Fortinet (FRA:FO8) Cyclically Adjusted PS Ratio: (As of Jul. 30, 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:FO8 Fortinet Inc FRA:FO8
88 GF Score
Price €134.00
GF Value €87.87
Valuation Significantly Overvalued
! 5 Warning Signs
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What is Fortinet Cyclically Adjusted PS Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Fortinet  (FRA:FO8) Cyclically Adjusted PS Ratio Explanation

Compared with the regular PS Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PS Ratio smoothed out the fluctuations of revenue 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 PS Ratio should give similar results to regular PS Ratio.


Fortinet Cyclically Adjusted PS Ratio Related Terms


Fortinet Cyclically Adjusted PS Ratio Historical Data

* Premium members only.

The historical data trend for Fortinet's Cyclically Adjusted PS 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.

Fortinet Cyclically Adjusted PS Ratio Chart

Fortinet Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PS Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 35.83 18.76 17.88 23.49 16.32

Fortinet Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PS 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 23.75 18.01 16.32 15.83 0.00

FRA:FO8 vs NET, SNPS, XYZ: Cyclically Adjusted PS Ratio Comparison

For the Software - Infrastructure subindustry, Fortinet's Cyclically Adjusted PS Ratio, along with its competitors' market caps and Cyclically Adjusted PS 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.


Fortinet Cyclically Adjusted PS Ratio vs Software Industry

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

* The bar in red indicates where Fortinet's Cyclically Adjusted PS Ratio falls into.


FRA:FO8
88GF Score
Fortinet Inc FRA:FO8
Cyclically Adjusted PS Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Fortinet Cyclically Adjusted PS Ratio Calculation

Like the Shiller PE Ratio, the Cyclically Adjusted PS Ratio takes the Revenue per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/S calculation. Because it considers this 10-year average, it's often referred to as the CAPS 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 PS Ratio.

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

For example, Fortinet's adjusted Revenue per Share data for the three months ended in Jun. 2026 was:

Adj_RevenuePerShare=Revenue per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=2.402/333.9520*333.9520
=2.402

Current CPI (Jun. 2026) = 333.9520.

Fortinet Quarterly Data

Revenue per Share CPI Adj_RevenuePerShare
201609 0.317 241.428 0.438
201612 0.388 241.432 0.537
201703 0.357 243.801 0.489
201706 0.360 244.955 0.491
201709 0.351 246.819 0.475
201712 0.401 246.524 0.543
201803 0.377 249.554 0.504
201806 0.435 251.989 0.576
201809 0.443 252.439 0.586
201812 0.511 251.233 0.679
201903 0.479 254.202 0.629
201906 0.527 256.143 0.687
201909 0.569 256.759 0.740
201912 0.635 256.974 0.825
202003 0.600 258.115 0.776
202006 0.663 257.797 0.859
202009 0.668 260.280 0.857
202012 0.743 260.474 0.953
202103 0.717 264.877 0.904
202106 0.796 271.696 0.978
202109 0.879 274.310 1.070
202112 1.021 278.802 1.223
202203 1.056 287.504 1.227
202206 1.203 296.311 1.356
202209 1.454 296.808 1.636
202212 1.530 296.797 1.722
202303 1.486 301.836 1.644
202306 1.499 305.109 1.641
202309 1.581 307.789 1.715
202312 1.680 306.746 1.829
202403 1.616 312.332 1.728
202406 1.731 314.175 1.840
202409 1.760 315.301 1.864
202412 2.045 315.605 2.164
202503 1.833 319.799 1.914
202506 1.829 322.561 1.894
202509 1.931 324.800 1.985
202512 2.176 324.054 2.242
202603 2.154 330.213 2.178
202606 2.402 333.952 2.402

Add all the adjusted revenue per share together and divide 10 will get our Cyclically Adjusted Revenue 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 Fortinet (FRA:FO8) Overvalued in 2026?

Based on GuruFocus' analysis, Fortinet stock appears to be overvalued. The current stock price of €134.00 is trading 52.5% above its estimated GF Value™ of €87.87. GuruFocus considers Fortinet to be Significantly Overvalued.

Key valuation signals for FRA:FO8:

  • Cyclically Adjusted PS Ratio:
  • GF Value™: €87.87 vs. price of €134.00 (52.5% above fair value)
  • GF Score™: 88/100 with 5 warning signs

No single metric tells the full story. See the FRA:FO8 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Fortinet Business Description

Address 909 Kifer Road, Sunnyvale, CA, USA, 94086
Fortinet is a platform-based cybersecurity vendor with product offerings covering network security, cloud security, zero-trust access, and security operations. The firm derives a majority of its revenue through sales of its subscriptions and support-based business. The California-based firm has more than 800,000 customers across the world.
88GF Score

Get the complete analysis for FRA:FO8

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

€134.00
Price
€87.87
GF Value