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Joby AviationSTU:8TQ -1.55%30 Piotroski F-Score is 3 as of Jul. 29, 2026, which is at its 10-year median of 3.00. GuruFocus rates STU:8TQ with a GF Score™ of 30/100. The stock has 4 warning signs investors should review. Among 978 Transportation companies, Joby Aviation ranks worse than 88.55% 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
Joby Aviation 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 Joby Aviation's Piotroski F-Score or its related term are showing as below:
STU:8TQ'
s Piotroski F-Score Range Over the Past 10 Years
Min: 1 Med: 3 Max: 4
Current: 3
During the past 6 years, the highest Piotroski F-Score of Joby Aviation was 4. The lowest was 1. And the median was 3.
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.
Joby Aviation Piotroski F-Score Related Terms
Joby Aviation Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Joby Aviation'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:8TQ vs CAAP, ASLE, UP: Piotroski F-Score Comparison
For the Airports & Air Services subindustry, Joby Aviation'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.
Joby Aviation Piotroski F-Score vs Transportation Industry
For the Transportation industry and Industrials sector, Joby Aviation's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Joby Aviation'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.
This Year (Mar26) TTM:
Last Year (Mar25) TTM:
Net Income was -281.492 + -341.845 + -103.792 + -95.107 = €-822.24 Mil. Cash Flow from Operations was -92.39 + -118.592 + -130.805 + -124.94 = €-466.73 Mil. Revenue was 0.013 + 19.233 + 26.334 + 20.973 = €66.55 Mil. Gross Profit was 0.004 + 10.662 + 9.888 + 4.708 = €25.26 Mil.
Average Total Assets from the begining of this year (Mar25)
to the end of this year (Mar26) was
(1002.717 + 1092.312 + 1164.095 + 1532.989 + 2532.421) / 5 = €1464.9068 Mil. Total Assets at the begining of this year (Mar25) was €1,002.72 Mil. Long-Term Debt & Capital Lease Obligation was €636.08 Mil. Total Current Assets was €2,172.52 Mil. Total Current Liabilities was €98.51 Mil.
Net Income was -114.538 + -129.634 + -235.195 + -76.226 = €-555.59 Mil.
*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.
Joby Aviation's current Net Income (TTM) was -822.24.
==> 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.
Joby Aviation's return on assets of this year was -0.82000804. Joby Aviation's return on assets of last year was -0.51866024.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Joby Aviation's gearing of this year was 0.43421261. Joby Aviation's gearing of last year was 0.02376839.
==> Last year is lower than this year ==> Score 0.
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
Joby Aviation's current ratio of this year was 22.05496168. Joby Aviation's current ratio of last year was 17.71557002.
==> 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.
Joby Aviation's number of shares in issue this year was 943.503. Joby Aviation's number of shares in issue last year was 766.909.
==> 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.
Joby Aviation's gross margin of this year was 0.37957718. Joby Aviation's gross margin of last year was 0.53846154.
==> 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
Joby Aviation's asset turnover of this year was 0.06637267. Joby Aviation's asset turnover of last year was 9.709E-5.
==> 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
Joby Aviation has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
Joby Aviation (STU:8TQ) has a Piotroski F-Score of 3 as of Jul. 29, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Joby Aviation and its competitors. This is near median its historical median of 3.00. Over the past decade, Joby Aviation's Piotroski F-Score has ranged from 1.00 to 4.00. According to the industry distribution chart, Joby Aviation ranks #866 out of 978 companies in the Transportation industry, placing it in the top 88.5%.
Is Joby Aviation's Piotroski F-Score too high?
Joby Aviation's current Piotroski F-Score of 3 is near median its 10-year median of 3.00. Over the past 10 years, this metric has ranged from a low of 1.00 to a high of 4.00. The Transportation industry median Piotroski F-Score is 6.00. Joby Aviation's value of 3 is 50% below this industry median. Based on the distribution chart, Joby Aviation ranks #866 out of 978 companies in the Transportation industry, which is in the bottom quartile relative to peers. Overall, Joby Aviation has a GF Score™ of 30/100, reflecting its overall financial health beyond just this single metric.
How does Joby Aviation's Piotroski F-Score compare to CAAP and ASLE?
According to the Transportation industry distribution chart, Joby Aviation ranks #866 out of 978 companies for Piotroski F-Score. This places Joby Aviation in the lower half of its industry. The industry median Piotroski F-Score is 6.00. Joby Aviation's value of 3 is 50% below this benchmark. Historically, Joby Aviation's own Piotroski F-Score has ranged from 1.00 to 4.00 over the past decade. While the company's 10-year median is 3.00 vs. the industry median of 6.00, Joby Aviation 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 Transportation company?
The median Piotroski F-Score among Transportation companies is 6.00, based on 978 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. Joby Aviation's current Piotroski F-Score of 3 is 50% 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 Joby Aviation 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. Joby Aviation's current Piotroski F-Score is 3, which is near median its own 10-year median of 3.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Joby Aviation stock overvalued right now?
Joby Aviation (STU:8TQ) has a current Piotroski F-Score of 3. The current Piotroski F-Score is 3, which is near median its 10-year median of 3.00 and 50% below the Transportation industry median of 6.00. Joby Aviation's overall GF Score™ is 30/100 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 Joby Aviation (STU:8TQ), the current Piotroski F-Score is 3 as of Jul. 29, 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.
Joby Aviation Inc is a transportation company developing an all-electric, vertical take-off and landing (eVTOL) air taxi for commercial passenger service. Its Joby eVTOL aircraft is designed to transport a pilot and up to four passengers or an expected payload of up to 1,000 pounds at speeds of up to 200 mph. The aircraft is optimized for urban routes, with a target range of up to 100 miles on a single charge. The company is also developing an app-based platform that will help consumers to book rides directly through its service. It has one operating and reportable segment, air transportation and related services. The company's revenue consists of passenger revenue, which includes revenue generated from the transportation of passengers via helicopter or fixed wing aircraft.
30GF Score
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