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Diversified Energy CoDEC +2.16%69 Shiller PE Ratio is 7.22 as of Aug. 11, 2026, which is 21% below its 10-year median of 9.14. GuruFocus rates DEC with a GF Score™ of 69/100 and a GF Value™ of $18.76 (Modestly Undervalued). The stock has 9 warning signs investors should review. Among 438 Oil & Gas companies, Diversified Energy Co ranks better than 86.76% on this metric.
The historical rank and industry rank for Diversified Energy Co's Shiller PE Ratio or its related term are showing as below:
DEC'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 6.14 Med: 9.14 Max: 367.5
Current: 7.22
During the past 13 years, Diversified Energy Co's highest Shiller PE Ratio was 367.50. The lowest was 6.14. And the median was 9.14.
DEC's Shiller PE Ratio is ranked better than 86.76% of 438
companies
in the Oil & Gas industry
Industry Median: 17.28
vs DEC: 7.22
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.
Diversified Energy Co's adjusted earnings per share data of for the fiscal year that ended in Dec25 was $4.580. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $2.03 for the trailing ten years ended in Dec25.
Shiller PE for Stocks: The True Measure of Stock Valuation
Diversified Energy Co (NYSE:DEC) Shiller PE Ratio Explanation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Diversified Energy Co Shiller PE Ratio Related Terms
Diversified Energy Co Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Diversified Energy Co's Shiller PE 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.
DEC vs SLNG, SKYQ, ECTM: Shiller PE Ratio Comparison
For the Oil & Gas Integrated subindustry, Diversified Energy Co's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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.
Diversified Energy Co Shiller PE Ratio vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Diversified Energy Co's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Diversified Energy Co's Shiller PE Ratio falls into.
Diversified Energy Co Shiller PE Ratio Calculation
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
* 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.
Add all the adjusted EPS together and divide 10 will get our E10.
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.
Diversified Energy Co (DEC) has a Shiller PE Ratio of 7.22 as of Aug. 11, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Diversified Energy Co and its competitors. This is 21% below median its historical median of 9.14. Over the past decade, Diversified Energy Co's Shiller PE Ratio has ranged from 6.14 to 367.50. According to the industry distribution chart, Diversified Energy Co ranks #58 out of 438 companies in the Oil & Gas industry, placing it in the top 13.2%.
Is Diversified Energy Co's Shiller PE Ratio too high?
Diversified Energy Co's current Shiller PE Ratio of 7.22 is 21% below median its 10-year median of 9.14. Over the past 10 years, this metric has ranged from a low of 6.14 to a high of 367.50. The Oil & Gas industry median Shiller PE Ratio is 17.28. Diversified Energy Co's value of 7.22 is 58.2% below this industry median. Based on the distribution chart, Diversified Energy Co ranks #58 out of 438 companies in the Oil & Gas industry, which is in the top quartile — a strong position relative to peers. Overall, Diversified Energy Co has a GF Score™ of 69/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Diversified Energy Co's Shiller PE Ratio compare to SLNG and SKYQ?
According to the Oil & Gas industry distribution chart, Diversified Energy Co ranks #58 out of 438 companies for Shiller PE Ratio. This places Diversified Energy Co in the top 13% of its industry — outperforming the majority of peers. The industry median Shiller PE Ratio is 17.28. Diversified Energy Co's value of 7.22 is 58.2% below this benchmark. Historically, Diversified Energy Co's own Shiller PE Ratio has ranged from 6.14 to 367.50 over the past decade. While the company's 10-year median is 9.14 vs. the industry median of 17.28, Diversified Energy Co 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 Shiller PE Ratio for an Oil & Gas company?
The median Shiller PE Ratio among Oil & Gas companies is 17.28, based on 438 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Diversified Energy Co's current Shiller PE Ratio of 7.22 is 58.2% 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 Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Diversified Energy Co and its competitors. For the Oil & Gas industry, the median Shiller PE Ratio is 17.28 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Diversified Energy Co's current Shiller PE Ratio is 7.22, which is 21% below median its own 10-year median of 9.14. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Diversified Energy Co stock overvalued right now?
Based on GuruFocus' analysis, Diversified Energy Co (DEC) is currently considered Modestly Undervalued. The stock's GF Value™ is $18.76, compared to a current price of $14.65 — trading 21.9% below its estimated fair value. The current Shiller PE Ratio is 7.22, which is 21% below median its 10-year median of 9.14 and 58.2% below the Oil & Gas industry median of 17.28. Diversified Energy Co's overall GF Score™ is 69/100 with 9 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Diversified Energy Co (DEC), the current Shiller PE Ratio is 7.22 as of Aug. 11, 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 Diversified Energy Co (DEC) Overvalued in 2026?
Based on GuruFocus' analysis, Diversified Energy Co stock appears to be undervalued.
The current stock price of $14.65 is trading 21.9% below its estimated GF Value™ of $18.76.
GuruFocus considers Diversified Energy Co to be Modestly Undervalued.
Key valuation signals for DEC:
Shiller PE Ratio: 7.22 (21% below median its 10-year median of 9.14)
GF Value™: $18.76 vs. price of $14.65 (21.9% below fair value)
Industry Position: 58.2% below the Oil & Gas median (#58 of 438)
No single metric tells the full story. See the DEC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Diversified Energy Co engaged in the production, transportation, and marketing of natural gas, NGLs, and oil, managing a diversified portfolio of mature, long-life assets located across the United States. The company derives revenues from the sale of oil, natural gas and natural gas liquids.
69GF Score
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