Harmonic Drive Systems (STU:K3R) Cyclically Adjusted Book per Share: €5.66 (As of Mar. 2026)


STU:K3R Harmonic Drive Systems Inc STU:K3R
72 GF Score
Price €43.30
GF Value €21.58
Valuation Significantly Overvalued
! 6 Warning Signs
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What is Harmonic Drive Systems Cyclically Adjusted Book per Share?

Harmonic Drive Systems STU:K3R +5.38% 72 Cyclically Adjusted Book per Share is €5.66 as of Mar. 2026. GuruFocus rates STU:K3R with a GF Score™ of 72/100 and a GF Value™ of €21.58 (Significantly Overvalued). The stock has 6 warning signs investors should review.

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. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

Harmonic Drive Systems's adjusted book value per share for the three months ended in Mar. 2026 was €4.629. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is €5.66 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Harmonic Drive Systems's average Cyclically Adjusted Book Growth Rate was 5.40% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 8.70% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 11.10% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the Cyclically Adjusted Book Growth Rate using Cyclically Adjusted Book per Share data.

During the past 13 years, the highest 3-Year average Cyclically Adjusted Book Growth Rate of Harmonic Drive Systems was 19.20% per year. The lowest was 8.70% per year. And the median was 14.10% per year.

As of today (2026-07-12), Harmonic Drive Systems's current stock price is €43.30. Harmonic Drive Systems's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was €5.66. Harmonic Drive Systems's Cyclically Adjusted PB Ratio of today is 7.65.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Harmonic Drive Systems was 23.83. The lowest was 2.01. And the median was 7.66.


Harmonic Drive Systems  (STU:K3R) Cyclically Adjusted Book per Share Explanation

If a company grows much fast than inflation, Cyclically Adjusted Book per Share may underestimate the company's equity. Cyclically Adjusted PB Ratio can seem to be too high even the actual PB Ratio is low.

For the Cyclically Adjusted PB Ratio, the book value of the past 10 years are inflation-adjusted and averaged. The result is used for P/B calculation. Since it looks at the average over the last 10 years, the Cyclically Adjusted PB Ratio is also called CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.

Harmonic Drive Systems's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=43.30/5.66
=7.65

* 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.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Harmonic Drive Systems was 23.83. The lowest was 2.01. And the median was 7.66.


Be Aware

Cyclically Adjusted PB Ratio works better for cyclical companies. It gives you a better idea on the company's real book value.


Harmonic Drive Systems Cyclically Adjusted Book per Share Related Terms


Harmonic Drive Systems Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Harmonic Drive Systems's Cyclically Adjusted Book per Share 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.

Harmonic Drive Systems Cyclically Adjusted Book per Share Chart

Harmonic Drive Systems Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 4.98 5.34 5.30 5.83 5.66

Harmonic Drive Systems Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Cyclically Adjusted Book per Share 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 5.83 5.60 5.59 5.31 5.66

STU:K3R vs GEV, ETN, PH: Cyclically Adjusted Book per Share Comparison

For the Specialty Industrial Machinery subindustry, Harmonic Drive Systems's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB 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 Cyclically Adjusted PB Ratio vs Industrial Products Industry

For the Industrial Products industry and Industrials sector, Harmonic Drive Systems's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Harmonic Drive Systems's Cyclically Adjusted PB Ratio falls into.


STU:K3R
72GF Score
Harmonic Drive Systems Inc STU:K3R
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Harmonic Drive Systems Cyclically Adjusted Book per Share Calculation

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. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

What is Cyclically Adjusted Book per Share? How do we calculate Cyclically Adjusted Book per Share?

Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the Cyclically Adjusted Book per Share of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the book value per share from 2001 through 2010.

We adjusted the 2001 book value per share data with the total inflation from 2001 through 2010 to the equivalent book value in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart's book value is $1 a share in 2001, then the 2001's equivalent book value in 2010 is $1.4 a share. If Wal-Mart's book value is $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 book value in 2010 is $1.35. So on and so forth, you get the equivalent book value per share of past 10 years. Then you add them together and divided the sum by the count to get Cyclically Adjusted Book per Share.

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.

For example, Harmonic Drive Systems's adjusted Book Value per Share data for the three months ended in Mar. 2026 was:

Adj_Book= Book Value per Share /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=4.629/112.7000*112.7000
=4.629

Current CPI (Mar. 2026) = 112.7000.

Harmonic Drive Systems Quarterly Data

Book Value per Share CPI Adj_Book
201606 3.430 98.100 3.940
201609 3.726 98.000 4.285
201612 3.492 98.400 3.999
201703 4.977 98.100 5.718
201706 5.152 98.500 5.895
201709 5.326 98.800 6.075
201712 5.458 99.400 6.188
201803 7.967 99.200 9.051
201806 8.027 99.200 9.119
201809 8.118 99.900 9.158
201812 8.250 99.700 9.326
201903 8.670 99.700 9.800
201906 8.709 99.800 9.835
201909 8.933 100.100 10.057
201912 8.610 100.500 9.655
202003 8.492 100.300 9.542
202006 8.507 99.900 9.597
202009 8.434 99.900 9.515
202012 8.422 99.300 9.559
202103 8.260 99.900 9.318
202106 8.002 99.500 9.064
202109 7.680 100.100 8.647
202112 7.693 100.100 8.661
202203 7.864 101.100 8.766
202206 7.316 101.800 8.099
202209 7.349 103.100 8.033
202212 7.519 104.100 8.140
202303 7.641 104.400 8.248
202306 7.236 105.200 7.752
202309 7.109 106.200 7.544
202312 7.092 106.800 7.484
202403 5.134 107.200 5.397
202406 0.000 108.200 0.000
202409 5.369 108.900 5.556
202412 5.097 110.700 5.189
202503 5.162 111.100 5.236
202506 4.826 111.700 4.869
202509 4.676 112.000 4.705
202512 4.488 113.000 4.476
202603 4.629 112.700 4.629

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

What does a Cyclically Adjusted Book per Share of €5.66 mean?
Harmonic Drive Systems (STU:K3R) has a Cyclically Adjusted Book per Share of €5.66 as of Mar. 2026. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Harmonic Drive Systems and its competitors.
Is Harmonic Drive Systems' Cyclically Adjusted Book per Share too high?
Harmonic Drive Systems' current Cyclically Adjusted Book per Share is €5.66. Overall, Harmonic Drive Systems has a GF Score™ of 72/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Harmonic Drive Systems' Cyclically Adjusted Book per Share compare to GEV and ETN?
Harmonic Drive Systems' Cyclically Adjusted Book per Share of €5.66 can be compared against companies in the Industrial Products industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted Book per Share for an Industrial Products company?
A good Cyclically Adjusted Book per Share depends on the Industrial Products industry context. However, Cyclically Adjusted Book per Share should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Cyclically Adjusted Book per Share mean?
A high Cyclically Adjusted Book per Share can signal that a stock is expensive relative to its fundamentals. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Harmonic Drive Systems and its competitors. Harmonic Drive Systems's current Cyclically Adjusted Book per Share is €5.66. 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 (STU:K3R) is currently considered Significantly Overvalued. The stock's GF Value™ is €21.58, compared to a current price of €43.30 — trading 100.6% above its estimated fair value. The current Cyclically Adjusted Book per Share is €5.66. Harmonic Drive Systems' overall GF Score™ is 72/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For Harmonic Drive Systems (STU:K3R), the current Cyclically Adjusted Book per Share is €5.66 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 (STU:K3R) Overvalued in 2026?

Based on GuruFocus' analysis, Harmonic Drive Systems stock appears to be overvalued. The current stock price of €43.30 is trading 100.6% above its estimated GF Value™ of €21.58. GuruFocus considers Harmonic Drive Systems to be Significantly Overvalued.

Key valuation signals for STU:K3R:

  • Cyclically Adjusted Book per Share: €5.66
  • GF Value™: €21.58 vs. price of €43.30 (100.6% above fair value)
  • GF Score™: 72/100 with 6 warning signs

No single metric tells the full story. See the STU:K3R stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Harmonic Drive Systems Business Description

Other Exchanges HSYDF:USA6324:Japan
Address 6-25-3 Minami-Oi, Shinagawa-ku, Tokyo, JPN, 140-0013
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.
72GF Score

Get the complete analysis for STU:K3R

Cyclically Adjusted Book per Share is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€43.30
Price
€21.58
GF Value