Blue BirdSTU:4RB +0.35%80 Piotroski F-Score is 8 as of Jun. 27, 2026, which is 33% above its 10-year median of 6.00. GuruFocus rates STU:4RB with a GF Score™ of 80/100 and a GF Value™ of €44.26 (Significantly Overvalued). The stock has 4 warning signs investors should review. Among 207 Farm & Heavy Construction Machinery companies, Blue Bird ranks better than 97.1% on this metric.
Good Sign:
Piotroski F-Score is 8, 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
Blue Bird has an F-score of 7. It is a good or high score, which usually indicates a very healthy situation.
The historical rank and industry rank for Blue Bird's Piotroski F-Score or its related term are showing as below:
STU:4RB'
s Piotroski F-Score Range Over the Past 10 Years
Min: 2 Med: 6 Max: 8
Current: 8
During the past 13 years, the highest Piotroski F-Score of Blue Bird was 8. The lowest was 2. And the median was 6.
Blue Bird (STU:4RB) 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.
Blue Bird Piotroski F-Score Related Terms
Blue Bird Piotroski F-Score Historical Data
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The historical data trend for Blue Bird'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:4RB vs ALG, ASTE, LNN: Piotroski F-Score Comparison
For the Farm & Heavy Construction Machinery subindustry, Blue Bird'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.
Blue Bird Piotroski F-Score vs Farm & Heavy Construction Machinery Industry
For the Farm & Heavy Construction Machinery industry and Industrials sector, Blue Bird's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Blue Bird'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.
Blue Bird's current Net Income (TTM) was 114.
==> 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.
Blue Bird's return on assets of this year was 0.22729614. Blue Bird's return on assets of last year was 0.23910916.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Blue Bird's gearing of this year was 0.13394538. Blue Bird's gearing of last year was 0.17312847.
==> 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
Blue Bird's current ratio of this year was 1.83483819. Blue Bird's current ratio of last year was 1.44903839.
==> 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.
Blue Bird's number of shares in issue this year was 32.43. Blue Bird's number of shares in issue last year was 32.886.
==> 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.
Blue Bird's gross margin of this year was 0.21043949. Blue Bird's gross margin of last year was 0.1919583.
==> 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
Blue Bird's asset turnover of this year was 2.55176857. Blue Bird's asset turnover of last year was 2.99293985.
==> 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
Blue Bird has an F-score of 7. It is a good or high score, which usually indicates a very healthy situation.
Blue Bird (STU:4RB) has a Piotroski F-Score of 8 as of Jun. 27, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Blue Bird and its competitors. This is 33% above median its historical median of 6.00. Over the past decade, Blue Bird's Piotroski F-Score has ranged from 2.00 to 8.00. According to the industry distribution chart, Blue Bird ranks #6 out of 207 companies in the Farm & Heavy Construction Machinery industry, placing it in the top 2.9%.
Is Blue Bird's Piotroski F-Score too high?
Blue Bird's current Piotroski F-Score of 8 is 33% above 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 Farm & Heavy Construction Machinery industry median Piotroski F-Score is 5.00. Blue Bird's value of 8 is 60% above this industry median. Based on the distribution chart, Blue Bird ranks #6 out of 207 companies in the Farm & Heavy Construction Machinery industry, which is in the top quartile — a strong position relative to peers. Overall, Blue Bird has a GF Score™ of 80/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Blue Bird's Piotroski F-Score compare to ALG and ASTE?
According to the Farm & Heavy Construction Machinery industry distribution chart, Blue Bird ranks #6 out of 207 companies for Piotroski F-Score. This places Blue Bird in the top 3% of its industry — outperforming the majority of peers. The industry median Piotroski F-Score is 5.00. Blue Bird's value of 8 is 60% above this benchmark. Historically, Blue Bird's 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 5.00, Blue Bird 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 a Farm & Heavy Construction Machinery company?
The median Piotroski F-Score among Farm & Heavy Construction Machinery companies is 5.00, based on 207 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. Blue Bird's current Piotroski F-Score of 8 is 60% 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 Blue Bird and its competitors. For the Farm & Heavy Construction Machinery 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. Blue Bird's current Piotroski F-Score is 8, which is 33% above 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 Blue Bird stock overvalued right now?
Based on GuruFocus' analysis, Blue Bird (STU:4RB) is currently considered Significantly Overvalued. The stock's GF Value™ is €44.26, compared to a current price of €69.36 — trading 56.7% above its estimated fair value. The current Piotroski F-Score is 8, which is 33% above median its 10-year median of 6.00 and 60% above the Farm & Heavy Construction Machinery industry median of 5.00. Blue Bird's overall GF Score™ is 80/100 with 4 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 Blue Bird (STU:4RB), the current Piotroski F-Score is 8 as of Jun. 27, 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 Blue Bird (STU:4RB) Overvalued in 2026?
Based on GuruFocus' analysis, Blue Bird stock appears to be overvalued.
The current stock price of €69.36 is trading 56.7% above its estimated GF Value™ of €44.26.
GuruFocus considers Blue Bird to be Significantly Overvalued.
Key valuation signals for STU:4RB:
Piotroski F-Score: 8 (33% above median its 10-year median of 6.00)
GF Value™: €44.26 vs. price of €69.36 (56.7% above fair value)
Industry Position: 60% above the Farm & Heavy Construction Machinery median (#6 of 207)
No single metric tells the full story. See the STU:4RB stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Blue Bird Corp is an American bus manufacturing company. It is an independent designer and manufacturer of school buses. The company operates in two segments; the Bus segment which involves the design, engineering, manufacture, and sales of school buses and extended warranties; and the Parts segment which includes the sales of replacement bus parts. Geographically, the company generates a majority of its revenue from its customers in the United States and the rest from Canada and Rest of the world.
80GF Score
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