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Gem DiamondsGMDMF Cyclically Adjusted PB Ratio is 0.12 as of Jul. 20, 2026, which is 64% below its 10-year median of 0.33. The stock has 5 warning signs investors should review. Among 1,542 Metals & Mining companies, Gem Diamonds ranks better than 98.77% on this metric.
The historical rank and industry rank for Gem Diamonds's Cyclically Adjusted PB Ratio or its related term are showing as below:
GMDMF'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0.03 Med: 0.33 Max: 0.76
Current: 0.03
During the past 13 years, Gem Diamonds's highest Cyclically Adjusted PB Ratio was 0.76. The lowest was 0.03. And the median was 0.33.
GMDMF's Cyclically Adjusted PB Ratio is ranked better than 98.77% of 1542
companies
in the Metals & Mining industry
Industry Median: 1.375
vs GMDMF: 0.03
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.
Gem Diamonds's adjusted book value per share data of for the fiscal year that ended in Dec25 was $0.785. 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 $0.41 for the trailing ten years ended in Dec25.
Shiller PE for Stocks: The True Measure of Stock Valuation
Gem Diamonds (OTCPK:GMDMF) 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.
Gem Diamonds Cyclically Adjusted PB Ratio Related Terms
Gem Diamonds Cyclically Adjusted PB Ratio Historical Data
* Premium members only.
The historical data trend for Gem Diamonds'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.
GMDMF vs HL: Cyclically Adjusted PB Ratio Comparison
For the Other Precious Metals & Mining subindustry, Gem Diamonds'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.
Gem Diamonds Cyclically Adjusted PB Ratio vs Metals & Mining Industry
For the Metals & Mining industry and Basic Materials sector, Gem Diamonds's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where Gem Diamonds's Cyclically Adjusted PB Ratio falls into.
Gem Diamonds 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.
Gem Diamonds's Cyclically Adjusted PB Ratio for today is calculated as
* 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.
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 0.12 mean?
Gem Diamonds (GMDMF) has a Cyclically Adjusted PB Ratio of 0.12 as of Jul. 20, 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 Gem Diamonds and its competitors. This is 64% below median its historical median of 0.33. Over the past decade, Gem Diamonds' Cyclically Adjusted PB Ratio has ranged from 0.03 to 0.76. According to the industry distribution chart, Gem Diamonds ranks #19 out of 1542 companies in the Metals & Mining industry, placing it in the top 1.2%.
Is Gem Diamonds' Cyclically Adjusted PB Ratio too high?
Gem Diamonds' current Cyclically Adjusted PB Ratio of 0.12 is 64% below median its 10-year median of 0.33. Over the past 10 years, this metric has ranged from a low of 0.03 to a high of 0.76. The Metals & Mining industry median Cyclically Adjusted PB Ratio is 1.38. Gem Diamonds' value of 0.12 is 91.3% below this industry median. Based on the distribution chart, Gem Diamonds ranks #19 out of 1542 companies in the Metals & Mining industry, which is in the top quartile — a strong position relative to peers.
How does Gem Diamonds' Cyclically Adjusted PB Ratio compare to HL?
According to the Metals & Mining industry distribution chart, Gem Diamonds ranks #19 out of 1542 companies for Cyclically Adjusted PB Ratio. This places Gem Diamonds in the top 1% of its industry — outperforming the majority of peers. The industry median Cyclically Adjusted PB Ratio is 1.38. Gem Diamonds' value of 0.12 is 91.3% below this benchmark. Historically, Gem Diamonds' own Cyclically Adjusted PB Ratio has ranged from 0.03 to 0.76 over the past decade. While the company's 10-year median is 0.33 vs. the industry median of 1.38, Gem Diamonds has consistently been below the industry average. 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. Gem Diamonds's current Cyclically Adjusted PB Ratio of 0.12 is 91.3% 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 Gem Diamonds 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. Gem Diamonds's current Cyclically Adjusted PB Ratio is 0.12, which is 64% below median its own 10-year median of 0.33. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Gem Diamonds stock overvalued right now?
Based on GuruFocus' analysis, Gem Diamonds (GMDMF) is currently considered Significantly Overvalued. The stock's GF Value™ is $0.03, compared to a current price of $0.05 — trading 66.7% above its estimated fair value. The current Cyclically Adjusted PB Ratio is 0.12, which is 64% below median its 10-year median of 0.33 and 91.3% 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 Gem Diamonds (GMDMF), the current Cyclically Adjusted PB Ratio is 0.12 as of Jul. 20, 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.
Gem Diamonds Ltd is a United Kingdom-based company engaged in the exploration and development of diamond mines. The company's geographical segments include Lesotho (diamond mining activities); Belgium (sales, marketing, and manufacturing of diamonds); and BVI, RSA, the UK, and Cyprus (technical and administrative services) and Botswana (diamond mining activities, currently on care and maintenance). It generates maximum revenue from the Belgium region. Its projects include Letseng Diamond mine and Ghaghoo Diamond mine. The company's revenue is derived from mining activities, polished manufacturing margins, and diamond analysis and manufacturing services.
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