Mahanagar Telephone Nigam (NSE:MTNL) Cyclically Adjusted PB Ratio: (As of Aug. 21, 2026)

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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.
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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.

NSE:MTNL Mahanagar Telephone Nigam Ltd NSE:MTNL
53 GF Score
Price ₹26.79
GF Value ₹43.43
Valuation Possible Value Trap
! 4 Warning Signs
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What is Mahanagar Telephone Nigam Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Mahanagar Telephone Nigam  (NSE:MTNL) 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.


Mahanagar Telephone Nigam Cyclically Adjusted PB Ratio Related Terms


Mahanagar Telephone Nigam Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Mahanagar Telephone Nigam'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.

Mahanagar Telephone Nigam Cyclically Adjusted PB Ratio Chart

Mahanagar Telephone Nigam Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Cyclically Adjusted PB Ratio
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Mahanagar Telephone Nigam 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 0.00 0.00 0.00 0.00 0.00

NSE:MTNL vs VZ, TMUS, T: Cyclically Adjusted PB Ratio Comparison

For the Telecom Services subindustry, Mahanagar Telephone Nigam'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.


Mahanagar Telephone Nigam Cyclically Adjusted PB Ratio vs Telecommunication Services Industry

For the Telecommunication Services industry and Communication Services sector, Mahanagar Telephone Nigam's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


NSE:MTNL
53GF Score
Mahanagar Telephone Nigam Ltd NSE:MTNL
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Mahanagar Telephone Nigam 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.

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

For example, Mahanagar Telephone Nigam'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)
=0/167.3573*167.3573
=0.000

Current CPI (Jun. 2026) = 167.3573.

Mahanagar Telephone Nigam Quarterly Data

Book Value per Share CPI Adj_Book
201209 6.155 82.244 12.525
201303 -44.256 85.687 -86.437
201403 80.043 91.425 146.522
201503 24.430 97.163 42.079
201603 -6.428 102.518 -10.493
201703 -53.440 105.196 -85.018
201803 -100.508 109.786 -153.213
201806 0.000 111.317 0.000
201809 0.000 115.142 0.000
201812 0.000 115.142 0.000
201903 -154.410 118.202 -218.623
201906 0.000 120.880 0.000
201909 -186.880 123.175 -253.913
201912 0.000 126.235 0.000
202003 -215.589 124.705 -289.326
202006 0.000 127.000 0.000
202009 -235.033 130.118 -302.299
202012 0.000 130.889 0.000
202103 -254.675 131.771 -323.454
202106 0.000 134.084 0.000
202109 -276.143 135.847 -340.196
202112 0.000 138.161 0.000
202203 -296.322 138.822 -357.232
202206 0.000 142.347 0.000
202209 -318.331 144.661 -368.275
202212 0.000 145.763 0.000
202303 -331.031 146.865 -377.221
202306 0.000 150.280 0.000
202309 -353.149 151.492 -390.133
202312 0.000 152.924 0.000
202403 -375.303 153.035 -410.428
202406 0.000 155.789 0.000
202409 -401.390 157.882 -425.479
202412 0.000 158.323 0.000
202503 -427.285 157.552 -453.878
202506 0.000 159.755 0.000
202509 -457.125 162.289 -471.400
202512 0.000 163.281 0.000
202603 -475.551 164.272 -484.481
202606 0.000 167.357 0.000

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 Mahanagar Telephone Nigam (NSE:MTNL) Overvalued in 2026?

Based on GuruFocus' analysis, Mahanagar Telephone Nigam stock appears to be undervalued. The current stock price of ₹26.79 is trading 38.3% below its estimated GF Value™ of ₹43.43. GuruFocus considers Mahanagar Telephone Nigam to be Possible Value Trap.

Key valuation signals for NSE:MTNL:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: ₹43.43 vs. price of ₹26.79 (38.3% below fair value)
  • GF Score™: 53/100 with 4 warning signs

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


Mahanagar Telephone Nigam Business Description

Other Exchanges 500108:India
Address Lodhi Road, 5th Floor, 9, CGO Complex, Mahanagar Doorsanchar Sadan, New Delhi, IND, 110 003
Mahanagar Telephone Nigam Ltd is an India-based company that provides telecommunications services. The company's operating segment includes the Basic and Cellular segments. It generates maximum revenue from the Basic segment. The company offers various telecom services, including fixed telephone service, GSM (including 3G services), Internet, Broadband, ISDN, and Leased Line services.
53GF Score

Get the complete analysis for NSE:MTNL

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

₹26.79
Price
₹43.43
GF Value