F5 (FRA:FFV) Cyclically Adjusted PB Ratio: (As of Sep. 22, 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.

FRA:FFV F5 Inc FRA:FFV
86 GF Score
Price €376.00
GF Value €250.82
Valuation Significantly Overvalued
! 5 Warning Signs
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What is F5 Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


F5  (FRA:FFV) 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.


F5 Cyclically Adjusted PB Ratio Related Terms


F5 Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for F5'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.

F5 Cyclically Adjusted PB Ratio Chart

F5 Annual Data
Trend Sep16 Sep17 Sep18 Sep19 Sep20 Sep21 Sep22 Sep23 Sep24 Sep25
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 7.90 5.64 5.08 5.81 7.28

F5 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 7.17 7.57 5.96 6.36 9.09

FRA:FFV vs IOT, TOST, RBRK: Cyclically Adjusted PB Ratio Comparison

For the Software - Infrastructure subindustry, F5'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.


F5 Cyclically Adjusted PB Ratio vs Software Industry

For the Software industry and Technology sector, F5's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where F5's Cyclically Adjusted PB Ratio falls into.


FRA:FFV
86GF Score
F5 Inc FRA:FFV
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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F5 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.

F5's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, F5'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)
=59.347/333.9520*333.9520
=59.347

Current CPI (Jun. 2026) = 333.9520.

F5 Quarterly Data

Book Value per Share CPI Adj_Book
201609 16.148 241.428 22.337
201612 17.487 241.432 24.188
201703 17.276 243.801 23.664
201706 16.621 244.955 22.660
201709 16.614 246.819 22.479
201712 16.525 246.524 22.385
201803 16.320 249.554 21.839
201806 17.829 251.989 23.628
201809 18.380 252.439 24.315
201812 20.526 251.233 27.284
201903 21.892 254.202 28.760
201906 23.714 256.143 30.918
201909 26.766 256.759 34.813
201912 28.270 256.974 36.738
202003 30.037 258.115 38.862
202006 31.354 257.797 40.616
202009 31.156 260.280 39.975
202012 31.847 260.474 40.831
202103 28.448 264.877 35.867
202106 30.656 271.696 37.680
202109 33.577 274.310 40.877
202112 34.840 278.802 41.732
202203 35.631 287.504 41.387
202206 37.309 296.311 42.048
202209 42.103 296.808 47.372
202212 40.249 296.797 45.288
202303 41.490 301.836 45.905
202306 41.079 305.109 44.962
202309 44.671 307.789 48.468
202312 44.049 306.746 47.956
202403 46.341 312.332 49.549
202406 48.198 314.175 51.232
202409 48.266 315.301 51.121
202412 53.754 315.605 56.879
202503 52.970 319.799 55.314
202506 51.109 322.561 52.914
202509 52.996 324.800 54.489
202512 52.959 324.054 54.577
202603 55.812 330.213 56.444
202606 59.347 333.952 59.347

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 F5 (FRA:FFV) Overvalued in 2026?

Based on GuruFocus' analysis, F5 stock appears to be overvalued. The current stock price of €376.00 is trading 49.9% above its estimated GF Value™ of €250.82. GuruFocus considers F5 to be Significantly Overvalued.

Key valuation signals for FRA:FFV:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: €250.82 vs. price of €376.00 (49.9% above fair value)
  • GF Score™: 86/100 with 5 warning signs

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


F5 Business Description

Address 801 5th Avenue, Seattle, WA, USA, 98104
F5 is a market leader in the application delivery controller market. The company sells products for security, application performance, and automation. Its three customer verticals are enterprises, service providers, and government entities. Revenue is evenly split between its services business and products business with revenue trending toward products due to software adoption. The Seattle-based firm was incorporated in 1996, and went public in 1999.
86GF Score

Get the complete analysis for FRA:FFV

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

€376.00
Price
€250.82
GF Value