Aqua Metals (FRA:AQK) Cyclically Adjusted Book per Share: €1,609.78 (As of Jun. 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:AQK Aqua Metals Inc FRA:AQK
21 GF Score
Price €20.36
! 3 Warning Signs
View Full Analysis

What is Aqua Metals Cyclically Adjusted Book per Share?

Aqua Metals FRA:AQK 21 Cyclically Adjusted Book per Share is €1,609.78 as of Jun. 2026. GuruFocus rates FRA:AQK with a GF Score™ of 21/100. The stock has 3 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.

Aqua Metals's adjusted book value per share for the three months ended in Jun. 2026 was €2.334. 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 €1,609.78 for the trailing ten years ended in Jun. 2026.

During the past 12 months, Aqua Metals's average Cyclically Adjusted Book Growth Rate was -20.50% 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.

As of today (2026-08-19), Aqua Metals's current stock price is €20.36. Aqua Metals's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 was €1,609.78. Aqua Metals's Cyclically Adjusted PB Ratio of today is 0.01.

During the past 12 years, the highest Cyclically Adjusted PB Ratio of Aqua Metals was 0.27. The lowest was 0.01. And the median was 0.03.


Aqua Metals  (FRA:AQK) 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.

Aqua Metals's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=20.36/1609.78
=0.01

* 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 12 years, the highest Cyclically Adjusted PB Ratio of Aqua Metals was 0.27. The lowest was 0.01. And the median was 0.03.


Be Aware

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


Aqua Metals Cyclically Adjusted Book per Share Related Terms


Aqua Metals Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Aqua Metals'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.

Aqua Metals Cyclically Adjusted Book per Share Chart

Aqua Metals 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 0.00 0.00 0.00 221.11 1,083.70

Aqua Metals Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
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 1,206.19 866.03 1,083.70 1,165.28 1,609.78

FRA:AQK vs AWX, OCLN, DXST: Cyclically Adjusted Book per Share Comparison

For the Waste Management subindustry, Aqua Metals'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.


Aqua Metals Cyclically Adjusted PB Ratio vs Waste Management Industry

For the Waste Management industry and Industrials sector, Aqua Metals's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


FRA:AQK
21GF Score
Aqua Metals Inc FRA:AQK
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Aqua Metals 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, Aqua Metals'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)
=2.334/333.9520*333.9520
=2.334

Current CPI (Jun. 2026) = 333.9520.

Aqua Metals Quarterly Data

Book Value per Share CPI Adj_Book
201609 459.449 241.428 635.527
201612 607.045 241.432 839.673
201703 588.220 243.801 805.728
201706 502.079 244.955 684.494
201709 425.569 246.819 575.805
201712 361.051 246.524 489.095
201803 304.462 249.554 407.430
201806 316.603 251.989 419.583
201809 277.649 252.439 367.302
201812 225.790 251.233 300.132
201903 198.643 254.202 260.963
201906 201.352 256.143 262.517
201909 180.853 256.759 235.225
201912 153.897 256.974 199.998
202003 139.666 258.115 180.701
202006 126.017 257.797 163.243
202009 114.859 260.280 147.370
202012 79.491 260.474 101.915
202103 92.283 264.877 116.349
202106 76.700 271.696 94.275
202109 74.989 274.310 91.294
202112 69.224 278.802 82.917
202203 66.872 287.504 77.676
202206 64.108 296.311 72.252
202209 60.710 296.808 68.308
202212 49.736 296.797 55.962
202303 42.829 301.836 47.386
202306 34.763 305.109 38.049
202309 61.607 307.789 66.844
202312 44.343 306.746 48.276
202403 37.343 312.332 39.928
202406 35.009 314.175 37.213
202409 27.568 315.301 29.199
202412 20.069 315.605 21.236
202503 10.545 319.799 11.012
202506 4.316 322.561 4.468
202509 3.005 324.800 3.090
202512 4.205 324.054 4.333
202603 3.388 330.213 3.426
202606 2.334 333.952 2.334

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 €1,609.78 mean?
Aqua Metals (FRA:AQK) has a Cyclically Adjusted Book per Share of €1,609.78 as of Jun. 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 Aqua Metals and its competitors.
Is Aqua Metals' Cyclically Adjusted Book per Share too high?
Aqua Metals' current Cyclically Adjusted Book per Share is €1,609.78. Overall, Aqua Metals has a GF Score™ of 21/100, reflecting its overall financial health beyond just this single metric.
How does Aqua Metals' Cyclically Adjusted Book per Share compare to AWX and OCLN?
Aqua Metals' Cyclically Adjusted Book per Share of €1,609.78 can be compared against companies in the Waste Management 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 Waste Management company?
A good Cyclically Adjusted Book per Share depends on the Waste Management 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 Aqua Metals and its competitors. Aqua Metals's current Cyclically Adjusted Book per Share is €1,609.78. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Aqua Metals stock overvalued right now?
Aqua Metals (FRA:AQK) has a current Cyclically Adjusted Book per Share of €1,609.78. The current Cyclically Adjusted Book per Share is €1,609.78. Aqua Metals' overall GF Score™ is 21/100 with 3 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 Aqua Metals (FRA:AQK), the current Cyclically Adjusted Book per Share is €1,609.78 as of Jun. 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.

Aqua Metals Business Description

Other Exchanges AQMS:USA0HH6:UK
Address 5370 Kietzke Lane, Suite 201, Reno, NV, USA, 89511
Aqua Metals Inc is developing and seeking to commercialize proprietary recycling and refining technologies for the recovery of critical minerals and metals. Its patented and patent-pending AquaRefining process is an electro-hydrometallurgical method designed to recover high-purity materials from battery and other metal-bearing feedstocks using a closed-loop system powered by electricity. Its idea is to reduce CAPEX and OPEX costs, reduce emissions, hazardous waste, and reliance on conventional smelting and chemical-intensive refining processes. It has one operating segment: sustainable metals recycling. It focused on the development and commercialization of AquaRefining technology for the clean and efficient recovery of valuable metals from lead-acid and lithium-ion batteries.
21GF Score

Get the complete analysis for FRA:AQK

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

€20.36
Price