Light (BSP:LIGT3) Cyclically Adjusted PB 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.

BSP:LIGT3 Light SA BSP:LIGT3
63 GF Score
Price R$3.62
GF Value R$4.66
Valuation Modestly Undervalued
! 6 Warning Signs
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What is Light Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Light  (BSP:LIGT3) 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.


Light Cyclically Adjusted PB Ratio Related Terms


Light Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Light'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.

Light Cyclically Adjusted PB Ratio Chart

Light 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 0.49 0.20 0.36 0.19 0.23

Light 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 0.29 0.27 0.22 0.22 0.15

Light Cyclically Adjusted PB Ratio Competitor Comparison

For the Utilities - Renewable subindustry, Light'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.


Light Cyclically Adjusted PB Ratio vs Utilities - Independent Power Producers Industry

For the Utilities - Independent Power Producers industry and Utilities sector, Light's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


BSP:LIGT3
63GF Score
Light SA BSP:LIGT3
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Light 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.

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

For example, Light'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)
=24.989/177.5443*177.5443
=24.989

Current CPI (Jun. 2026) = 177.5443.

Light Quarterly Data

Book Value per Share CPI Adj_Book
201609 17.400 109.986 28.088
201612 16.445 110.802 26.351
201703 16.599 111.869 26.344
201706 16.239 112.115 25.716
201709 16.530 112.777 26.023
201712 16.831 114.068 26.197
201803 16.455 114.868 25.433
201806 16.331 117.038 24.774
201809 16.361 117.881 24.642
201812 16.621 118.340 24.936
201903 17.426 120.124 25.756
201906 17.479 120.977 25.652
201909 22.737 121.292 33.282
201912 20.500 123.436 29.486
202003 22.093 124.092 31.610
202006 21.953 123.557 31.545
202009 22.406 125.095 31.800
202012 23.282 129.012 32.040
202103 22.503 131.660 30.345
202106 22.503 133.871 29.844
202109 23.486 137.913 30.235
202112 23.441 141.992 29.310
202203 23.161 146.537 28.062
202206 22.944 149.784 27.196
202209 22.968 147.800 27.590
202212 7.636 150.207 9.026
202303 7.924 153.352 9.174
202306 8.214 154.519 9.438
202309 8.183 155.464 9.345
202312 8.309 157.148 9.387
202403 7.352 159.372 8.190
202406 7.216 161.052 7.955
202409 7.644 162.342 8.360
202412 14.007 164.740 15.096
202503 15.138 168.102 15.988
202506 15.002 169.670 15.698
202509 15.091 170.739 15.692
202512 14.625 171.765 15.117
202603 22.341 175.066 22.657
202606 24.989 177.544 24.989

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 Light (BSP:LIGT3) Overvalued in 2026?

Based on GuruFocus' analysis, Light stock appears to be undervalued. The current stock price of R$3.62 is trading 22.3% below its estimated GF Value™ of R$4.66. GuruFocus considers Light to be Modestly Undervalued.

Key valuation signals for BSP:LIGT3:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: R$4.66 vs. price of R$3.62 (22.3% below fair value)
  • GF Score™: 63/100 with 6 warning signs

No single metric tells the full story. See the BSP:LIGT3 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Light Business Description

Other Exchanges LGSXY:USA
Address Rua Marechal Floriano, No. 168, block 1-2nd floor, Rio de Janeiro, RJ, BRA, 20080-002
Light SA is a Brazilian private-public utility of which the state-owned power company, CEMIG, wields a controlling stake. The company generates, distributes, and trades energy. To do this, the company owns and operates a portfolio of hydroelectric power plants that serve the Brazilian state of Rio de Janeiro. Light derives maximum of its revenue from the supplying of energy, with network usage and the construction of assets also bringing in substantial amounts of revenue. The vast majority of the company's customers are residential consumers. The company operates in three segments namely: Distribution, Generation and Trading, out of which maximum revenue is generated from Distribution segment.
63GF Score

Get the complete analysis for BSP:LIGT3

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

R$3.62
Price
R$4.66
GF Value