Acorn EnergyACFN -1.52%66 Cyclically Adjusted PB Ratio is 58.24 as of Jul. 03, 2026, which is 9448% above its 10-year median of 0.61. GuruFocus rates ACFN with a GF Score™ of 66/100 and a GF Value™ of $13.65 (Modestly Overvalued). The stock has 4 warning signs investors should review. Among 1,979 Hardware companies, Acorn Energy ranks worse than 99.19% on this metric.
The historical rank and industry rank for Acorn Energy's Cyclically Adjusted PB Ratio or its related term are showing as below:
ACFN'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0.07 Med: 0.61 Max: 595.3
Current: 57.48
During the past years, Acorn Energy's highest Cyclically Adjusted PB Ratio was 595.30. The lowest was 0.07. And the median was 0.61.
ACFN's Cyclically Adjusted PB Ratio is ranked worse than 99.19% of 1979
companies
in the Hardware industry
Industry Median: 2.16
vs ACFN: 57.48
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.
Acorn Energy's adjusted book value per share data for the three months ended in Mar. 2026 was $3.343. 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 $0.29 for the trailing ten years ended in Mar. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Acorn Energy (NAS:ACFN) 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.
Acorn Energy Cyclically Adjusted PB Ratio Related Terms
Acorn Energy Cyclically Adjusted PB Ratio Historical Data
* Premium members only.
The historical data trend for Acorn Energy'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.
ACFN vs LGL, MIND, TRCK: Cyclically Adjusted PB Ratio Comparison
For the Scientific & Technical Instruments subindustry, Acorn Energy'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.
Acorn Energy Cyclically Adjusted PB Ratio vs Hardware Industry
For the Hardware industry and Technology sector, Acorn Energy's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where Acorn Energy's Cyclically Adjusted PB Ratio falls into.
Acorn Energy 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.
Acorn Energy'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 58.24 mean?
Acorn Energy (ACFN) has a Cyclically Adjusted PB Ratio of 58.24 as of Jul. 03, 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 Acorn Energy and its competitors. This is 9448% above median its historical median of 0.61. Over the past decade, Acorn Energy's Cyclically Adjusted PB Ratio has ranged from 0.07 to 595.30. According to the industry distribution chart, Acorn Energy ranks #1963 out of 1979 companies in the Hardware industry, placing it in the top 99.2%.
Is Acorn Energy's Cyclically Adjusted PB Ratio too high?
Acorn Energy's current Cyclically Adjusted PB Ratio of 58.24 is 9448% above median its 10-year median of 0.61. Over the past 10 years, this metric has ranged from a low of 0.07 to a high of 595.30. The Hardware industry median Cyclically Adjusted PB Ratio is 2.16. Acorn Energy's value of 58.24 is 2596.3% above this industry median. Based on the distribution chart, Acorn Energy ranks #1963 out of 1979 companies in the Hardware industry, which is in the bottom quartile relative to peers. Overall, Acorn Energy has a GF Score™ of 66/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Acorn Energy's Cyclically Adjusted PB Ratio compare to LGL and MIND?
According to the Hardware industry distribution chart, Acorn Energy ranks #1963 out of 1979 companies for Cyclically Adjusted PB Ratio. This places Acorn Energy in the lower half of its industry. The industry median Cyclically Adjusted PB Ratio is 2.16. Acorn Energy's value of 58.24 is 2596.3% above this benchmark. Historically, Acorn Energy's own Cyclically Adjusted PB Ratio has ranged from 0.07 to 595.30 over the past decade. While the company's 10-year median is 0.61 vs. the industry median of 2.16, Acorn Energy has consistently been above 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 Hardware company?
The median Cyclically Adjusted PB Ratio among Hardware companies is 2.16, based on 1,979 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. Acorn Energy's current Cyclically Adjusted PB Ratio of 58.24 is 2596.3% above 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 Acorn Energy and its competitors. For the Hardware industry, the median Cyclically Adjusted PB Ratio is 2.16 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Acorn Energy's current Cyclically Adjusted PB Ratio is 58.24, which is 9448% above median its own 10-year median of 0.61. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Acorn Energy stock overvalued right now?
Based on GuruFocus' analysis, Acorn Energy (ACFN) is currently considered Modestly Overvalued. The stock's GF Value™ is $13.65, compared to a current price of $16.89 — trading 23.7% above its estimated fair value. The current Cyclically Adjusted PB Ratio is 58.24, which is 9448% above median its 10-year median of 0.61 and 2596.3% above the Hardware industry median of 2.16. Acorn Energy's overall GF Score™ is 66/100 with 4 warning signs to review. 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 Acorn Energy (ACFN), the current Cyclically Adjusted PB Ratio is 58.24 as of Jul. 03, 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 Acorn Energy (ACFN) Overvalued in 2026?
Based on GuruFocus' analysis, Acorn Energy stock appears to be overvalued.
The current stock price of $16.89 is trading 23.7% above its estimated GF Value™ of $13.65.
GuruFocus considers Acorn Energy to be Modestly Overvalued.
Key valuation signals for ACFN:
Cyclically Adjusted PB Ratio: 58.24 (9448% above median its 10-year median of 0.61)
GF Value™: $13.65 vs. price of $16.89 (23.7% above fair value)
Industry Position: 2596.3% above the Hardware median (#1963 of 1979)
No single metric tells the full story. See the ACFN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Acorn Energy Inc is a holding company that focuses on technology-driven solutions for energy infrastructure asset management. The company operates through two segments namely, the PG segment and the CP segment. PG segment provides wireless remote monitoring and control systems and services for critical assets as well as Internet of Things applications which account for the majority of the revenue. CP segment is engaged in providing remote monitoring of cathodic protection systems on gas pipelines for gas utilities and pipeline companies.
66GF Score
Get the complete analysis for ACFN
Cyclically Adjusted PB Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
ACFN has been successfully added to your 
