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.
Asia Optical CoTPE:3019 +2.79%86 Days Inventory is 82.58 as of Dec. 2025, which is 18% above its 10-year median of 70.09. GuruFocus rates TPE:3019 with a GF Score™ of 86/100 and a GF Value™ of NT$138.21 (Fairly Valued). The stock has 1 warning sign investors should review. Among 2,420 Hardware companies, Asia Optical Co ranks better than 61.28% on this metric.
The historical rank and industry rank for Asia Optical Co's Days Inventory or its related term are showing as below:
TPE:3019'
s Days Inventory Range Over the Past 10 Years
Min: 62.22 Med: 70.09 Max: 86.14
Current: 77.77
During the past 13 years, Asia Optical Co's highest Days Inventory was 86.14. The lowest was 62.22. And the median was 70.09.
TPE:3019's Days Inventory is ranked better than 61.28% of 2420
companies
in the Hardware industry
Industry Median: 94.265
vs TPE:3019: 77.77
Asia Optical Co's Days Inventory
increased
from Dec. 2024 (63.08) to Dec. 2025 (82.58).
It might indicate that Asia Optical Co's sales slowed down.
Inventory Turnover measures how fast the company turns over its inventory within a year.
Asia Optical Co's Inventory Turnover for the
three
months ended in Dec. 2025 was 1.10.
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.
Asia Optical Co's Inventory-to-Revenue for the
three
months ended in Dec. 2025 was 0.76.
Asia Optical Co (TPE:3019) 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.
Asia Optical Co'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.
Asia Optical Co'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.
Asia Optical Co Days Inventory Related Terms
Asia Optical Co Days Inventory Historical Data
* Premium members only.
The historical data trend for Asia Optical Co'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.
For the Electronic Components subindustry, Asia Optical Co'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.
Asia Optical Co Days Inventory vs Hardware Industry
For the Hardware industry and Technology sector, Asia Optical Co's Days Inventory distribution charts can be found below:
* The bar in red indicates where Asia Optical Co'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.
Asia Optical Co (TPE:3019) has a Days Inventory of 82.58 as of Dec. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Asia Optical Co and its competitors. This is 18% above median its historical median of 70.09. Over the past decade, Asia Optical Co's Days Inventory has ranged from 62.22 to 86.14. According to the industry distribution chart, Asia Optical Co ranks #937 out of 2420 companies in the Hardware industry, placing it in the top 38.7%.
Is Asia Optical Co's Days Inventory too high?
Asia Optical Co's current Days Inventory of 82.58 is 18% above median its 10-year median of 70.09. Over the past 10 years, this metric has ranged from a low of 62.22 to a high of 86.14. The Hardware industry median Days Inventory is 94.27. Asia Optical Co's value of 82.58 is 12.4% below this industry median. Based on the distribution chart, Asia Optical Co ranks #937 out of 2420 companies in the Hardware industry, which is above the industry midpoint. Overall, Asia Optical Co has a GF Score™ of 86/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Asia Optical Co's Days Inventory compare to APH and GLW?
According to the Hardware industry distribution chart, Asia Optical Co ranks #937 out of 2420 companies for Days Inventory. This puts Asia Optical Co in the upper half of its industry. The industry median Days Inventory is 94.27. Asia Optical Co's value of 82.58 is 12.4% below this benchmark. Historically, Asia Optical Co's own Days Inventory has ranged from 62.22 to 86.14 over the past decade. While the company's 10-year median is 70.09 vs. the industry median of 94.27, Asia Optical Co has consistently been below 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 Hardware company?
The median Days Inventory among Hardware companies is 94.27, based on 2,420 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. Asia Optical Co's current Days Inventory of 82.58 is 12.4% below 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 Asia Optical Co and its competitors. For the Hardware industry, the median Days Inventory is 94.27 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Asia Optical Co's current Days Inventory is 82.58, which is 18% above median its own 10-year median of 70.09. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Asia Optical Co stock overvalued right now?
Based on GuruFocus' analysis, Asia Optical Co (TPE:3019) is currently considered Fairly Valued. The stock's GF Value™ is NT$138.21, compared to a current price of NT$147.50 — trading 6.7% above its estimated fair value. The current Days Inventory is 82.58, which is 18% above median its 10-year median of 70.09 and 12.4% below the Hardware industry median of 94.27. Asia Optical Co's overall GF Score™ is 86/100 with 1 warning sign 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 Asia Optical Co (TPE:3019), the current Days Inventory is 82.58 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 Asia Optical Co (TPE:3019) Overvalued in 2026?
Based on GuruFocus' analysis, Asia Optical Co stock appears to be overvalued.
The current stock price of NT$147.50 is trading 6.7% above its estimated GF Value™ of NT$138.21.
GuruFocus considers Asia Optical Co to be Fairly Valued.
Key valuation signals for TPE:3019:
Days Inventory: 82.58 (18% above median its 10-year median of 70.09)
GF Value™: NT$138.21 vs. price of NT$147.50 (6.7% above fair value)
Industry Position: 12.4% below the Hardware median (#937 of 2420)
No single metric tells the full story. See the TPE:3019 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Asia Optical Co Inc is engaged in the manufacturing and sale of cameras, rangefinders, riflescopes, photocopier lens, scanner lens and optical components. The companies reportable segments included optical components, contact image sensor modules, optronics components, optronics products and digital camera. The majority of the revenue is generated from optical components. The company operates in two principal geographical areas Asia and America.
86GF Score
Get the complete analysis for TPE:3019
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
TPE:3019 has been successfully added to your 
