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Star Bulk CarriersSTU:4FAP +0.89%73 Piotroski F-Score is 6 as of Aug. 08, 2026, which is at its 10-year median of 6.00. GuruFocus rates STU:4FAP with a GF Score™ of 73/100 and a GF Value™ of €15.98 (Significantly Overvalued). The stock has 9 warning signs investors should review. Among 980 Transportation companies, Star Bulk Carriers ranks better than 71.22% on this metric.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Star Bulk Carriers has an F-score of 9. It is a good or high score, which usually indicates a very healthy situation.
The historical rank and industry rank for Star Bulk Carriers's Piotroski F-Score or its related term are showing as below:
STU:4FAP'
s Piotroski F-Score Range Over the Past 10 Years
Min: 2 Med: 6 Max: 8
Current: 6
During the past 13 years, the highest Piotroski F-Score of Star Bulk Carriers was 8. The lowest was 2. And the median was 6.
Star Bulk Carriers (STU:4FAP) 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.
Star Bulk Carriers Piotroski F-Score Related Terms
Star Bulk Carriers Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Star Bulk Carriers'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.
STU:4FAP vs ZIM, DAC, NMM: Piotroski F-Score Comparison
For the Marine Shipping subindustry, Star Bulk Carriers'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.
Star Bulk Carriers Piotroski F-Score vs Transportation Industry
For the Transportation industry and Industrials sector, Star Bulk Carriers's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Star Bulk Carriers'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.
Star Bulk Carriers's current Net Income (TTM) was 248.
==> 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.
Star Bulk Carriers's return on assets of this year was 0.07342881. Star Bulk Carriers's return on assets of last year was 0.02901171.
==> This year is higher. ==> Score 1.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Star Bulk Carriers's gearing of this year was 0.21284471. Star Bulk Carriers's gearing of last year was 0.25458524.
==> 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
Star Bulk Carriers's current ratio of this year was 1.9145046. Star Bulk Carriers's current ratio of last year was 1.60533231.
==> 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.
Star Bulk Carriers's number of shares in issue this year was 111.585. Star Bulk Carriers's number of shares in issue last year was 116.086.
==> 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.
Star Bulk Carriers's gross margin of this year was 0.33513055. Star Bulk Carriers's gross margin of last year was 0.21411569.
==> 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
Star Bulk Carriers's asset turnover of this year was 0.30659297. Star Bulk Carriers's asset turnover of last year was 0.26238953.
==> This year's asset turnover is higher. ==> Score 1.
Evaluation
Piotroski F-Score
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Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Star Bulk Carriers has an F-score of 9. It is a good or high score, which usually indicates a very healthy situation.
Star Bulk Carriers (STU:4FAP) has a Piotroski F-Score of 6 as of Aug. 08, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Star Bulk Carriers and its competitors. This is near median its historical median of 6.00. Over the past decade, Star Bulk Carriers' Piotroski F-Score has ranged from 2.00 to 8.00. According to the industry distribution chart, Star Bulk Carriers ranks #282 out of 980 companies in the Transportation industry, placing it in the top 28.8%.
Is Star Bulk Carriers' Piotroski F-Score too high?
Star Bulk Carriers' current Piotroski F-Score of 6 is near median its 10-year median of 6.00. Over the past 10 years, this metric has ranged from a low of 2.00 to a high of 8.00. The Transportation industry median Piotroski F-Score is 6.00. Star Bulk Carriers' value of 6 is 0% at this industry median. Based on the distribution chart, Star Bulk Carriers ranks #282 out of 980 companies in the Transportation industry, which is above the industry midpoint. Overall, Star Bulk Carriers has a GF Score™ of 73/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Star Bulk Carriers' Piotroski F-Score compare to ZIM and DAC?
According to the Transportation industry distribution chart, Star Bulk Carriers ranks #282 out of 980 companies for Piotroski F-Score. This puts Star Bulk Carriers in the upper half of its industry. The industry median Piotroski F-Score is 6.00. Star Bulk Carriers' value of 6 is 0% at this benchmark. Historically, Star Bulk Carriers' own Piotroski F-Score has ranged from 2.00 to 8.00 over the past decade. While the company's 10-year median is 6.00 vs. the industry median of 6.00, Star Bulk Carriers has consistently been at 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 Transportation company?
The median Piotroski F-Score among Transportation companies is 6.00, based on 980 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. Star Bulk Carriers's current Piotroski F-Score of 6 is 0% at 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 Star Bulk Carriers and its competitors. For the Transportation industry, the median Piotroski F-Score is 6.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Star Bulk Carriers's current Piotroski F-Score is 6, which is near 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 Star Bulk Carriers stock overvalued right now?
Based on GuruFocus' analysis, Star Bulk Carriers (STU:4FAP) is currently considered Significantly Overvalued. The stock's GF Value™ is €15.98, compared to a current price of €24.90 — trading 55.8% above its estimated fair value. The current Piotroski F-Score is 6, which is near median its 10-year median of 6.00 and 0% at the Transportation industry median of 6.00. Star Bulk Carriers' overall GF Score™ is 73/100 with 9 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 Star Bulk Carriers (STU:4FAP), the current Piotroski F-Score is 6 as of Aug. 08, 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 Star Bulk Carriers (STU:4FAP) Overvalued in 2026?
Based on GuruFocus' analysis, Star Bulk Carriers stock appears to be overvalued.
The current stock price of €24.90 is trading 55.8% above its estimated GF Value™ of €15.98.
GuruFocus considers Star Bulk Carriers to be Significantly Overvalued.
Key valuation signals for STU:4FAP:
Piotroski F-Score: 6 (near median its 10-year median of 6.00)
GF Value™: €15.98 vs. price of €24.90 (55.8% above fair value)
Industry Position: 0% at the Transportation median (#282 of 980)
No single metric tells the full story. See the STU:4FAP stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Star Bulk Carriers Corp provides seaborne transportation solutions in the dry bulk sector. The company owns and operates dry bulk carrier vessels, which are used to transport bulk, such as iron ore, coal, grains, bauxite, fertilizers, and steel products. It owns a fleet of vessels that consists of Newcastlemax, Capesize, Post Panamax, Kamsarmax, Panamax, Ultramax, and Supramax. The firm generates the majority of its revenue from Time charters and Voyage charters.
73GF Score
Get the complete analysis for STU:4FAP
Piotroski F-Score is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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