Firefly AB (OSTO:FIRE) Cyclically Adjusted Book per Share: kr16.85 (As of Mar. 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
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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.
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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.

OSTO:FIRE Firefly AB OSTO:FIRE
82 GF Score
Price kr160.00
GF Value kr190.02
Valuation Modestly Undervalued
! 2 Warning Signs
View Full Analysis

What is Firefly AB Cyclically Adjusted Book per Share?

Firefly AB OSTO:FIRE 82 Cyclically Adjusted Book per Share is kr16.85 as of Mar. 2026. GuruFocus rates OSTO:FIRE with a GF Score™ of 82/100 and a GF Value™ of kr190.02 (Modestly Undervalued). The stock has 2 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.

Firefly AB's adjusted book value per share for the three months ended in Mar. 2026 was kr32.905. 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 kr16.85 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Firefly AB's average Cyclically Adjusted Book Growth Rate was 14.90% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 18.60% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 21.30% 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 Firefly AB was 23.50% per year. The lowest was 7.40% per year. And the median was 18.60% per year.

As of today (2026-07-22), Firefly AB's current stock price is kr160.00. Firefly AB's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was kr16.85. Firefly AB's Cyclically Adjusted PB Ratio of today is 9.50.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Firefly AB was 18.41. The lowest was 5.98. And the median was 10.19.


Firefly AB  (OSTO:FIRE) 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.

Firefly AB's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=160.00/16.85
=9.50

* 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 Firefly AB was 18.41. The lowest was 5.98. And the median was 10.19.


Be Aware

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


Firefly AB Cyclically Adjusted Book per Share Related Terms


Firefly AB Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Firefly AB'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.

Firefly AB Cyclically Adjusted Book per Share Chart

Firefly AB 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 7.47 9.74 11.89 14.06 16.24

Firefly AB 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 14.66 15.22 15.69 16.24 16.85

OSTO:FIRE vs TT, JCI, CARR: Cyclically Adjusted Book per Share Comparison

For the Building Products & Equipment subindustry, Firefly AB'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.


Firefly AB Cyclically Adjusted PB Ratio vs Construction Industry

For the Construction industry and Industrials sector, Firefly AB's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


OSTO:FIRE
82GF Score
Firefly AB OSTO:FIRE
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Firefly AB 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, Firefly AB'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)
=32.905/133.5600*133.5600
=32.905

Current CPI (Mar. 2026) = 133.5600.

Firefly AB Quarterly Data

Book Value per Share CPI Adj_Book
201606 6.331 101.019 8.370
201609 6.452 101.138 8.520
201612 6.356 102.022 8.321
201703 6.602 102.022 8.643
201706 5.686 102.752 7.391
201709 6.732 103.279 8.706
201712 6.898 103.793 8.876
201803 7.722 103.962 9.920
201806 6.639 104.875 8.455
201809 7.639 105.679 9.654
201812 7.955 105.912 10.032
201903 8.243 105.886 10.397
201906 6.560 106.742 8.208
201909 7.669 107.214 9.554
201912 8.261 107.766 10.238
202003 8.866 106.563 11.112
202006 8.493 107.498 10.552
202009 10.352 107.635 12.845
202012 10.689 108.296 13.183
202103 11.301 108.360 13.929
202106 14.183 108.928 17.390
202109 15.232 110.338 18.438
202112 11.726 112.486 13.923
202203 17.881 114.825 20.798
202206 15.943 118.384 17.987
202209 17.183 122.296 18.766
202212 19.906 126.365 21.039
202303 21.042 127.042 22.122
202306 19.721 129.407 20.354
202309 22.793 130.224 23.377
202312 24.624 131.912 24.932
202403 27.023 132.205 27.300
202406 23.887 132.716 24.039
202409 26.622 132.304 26.875
202412 29.216 132.987 29.342
202503 31.360 132.825 31.534
202506 25.796 133.699 25.769
202509 28.580 133.480 28.597
202512 31.490 133.390 31.530
202603 32.905 133.560 32.905

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 kr16.85 mean?
Firefly AB (OSTO:FIRE) has a Cyclically Adjusted Book per Share of kr16.85 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 Firefly AB and its competitors.
Is Firefly AB's Cyclically Adjusted Book per Share too high?
Firefly AB's current Cyclically Adjusted Book per Share is kr16.85. Overall, Firefly AB has a GF Score™ of 82/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Firefly AB's Cyclically Adjusted Book per Share compare to TT and JCI?
Firefly AB's Cyclically Adjusted Book per Share of kr16.85 can be compared against companies in the Construction 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 Construction company?
A good Cyclically Adjusted Book per Share depends on the Construction 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 Firefly AB and its competitors. Firefly AB's current Cyclically Adjusted Book per Share is kr16.85. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Firefly AB stock overvalued right now?
Based on GuruFocus' analysis, Firefly AB (OSTO:FIRE) is currently considered Modestly Undervalued. The stock's GF Value™ is kr190.02, compared to a current price of kr160.00 — trading 15.8% below its estimated fair value. The current Cyclically Adjusted Book per Share is kr16.85. Firefly AB's overall GF Score™ is 82/100 with 2 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 Firefly AB (OSTO:FIRE), the current Cyclically Adjusted Book per Share is kr16.85 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 Firefly AB (OSTO:FIRE) Overvalued in 2026?

Based on GuruFocus' analysis, Firefly AB stock appears to be undervalued. The current stock price of kr160.00 is trading 15.8% below its estimated GF Value™ of kr190.02. GuruFocus considers Firefly AB to be Modestly Undervalued.

Key valuation signals for OSTO:FIRE:

  • Cyclically Adjusted Book per Share: kr16.85
  • GF Value™: kr190.02 vs. price of kr160.00 (15.8% below fair value)
  • GF Score™: 82/100 with 2 warning signs

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


Firefly AB Business Description

Address Heliosgatan 3, Stockholm, SWE, 120 30
Firefly AB is a supplier of spark detection, fire and dust explosion protection systems in Sweden. The company develops, manufactures and sells high-tech systems, which detect and minimise the risk of fires and dust explosions. It has two business areas: Industrial applications and Infra systems. Industrial applications include customized fire prevention systems, which monitor industrial processes in areas such as tissue, food, woodworking, bioenergy, and recycling. The business area of Infra systems includes early fire detection in subway-, train-, road or cable tunnel systems by means of multiple-gas detection.
82GF Score

Get the complete analysis for OSTO:FIRE

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

kr160.00
Price
kr190.02
GF Value