Plug Power (STU:PLUN) Cyclically Adjusted PS Ratio: (As of Sep. 22, 2026)

Author: Vera Yuan Vera Yuan
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Director of Data and Quant Analytics at GuruFocus
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Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
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.

STU:PLUN Plug Power Inc STU:PLUN
37 GF Score
Price €1.82
GF Value €1.24
Valuation Significantly Overvalued
! 5 Warning Signs
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What is Plug Power Cyclically Adjusted PS Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Plug Power  (STU:PLUN) Cyclically Adjusted PS Ratio Explanation

Compared with the regular PS Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PS Ratio smoothed out the fluctuations of revenue during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Cyclically Adjusted PS Ratio should give similar results to regular PS Ratio.


Plug Power Cyclically Adjusted PS Ratio Related Terms


Plug Power Cyclically Adjusted PS Ratio Historical Data

* Premium members only.

The historical data trend for Plug Power's Cyclically Adjusted PS 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.

Plug Power Cyclically Adjusted PS Ratio Chart

Plug Power Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PS Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 39.26 16.22 5.12 2.57 1.88

Plug Power Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PS Ratio 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 1.39 2.20 1.89 2.15 2.56

STU:PLUN vs HAYW, ATKR, PLPC: Cyclically Adjusted PS Ratio Comparison

For the Electrical Equipment & Parts subindustry, Plug Power's Cyclically Adjusted PS Ratio, along with its competitors' market caps and Cyclically Adjusted PS 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.


Plug Power Cyclically Adjusted PS Ratio vs Industrial Products Industry

For the Industrial Products industry and Industrials sector, Plug Power's Cyclically Adjusted PS Ratio distribution charts can be found below:

* The bar in red indicates where Plug Power's Cyclically Adjusted PS Ratio falls into.


STU:PLUN
37GF Score
Plug Power Inc STU:PLUN
Cyclically Adjusted PS Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Plug Power Cyclically Adjusted PS Ratio Calculation

Like the Shiller PE Ratio, the Cyclically Adjusted PS Ratio takes the Revenue per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/S calculation. Because it considers this 10-year average, it's often referred to as the CAPS Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PS Ratio.

Plug Power's Cyclically Adjusted Revenue per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, Plug Power's adjusted Revenue per Share data for the three months ended in Jun. 2026 was:

Adj_RevenuePerShare=Revenue per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=0.11/333.9520*333.9520
=0.110

Current CPI (Jun. 2026) = 333.9520.

Plug Power Quarterly Data

Revenue per Share CPI Adj_RevenuePerShare
201609 0.087 241.428 0.120
201612 0.158 241.432 0.219
201703 0.075 243.801 0.103
201706 0.086 244.955 0.117
201709 0.131 246.819 0.177
201712 0.116 246.524 0.157
201803 0.097 249.554 0.130
201806 0.138 251.989 0.183
201809 0.209 252.439 0.276
201812 0.240 251.233 0.319
201903 0.086 254.202 0.113
201906 0.222 256.143 0.289
201909 0.226 256.759 0.294
201912 0.318 256.974 0.413
202003 0.121 258.115 0.157
202006 0.195 257.797 0.253
202009 0.247 260.280 0.317
202012 0.164 260.474 0.210
202103 0.116 264.877 0.146
202106 0.182 271.696 0.224
202109 0.213 274.310 0.259
202112 0.246 278.802 0.295
202203 0.217 287.504 0.252
202206 0.246 296.311 0.277
202209 0.324 296.808 0.365
202212 0.371 296.797 0.417
202303 0.333 301.836 0.368
202306 0.400 305.109 0.438
202309 0.305 307.789 0.331
202312 0.341 306.746 0.371
202403 0.173 312.332 0.185
202406 0.181 314.175 0.192
202409 0.184 315.301 0.195
202412 0.196 315.605 0.207
202503 0.134 319.799 0.140
202506 0.136 322.561 0.141
202509 0.131 324.800 0.135
202512 0.139 324.054 0.143
202603 0.101 330.213 0.102
202606 0.110 333.952 0.110

Add all the adjusted revenue per share together and divide 10 will get our Cyclically Adjusted Revenue 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.

Is Plug Power (STU:PLUN) Overvalued in 2026?

Based on GuruFocus' analysis, Plug Power stock appears to be overvalued. The current stock price of €1.82 is trading 46.8% above its estimated GF Value™ of €1.24. GuruFocus considers Plug Power to be Significantly Overvalued.

Key valuation signals for STU:PLUN:

  • Cyclically Adjusted PS Ratio:
  • GF Value™: €1.24 vs. price of €1.82 (46.8% above fair value)
  • GF Score™: 37/100 with 5 warning signs

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


Plug Power Business Description

Address 125 Vista Boulevard, Slingerlands, NY, USA, 12159
Plug Power Inc is building an end-to-end green hydrogen ecosystem, from production, storage, and delivery to energy generation. The company plans to build and operate green hydrogen highways across North America and Europe. Plug will deliver its green hydrogen solutions directly to its customers and through joint venture partners into multiple end markets, including material handling, e-mobility, power generation, and industrial applications.
37GF Score

Get the complete analysis for STU:PLUN

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

€1.82
Price
€1.24
GF Value