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The Relative Strength Index (RSI) is a momentum oscillator that measures the speed and change of price movements. The RSI is most typically used on a 14-day period, measured on a scale from 0 to 100. Traditionally, an asset is considered overbought or overvalued when the RSI is above 70 and oversold or undervalued when it is below 30. A shorter period RSI is more reactive to recent price changes, so it can show early signs of reversals. 9-Day RSI is sometimes used together with 14-Day RSI in a two period divergence strategy.
The industry rank for Harmonic Drive Systems's 9-Day RSI or its related term are showing as below:
STU:K3R's 9-Day RSI is ranked better than 56.46% of 3126
companies
in the Industrial Products industry
Industry Median: 43.87
vs STU:K3R: 37.47
Harmonic Drive Systems (STU:K3R) 9-Day RSI Explanation
The Relative Strength Index (RSI), developed by J. Welles Wilder in his book “New Concepts in Technical Trading Systems.”, is a momentum oscillator that measures the speed and change of price movements. The RSI is most typically used on a 14-day period, measured on a scale from 0 to 100.
Traditionally, an asset is considered overbought or overvalued when the RSI is above 70 and oversold or undervalued when it is below 30. A RSI surpasses the 30 level indicates a bullish sign, when it slides below 70 level, it’s a bearish sign. This level can be adjusted depending on the security’s pattern and the market’s underlying trend. In an uptrend or bullish market, the RSI might range within a higher interval, investors could set the support level higher. If a downtrend or bearish market occurs, investors may need to lower the resistance level.
RSI can also be used in trading techniques to indicate the trading signal, such as Divergences and Swing Rejections. A shorter period RSI is more reactive to recent price changes, so it can show early signs of reversals. 9-Day RSI is sometimes used together with 14-Day RSI in a two period divergence strategy.
Harmonic Drive Systems 9-Day RSI Related Terms
STU:K3R vs GEV, ETN, PH: 9-Day RSI Comparison
For the Specialty Industrial Machinery subindustry, Harmonic Drive Systems's 9-Day RSI, along with its competitors' market caps and 9-Day RSI 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 9-Day RSI vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, Harmonic Drive Systems's 9-Day RSI distribution charts can be found below:
* The bar in red indicates where Harmonic Drive Systems's 9-Day RSI falls into.
Harmonic Drive Systems (STU:K3R) 9-Day RSI Calculation
The formula for calculating RSI is:
RSI
=
100
–
[ 100
/
( 1 + Average Gain
/
Average Loss )]
* Note that the formula uses a positive value for the average loss.
* 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 (STU:K3R) has a 9-Day RSI of 37.47 as of Jul. 25, 2026. According to the industry distribution chart, Harmonic Drive Systems ranks #1361 out of 3126 companies in the Industrial Products industry, placing it in the top 43.5%.
Is Harmonic Drive Systems' 9-Day RSI too high?
Harmonic Drive Systems' current 9-Day RSI is 37.47. The Industrial Products industry median 9-Day RSI is 43.87. Harmonic Drive Systems' value of 37.47 is 14.6% below this industry median. Based on the distribution chart, Harmonic Drive Systems ranks #1361 out of 3126 companies in the Industrial Products industry, which is above the industry midpoint. 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' 9-Day RSI compare to GEV and ETN?
According to the Industrial Products industry distribution chart, Harmonic Drive Systems ranks #1361 out of 3126 companies for 9-Day RSI. This puts Harmonic Drive Systems in the upper half of its industry. The industry median 9-Day RSI is 43.87. Harmonic Drive Systems' value of 37.47 is 14.6% below this benchmark. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 9-Day RSI for an Industrial Products company?
The median 9-Day RSI among Industrial Products companies is 43.87, based on 3,126 companies in the industry. Companies in the top quartile (top 25%) have a 9-Day RSI significantly above this median, while those in the bottom quartile fall well below. However, 9-Day RSI should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Harmonic Drive Systems's current 9-Day RSI of 37.47 is 14.6% 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 9-Day RSI mean?
A high 9-Day RSI can signal that a stock is expensive relative to its fundamentals. For the Industrial Products industry, the median 9-Day RSI is 43.87 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Harmonic Drive Systems's current 9-Day RSI is 37.47. 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 €20.68, compared to a current price of €34.74 — trading 68% above its estimated fair value. The current 9-Day RSI is 37.47 and 14.6% below the Industrial Products industry median of 43.87. 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 9-Day RSI calculated?
9-Day RSI is calculated from a company's financial statements. For Harmonic Drive Systems (STU:K3R), the current 9-Day RSI is 37.47 as of Jul. 25, 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 €34.74 is trading 68% above its estimated GF Value™ of €20.68.
GuruFocus considers Harmonic Drive Systems to be Significantly Overvalued.
Key valuation signals for STU:K3R:
9-Day RSI: 37.47
GF Value™: €20.68 vs. price of €34.74 (68% above fair value)
Industry Position: 14.6% below the Industrial Products median (#1361 of 3126)
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 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
Get the complete analysis for STU:K3R
9-Day RSI is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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