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.
National Petroleum CoTPE:9937 +0.18%78 Days Inventory is 5.28 as of Dec. 2025, which is 1% above its 10-year median of 5.25. GuruFocus rates TPE:9937 with a GF Score™ of 78/100 and a GF Value™ of NT$59.36 (Fairly Valued). The stock has 4 warning signs investors should review. Among 1,087 Retail - Cyclical companies, National Petroleum Co ranks better than 96.87% on this metric.
Inventory Turnover measures how fast the company turns over its inventory within a year.
National Petroleum Co's Inventory Turnover for the
three
months ended in Dec. 2025 was 17.28.
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.
National Petroleum Co's Inventory-to-Revenue for the
three
months ended in Dec. 2025 was 0.05.
National Petroleum Co (TPE:9937) 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.
National Petroleum 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.
National Petroleum 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.
National Petroleum Co Days Inventory Related Terms
National Petroleum Co Days Inventory Historical Data
* Premium members only.
The historical data trend for National Petroleum 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.
TPE:9937 vs CASY, WSM, DKS: Days Inventory Comparison
For the Specialty Retail subindustry, National Petroleum 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.
National Petroleum Co Days Inventory vs Retail - Cyclical Industry
For the Retail - Cyclical industry and Consumer Cyclical sector, National Petroleum Co's Days Inventory distribution charts can be found below:
* The bar in red indicates where National Petroleum 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.
National Petroleum Co (TPE:9937) has a Days Inventory of 5.28 as of Dec. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on National Petroleum Co and its competitors. This is near median its historical median of 5.25. Over the past decade, National Petroleum Co's Days Inventory has ranged from 4.08 to 6.40. According to the industry distribution chart, National Petroleum Co ranks #34 out of 1087 companies in the Retail - Cyclical industry, placing it in the top 3.1%.
Is National Petroleum Co's Days Inventory too high?
National Petroleum Co's current Days Inventory of 5.28 is near median its 10-year median of 5.25. Over the past 10 years, this metric has ranged from a low of 4.08 to a high of 6.40. The Retail - Cyclical industry median Days Inventory is 105.43. National Petroleum Co's value of 5.28 is 95% below this industry median. Based on the distribution chart, National Petroleum Co ranks #34 out of 1087 companies in the Retail - Cyclical industry, which is in the top quartile — a strong position relative to peers. Overall, National Petroleum Co has a GF Score™ of 78/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does National Petroleum Co's Days Inventory compare to CASY and WSM?
According to the Retail - Cyclical industry distribution chart, National Petroleum Co ranks #34 out of 1087 companies for Days Inventory. This places National Petroleum Co in the top 3% of its industry — outperforming the majority of peers. The industry median Days Inventory is 105.43. National Petroleum Co's value of 5.28 is 95% below this benchmark. Historically, National Petroleum Co's own Days Inventory has ranged from 4.08 to 6.40 over the past decade. While the company's 10-year median is 5.25 vs. the industry median of 105.43, National Petroleum 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 Retail - Cyclical company?
The median Days Inventory among Retail - Cyclical companies is 105.43, based on 1,087 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. National Petroleum Co's current Days Inventory of 5.28 is 95% 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 National Petroleum Co and its competitors. For the Retail - Cyclical industry, the median Days Inventory is 105.43 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. National Petroleum Co's current Days Inventory is 5.28, which is near median its own 10-year median of 5.25. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is National Petroleum Co stock overvalued right now?
Based on GuruFocus' analysis, National Petroleum Co (TPE:9937) is currently considered Fairly Valued. The stock's GF Value™ is NT$59.36, compared to a current price of NT$55.50 — trading 6.5% below its estimated fair value. The current Days Inventory is 5.28, which is near median its 10-year median of 5.25 and 95% below the Retail - Cyclical industry median of 105.43. National Petroleum Co's overall GF Score™ is 78/100 with 4 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 National Petroleum Co (TPE:9937), the current Days Inventory is 5.28 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 National Petroleum Co (TPE:9937) Overvalued in 2026?
Based on GuruFocus' analysis, National Petroleum Co stock appears to be undervalued.
The current stock price of NT$55.50 is trading 6.5% below its estimated GF Value™ of NT$59.36.
GuruFocus considers National Petroleum Co to be Fairly Valued.
Key valuation signals for TPE:9937:
Days Inventory: 5.28 (near median its 10-year median of 5.25)
GF Value™: NT$59.36 vs. price of NT$55.50 (6.5% below fair value)
Industry Position: 95% below the Retail - Cyclical median (#34 of 1087)
No single metric tells the full story. See the TPE:9937 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
National Petroleum Co Ltd is engaged in providing and selling gasoline, diesel, and lubricant, as well as car washing services. The main revenue of the Group is generated from the sales of refined petroleum products supplied and sold through the Group's gas stations. The sales targets are mainly consumers at gas stations.
78GF Score
Get the complete analysis for TPE:9937
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:9937 has been successfully added to your 
