8x8 (STU:EGT) Cyclically Adjusted Book per Share: €1.88 (As of Mar. 2026)

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Director of Data and Quant Analytics at GuruFocus
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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:EGT 8x8 Inc STU:EGT
60 GF Score
Price €1.63
GF Value €1.72
Valuation Fairly Valued
! 5 Warning Signs
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What is 8x8 Cyclically Adjusted Book per Share?

8x8 STU:EGT +2.52% 60 Cyclically Adjusted Book per Share is €1.88 as of Mar. 2026. GuruFocus rates STU:EGT with a GF Score™ of 60/100 and a GF Value™ of €1.72 (Fairly Valued). The stock has 5 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.

8x8's adjusted book value per share for the three months ended in Mar. 2026 was €0.898. 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 €1.88 for the trailing ten years ended in Mar. 2026.

During the past 12 months, 8x8's average Cyclically Adjusted Book Growth Rate was -10.30% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was -8.60% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was -4.10% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 5.80% 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 8x8 was 42.80% per year. The lowest was -29.90% per year. And the median was 9.50% per year.

As of today (2026-08-01), 8x8's current stock price is €1.63. 8x8's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was €1.88. 8x8's Cyclically Adjusted PB Ratio of today is 0.87.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of 8x8 was 14.91. The lowest was 0.65. And the median was 6.57.


8x8  (STU:EGT) 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.

8x8's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=1.63/1.88
=0.87

* 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 8x8 was 14.91. The lowest was 0.65. And the median was 6.57.


Be Aware

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


8x8 Cyclically Adjusted Book per Share Related Terms


8x8 Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for 8x8'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.

8x8 Cyclically Adjusted Book per Share Chart

8x8 Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 2.57 2.62 2.47 2.21 1.88

8x8 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 2.21 1.94 2.07 1.90 1.88

STU:EGT vs AZ, DUOT, SVCO: Cyclically Adjusted Book per Share Comparison

For the Software - Application subindustry, 8x8'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.


8x8 Cyclically Adjusted PB Ratio vs Software Industry

For the Software industry and Technology sector, 8x8's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where 8x8's Cyclically Adjusted PB Ratio falls into.


STU:EGT
60GF Score
8x8 Inc STU:EGT
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

8x8 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, 8x8'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)
=0.898/330.2130*330.2130
=0.898

Current CPI (Mar. 2026) = 330.2130.

8x8 Quarterly Data

Book Value per Share CPI Adj_Book
201606 2.749 241.018 3.766
201609 2.768 241.428 3.786
201612 2.943 241.432 4.025
201703 2.949 243.801 3.994
201706 3.024 244.955 4.077
201709 2.801 246.819 3.747
201712 2.021 246.524 2.707
201803 1.911 249.554 2.529
201806 2.314 251.989 3.032
201809 2.165 252.439 2.832
201812 2.093 251.233 2.751
201903 2.296 254.202 2.983
201906 2.109 256.143 2.719
201909 2.173 256.759 2.795
201912 1.960 256.974 2.519
202003 1.673 258.115 2.140
202006 1.529 257.797 1.959
202009 1.398 260.280 1.774
202012 1.284 260.474 1.628
202103 1.235 264.877 1.540
202106 1.176 271.696 1.429
202109 1.143 274.310 1.376
202112 0.923 278.802 1.093
202203 1.405 287.504 1.614
202206 1.056 296.311 1.177
202209 0.768 296.808 0.854
202212 0.753 296.797 0.838
202303 0.814 301.836 0.891
202306 0.812 305.109 0.879
202309 0.849 307.789 0.911
202312 0.816 306.746 0.878
202403 0.749 312.332 0.792
202406 0.759 314.175 0.798
202409 0.758 315.301 0.794
202412 0.821 315.605 0.859
202503 0.841 319.799 0.868
202506 0.819 322.561 0.838
202509 0.819 324.800 0.833
202512 0.876 324.054 0.893
202603 0.898 330.213 0.898

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 €1.88 mean?
8x8 (STU:EGT) has a Cyclically Adjusted Book per Share of €1.88 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 8x8 and its competitors.
Is 8x8's Cyclically Adjusted Book per Share too high?
8x8's current Cyclically Adjusted Book per Share is €1.88. Overall, 8x8 has a GF Score™ of 60/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does 8x8's Cyclically Adjusted Book per Share compare to AZ and DUOT?
8x8's Cyclically Adjusted Book per Share of €1.88 can be compared against companies in the Software 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 Software company?
A good Cyclically Adjusted Book per Share depends on the Software 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 8x8 and its competitors. 8x8's current Cyclically Adjusted Book per Share is €1.88. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is 8x8 stock overvalued right now?
Based on GuruFocus' analysis, 8x8 (STU:EGT) is currently considered Fairly Valued. The stock's GF Value™ is €1.72, compared to a current price of €1.63 — trading 5.2% below its estimated fair value. The current Cyclically Adjusted Book per Share is €1.88. 8x8's overall GF Score™ is 60/100 with 5 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 8x8 (STU:EGT), the current Cyclically Adjusted Book per Share is €1.88 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 8x8 (STU:EGT) Overvalued in 2026?

Based on GuruFocus' analysis, 8x8 stock appears to be undervalued. The current stock price of €1.63 is trading 5.2% below its estimated GF Value™ of €1.72. GuruFocus considers 8x8 to be Fairly Valued.

Key valuation signals for STU:EGT:

  • Cyclically Adjusted Book per Share: €1.88
  • GF Value™: €1.72 vs. price of €1.63 (5.2% below fair value)
  • GF Score™: 60/100 with 5 warning signs

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


8x8 Business Description

Other Exchanges EGHT:USA0IFS:UK
Address 675 Creekside Way, Campbell, CA, USA, 95008
8x8 Inc provides contact-center-as-a-service and unified-communications-as-a-service software applications to approximately 2.5 million users. The company's unified platform enables omnichannel communication to assist employees in communicating across voice, video, text, chat, and contact centers. The Company also generates revenue from sales of hardware and professional services, which are complementary to the delivery of its integrated technology platform. Geographically, it derives a majority of revenue from the United States.
60GF Score

Get the complete analysis for STU:EGT

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

€1.63
Price
€1.72
GF Value