5.42 vs. price of R$1.51 (72.1% below fair value)
  • GF Score™: 71/100 with 2 warning signs

No single metric tells the full story. See the BSP:C1GP34 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


CoStar Group Business Description

Address 1201 Wilson Boulevard, Arlington, VA, USA, 22209
CoStar Group is a global provider of proprietary information, analytics, and online marketplaces serving both commercial and residential real estate. The firm operates through a diverse portfolio of brands, including CoStar Suite for commercial real estate research, LoopNet for commercial listings, Apartments.com for multifamily rentals, and Homes.com for residential brokerage. It primarily sells high-margin software-as-a-service subscriptions that provide institutional clients with forensic property data and premium advertising visibility. With operations across North America, Europe, and Asia-Pacific, CoStar maintains the industry's most comprehensive centralized real estate database, functioning as a critical information utility for brokers, lenders, and owners worldwide.
71GF Score

Get the complete analysis for BSP:C1GP34

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

R$1.51
Price
R$5.42
GF Value