AAR (AIR) Cyclically Adjusted Book per Share: $35.24 (As of May. 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.

AIR AAR Corp AIR
85 GF Score
Price $145.25
GF Value $89.71
Valuation Significantly Overvalued
! 7 Warning Signs
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What is AAR Cyclically Adjusted Book per Share?

AAR AIR +1.30% 85 Cyclically Adjusted Book per Share is $35.24 as of May. 2026. GuruFocus rates AIR with a GF Score™ of 85/100 and a GF Value™ of $89.71 (Significantly Overvalued). The stock has 7 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.

AAR's adjusted book value per share for the three months ended in May. 2026 was $42.723. 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 $35.24 for the trailing ten years ended in May. 2026.

During the past 12 months, AAR's average Cyclically Adjusted Book Growth Rate was 6.00% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 3.90% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 4.60% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 5.10% 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 AAR was 8.60% per year. The lowest was 1.60% per year. And the median was 4.30% per year.

As of today (2026-08-16), AAR's current stock price is $145.25. AAR's Cyclically Adjusted Book per Share for the quarter that ended in May. 2026 was $35.24. AAR's Cyclically Adjusted PB Ratio of today is 4.12.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of AAR was 4.12. The lowest was 0.51. And the median was 1.68.


AAR  (NYSE:AIR) 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.

AAR's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=145.25/35.24
=4.12

* 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 AAR was 4.12. The lowest was 0.51. And the median was 1.68.


Be Aware

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


AAR Cyclically Adjusted Book per Share Related Terms


AAR Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for AAR'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.

AAR Cyclically Adjusted Book per Share Chart

AAR Annual Data
Trend May17 May18 May19 May20 May21 May22 May23 May24 May25 May26
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 30.09 31.40 32.45 33.26 35.24

AAR Quarterly Data
Aug21 Nov21 Feb22 May22 Aug22 Nov22 Feb23 May23 Aug23 Nov23 Feb24 May24 Aug24 Nov24 Feb25 May25 Aug25 Nov25 Feb26 May26
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 33.26 33.56 33.72 34.18 35.24

AIR vs VSEC, BETA, MRCY: Cyclically Adjusted Book per Share Comparison

For the Aerospace & Defense subindustry, AAR'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.


AAR Cyclically Adjusted PB Ratio vs Aerospace & Defense Industry

For the Aerospace & Defense industry and Industrials sector, AAR's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


AIR
85GF Score
AAR Corp AIR
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

AAR 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, AAR's adjusted Book Value per Share data for the three months ended in May. 2026 was:

Adj_Book= Book Value per Share /CPI of May. 2026 (Change)*Current CPI (May. 2026)
=42.723/335.1230*335.1230
=42.723

Current CPI (May. 2026) = 335.1230.

AAR Quarterly Data

Book Value per Share CPI Adj_Book
201608 25.121 240.849 34.954
201611 25.434 241.353 35.316
201702 25.804 243.603 35.498
201705 26.611 244.733 36.440
201708 26.708 245.519 36.455
201711 26.102 246.669 35.462
201802 26.421 248.991 35.561
201805 26.970 251.588 35.925
201808 26.515 252.146 35.241
201811 26.655 252.038 35.442
201902 25.648 252.776 34.003
201905 26.041 256.092 34.077
201908 26.008 256.558 33.972
201911 26.399 257.208 34.396
202002 26.478 258.678 34.303
202005 25.717 256.394 33.614
202008 25.229 259.918 32.529
202011 25.521 260.229 32.866
202102 26.399 263.014 33.637
202105 27.545 269.195 34.291
202108 27.859 273.567 34.128
202111 28.391 277.948 34.231
202202 28.914 283.716 34.153
202205 29.231 292.296 33.514
202208 29.544 296.171 33.430
202211 30.048 297.711 33.824
202302 30.763 300.840 34.269
202305 31.478 304.127 34.686
202308 31.786 307.026 34.695
202311 32.547 307.051 35.523
202402 32.969 310.326 35.603
202405 33.333 314.069 35.568
202408 33.703 314.796 35.879
202411 32.900 315.493 34.947
202502 32.755 319.082 34.402
202505 33.815 321.465 35.252
202508 34.595 323.976 35.785
202511 39.451 324.122 40.790
202602 41.329 326.785 42.384
202605 42.723 335.123 42.723

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 $35.24 mean?
AAR (AIR) has a Cyclically Adjusted Book per Share of $35.24 as of May. 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 AAR and its competitors.
Is AAR's Cyclically Adjusted Book per Share too high?
AAR's current Cyclically Adjusted Book per Share is $35.24. Overall, AAR has a GF Score™ of 85/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does AAR's Cyclically Adjusted Book per Share compare to VSEC and BETA?
AAR's Cyclically Adjusted Book per Share of $35.24 can be compared against companies in the Aerospace & Defense 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 an Aerospace & Defense company?
A good Cyclically Adjusted Book per Share depends on the Aerospace & Defense 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 AAR and its competitors. AAR's current Cyclically Adjusted Book per Share is $35.24. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is AAR stock overvalued right now?
Based on GuruFocus' analysis, AAR (AIR) is currently considered Significantly Overvalued. The stock's GF Value™ is $89.71, compared to a current price of $145.25 — trading 61.9% above its estimated fair value. The current Cyclically Adjusted Book per Share is $35.24. AAR's overall GF Score™ is 85/100 with 7 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 AAR (AIR), the current Cyclically Adjusted Book per Share is $35.24 as of May. 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 AAR (AIR) Overvalued in 2026?

Based on GuruFocus' analysis, AAR stock appears to be overvalued. The current stock price of $145.25 is trading 61.9% above its estimated GF Value™ of $89.71. GuruFocus considers AAR to be Significantly Overvalued.

Key valuation signals for AIR:

  • Cyclically Adjusted Book per Share: $35.24
  • GF Value™: $89.71 vs. price of $145.25 (61.9% above fair value)
  • GF Score™: 85/100 with 7 warning signs

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


AAR Business Description

Other Exchanges ARZ:Germany
Address 1100 N. Wood Dale Road, One AAR Place, Wood Dale, IL, USA, 60191
AAR Corp is engaged in providing products and services to aviation, government and defense market. It operates in segments namely: The parts supply segment majorly consists of sales and leasing of USM and aftermarket distribution of new, OEM-supplied replacement parts; Repair & Engineering segment provides airframe maintenance, component repair, and landing gear overhaul services; Integrated Solutions segment consists of its fleet management and operations of customer-owned aircraft, customized performance-based supply chain logistics programs in support of the U.S. Department of Defense, flight hour component inventory; and The Expeditionary Services segment consists of products and services supporting the movement of equipment and personnel by the U.S. and foreign governments and NGOs.
85GF Score

Get the complete analysis for AIR

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

$145.25
Price
$89.71
GF Value