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.
The pretax margin, as know as pretax profit margin, is widely used to measure the operating efficiency of a company before deducting taxes.
The pretax margin is sometimes preferred over the net margin as tax expenditures can make profitability comparisons between companies misleading.
It is a useful tool to compare companies operating in the same sector and less effective when comparing companies from other sectors as each industry generally has different operating expenses and sales patterns.
The long term trend of the pretax margin is a good indicator of the competitiveness and health of the business.
JMicron Technology Pretax Margin % Related Terms
JMicron Technology Pretax Margin % Historical Data
* Premium members only.
The historical data trend for JMicron Technology's Pretax Margin % 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.
ROCO:4925 vs NVDA, AVGO, MU: Pretax Margin % Comparison
For the Semiconductors subindustry, JMicron Technology's Pretax Margin %, along with its competitors' market caps and Pretax Margin % 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.
JMicron Technology Pretax Margin % vs Semiconductors Industry
For the Semiconductors industry and Technology sector, JMicron Technology's Pretax Margin % distribution charts can be found below:
* The bar in red indicates where JMicron Technology's Pretax Margin % 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.
JMicron Technology (ROCO:4925) has a Pretax Margin % of -3.58% as of Dec. 2025. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on JMicron Technology and its competitors. According to the industry distribution chart, JMicron Technology ranks #929 out of 1023 companies in the Semiconductors industry, placing it in the top 90.8%.
Is JMicron Technology's Pretax Margin % too high?
JMicron Technology's current Pretax Margin % is -3.58%. Based on the distribution chart, JMicron Technology ranks #929 out of 1023 companies in the Semiconductors industry, which is in the bottom quartile relative to peers. Overall, JMicron Technology has a GF Score™ of 39/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does JMicron Technology's Pretax Margin % compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, JMicron Technology ranks #929 out of 1023 companies for Pretax Margin %. This places JMicron Technology in the lower half of its industry. The industry median Pretax Margin % is 5.07. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Pretax Margin % for a Semiconductors company?
The median Pretax Margin % among Semiconductors companies is 5.07, based on 1,023 companies in the industry. Companies in the top quartile (top 25%) have a Pretax Margin % significantly above this median, while those in the bottom quartile fall well below. However, Pretax Margin % 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 Pretax Margin % mean?
A high Pretax Margin % can signal that a stock is expensive relative to its fundamentals. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on JMicron Technology and its competitors. For the Semiconductors industry, the median Pretax Margin % is 5.07 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. JMicron Technology's current Pretax Margin % is -3.58%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is JMicron Technology stock overvalued right now?
Based on GuruFocus' analysis, JMicron Technology (ROCO:4925) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$40.40, compared to a current price of NT$118.00 — trading 192.1% above its estimated fair value. The current Pretax Margin % is -3.58%. JMicron Technology's overall GF Score™ is 39/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Pretax Margin % calculated?
Pretax Margin % is calculated from a company's financial statements. For JMicron Technology (ROCO:4925), the current Pretax Margin % is -3.58% as of Dec. 2025. 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 JMicron Technology (ROCO:4925) Overvalued in 2026?
Based on GuruFocus' analysis, JMicron Technology stock appears to be overvalued.
The current stock price of NT$118.00 is trading 192.1% above its estimated GF Value™ of NT$40.40.
GuruFocus considers JMicron Technology to be Significantly Overvalued.
Key valuation signals for ROCO:4925:
Pretax Margin %: -3.58%
GF Value™: NT$40.40 vs. price of NT$118.00 (192.1% above fair value)
No single metric tells the full story. See the ROCO:4925 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
JMicron Technology Corp operates as a fabless IC company that specializes in designing high-speed data and signal interfaces. It offers bridge controller series that offers a range of high-speed and super-speed FireWire and SATAII/III interfaces for data storage applications.
39GF Score
Get the complete analysis for ROCO:4925
Pretax Margin % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
ROCO:4925 has been successfully added to your 
