Dialight (LSE:DIA) 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.

LSE:DIA Dialight PLC LSE:DIA
42 GF Score
Price £5.64
GF Value £1.45
Valuation Significantly Overvalued
! 7 Warning Signs
View Full Analysis

What is Dialight Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Dialight  (LSE:DIA) 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.


Dialight Cyclically Adjusted PB Ratio Related Terms


Dialight Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Dialight'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.

Dialight Cyclically Adjusted PB Ratio Chart

Dialight Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Mar24 Mar25 Mar26
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 1.40 1.22 - - -

Dialight Semi-Annual Data
Jun16 Dec16 Jun17 Dec17 Jun18 Dec18 Jun19 Dec19 Jun20 Dec20 Jun21 Dec21 Jun22 Dec22 Jun23 Dec23 Sep24 Mar25 Sep25 Mar26
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 0.57 0.79 0.48 0.97 1.18

LSE:DIA vs VRT, BE: Cyclically Adjusted PB Ratio Comparison

For the Electrical Equipment & Parts subindustry, Dialight'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.


Dialight Cyclically Adjusted PB Ratio vs Industrial Products Industry

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

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


LSE:DIA
42GF Score
Dialight PLC LSE:DIA
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Dialight 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.

Dialight's Cyclically Adjusted Book per Share for the fiscal year that ended in Mar26 is calculated as:

For example, Dialight's adjusted Book Value per Share data for the fiscal year that ended in Mar26 was:

Adj_Book=Book Value per Share/CPI of Mar26 (Change)*Current CPI (Mar26)
=0.893/140.8000*140.8000
=0.893

Current CPI (Mar26) = 140.8000.

Dialight Annual Data

Book Value per Share CPI Adj_Book
201612 2.372 102.200 3.268
201712 2.340 105.000 3.138
201812 2.616 107.100 3.439
201912 2.084 108.500 2.704
202012 1.760 109.400 2.265
202112 1.858 114.700 2.281
202212 2.100 125.300 2.360
202403 1.276 131.600 1.365
202503 0.921 136.100 0.953
202603 0.893 140.800 0.893

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 Dialight (LSE:DIA) Overvalued in 2026?

Based on GuruFocus' analysis, Dialight stock appears to be overvalued. The current stock price of £5.64 is trading 289% above its estimated GF Value™ of £1.45. GuruFocus considers Dialight to be Significantly Overvalued.

Key valuation signals for LSE:DIA:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: £1.45 vs. price of £5.64 (289% above fair value)
  • GF Score™: 42/100 with 7 warning signs

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


Dialight Business Description

Other Exchanges DIALF:USADIAl:UK3HQ:Germany
Address 60 Petty France, London, GBR, SW1H 9EU
Dialight PLC manufactures and sells light-emitting diode (LED) lighting fixtures for use in hazardous and industrial locations. It provides lighting products to customers in industrial sectors including steel foundries, pulp and paper mills, automotive manufacturers, utility, and wastewater plants, and food and beverage processing plants. In addition, it provides specialist lighting products for hazardous industrial sites, including the oil and gas and mining sectors. Its segments are Lighting, Signals, and Components. The majority of the revenue is derived from the sale of LED lighting solutions and anti-collision obstruction lighting. Geographically it derives the majority of its revenue from North America.
42GF Score

Get the complete analysis for LSE:DIA

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

£5.64
Price
£1.45
GF Value