Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
Amtech SystemsSTU:AS3 -1.50%56 OCF Yield % is 3.63 as of Aug. 11, 2026, which is 303% above its 10-year median of 0.90. GuruFocus rates STU:AS3 with a GF Score™ of 56/100 and a GF Value™ of €3.82 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 1,029 Semiconductors companies, Amtech Systems ranks better than 67.64% on this metric.
OCF Yield % is calculated as Cash Flow from Operations divided by Market Capitalization. It is a financial solvency ratio that compares the operating cash flow a company is expected to earn against its market value.
Similar to Earnings Yield %, OCF Yield % is financial solvency ratio. A lower ratio suggests a less attractive investment, indicating that investors might not receive substantial returns in proportion to their investment. Conversely, a high operating cash flow yield signals that a company generates sufficient cash to comfortably meet its debts, obligations, and dividend payments, making it a promising investment choice.
Amtech Systems OCF Yield % Related Terms
Amtech Systems OCF Yield % Historical Data
* Premium members only.
The historical data trend for Amtech Systems's OCF Yield % 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:AS3 vs ATOM, INTT, TRT: OCF Yield % Comparison
For the Semiconductor Equipment & Materials subindustry, Amtech Systems's OCF Yield %, along with its competitors' market caps and OCF Yield % 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.
Amtech Systems OCF Yield % vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Amtech Systems's OCF Yield % distribution charts can be found below:
* The bar in red indicates where Amtech Systems's OCF Yield % 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.
Amtech Systems (STU:AS3) has a OCF Yield % of 3.63 as of Aug. 11, 2026. OCF Yield is calculated as Cash Flow from Operations divided by Market Capitalization. View historical data on Amtech Systems and its competitors. This is 303% above median its historical median of 0.90. According to the industry distribution chart, Amtech Systems ranks #333 out of 1029 companies in the Semiconductors industry, placing it in the top 32.4%.
Is Amtech Systems' OCF Yield % too high?
Amtech Systems' current OCF Yield % of 3.63 is 303% above median its 10-year median of 0.90. The Semiconductors industry median OCF Yield % is 1.61. Amtech Systems' value of 3.63 is 125.5% above this industry median. Based on the distribution chart, Amtech Systems ranks #333 out of 1029 companies in the Semiconductors industry, which is above the industry midpoint. Overall, Amtech Systems has a GF Score™ of 56/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Amtech Systems' OCF Yield % compare to ATOM and INTT?
According to the Semiconductors industry distribution chart, Amtech Systems ranks #333 out of 1029 companies for OCF Yield %. This puts Amtech Systems in the upper half of its industry. The industry median OCF Yield % is 1.61. Amtech Systems' value of 3.63 is 125.5% above this benchmark. While the company's 10-year median is 0.90 vs. the industry median of 1.61, Amtech Systems 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 OCF Yield % for a Semiconductors company?
The median OCF Yield % among Semiconductors companies is 1.61, based on 1,029 companies in the industry. Companies in the top quartile (top 25%) have a OCF Yield % significantly above this median, while those in the bottom quartile fall well below. However, OCF Yield % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Amtech Systems's current OCF Yield % of 3.63 is 125.5% 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 OCF Yield % mean?
A high OCF Yield % can signal that a stock is expensive relative to its fundamentals. OCF Yield is calculated as Cash Flow from Operations divided by Market Capitalization. View historical data on Amtech Systems and its competitors. For the Semiconductors industry, the median OCF Yield % is 1.61 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Amtech Systems's current OCF Yield % is 3.63, which is 303% above median its own 10-year median of 0.90. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Amtech Systems stock overvalued right now?
Based on GuruFocus' analysis, Amtech Systems (STU:AS3) is currently considered Significantly Overvalued. The stock's GF Value™ is €3.82, compared to a current price of €13.10 — trading 242.9% above its estimated fair value. The current OCF Yield % is 3.63, which is 303% above median its 10-year median of 0.90 and 125.5% above the Semiconductors industry median of 1.61. Amtech Systems' overall GF Score™ is 56/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is OCF Yield % calculated?
OCF Yield % is calculated from a company's financial statements. For Amtech Systems (STU:AS3), the current OCF Yield % is 3.63 as of Aug. 11, 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 Amtech Systems (STU:AS3) Overvalued in 2026?
Based on GuruFocus' analysis, Amtech Systems stock appears to be overvalued.
The current stock price of €13.10 is trading 242.9% above its estimated GF Value™ of €3.82.
GuruFocus considers Amtech Systems to be Significantly Overvalued.
Key valuation signals for STU:AS3:
OCF Yield %: 3.63 (303% above median its 10-year median of 0.90)
GF Value™: €3.82 vs. price of €13.10 (242.9% above fair value)
Industry Position: 125.5% above the Semiconductors median (#333 of 1029)
No single metric tells the full story. See the STU:AS3 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Amtech Systems Inc provides equipment, consumables and services for semiconductor device packaging, wafer production and device fabrication. Its products are used to fabricate and package GPUs for AI applications, SiC and Si power devices, and other optical, analog and digital devices, and are sold to semiconductor packaging, electronic assembly and device fabrication companies. It operates through two segments: Thermal Processing Solutions, which includes conveyorized reflow equipment, high-temperature conveyorized furnaces and diffusion furnaces with maximum revenue; and Semiconductor Fabrication Solutions, which includes consumables, equipment and services for wafer polishing, dicing and cleaning. The majority of revenue is derived from the United States.
56GF Score
Get the complete analysis for STU:AS3
OCF Yield % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
STU:AS3 has been successfully added to your 
