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The zones of discrimination for M-Score is as such:
An M-Score of equal or less than -1.78 suggests that the company is unlikely to be a manipulator.
An M-Score of greater than -1.78 signals that the company is likely to be a manipulator.
Good Sign:
Beneish M-Score -2.12 no higher than -1.78, which implies that the company is unlikely to be a manipulator.
The historical rank and industry rank for Amkor Technology's Beneish M-Score or its related term are showing as below:
STU:AMK'
s Beneish M-Score Range Over the Past 10 Years
Min: -3.2 Med: -2.72 Max: -2.12
Current: -2.12
During the past 13 years, the highest Beneish M-Score of Amkor Technology was -2.12. The lowest was -3.20. And the median was -2.72.
The historical data trend for Amkor Technology's Beneish M-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:AMK vs NVMI, ONTO, ENTG: Beneish M-Score Comparison
For the Semiconductor Equipment & Materials subindustry, Amkor Technology's Beneish M-Score, along with its competitors' market caps and Beneish M-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.
Amkor Technology Beneish M-Score vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Amkor Technology's Beneish M-Score distribution charts can be found below:
* The bar in red indicates where Amkor Technology's Beneish M-Score falls into.
The M-score was created by Professor Messod Beneish. Instead of measuring the bankruptcy risk (Altman Z-Score) or business trend (Piotroski F-Score), M-score can be used to detect the risk of earnings manipulation. This is the original research paper on M-score.
The M-Score Variables:
The M-score of Amkor Technology for today is based on a combination of the following eight different indices:
M
=
-4.84
+
0.92 * DSRI
+
0.528 * GMI
+
0.404 * AQI
+
0.892 * SGI
+
0.115 * DEPI
=
-4.84
+
0.92 * 1.1364
+
0.528 * 0.8772
+
0.404 * 2.3903
+
0.892 * 1.1117
+
0.115 * 1.1014
-
0.172 * SGAI
+
4.679 * TATA
-
0.327 * LVGI
-
0.172 * 1.0676
+
4.679 * -0.06471
-
0.327 * 1.1266
=
-2.10
* 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.
Sales growth is not itself a measure of manipulation. However, growth companies are likely to find themselves under pressure to manipulate in order to keep up appearances.
DEPI greater than 1 indicates that assets are being depreciated at a slower rate. This suggests that the firm might be revising useful asset life assumptions upwards, or adopting a new method that is income friendly.
DEPI
=
(Depreciation_t-1 / (Depreciaton_t-1 + PPE_t-1))
/
(Depreciation_t / (Depreciaton_t + PPE_t))
=
(558.166 / (558.166 + 3381.699))
/
(584.7 / (584.7 + 3961.023))
=
0.141671
/
0.128626
=
1.1014
Note: If the Depreciation, Depletion and Amortization data is not available, we assume that the depreciation rate is constant and set the Depreciation Index to 1.
6. SGAI = Sales, General and Administrative expenses Index
Total accruals calculated as the change in working capital accounts other than cash less depreciation.
TATA
=
(IncomefromContinuingOperations_t
-
CashFlowsfromOperations_t)
/
TotalAssets_t
=
(NetIncome_t - NonOperatingIncome_t
-
CashFlowsfromOperations_t)
/
TotalAssets_t
=
(477.455 - -1.541
-
1024.73)
/
8433.587
=
-0.06471
An M-Score of equal or less than -1.78 suggests that the company is unlikely to be a manipulator. An M-Score of greater than -1.78 signals that the company is likely to be a manipulator.
Amkor Technology has a M-score of -2.10 suggests that the company is unlikely to be a manipulator.
Amkor Technology (STU:AMK) has a Beneish M-Score of -2.12 as of Aug. 30, 2026. The Beneish M-score measures the likelihood of earnings manipulation. View historical data on Amkor Technology and its competitors. According to the industry distribution chart, Amkor Technology ranks #610 out of 993 companies in the Semiconductors industry, placing it in the top 61.4%.
Is Amkor Technology's Beneish M-Score too high?
Amkor Technology's current Beneish M-Score is -2.12. Based on the distribution chart, Amkor Technology ranks #610 out of 993 companies in the Semiconductors industry, which is below the industry midpoint. Overall, Amkor Technology has a GF Score™ of 84/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Amkor Technology's Beneish M-Score compare to NVMI and ONTO?
According to the Semiconductors industry distribution chart, Amkor Technology ranks #610 out of 993 companies for Beneish M-Score. This places Amkor Technology 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 Beneish M-Score for a Semiconductors company?
A good Beneish M-Score depends on the Semiconductors industry context. However, Beneish M-Score 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 Beneish M-Score mean?
A high Beneish M-Score can signal that a stock is expensive relative to its fundamentals. The Beneish M-score measures the likelihood of earnings manipulation. View historical data on Amkor Technology and its competitors. Amkor Technology's current Beneish M-Score is -2.12. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Amkor Technology stock overvalued right now?
Based on GuruFocus' analysis, Amkor Technology (STU:AMK) is currently considered Significantly Overvalued. The stock's GF Value™ is €31.28, compared to a current price of €41.31 — trading 32.1% above its estimated fair value. The current Beneish M-Score is -2.12. Amkor Technology's overall GF Score™ is 84/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Beneish M-Score calculated?
Beneish M-Score is calculated from a company's financial statements. For Amkor Technology (STU:AMK), the current Beneish M-Score is -2.12 as of Aug. 30, 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 Amkor Technology (STU:AMK) Overvalued in 2026?
Based on GuruFocus' analysis, Amkor Technology stock appears to be overvalued.
The current stock price of €41.31 is trading 32.1% above its estimated GF Value™ of €31.28.
GuruFocus considers Amkor Technology to be Significantly Overvalued.
Key valuation signals for STU:AMK:
Beneish M-Score: -2.12
GF Value™: €31.28 vs. price of €41.31 (32.1% above fair value)
No single metric tells the full story. See the STU:AMK stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Amkor Technology Inc is a OSAT (outsourced semiconductor assembly and test) service provider. It has pioneered the outsourcing of integrated circuit (IC) packaging and test services and is a strategic manufacturing partner for the semiconductor companies, foundries, and electronics original equipment manufacturers (OEMs). The firm's products are organized into two categories namely advanced products that include flip chip, fine pitch bumping, wafer-level processing, advanced SiPs, power modules, and others, and Mainstream products that includes wirebond packaging and testing. The company derives maximum revenue from the advanced products category. The company derives majority of its revenue from Foreign states.
84GF Score
Get the complete analysis for STU:AMK
Beneish M-Score is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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