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Spark New ZealandASX:SPK +1.29%70 Graham Number is A$0.84 as of Dec. 2025, which is 100% below its 10-year median of 3.45. GuruFocus rates ASX:SPK with a GF Score™ of 70/100 and a GF Value™ of A$2.68 (Significantly Undervalued). The stock has 8 warning signs investors should review. Among 191 Telecommunication Services companies, Spark New Zealand ranks worse than 62.83% on this metric.
Graham Number is a figure that measures a stock's fundamental value by taking into account the company's earnings per share and book value per share. The Graham number is the upper bound of the price range that a defensive investor should pay for the stock. According to the theory, any stock price below the Graham number is considered undervalued, and thus worth investing in.
As of today (2026-07-13), the stock price of Spark New Zealand is A$1.57. Spark New Zealand's graham number for the quarter that ended in Dec. 2025 was A$0.84. Therefore, Spark New Zealand's Price to Graham Number ratio for today is 1.87.
The historical rank and industry rank for Spark New Zealand's Graham Number or its related term are showing as below:
ASX:SPK'
s Price-to-Graham-Number Range Over the Past 10 Years
Min: 1.76 Med: 3.45 Max: 4.43
Current: 2.01
During the past 13 years, the highest Price to Graham Number ratio of Spark New Zealand was 4.43. The lowest was 1.76. And the median was 3.45.
ASX:SPK's Price-to-Graham-Number is ranked worse than 62.83% of 191
companies
in the Telecommunication Services industry
Industry Median: 1.6
vs ASX:SPK: 2.01
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Spark New Zealand (ASX:SPK) Graham Number Explanation
Ben Graham actually did not publish a formula like this. But he wrote in The Intelligent Investor (1948 version) regarding to the criteria for purchases:
Current price should not be more than 15 times average earnings of the past three years.
Current price should not be more than 1.5 times the book value last reported. However, a multiplier of earnings below 15 could justify a correspondingly higher multiplier of assets. As a rule of thumb we suggest that the product of the multiplier times the ratio of price to book value should not exceed 22.5. (This figure corresponds to 15 times earnings and 1.5 times book value. It would admit an issue selling at only 9 times earnings and 2.5 times asset value, etc.)
Unlike valuation methods such as DCF or Discounted Earnings, the Graham number does not take growth into the valuation. Unlike the valuation methods based on book value alone, it takes into account the earnings power. Therefore, the Graham Number is a combination of asset valuation and earnings power valuation.
In general, the Graham number is a very conservative way of valuing a stock. It cannot be applied to companies with negative book values.
Spark New Zealand's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Dec. 2025 )
=
1.57
/
0.84
=
1.87
* 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.
Be Aware
Please keep these in mind:
1. Graham Number does not take growth into account. Therefore it underestimates the values of the companies that have good earnings growth. We feel that if the earnings per share grows more than 10% a year, Graham Number underestimates the value.
2. Graham Number punishes the companies that have temporarily low earnings. Therefore, an average of earnings makes more sense in the calculation of Graham Number.
3. Graham Numbers underestimates companies that are light with book.
Spark New Zealand Graham Number Related Terms
Spark New Zealand Graham Number Historical Data
* Premium members only.
The historical data trend for Spark New Zealand's Graham Number 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.
For the Telecom Services subindustry, Spark New Zealand's Price-to-Graham-Number, along with its competitors' market caps and Price-to-Graham-Number 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.
Spark New Zealand Price-to-Graham-Number vs Telecommunication Services Industry
For the Telecommunication Services industry and Communication Services sector, Spark New Zealand's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Spark New Zealand's Price-to-Graham-Number falls into.
* 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.
Spark New Zealand (ASX:SPK) has a Graham Number of A$0.84 as of Dec. 2025. The Graham Number values a company based on its per-share earnings and book value. View historical data on Spark New Zealand and its competitors. This is 76% below median its historical median of 3.45. Over the past decade, Spark New Zealand's Graham Number has ranged from 1.76 to 4.43. According to the industry distribution chart, Spark New Zealand ranks #120 out of 191 companies in the Telecommunication Services industry, placing it in the top 62.8%.
Is Spark New Zealand's Graham Number too high?
Spark New Zealand's current Graham Number of A$0.84 is 76% below median its 10-year median of 3.45. Over the past 10 years, this metric has ranged from a low of 1.76 to a high of 4.43. Based on the distribution chart, Spark New Zealand ranks #120 out of 191 companies in the Telecommunication Services industry, which is below the industry midpoint. Overall, Spark New Zealand has a GF Score™ of 70/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Spark New Zealand's Graham Number compare to TMUS and VZ?
According to the Telecommunication Services industry distribution chart, Spark New Zealand ranks #120 out of 191 companies for Graham Number. This places Spark New Zealand in the lower half of its industry. The industry median Graham Number is 1.60. Historically, Spark New Zealand's own Graham Number has ranged from 1.76 to 4.43 over the past decade. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Graham Number for a Telecommunication Services company?
The median Graham Number among Telecommunication Services companies is 1.60, based on 191 companies in the industry. Companies in the top quartile (top 25%) have a Graham Number significantly above this median, while those in the bottom quartile fall well below. However, Graham Number should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Graham Number mean?
A high Graham Number can signal that a stock is expensive relative to its fundamentals. The Graham Number values a company based on its per-share earnings and book value. View historical data on Spark New Zealand and its competitors. For the Telecommunication Services industry, the median Graham Number is 1.60 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Spark New Zealand's current Graham Number is A$0.84, which is 76% below median its own 10-year median of 3.45. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Spark New Zealand stock overvalued right now?
Based on GuruFocus' analysis, Spark New Zealand (ASX:SPK) is currently considered Significantly Undervalued. The stock's GF Value™ is A$2.68, compared to a current price of A$1.57 — trading 41.4% below its estimated fair value. The current Graham Number is A$0.84, which is 76% below median its 10-year median of 3.45. Spark New Zealand's overall GF Score™ is 70/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Graham Number calculated?
Graham Number is calculated from a company's financial statements. For Spark New Zealand (ASX:SPK), the current Graham Number is A$0.84 as of Dec. 2025. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Spark New Zealand (ASX:SPK) Overvalued in 2026?
Based on GuruFocus' analysis, Spark New Zealand stock appears to be undervalued.
The current stock price of A$1.57 is trading 41.4% below its estimated GF Value™ of A$2.68.
GuruFocus considers Spark New Zealand to be Significantly Undervalued.
Key valuation signals for ASX:SPK:
Graham Number: A$0.84 (76% below median its 10-year median of 3.45)
GF Value™: A$2.68 vs. price of A$1.57 (41.4% below fair value)
No single metric tells the full story. See the ASX:SPK stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Spark is one of only three integrated telecommunications companies in New Zealand. It is the leading mobile network operator with low- to mid-40% subscriber and revenue share, and the dominant provider of fixed-line broadband services with a mid-30% subscriber share. It has a big position in the New Zealand corporate and wholesale telecommunications services provision space. Spark supplements its core telecommunications operations and related infrastructure with IT products and services across cloud, managed data and networks, procurement, data centers, and Internet of Things. Its operations are all based in New Zealand, except for its 41% interest in Southern Cross Submarine Cables, which has zero book value and to which Spark has no funding obligations.
70GF Score
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