ERVFF (Boron One Holdings) Cyclically Adjusted PB Ratio: 0.27 (As of Jul. 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.

What is Boron One Holdings Cyclically Adjusted PB Ratio?

Boron One Holdings ERVFF -33.54% Cyclically Adjusted PB Ratio is 0.27 as of Jul. 22, 2026. The stock has 1 warning sign investors should review. Among 1,542 Metals & Mining companies, Boron One Holdings ranks better than 78.47% on this metric.

As of today (2026-07-22), Boron One Holdings's current share price is $0.0216. Boron One Holdings's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was $0.08. Boron One Holdings's Cyclically Adjusted PB Ratio for today is 0.27.

The historical rank and industry rank for Boron One Holdings's Cyclically Adjusted PB Ratio or its related term are showing as below:

ERVFF' s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0   Med: 0   Max: 0.38
Current: 0.38

During the past years, Boron One Holdings's highest Cyclically Adjusted PB Ratio was 0.38. The lowest was 0.00. And the median was 0.00.

ERVFF's Cyclically Adjusted PB Ratio is ranked better than
78.47% of 1542 companies
in the Metals & Mining industry
Industry Median: 1.38 vs ERVFF: 0.38

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.

Boron One Holdings's adjusted book value per share data for the three months ended in Mar. 2026 was $0.031. 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 $0.08 for the trailing ten years ended in Mar. 2026.

Shiller PE for Stocks: The True Measure of Stock Valuation


Boron One Holdings  (OTCPK:ERVFF) 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.


Boron One Holdings Cyclically Adjusted PB Ratio Related Terms


Boron One Holdings Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Boron One Holdings'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.

Boron One Holdings Cyclically Adjusted PB Ratio Chart

Boron One Holdings Annual Data
Trend Jun16 Jun17 Jun18 Jun19 Jun20 Jun21 Jun22 Jun23 Jun24 Jun25
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.86 0.52 0.41 0.66 0.35

Boron One Holdings Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
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 0.30 0.35 0.31 0.42 0.38

Boron One Holdings Cyclically Adjusted PB Ratio Competitor Comparison

For the Other Industrial Metals & Mining subindustry, Boron One Holdings'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.


Boron One Holdings Cyclically Adjusted PB Ratio vs Metals & Mining Industry

For the Metals & Mining industry and Basic Materials sector, Boron One Holdings's Cyclically Adjusted PB Ratio distribution charts can be found below:

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



Boron One Holdings 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.

Boron One Holdings's Cyclically Adjusted PB Ratio for today is calculated as

Cyclically Adjusted PB Ratio=Share Price/ Cyclically Adjusted Book per Share
=0.0216/0.08
=0.27

* 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.

Boron One Holdings's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 is calculated as:

For example, Boron One Holdings'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)
=0.031/132.2623*132.2623
=0.031

Current CPI (Mar. 2026) = 132.2623.

Boron One Holdings Quarterly Data

Book Value per Share CPI Adj_Book
201606 0.127 102.002 0.165
201609 0.122 101.765 0.159
201612 0.119 101.449 0.155
201703 0.117 102.634 0.151
201706 0.117 103.029 0.150
201709 0.123 103.345 0.157
201712 0.116 103.345 0.148
201803 0.105 105.004 0.132
201806 0.093 105.557 0.117
201809 0.092 105.636 0.115
201812 0.087 105.399 0.109
201903 0.084 106.979 0.104
201906 0.083 107.690 0.102
201909 0.084 107.611 0.103
201912 0.075 107.769 0.092
202003 0.069 107.927 0.085
202006 0.059 108.401 0.072
202009 0.057 108.164 0.070
202012 0.054 108.559 0.066
202103 0.055 110.298 0.066
202106 0.055 111.720 0.065
202109 0.051 112.905 0.060
202112 0.049 113.774 0.057
202203 0.048 117.646 0.054
202206 0.047 120.806 0.051
202209 0.044 120.648 0.048
202212 0.042 120.964 0.046
202303 0.040 122.702 0.043
202306 0.041 124.203 0.044
202309 0.039 125.230 0.041
202312 0.038 125.072 0.040
202403 0.037 126.258 0.039
202406 0.036 127.522 0.037
202409 0.036 127.285 0.037
202412 0.033 127.364 0.034
202503 0.032 129.181 0.033
202506 0.033 129.892 0.034
202509 0.032 130.287 0.032
202512 0.032 130.366 0.032
202603 0.031 132.262 0.031

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.

What does a Cyclically Adjusted PB Ratio of 0.27 mean?
Boron One Holdings (ERVFF) has a Cyclically Adjusted PB Ratio of 0.27 as of Jul. 22, 2026. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Boron One Holdings and its competitors. According to the industry distribution chart, Boron One Holdings ranks #332 out of 1542 companies in the Metals & Mining industry, placing it in the top 21.5%.
Is Boron One Holdings' Cyclically Adjusted PB Ratio too high?
Boron One Holdings' current Cyclically Adjusted PB Ratio is 0.27. The Metals & Mining industry median Cyclically Adjusted PB Ratio is 1.38. Boron One Holdings' value of 0.27 is 80.4% below this industry median. Based on the distribution chart, Boron One Holdings ranks #332 out of 1542 companies in the Metals & Mining industry, which is in the top quartile — a strong position relative to peers.
How does Boron One Holdings' Cyclically Adjusted PB Ratio compare to competitors?
According to the Metals & Mining industry distribution chart, Boron One Holdings ranks #332 out of 1542 companies for Cyclically Adjusted PB Ratio. This places Boron One Holdings in the top 22% of its industry — outperforming the majority of peers. The industry median Cyclically Adjusted PB Ratio is 1.38. Boron One Holdings' value of 0.27 is 80.4% below this benchmark. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted PB Ratio for a Metals & Mining company?
The median Cyclically Adjusted PB Ratio among Metals & Mining companies is 1.38, based on 1,542 companies in the industry. Companies in the top quartile (top 25%) have a Cyclically Adjusted PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, Cyclically Adjusted PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Boron One Holdings's current Cyclically Adjusted PB Ratio of 0.27 is 80.4% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Cyclically Adjusted PB Ratio mean?
A high Cyclically Adjusted PB Ratio can signal that a stock is expensive relative to its fundamentals. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Boron One Holdings and its competitors. For the Metals & Mining industry, the median Cyclically Adjusted PB Ratio is 1.38 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Boron One Holdings's current Cyclically Adjusted PB Ratio is 0.27. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Boron One Holdings stock overvalued right now?
Boron One Holdings (ERVFF) has a current Cyclically Adjusted PB Ratio of 0.27. The current Cyclically Adjusted PB Ratio is 0.27 and 80.4% below the Metals & Mining industry median of 1.38. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted PB Ratio calculated?
Cyclically Adjusted PB Ratio is calculated from a company's financial statements. For Boron One Holdings (ERVFF), the current Cyclically Adjusted PB Ratio is 0.27 as of Jul. 22, 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.

Boron One Holdings Business Description

Other Exchanges EKV:GermanyBONE:Canada
Address 645 Fort Street, Suite 203, Victoria, BC, CAN, V8W 1G2
Boron One Holdings Inc is an international junior mining and exploration company engaged in the acquisition, exploration, and evaluation of mineral properties. The company holds an exploration license for the Piskanja boron deposit in Serbia, a sedimentary basin deposit composed mainly of shales, marls, and limestone with two primary borate beds. Boron One maintains a geographic presence in both Canada and Serbia.