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Castle BiosciencesCSTL +8.71%81 Earnings Yield (Joel Greenblatt) % is -3.36% as of Mar. 2026. GuruFocus rates CSTL with a GF Score™ of 81/100 and a GF Value™ of $29.23 (Modestly Undervalued). The stock has 4 warning signs investors should review. Among 213 Medical Diagnostics & Research companies, Castle Biosciences ranks worse than 60.09% on this metric.
Castle Biosciences's Enterprise Value for the quarter that ended in Mar. 2026 was $518.8 Mil.
Castle Biosciences's EBIT for the trailing twelve months (TTM) ended in Mar. 2026 was $-17.5 Mil. Castle Biosciences's Earnings Yield (Joel Greenblatt) for the quarter that ended in Mar. 2026 was -3.36%.
The historical rank and industry rank for Castle Biosciences's Earnings Yield (Joel Greenblatt) % or its related term are showing as below:
CSTL'
s Earnings Yield (Joel Greenblatt) % Range Over the Past 10 Years
Min: -64.43 Med: -2.6 Max: 6.88
Current: -3
During the past 9 years, the highest Earnings Yield (Joel Greenblatt) of Castle Biosciences was 6.88%. The lowest was -64.43%. And the median was -2.60%.
CSTL's Earnings Yield (Joel Greenblatt) % is ranked worse than 60.09% of 213
companies
in the Medical Diagnostics & Research industry
Industry Median: -0.42
vs CSTL: -3.00
Joel Greenblatt's definition of earnings yield has the same problems the regular earnings yield does. It does not consider the growth of the company. It only looks at one-year's business operation. For cyclical companies, the earnings yield is usually highest at the peak of the business cycle. But these earnings are rarely sustainable.
A better indicator of the attractiveness of an investment which takes growth into account is the Forward Rate of Return (Yacktman) %. Castle Biosciences's Forward Rate of Return (Yacktman) % for the quarter that ended in Mar. 2026 was 0.00%. The Forward Rate of Return uses the normalized Free Cash Flow of the past five years, and considers growth. The forward rate of return can be thought of as the return that investors buying the stock today can expect from it in the future.
Joel Greenblatt defines the earnings yield using the above equation because it more accurately reflects the company's profitability relative to its stock price. Items like interest payment and tax etc. are not directly related to the company's operational profitability.
Enterprise Value instead of market cap (share price) is used in the calculation because it is the real price stock and bond investors together pay for the company.
Be Aware
Joel Greenblatt's definition of earnings yield has the same problems the regular earnings yield does. It does not consider the growth of the company. It only looks at one-year's business operation. For cyclical companies, the earnings yield is usually highest at the peak of the business cycle. But these earnings are rarely sustainable.
Castle Biosciences Earnings Yield (Joel Greenblatt) % Related Terms
Castle Biosciences Earnings Yield (Joel Greenblatt) % Historical Data
* Premium members only.
The historical data trend for Castle Biosciences's Earnings Yield (Joel Greenblatt) % 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.
For the Diagnostics & Research subindustry, Castle Biosciences's Earnings Yield (Joel Greenblatt) %, along with its competitors' market caps and Earnings Yield (Joel Greenblatt) % 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.
Castle Biosciences Earnings Yield (Joel Greenblatt) % vs Medical Diagnostics & Research Industry
For the Medical Diagnostics & Research industry and Healthcare sector, Castle Biosciences's Earnings Yield (Joel Greenblatt) % distribution charts can be found below:
* The bar in red indicates where Castle Biosciences's Earnings Yield (Joel Greenblatt) % falls into.
In his book, The Little That Beat the Market, hedge fund manager Joel Greenblatt defines Earnings Yield as operating income divided by enterprise value.
Castle Biosciencess Earnings Yield (Joel Greenblatt) for the fiscal year that ended in Dec. 2025 is calculated as
Castle Biosciences's EBIT for the trailing twelve months (TTM) ended in Mar. 2026 adds up the quarterly data reported by the company within the most recent 12 months, which was $-17.5 Mil.
What does a Earnings Yield (Joel Greenblatt) % of -3.36% mean?
Castle Biosciences (CSTL) has a Earnings Yield (Joel Greenblatt) % of -3.36% as of Mar. 2026. Joel Greenblatt's earnings yield equals the ratio of earnings before interest and taxes to enterprise value. View historical data on Castle Biosciences and its competitors. According to the industry distribution chart, Castle Biosciences ranks #128 out of 213 companies in the Medical Diagnostics & Research industry, placing it in the top 60.1%.
Is Castle Biosciences' Earnings Yield (Joel Greenblatt) % too high?
Castle Biosciences' current Earnings Yield (Joel Greenblatt) % is -3.36%. Based on the distribution chart, Castle Biosciences ranks #128 out of 213 companies in the Medical Diagnostics & Research industry, which is below the industry midpoint. Overall, Castle Biosciences has a GF Score™ of 81/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Castle Biosciences' Earnings Yield (Joel Greenblatt) % compare to OPK and FLGT?
According to the Medical Diagnostics & Research industry distribution chart, Castle Biosciences ranks #128 out of 213 companies for Earnings Yield (Joel Greenblatt) %. This places Castle Biosciences in the lower half of its industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Earnings Yield (Joel Greenblatt) % for a Medical Diagnostics & Research company?
A good Earnings Yield (Joel Greenblatt) % depends on the Medical Diagnostics & Research industry context. However, Earnings Yield (Joel Greenblatt) % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Earnings Yield (Joel Greenblatt) % mean?
A high Earnings Yield (Joel Greenblatt) % can signal that a stock is expensive relative to its fundamentals. Joel Greenblatt's earnings yield equals the ratio of earnings before interest and taxes to enterprise value. View historical data on Castle Biosciences and its competitors. Castle Biosciences's current Earnings Yield (Joel Greenblatt) % is -3.36%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Castle Biosciences stock overvalued right now?
Based on GuruFocus' analysis, Castle Biosciences (CSTL) is currently considered Modestly Undervalued. The stock's GF Value™ is $29.23, compared to a current price of $26.59 — trading 9% below its estimated fair value. The current Earnings Yield (Joel Greenblatt) % is -3.36%. Castle Biosciences' overall GF Score™ is 81/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Earnings Yield (Joel Greenblatt) % calculated?
Earnings Yield (Joel Greenblatt) % is calculated from a company's financial statements. For Castle Biosciences (CSTL), the current Earnings Yield (Joel Greenblatt) % is -3.36% as of Mar. 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 Castle Biosciences (CSTL) Overvalued in 2026?
Based on GuruFocus' analysis, Castle Biosciences stock appears to be undervalued.
The current stock price of $26.59 is trading 9% below its estimated GF Value™ of $29.23.
GuruFocus considers Castle Biosciences to be Modestly Undervalued.
Key valuation signals for CSTL:
Earnings Yield (Joel Greenblatt) %: -3.36%
GF Value™: $29.23 vs. price of $26.59 (9% below fair value)
No single metric tells the full story. See the CSTL stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Castle Biosciences Inc is a molecular diagnostics company. The group provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), and uveal melanoma. The product portfolio of the company includes DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test; DecisionDx-SCC, a risk stratification test for cutaneous squamous cell carcinoma; MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions; and TissueCypher, a test to predict future development of progression of high-grade dysplasia and/or esophageal cancer. The company derives revenues through the delivery of test reports for its molecular diagnostic tests.
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