Formosa Electronic Industries (ROCO:8171) Days Inventory: 135.20 (As of Dec. 2025) — Near Median

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
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.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
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.

ROCO:8171 Formosa Electronic Industries Inc ROCO:8171
38 GF Score
Price NT$20.50
GF Value NT$7.94
Valuation Significantly Overvalued
! 7 Warning Signs
View Full Analysis

What is Formosa Electronic Industries Days Inventory?

Formosa Electronic Industries ROCO:8171 -0.49% 38 Days Inventory is 135.20 as of Dec. 2025, which is 5% above its 10-year median of 128.90. GuruFocus rates ROCO:8171 with a GF Score™ of 38/100 and a GF Value™ of NT$7.94 (Significantly Overvalued). The stock has 7 warning signs investors should review. Among 2,417 Hardware companies, Formosa Electronic Industries ranks worse than 84.98% on this metric.

Days Inventory is also known as Days Sales of Inventory (DSI). Formosa Electronic Industries's Average Total Inventories for the three months ended in Dec. 2025 was NT$227.0 Mil. Formosa Electronic Industries's Cost of Goods Sold for the three months ended in Dec. 2025 was NT$153.2 Mil. Hence, Formosa Electronic Industries's Days Inventory for the three months ended in Dec. 2025 was 135.20.

The historical rank and industry rank for Formosa Electronic Industries's Days Inventory or its related term are showing as below:

ROCO:8171' s Days Inventory Range Over the Past 10 Years
Min: 67.49   Med: 128.9   Max: 438.24
Current: 214

During the past 13 years, Formosa Electronic Industries's highest Days Inventory was 438.24. The lowest was 67.49. And the median was 128.90.

ROCO:8171's Days Inventory is ranked worse than
84.98% of 2417 companies
in the Hardware industry
Industry Median: 94.06 vs ROCO:8171: 214.00

Formosa Electronic Industries's Days Inventory declined from Dec. 2024 (189.39) to Dec. 2025 (135.20).

Warning Sign:

If a company builds up inventory, it may mean it is having difficulties selling its goods.

Inventory Turnover measures how fast the company turns over its inventory within a year. Formosa Electronic Industries's Inventory Turnover for the three months ended in Dec. 2025 was 0.67.

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. Formosa Electronic Industries's Inventory-to-Revenue for the three months ended in Dec. 2025 was 1.95.


Formosa Electronic Industries  (ROCO:8171) 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.

Formosa Electronic Industries'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.

Formosa Electronic Industries'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.


Formosa Electronic Industries Days Inventory Related Terms


Formosa Electronic Industries Days Inventory Historical Data

* Premium members only.

The historical data trend for Formosa Electronic Industries'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.

Formosa Electronic Industries Days Inventory Chart

Formosa Electronic Industries Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Days Inventory
Get a 7-Day Free Trial Premium Member Only Premium Member Only 93.84 107.40 196.51 126.96 233.15

Formosa Electronic Industries Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
Days Inventory Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 189.39 230.30 205.55 440.12 135.20

ROCO:8171 vs APH, GLW: Days Inventory Comparison

For the Electronic Components subindustry, Formosa Electronic Industries'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.


Formosa Electronic Industries Days Inventory vs Hardware Industry

For the Hardware industry and Technology sector, Formosa Electronic Industries's Days Inventory distribution charts can be found below:

* The bar in red indicates where Formosa Electronic Industries's Days Inventory falls into.


ROCO:8171
38GF Score
Formosa Electronic Industries Inc ROCO:8171
Days Inventory is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Formosa Electronic Industries Days Inventory Calculation

Days Inventory indicates the number of days of goods in sales that a company has in the inventory.

Formosa Electronic Industries's Days Inventory for the fiscal year that ended in Dec. 2025 is calculated as

Days Inventory (A: Dec. 2025 )
=Average Total Inventories / Cost of Goods Sold*Days in Period
=( (Total Inventories (A: Dec. 2024 ) + Total Inventories (A: Dec. 2025 )) / count ) / Cost of Goods Sold (A: Dec. 2025 )*Days in Period
=( (240.798 + 242.295) / 2 ) / 378.144*365
=241.5465 / 378.144*365
=233.15

Formosa Electronic Industries's Days Inventory for the quarter that ended in Dec. 2025 is calculated as:

Days Inventory (Q: Dec. 2025 )
=Average Total Inventories / Cost of Goods Sold*Days in Period
=( (Total Inventories (Q: Sep. 2025 ) + Total Inventories (Q: Dec. 2025 )) / count ) / Cost of Goods Sold (Q: Dec. 2025 )*Days in Period
=( (211.731 + 242.295) / 2 ) / 153.215*365 / 4
=227.013 / 153.215*365 / 4
=135.20

* 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.

Frequently Asked Questions Learn more about Days Inventory →
What does a Days Inventory of 135.20 mean?
Formosa Electronic Industries (ROCO:8171) has a Days Inventory of 135.20 as of Dec. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Formosa Electronic Industries and its competitors. This is near median its historical median of 128.90. Over the past decade, Formosa Electronic Industries' Days Inventory has ranged from 67.49 to 438.24. According to the industry distribution chart, Formosa Electronic Industries ranks #2054 out of 2417 companies in the Hardware industry, placing it in the top 85%.
Is Formosa Electronic Industries' Days Inventory too high?
Formosa Electronic Industries' current Days Inventory of 135.20 is near median its 10-year median of 128.90. Over the past 10 years, this metric has ranged from a low of 67.49 to a high of 438.24. The Hardware industry median Days Inventory is 94.06. Formosa Electronic Industries' value of 135.20 is 43.7% above this industry median. Based on the distribution chart, Formosa Electronic Industries ranks #2054 out of 2417 companies in the Hardware industry, which is in the bottom quartile relative to peers. Overall, Formosa Electronic Industries has a GF Score™ of 38/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Formosa Electronic Industries' Days Inventory compare to APH and GLW?
According to the Hardware industry distribution chart, Formosa Electronic Industries ranks #2054 out of 2417 companies for Days Inventory. This places Formosa Electronic Industries in the lower half of its industry. The industry median Days Inventory is 94.06. Formosa Electronic Industries' value of 135.20 is 43.7% above this benchmark. Historically, Formosa Electronic Industries' own Days Inventory has ranged from 67.49 to 438.24 over the past decade. While the company's 10-year median is 128.90 vs. the industry median of 94.06, Formosa Electronic Industries 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 Hardware company?
The median Days Inventory among Hardware companies is 94.06, based on 2,417 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. Formosa Electronic Industries's current Days Inventory of 135.20 is 43.7% 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 Formosa Electronic Industries and its competitors. For the Hardware industry, the median Days Inventory is 94.06 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Formosa Electronic Industries's current Days Inventory is 135.20, which is near median its own 10-year median of 128.90. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Formosa Electronic Industries stock overvalued right now?
Based on GuruFocus' analysis, Formosa Electronic Industries (ROCO:8171) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$7.94, compared to a current price of NT$20.50 — trading 158.2% above its estimated fair value. The current Days Inventory is 135.20, which is near median its 10-year median of 128.90 and 43.7% above the Hardware industry median of 94.06. Formosa Electronic Industries' overall GF Score™ is 38/100 with 7 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 Formosa Electronic Industries (ROCO:8171), the current Days Inventory is 135.20 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 Formosa Electronic Industries (ROCO:8171) Overvalued in 2026?

Based on GuruFocus' analysis, Formosa Electronic Industries stock appears to be overvalued. The current stock price of NT$20.50 is trading 158.2% above its estimated GF Value™ of NT$7.94. GuruFocus considers Formosa Electronic Industries to be Significantly Overvalued.

Key valuation signals for ROCO:8171:

  • Days Inventory: 135.20 (near median its 10-year median of 128.90)
  • GF Value™: NT$7.94 vs. price of NT$20.50 (158.2% above fair value)
  • GF Score™: 38/100 with 7 warning signs
  • Industry Position: 43.7% above the Hardware median (#2054 of 2417)

No single metric tells the full story. See the ROCO:8171 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Formosa Electronic Industries Business Description

Address No. 8, Lane 130, Minquan Road, 5th Floor, Xindian District, Taipei Hsien, TWN
Formosa Electronic Industries Inc is engaged in the assembly, processing, manufacturing, trading, agent distribution, and trading of single-string parallel battery modules, mobile power supplies, wireless chargers, green energy battery modules, and distributed energy storage systems. The Company's other products include wireless chargers, power adapters, accessories, OEM, and green products.
38GF Score

Get the complete analysis for ROCO:8171

Days Inventory is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

NT$20.50
Price
NT$7.94
GF Value