Harmonic Drive SystemsHSYDF -6.92%70 Days Inventory is 99.73 as of Mar. 2026, which is 15% above its 10-year median of 87.00. GuruFocus rates HSYDF with a GF Score™ of 70/100 and a GF Value™ of $23.39 (Significantly Overvalued). The stock has 10 warning signs investors should review. Among 2,972 Industrial Products companies, Harmonic Drive Systems ranks better than 54% on this metric.
The historical rank and industry rank for Harmonic Drive Systems's Days Inventory or its related term are showing as below:
HSYDF'
s Days Inventory Range Over the Past 10 Years
Min: 63.48 Med: 87 Max: 114.12
Current: 110.73
During the past 13 years, Harmonic Drive Systems's highest Days Inventory was 114.12. The lowest was 63.48. And the median was 87.00.
HSYDF's Days Inventory is ranked better than 54% of 2972
companies
in the Industrial Products industry
Industry Median: 119.385
vs HSYDF: 110.73
Harmonic Drive Systems's Days Inventory
declined
from Mar. 2025 (102.01) to Mar. 2026 (99.73).
Inventory Turnover measures how fast the company turns over its inventory within a year.
Harmonic Drive Systems's Inventory Turnover for the
three
months ended in Mar. 2026 was 0.91.
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.
Harmonic Drive Systems's Inventory-to-Revenue for the
three
months ended in Mar. 2026 was 0.74.
Harmonic Drive Systems (OTCPK:HSYDF) 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.
Harmonic Drive Systems's Inventory Turnover for the
three
months ended in Mar. 2026 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.
Harmonic Drive Systems's Inventory to Revenue for the
three
months ended in Mar. 2026 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.
Harmonic Drive Systems Days Inventory Related Terms
Harmonic Drive Systems Days Inventory Historical Data
* Premium members only.
The historical data trend for Harmonic Drive Systems'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 Specialty Industrial Machinery subindustry, Harmonic Drive Systems'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.
Harmonic Drive Systems Days Inventory vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, Harmonic Drive Systems's Days Inventory distribution charts can be found below:
* The bar in red indicates where Harmonic Drive Systems'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.
Harmonic Drive Systems (HSYDF) has a Days Inventory of 99.73 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Harmonic Drive Systems and its competitors. This is 15% above median its historical median of 87.00. Over the past decade, Harmonic Drive Systems' Days Inventory has ranged from 63.48 to 114.12. According to the industry distribution chart, Harmonic Drive Systems ranks #1367 out of 2972 companies in the Industrial Products industry, placing it in the top 46%.
Is Harmonic Drive Systems' Days Inventory too high?
Harmonic Drive Systems' current Days Inventory of 99.73 is 15% above median its 10-year median of 87.00. Over the past 10 years, this metric has ranged from a low of 63.48 to a high of 114.12. The Industrial Products industry median Days Inventory is 119.39. Harmonic Drive Systems' value of 99.73 is 16.5% below this industry median. Based on the distribution chart, Harmonic Drive Systems ranks #1367 out of 2972 companies in the Industrial Products industry, which is above the industry midpoint. Overall, Harmonic Drive Systems has a GF Score™ of 70/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Harmonic Drive Systems' Days Inventory compare to GEV and ETN?
According to the Industrial Products industry distribution chart, Harmonic Drive Systems ranks #1367 out of 2972 companies for Days Inventory. This puts Harmonic Drive Systems in the upper half of its industry. The industry median Days Inventory is 119.39. Harmonic Drive Systems' value of 99.73 is 16.5% below this benchmark. Historically, Harmonic Drive Systems' own Days Inventory has ranged from 63.48 to 114.12 over the past decade. While the company's 10-year median is 87.00 vs. the industry median of 119.39, Harmonic Drive Systems 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 an Industrial Products company?
The median Days Inventory among Industrial Products companies is 119.39, based on 2,972 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. Harmonic Drive Systems's current Days Inventory of 99.73 is 16.5% 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 Harmonic Drive Systems and its competitors. For the Industrial Products industry, the median Days Inventory is 119.39 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Harmonic Drive Systems's current Days Inventory is 99.73, which is 15% above median its own 10-year median of 87.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Harmonic Drive Systems stock overvalued right now?
Based on GuruFocus' analysis, Harmonic Drive Systems (HSYDF) is currently considered Significantly Overvalued. The stock's GF Value™ is $23.39, compared to a current price of $44.88 — trading 91.9% above its estimated fair value. The current Days Inventory is 99.73, which is 15% above median its 10-year median of 87.00 and 16.5% below the Industrial Products industry median of 119.39. Harmonic Drive Systems' overall GF Score™ is 70/100 with 10 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 Harmonic Drive Systems (HSYDF), the current Days Inventory is 99.73 as of Mar. 2026. 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 Harmonic Drive Systems (HSYDF) Overvalued in 2026?
Based on GuruFocus' analysis, Harmonic Drive Systems stock appears to be overvalued.
The current stock price of $44.88 is trading 91.9% above its estimated GF Value™ of $23.39.
GuruFocus considers Harmonic Drive Systems to be Significantly Overvalued.
Key valuation signals for HSYDF:
Days Inventory: 99.73 (15% above median its 10-year median of 87.00)
GF Value™: $23.39 vs. price of $44.88 (91.9% above fair value)
Industry Position: 16.5% below the Industrial Products median (#1367 of 2972)
No single metric tells the full story. See the HSYDF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Harmonic Drive Systems manufactures and sells high-precision reduction gears (harmonic reducers) under the Harmonic Drive brand as well as other mechatronics products, including rotary actuators, linear actuators, and AC servo motors. The company also provides planetary gear speed reducers under the AccuDrive and Harmonic Planetary brands. Its products are used in industrial robots, semiconductor production equipment, and other high-precision equipment. HDS was founded in 1970 and is headquartered in Tokyo, Japan.
70GF Score
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