NGKNGKIF -4.07%72 Piotroski F-Score is 9 as of Jun. 26, 2026, which is 29% above its 10-year median of 7.00. GuruFocus rates NGKIF with a GF Score™ of 72/100 and a GF Value™ of $14.39 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 2,979 Industrial Products companies, NGK ranks better than 99.97% on this metric.
Good Sign:
Piotroski F-Score is 9, indicates a very healthy situation.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
NGK has an F-score of 8. It is a good or high score, which usually indicates a very healthy situation.
The historical rank and industry rank for NGK's Piotroski F-Score or its related term are showing as below:
NGKIF'
s Piotroski F-Score Range Over the Past 10 Years
Min: 4 Med: 7 Max: 9
Current: 9
During the past 13 years, the highest Piotroski F-Score of NGK was 9. The lowest was 4. And the median was 7.
NGK (OTCPK:NGKIF) Piotroski F-Score Explanation
The developer of the system is Joseph D. Piotroski is relatively unknown accounting professor who shuns publicity and rarely gives interviews.
He graduated from the University of Illinois with a B.S. in accounting in 1989, received an M.B.A. from Indiana University in 1994. Five years later, in 1999, after earning a Ph.D. in accounting from the University of Michigan, he became an associate professor of accounting at the University of Chicago.
He wanted to see if he can develop a system (using a simple nine-point scoring system) that can increase the returns of a strategy of investing in low price to book (referred to in the paper as high book to market) value companies.
What he found was something that exceeded his most optimistic expectations.
Buying only those companies that scored highest (8 or 9) on his nine-point scale, or F-Score as he called it, over the 20 year period from 1976 to 1996 led to an average out-performance over the market of 13.4%.
Even more impressive were the results of a strategy of investing in the highest F-Score companies (8 or 9) and shorting companies with the lowest F-Score (0 or 1).
Over the same period from 1976 to 1996 (20 years) this strategy led to an average yearly return of 23%, substantially outperforming the average S&P 500 index return of 15.83% over the same period.
NGK Piotroski F-Score Related Terms
NGK Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for NGK's Piotroski F-Score 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.
NGKIF vs GEV, ETN, PH: Piotroski F-Score Comparison
For the Specialty Industrial Machinery subindustry, NGK's Piotroski F-Score, along with its competitors' market caps and Piotroski F-Score 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.
NGK Piotroski F-Score vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, NGK's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where NGK's Piotroski F-Score falls into.
* 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.
*Note: If the latest quarterly/semi-annual/annual total assets data is 0, then we will use previous quarterly/semi-annual/annual data for all the items in the balance sheet.
Profitability
Question 1. Return on Assets (ROA)
Net income before extraordinary items for the year divided by Total Assets at the beginning of the year.
Score 1 if positive, 0 if negative.
NGK's current Net Income (TTM) was 378.
==> Positive ==> Score 1.
Question 2. Cash Flow Return on Assets (CFROA)
Net cash flow from operating activities (operating cash flow) divided by Total Assets at the beginning of the year.
NGK's current ratio of this year was 4.37360938. NGK's current ratio of last year was 3.73856358.
==> This year's current ratio is higher. ==> Score 1.
Question 7. Change in Shares in Issue
Compare the number of shares in issue this year, to the number in issue last year.
Score 0 if there is larger number of shares in issue this year, 1 otherwise.
NGK's number of shares in issue this year was 290.923. NGK's number of shares in issue last year was 295.88.
==> There is smaller number of shares in issue this year, or the same. ==> Score 1.
Efficiency
Question 8. Change in Gross Margin
Compare this year's gross margin (Gross Profit divided by sales) to last year's.
Score 1 if this year's gross margin is higher, 0 if it's lower.
NGK's gross margin of this year was 0.29123075. NGK's gross margin of last year was 0.28404896.
==> This year's gross margin is higher. ==> Score 1.
Question 9. Change in asset turnover
Compare this year's asset turnover (total sales for the year divided by total assets at the beginning of the year) to last year's asset turnover ratio.
Score 1 if this year's asset turnover ratio is higher, 0 if it's lower
NGK's asset turnover of this year was 0.55073087. NGK's asset turnover of last year was 0.55222524.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
Piotroski F-Score
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Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
NGK has an F-score of 8. It is a good or high score, which usually indicates a very healthy situation.
NGK (NGKIF) has a Piotroski F-Score of 9 as of Jun. 26, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on NGK and its competitors. This is 29% above median its historical median of 7.00. Over the past decade, NGK's Piotroski F-Score has ranged from 4.00 to 9.00. According to the industry distribution chart, NGK ranks #1 out of 2979 companies in the Industrial Products industry, placing it in the top 0%.
Is NGK's Piotroski F-Score too high?
NGK's current Piotroski F-Score of 9 is 29% above median its 10-year median of 7.00. Over the past 10 years, this metric has ranged from a low of 4.00 to a high of 9.00. The Industrial Products industry median Piotroski F-Score is 5.00. NGK's value of 9 is 80% above this industry median. Based on the distribution chart, NGK ranks #1 out of 2979 companies in the Industrial Products industry, which is in the top quartile — a strong position relative to peers. Overall, NGK has a GF Score™ of 72/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does NGK's Piotroski F-Score compare to GEV and ETN?
According to the Industrial Products industry distribution chart, NGK ranks #1 out of 2979 companies for Piotroski F-Score. This places NGK in the top 0% of its industry — outperforming the majority of peers. The industry median Piotroski F-Score is 5.00. NGK's value of 9 is 80% above this benchmark. Historically, NGK's own Piotroski F-Score has ranged from 4.00 to 9.00 over the past decade. While the company's 10-year median is 7.00 vs. the industry median of 5.00, NGK 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 Piotroski F-Score for an Industrial Products company?
The median Piotroski F-Score among Industrial Products companies is 5.00, based on 2,979 companies in the industry. Companies in the top quartile (top 25%) have a Piotroski F-Score significantly above this median, while those in the bottom quartile fall well below. However, Piotroski F-Score should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. NGK's current Piotroski F-Score of 9 is 80% 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 Piotroski F-Score mean?
A high Piotroski F-Score can signal that a stock is expensive relative to its fundamentals. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on NGK and its competitors. For the Industrial Products industry, the median Piotroski F-Score is 5.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. NGK's current Piotroski F-Score is 9, which is 29% above median its own 10-year median of 7.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is NGK stock overvalued right now?
Based on GuruFocus' analysis, NGK (NGKIF) is currently considered Significantly Overvalued. The stock's GF Value™ is $14.39, compared to a current price of $46.16 — trading 220.7% above its estimated fair value. The current Piotroski F-Score is 9, which is 29% above median its 10-year median of 7.00 and 80% above the Industrial Products industry median of 5.00. NGK's overall GF Score™ is 72/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Piotroski F-Score calculated?
Piotroski F-Score is calculated from a company's financial statements. For NGK (NGKIF), the current Piotroski F-Score is 9 as of Jun. 26, 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 NGK (NGKIF) Overvalued in 2026?
Based on GuruFocus' analysis, NGK stock appears to be overvalued.
The current stock price of $46.16 is trading 220.7% above its estimated GF Value™ of $14.39.
GuruFocus considers NGK to be Significantly Overvalued.
Key valuation signals for NGKIF:
Piotroski F-Score: 9 (29% above median its 10-year median of 7.00)
GF Value™: $14.39 vs. price of $46.16 (220.7% above fair value)
Industry Position: 80% above the Industrial Products median (#1 of 2979)
No single metric tells the full story. See the NGKIF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
NGK Corp is engaged in manufacturing and selling electric power-related equipment, including insulators, industrial ceramic and other related products. The products of the company include Insulator and power equipments, Automotive Ceramics Business, Special Metals and mold products, Electronic components business, Industrial process products, Aircraft, ships, space related services, and others.
72GF Score
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Piotroski F-Score is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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