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.
Zen VoceROCO:3581 -4.33%56 Days Inventory is 147.42 as of Dec. 2025, which is 18% below its 10-year median of 179.56. GuruFocus rates ROCO:3581 with a GF Score™ of 56/100 and a GF Value™ of NT$38.01 (Significantly Overvalued). The stock has 2 warning signs investors should review. Among 983 Semiconductors companies, Zen Voce ranks worse than 77.21% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). Zen Voce's Average Total Inventories for the
three
months ended in Dec. 2025 was NT$550 Mil. Zen Voce's Cost of Goods Sold for the
three
months ended in Dec. 2025 was NT$340 Mil.
Hence, Zen Voce's Days Inventory for the
three
months ended in Dec. 2025 was 147.42.
The historical rank and industry rank for Zen Voce's Days Inventory or its related term are showing as below:
ROCO:3581'
s Days Inventory Range Over the Past 10 Years
Min: 125.5 Med: 179.56 Max: 220.43
Current: 196.95
During the past 13 years, Zen Voce's highest Days Inventory was 220.43. The lowest was 125.50. And the median was 179.56.
ROCO:3581's Days Inventory is ranked worse than 77.21% of 983
companies
in the Semiconductors industry
Industry Median: 112.18
vs ROCO:3581: 196.95
Zen Voce's Days Inventory
declined
from Dec. 2024 (216.93) to Dec. 2025 (147.42).
Inventory Turnover measures how fast the company turns over its inventory within a year.
Zen Voce's Inventory Turnover for the
three
months ended in Dec. 2025 was 0.62.
Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
Zen Voce's Inventory-to-Revenue for the
three
months ended in Dec. 2025 was 1.10.
Zen Voce (ROCO:3581) Days Inventory Explanation
Days Inventory indicates the liquidity of the inventory. Generally, a lower Days Inventory is preferred as it indicates a shorter duration to clear off the inventory. An increase of the ratio may indicate the company's sales slowed. Similar ratios related to Days Inventory are:
1. Inventory Turnover measures how fast the company turns over its inventory within a year.
Zen Voce's Inventory Turnover for the
three
months ended in Dec. 2025 is calculated as
2. Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
Zen Voce's Inventory to Revenue for the
three
months ended in Dec. 2025 is calculated as
* 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.
Be Aware
A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.
Zen Voce Days Inventory Related Terms
Zen Voce Days Inventory Historical Data
* Premium members only.
The historical data trend for Zen Voce's Days Inventory 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:3581 vs NVDA, AVGO, MU: Days Inventory Comparison
For the Semiconductors subindustry, Zen Voce's Days Inventory, along with its competitors' market caps and Days Inventory 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.
Zen Voce Days Inventory vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Zen Voce's Days Inventory distribution charts can be found below:
* The bar in red indicates where Zen Voce's Days Inventory 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.
Zen Voce (ROCO:3581) has a Days Inventory of 147.42 as of Dec. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Zen Voce and its competitors. This is 18% below median its historical median of 179.56. Over the past decade, Zen Voce's Days Inventory has ranged from 125.50 to 220.43. According to the industry distribution chart, Zen Voce ranks #759 out of 983 companies in the Semiconductors industry, placing it in the top 77.2%.
Is Zen Voce's Days Inventory too high?
Zen Voce's current Days Inventory of 147.42 is 18% below median its 10-year median of 179.56. Over the past 10 years, this metric has ranged from a low of 125.50 to a high of 220.43. The Semiconductors industry median Days Inventory is 112.18. Zen Voce's value of 147.42 is 31.4% above this industry median. Based on the distribution chart, Zen Voce ranks #759 out of 983 companies in the Semiconductors industry, which is in the bottom quartile relative to peers. Overall, Zen Voce has a GF Score™ of 56/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Zen Voce's Days Inventory compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, Zen Voce ranks #759 out of 983 companies for Days Inventory. This places Zen Voce in the lower half of its industry. The industry median Days Inventory is 112.18. Zen Voce's value of 147.42 is 31.4% above this benchmark. Historically, Zen Voce's own Days Inventory has ranged from 125.50 to 220.43 over the past decade. While the company's 10-year median is 179.56 vs. the industry median of 112.18, Zen Voce 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 Days Inventory for a Semiconductors company?
The median Days Inventory among Semiconductors companies is 112.18, based on 983 companies in the industry. Companies in the top quartile (top 25%) have a Days Inventory significantly above this median, while those in the bottom quartile fall well below. However, Days Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Zen Voce's current Days Inventory of 147.42 is 31.4% 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 Days Inventory mean?
A high Days Inventory can signal that a stock is expensive relative to its fundamentals. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Zen Voce and its competitors. For the Semiconductors industry, the median Days Inventory is 112.18 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Zen Voce's current Days Inventory is 147.42, which is 18% below median its own 10-year median of 179.56. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Zen Voce stock overvalued right now?
Based on GuruFocus' analysis, Zen Voce (ROCO:3581) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$38.01, compared to a current price of NT$110.50 — trading 190.7% above its estimated fair value. The current Days Inventory is 147.42, which is 18% below median its 10-year median of 179.56 and 31.4% above the Semiconductors industry median of 112.18. Zen Voce's overall GF Score™ is 56/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Days Inventory calculated?
Days Inventory is calculated from a company's financial statements. For Zen Voce (ROCO:3581), the current Days Inventory is 147.42 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 Zen Voce (ROCO:3581) Overvalued in 2026?
Based on GuruFocus' analysis, Zen Voce stock appears to be overvalued.
The current stock price of NT$110.50 is trading 190.7% above its estimated GF Value™ of NT$38.01.
GuruFocus considers Zen Voce to be Significantly Overvalued.
Key valuation signals for ROCO:3581:
Days Inventory: 147.42 (18% below median its 10-year median of 179.56)
GF Value™: NT$38.01 vs. price of NT$110.50 (190.7% above fair value)
Industry Position: 31.4% above the Semiconductors median (#759 of 983)
No single metric tells the full story. See the ROCO:3581 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Zen Voce Corp is a Taiwan based company engaged in the business of providing semiconductor, optoelectronics and MEMS and LCD's equipment. It offers equipment products which include IC packaging machine design and manufacture of bumping, wafer cutting machine and cleaning machine design and manufacturing, and board cutting machine and cleaning machine design and manufacturing. The test products provided by the company includes Wafer test probe card PCB design and manufacturing, IC test HIFIX and CHANG KIT design and manufacturing, SOCKET IC design and manufacturing test, Acting IC HANDLER, and Acting SOCKET IC burn-in test.
56GF Score
Get the complete analysis for ROCO:3581
Days Inventory 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:3581 has been successfully added to your 
