K+S AG (STU:SDF1) Cyclically Adjusted PB Ratio: (As of Sep. 20, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
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Director of Data and Quant Analytics at GuruFocus
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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:SDF1 K+S AG STU:SDF1
75 GF Score
Price €7.95
GF Value €6.60
Valuation Modestly Overvalued
! 6 Warning Signs
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What is K+S AG Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


K+S AG  (STU:SDF1) Cyclically Adjusted PB Ratio Explanation

Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value 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 PB Ratio should give similar results to regular PB Ratio.


K+S AG Cyclically Adjusted PB Ratio Related Terms


K+S AG Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for K+S AG's Cyclically Adjusted PB 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.

K+S AG Cyclically Adjusted PB Ratio Chart

K+S AG Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.70 0.71 0.50 0.34 0.40

K+S AG Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PB 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 0.50 0.37 0.39 0.52 0.41

STU:SDF1 vs CTVA, CF, MOS: Cyclically Adjusted PB Ratio Comparison

For the Agricultural Inputs subindustry, K+S AG'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.


K+S AG Cyclically Adjusted PB Ratio vs Agriculture Industry

For the Agriculture industry and Basic Materials sector, K+S AG's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where K+S AG's Cyclically Adjusted PB Ratio falls into.


STU:SDF1
75GF Score
K+S AG STU:SDF1
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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K+S AG Cyclically Adjusted PB Ratio Calculation

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

K+S AG's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, K+S AG's adjusted Book Value per Share data for the three months ended in Jun. 2026 was:

Adj_Book=Book Value per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=15.016/131.3638*131.3638
=15.016

Current CPI (Jun. 2026) = 131.3638.

K+S AG Quarterly Data

Book Value per Share CPI Adj_Book
201606 11.410 100.717 14.882
201609 11.070 101.017 14.396
201612 11.892 101.217 15.434
201703 12.042 101.417 15.598
201706 11.222 102.117 14.436
201709 11.138 102.717 14.244
201712 10.869 102.617 13.914
201803 10.453 102.917 13.342
201806 10.810 104.017 13.652
201809 10.948 104.718 13.734
201812 10.826 104.217 13.646
201903 11.647 104.217 14.681
201906 11.465 105.718 14.246
201909 11.911 106.018 14.759
201912 11.743 105.818 14.578
202003 11.141 105.718 13.844
202006 11.140 106.618 13.726
202009 6.025 105.818 7.480
202103 6.895 107.518 8.424
202106 8.772 108.486 10.622
202109 12.120 109.435 14.549
202112 13.739 110.384 16.350
202203 14.846 113.968 17.112
202206 16.142 115.760 18.318
202209 16.933 118.818 18.721
202212 17.555 119.345 19.323
202303 18.057 122.402 19.379
202306 17.791 123.140 18.979
202309 17.991 124.195 19.030
202312 18.155 123.773 19.268
202403 18.171 125.038 19.090
202406 17.827 125.882 18.603
202409 17.447 126.198 18.161
202412 17.354 127.041 17.944
202503 17.214 127.779 17.697
202506 12.011 128.412 12.287
202509 11.913 129.255 12.107
202512 13.645 129.361 13.856
202603 13.229 131.258 13.240
202606 15.016 131.364 15.016

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

Is K+S AG (STU:SDF1) Overvalued in 2026?

Based on GuruFocus' analysis, K+S AG stock appears to be overvalued. The current stock price of €7.95 is trading 20.5% above its estimated GF Value™ of €6.60. GuruFocus considers K+S AG to be Modestly Overvalued.

Key valuation signals for STU:SDF1:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: €6.60 vs. price of €7.95 (20.5% above fair value)
  • GF Score™: 75/100 with 6 warning signs

No single metric tells the full story. See the STU:SDF1 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


K+S AG Business Description

Address Bertha-von-Suttner-Strasse 7, Kassel, DEU, 34131
K+S AG produces two products: fertilizer and salt. The company engaged in business with potash and magnesium products from plants in Germany and Canadian sites in Bethune, as well as the European salt activities. It also includes the waste disposal and recycling business in Germany. extraction and processing of raw materials.
75GF Score

Get the complete analysis for STU:SDF1

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

€7.95
Price
€6.60
GF Value