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Harmonic Drive SystemsHSYDF -0.53%76 Shiller PE Ratio is 137.42 as of Aug. 21, 2026, which is 85% above its 10-year median of 74.34. GuruFocus rates HSYDF with a GF Score™ of 76/100 and a GF Value™ of $24.25 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 1,818 Industrial Products companies, Harmonic Drive Systems ranks worse than 92.96% on this metric.
The historical rank and industry rank for Harmonic Drive Systems's Shiller PE Ratio or its related term are showing as below:
HSYDF'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 42.6 Med: 74.34 Max: 209.88
Current: 132.33
During the past years, Harmonic Drive Systems's highest Shiller PE Ratio was 209.88. The lowest was 42.60. And the median was 74.34.
HSYDF's Shiller PE Ratio is ranked worse than 92.96% of 1818
companies
in the Industrial Products industry
Industry Median: 28.865
vs HSYDF: 132.33
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
Harmonic Drive Systems's adjusted earnings per share data for the three months ended in Mar. 2026 was $0.056. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $0.26 for the trailing ten years ended in Mar. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Harmonic Drive Systems (OTCPK:HSYDF) Shiller PE Ratio Explanation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Harmonic Drive Systems Shiller PE Ratio Related Terms
Harmonic Drive Systems Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Harmonic Drive Systems's Shiller PE Ratio 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.
HSYDF vs GEV, ETN, PH: Shiller PE Ratio Comparison
For the Specialty Industrial Machinery subindustry, Harmonic Drive Systems's Shiller PE Ratio, along with its competitors' market caps and Shiller PE Ratio 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 Shiller PE Ratio vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, Harmonic Drive Systems's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Harmonic Drive Systems's Shiller PE Ratio falls into.
Harmonic Drive Systems Shiller PE Ratio Calculation
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
* 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.
Add all the adjusted EPS together and divide 10 will get our E10.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
Harmonic Drive Systems (HSYDF) has a Shiller PE Ratio of 137.42 as of Aug. 21, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Harmonic Drive Systems and its competitors. This is 85% above median its historical median of 74.34. Over the past decade, Harmonic Drive Systems' Shiller PE Ratio has ranged from 42.60 to 209.88. According to the industry distribution chart, Harmonic Drive Systems ranks #1690 out of 1818 companies in the Industrial Products industry, placing it in the top 93%.
Is Harmonic Drive Systems' Shiller PE Ratio too high?
Harmonic Drive Systems' current Shiller PE Ratio of 137.42 is 85% above median its 10-year median of 74.34. Over the past 10 years, this metric has ranged from a low of 42.60 to a high of 209.88. The Industrial Products industry median Shiller PE Ratio is 28.87. Harmonic Drive Systems' value of 137.42 is 376.1% above this industry median. Based on the distribution chart, Harmonic Drive Systems ranks #1690 out of 1818 companies in the Industrial Products industry, which is in the bottom quartile relative to peers. Overall, Harmonic Drive Systems has a GF Score™ of 76/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Harmonic Drive Systems' Shiller PE Ratio compare to GEV and ETN?
According to the Industrial Products industry distribution chart, Harmonic Drive Systems ranks #1690 out of 1818 companies for Shiller PE Ratio. This places Harmonic Drive Systems in the lower half of its industry. The industry median Shiller PE Ratio is 28.87. Harmonic Drive Systems' value of 137.42 is 376.1% above this benchmark. Historically, Harmonic Drive Systems' own Shiller PE Ratio has ranged from 42.60 to 209.88 over the past decade. While the company's 10-year median is 74.34 vs. the industry median of 28.87, Harmonic Drive Systems 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 Shiller PE Ratio for an Industrial Products company?
The median Shiller PE Ratio among Industrial Products companies is 28.87, based on 1,818 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Harmonic Drive Systems's current Shiller PE Ratio of 137.42 is 376.1% 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 Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Harmonic Drive Systems and its competitors. For the Industrial Products industry, the median Shiller PE Ratio is 28.87 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Harmonic Drive Systems's current Shiller PE Ratio is 137.42, which is 85% above median its own 10-year median of 74.34. 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 $24.25, compared to a current price of $35.73 — trading 47.3% above its estimated fair value. The current Shiller PE Ratio is 137.42, which is 85% above median its 10-year median of 74.34 and 376.1% above the Industrial Products industry median of 28.87. Harmonic Drive Systems' overall GF Score™ is 76/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Harmonic Drive Systems (HSYDF), the current Shiller PE Ratio is 137.42 as of Aug. 21, 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 $35.73 is trading 47.3% above its estimated GF Value™ of $24.25.
GuruFocus considers Harmonic Drive Systems to be Significantly Overvalued.
Key valuation signals for HSYDF:
Shiller PE Ratio: 137.42 (85% above median its 10-year median of 74.34)
GF Value™: $24.25 vs. price of $35.73 (47.3% above fair value)
Industry Position: 376.1% above the Industrial Products median (#1690 of 1818)
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.
76GF Score
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