Tianan Technology GroupTANAF -38.41%15 Piotroski F-Score is 3 as of Jun. 24, 2026, which is 50% below its 10-year median of 6.00. GuruFocus rates TANAF with a GF Score™ of 15/100. The stock has 3 warning signs investors should review. Among 805 Medical Devices & Instruments companies, Tianan Technology Group ranks worse than 77.02% on this metric.
Warning Sign:
Piotroski F-Score of 3 is low, which usually implies poor business operation.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Tianan Technology Group has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
The historical rank and industry rank for Tianan Technology Group's Piotroski F-Score or its related term are showing as below:
TANAF'
s Piotroski F-Score Range Over the Past 10 Years
Min: 3 Med: 6 Max: 7
Current: 3
During the past 5 years, the highest Piotroski F-Score of Tianan Technology Group was 7. The lowest was 3. And the median was 6.
Tianan Technology Group (OTCPK:TANAF) 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.
Tianan Technology Group Piotroski F-Score Related Terms
Tianan Technology Group Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Tianan Technology Group'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.
TANAF vs INGN, INFU, APYX: Piotroski F-Score Comparison
For the Medical Devices subindustry, Tianan Technology Group'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.
Tianan Technology Group Piotroski F-Score vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Tianan Technology Group's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Tianan Technology Group'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.
Tianan Technology Group's current Net Income (TTM) was -0.09.
==> Negative ==> Score 0.
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.
Score 1 if positive, 0 if negative.
Tianan Technology Group's current Cash Flow from Operations (TTM) was 0.13.
==> Positive ==> Score 1.
Question 3. Change in Return on Assets
Compare this year's return on assets (1) to last year's return on assets.
Tianan Technology Group's return on assets of this year was -0.0877193. Tianan Technology Group's return on assets of last year was 2.57062147.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Tianan Technology Group's gearing of this year was 0. Tianan Technology Group's gearing of last year was 0.
==> This year is lower or equal to last year. ==> Score 1.
Question 6. Change in Working Capital (Liquidity)
Compare this year's current ratio (current assets divided by current liabilities) to last year's current ratio.
Score 1 if this year's current ratio is higher, 0 if it's lower
Tianan Technology Group's current ratio of this year was 0.8902439. Tianan Technology Group's current ratio of last year was 1.01988072.
==> Last year's current ratio is higher ==> Score 0.
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.
Tianan Technology Group's number of shares in issue this year was 45.518. Tianan Technology Group's number of shares in issue last year was 45.512.
==> There is larger number of shares in issue this year. ==> Score 0.
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.
Tianan Technology Group's gross margin of this year was 0.34557823. Tianan Technology Group's gross margin of last year was 0.46999439.
==> Last year's gross margin is higher ==> Score 0.
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
Tianan Technology Group's asset turnover of this year was 0.71637427. Tianan Technology Group's asset turnover of last year was 10.07344633.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
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Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Tianan Technology Group has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
Tianan Technology Group (TANAF) has a Piotroski F-Score of 3 as of Jun. 24, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Tianan Technology Group and its competitors. This is 50% below median its historical median of 6.00. Over the past decade, Tianan Technology Group's Piotroski F-Score has ranged from 3.00 to 7.00. According to the industry distribution chart, Tianan Technology Group ranks #620 out of 805 companies in the Medical Devices & Instruments industry, placing it in the top 77%.
Is Tianan Technology Group's Piotroski F-Score too high?
Tianan Technology Group's current Piotroski F-Score of 3 is 50% below median its 10-year median of 6.00. Over the past 10 years, this metric has ranged from a low of 3.00 to a high of 7.00. The Medical Devices & Instruments industry median Piotroski F-Score is 5.00. Tianan Technology Group's value of 3 is 40% below this industry median. Based on the distribution chart, Tianan Technology Group ranks #620 out of 805 companies in the Medical Devices & Instruments industry, which is in the bottom quartile relative to peers. Overall, Tianan Technology Group has a GF Score™ of 15/100, reflecting its overall financial health beyond just this single metric.
How does Tianan Technology Group's Piotroski F-Score compare to INGN and INFU?
According to the Medical Devices & Instruments industry distribution chart, Tianan Technology Group ranks #620 out of 805 companies for Piotroski F-Score. This places Tianan Technology Group in the lower half of its industry. The industry median Piotroski F-Score is 5.00. Tianan Technology Group's value of 3 is 40% below this benchmark. Historically, Tianan Technology Group's own Piotroski F-Score has ranged from 3.00 to 7.00 over the past decade. While the company's 10-year median is 6.00 vs. the industry median of 5.00, Tianan Technology Group 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 Piotroski F-Score for a Medical Devices & Instruments company?
The median Piotroski F-Score among Medical Devices & Instruments companies is 5.00, based on 805 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. Tianan Technology Group's current Piotroski F-Score of 3 is 40% 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 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 Tianan Technology Group and its competitors. For the Medical Devices & Instruments 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. Tianan Technology Group's current Piotroski F-Score is 3, which is 50% below median its own 10-year median of 6.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Tianan Technology Group stock overvalued right now?
Tianan Technology Group (TANAF) has a current Piotroski F-Score of 3. The current Piotroski F-Score is 3, which is 50% below median its 10-year median of 6.00 and 40% below the Medical Devices & Instruments industry median of 5.00. Tianan Technology Group's overall GF Score™ is 15/100 with 3 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 Tianan Technology Group (TANAF), the current Piotroski F-Score is 3 as of Jun. 24, 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.
Tianan Technology Group Ltd is focused on graphene production enterprises and is engaged in the health therapy industry. It utilizes the far-infrared heat therapy characteristics of graphene, which is incorporated into its products. Its products include Graphene Far Infrared Energy Room, Pure Graphene Heating Music Blanket, Graphene Pillow, Pure Graphene Heating Knee Compartment, Pure Graphene Heating Knee Pads, Pure Graphene Eye Mask, Intelligent graphene suspension moxibustion instrument, and Pure Graphene Eye Mask. The Company operates in one reportable business segment: Healthcare.
15GF Score
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