Southern Co (STU:SOT) Cyclically Adjusted PS Ratio: (As of Sep. 21, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
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:SOT Southern Co STU:SOT
76 GF Score
Price €74.50
GF Value €82.89
Valuation Modestly Undervalued
! 5 Warning Signs
View Full Analysis

What is Southern Co Cyclically Adjusted PS Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Southern Co  (STU:SOT) 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.


Southern Co Cyclically Adjusted PS Ratio Related Terms


Southern Co Cyclically Adjusted PS Ratio Historical Data

* Premium members only.

The historical data trend for Southern Co'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.

Southern Co Cyclically Adjusted PS Ratio Chart

Southern Co 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 3.07 3.13 2.82 3.44 3.11

Southern Co 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 3.24 3.33 3.10 3.40 3.40

STU:SOT vs DUK, AEP, D: Cyclically Adjusted PS Ratio Comparison

For the Utilities - Regulated Electric subindustry, Southern Co'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.


Southern Co Cyclically Adjusted PS Ratio vs Utilities - Regulated Industry

For the Utilities - Regulated industry and Utilities sector, Southern Co's Cyclically Adjusted PS Ratio distribution charts can be found below:

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


STU:SOT
76GF Score
Southern Co STU:SOT
Cyclically Adjusted PS Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Southern Co 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.

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

For example, Southern Co'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)
=5.259/333.9520*333.9520
=5.259

Current CPI (Jun. 2026) = 333.9520.

Southern Co Quarterly Data

Revenue per Share CPI Adj_RevenuePerShare
201609 5.757 241.428 7.963
201612 4.329 241.432 5.988
201703 5.368 243.801 7.353
201706 4.930 244.955 6.721
201709 5.245 246.819 7.097
201712 4.843 246.524 6.561
201803 5.115 249.554 6.845
201806 4.681 251.989 6.204
201809 5.176 252.439 6.847
201812 4.408 251.233 5.859
201903 4.533 254.202 5.955
201906 4.270 256.143 5.567
201909 5.103 256.759 6.637
201912 4.095 256.974 5.322
202003 4.209 258.115 5.446
202006 3.935 257.797 5.097
202009 4.546 260.280 5.833
202012 3.844 260.474 4.928
202103 4.616 264.877 5.820
202106 4.124 271.696 5.069
202109 4.956 274.310 6.034
202112 4.587 278.802 5.494
202203 5.542 287.504 6.437
202206 6.321 296.311 7.124
202209 7.642 296.808 8.598
202212 6.343 296.797 7.137
202303 5.500 301.836 6.085
202306 4.810 305.109 5.265
202309 5.838 307.789 6.334
202312 5.149 306.746 5.606
202403 5.567 312.332 5.952
202406 5.448 314.175 5.791
202409 6.003 315.301 6.358
202412 5.343 315.605 5.654
202503 6.685 319.799 6.981
202506 5.552 322.561 5.748
202509 6.031 324.800 6.201
202512 5.362 324.054 5.526
202603 6.363 330.213 6.435
202606 5.259 333.952 5.259

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 Southern Co (STU:SOT) Overvalued in 2026?

Based on GuruFocus' analysis, Southern Co stock appears to be undervalued. The current stock price of €74.50 is trading 10.1% below its estimated GF Value™ of €82.89. GuruFocus considers Southern Co to be Modestly Undervalued.

Key valuation signals for STU:SOT:

  • Cyclically Adjusted PS Ratio:
  • GF Value™: €82.89 vs. price of €74.50 (10.1% below fair value)
  • GF Score™: 76/100 with 5 warning signs

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


Southern Co Business Description

Address 30 Ivan Allen Jr. Boulevard, Northwest, Atlanta, GA, USA, 30308
Southern is one of the largest utilities in the US. The company serves 9 million customers with vertically integrated electric utilities in three states and natural gas distribution utilities in four states. It owns 46 gigawatts of rate-regulated generating capacity, primarily for serving customers in Georgia, Alabama, and Mississippi. Subsidiary Southern Power owns 13 gigawatts of natural gas generation and renewable energy across the US and sells the electricity primarily under long-term contracts.
76GF Score

Get the complete analysis for STU:SOT

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

€74.50
Price
€82.89
GF Value