Spark New Zealand (ASX:SPK) 1-Year Sharpe Ratio: -2.41 (As of Jul. 20, 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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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.

ASX:SPK Spark New Zealand Ltd ASX:SPK
64 GF Score
Price A$1.56
GF Value A$2.71
Valuation Significantly Undervalued
! 8 Warning Signs
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What is Spark New Zealand 1-Year Sharpe Ratio?

Spark New Zealand ASX:SPK +1.96% 64 1-Year Sharpe Ratio is -2.41 as of Jul. 20, 2026. GuruFocus rates ASX:SPK with a GF Score™ of 64/100 and a GF Value™ of A$2.71 (Significantly Undervalued). The stock has 8 warning signs investors should review.

The 1-Year Sharpe Ratio measures the additional return that an investor receives per unit of increase in risk over the past year. As of today (2026-07-20), Spark New Zealand's 1-Year Sharpe Ratio is -2.41.

Spark New Zealand  (ASX:SPK) 1-Year Sharpe Ratio Explanation

The 1-Year Sharpe Ratio inidicates the risk-adjusted return of an investment over the past year. It is calculated as the annualized result of the average monthly excess return divided by its standard deviation over the past year. The monthly excess return is the monthly investment return minus the monthly risk-free rate (typically the 10-year Treasury Constant Maturity Rate). If the risk-free rate for a specific region is not available, U.S. data is used by default.

The greater a portfolio's Sharpe Ratio, the better its risk-adjusted performance. A negative Sharpe Ratio means the risk-free rate is greater than the portfolio’s historical or projected return, or else the portfolio's return is expected to be negative.

Spark New Zealand 1-Year Sharpe Ratio Related Terms

ASX:SPK vs TMUS, VZ, T: 1-Year Sharpe Ratio Comparison

For the Telecom Services subindustry, Spark New Zealand's 1-Year Sharpe Ratio, along with its competitors' market caps and 1-Year Sharpe 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.

Spark New Zealand 1-Year Sharpe Ratio vs Telecommunication Services Industry

For the Telecommunication Services industry and Communication Services sector, Spark New Zealand's 1-Year Sharpe Ratio distribution charts can be found below:

* The bar in red indicates where Spark New Zealand's 1-Year Sharpe Ratio falls into.


ASX:SPK
64GF Score
Spark New Zealand Ltd ASX:SPK
1-Year Sharpe Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Spark New Zealand 1-Year Sharpe Ratio Calculation

The 1-Year Sharpe Ratio measures the performance of an investment such as a stock or portfolio compared to a risk-free asset. A stock / portfolio's 1-Year Sharpe Ratio can be calculated by dividing the difference between the one-year returns of the investment and the risk-free rate, by the standard deviation of the investment returns over one year.

Frequently Asked Questions Learn more about 1-Year Sharpe Ratio →
What does a 1-Year Sharpe Ratio of -2.41 mean?
Spark New Zealand (ASX:SPK) has a 1-Year Sharpe Ratio of -2.41 as of Jul. 20, 2026. 1-Year Sharpe Ratio measures the additional return that an investor receives per unit of increase in risk. View historical data for Spark New Zealand and its competitors.
Is Spark New Zealand's 1-Year Sharpe Ratio too high?
Spark New Zealand's current 1-Year Sharpe Ratio is -2.41. Overall, Spark New Zealand has a GF Score™ of 64/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Spark New Zealand's 1-Year Sharpe Ratio compare to TMUS and VZ?
Spark New Zealand's 1-Year Sharpe Ratio of -2.41 can be compared against companies in the Telecommunication Services industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 1-Year Sharpe Ratio for a Telecommunication Services company?
A good 1-Year Sharpe Ratio depends on the Telecommunication Services industry context. However, 1-Year Sharpe Ratio 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 1-Year Sharpe Ratio mean?
A high 1-Year Sharpe Ratio can signal that a stock is expensive relative to its fundamentals. 1-Year Sharpe Ratio measures the additional return that an investor receives per unit of increase in risk. View historical data for Spark New Zealand and its competitors. Spark New Zealand's current 1-Year Sharpe Ratio is -2.41. 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$2.71, compared to a current price of A$1.56 — trading 42.4% below its estimated fair value. The current 1-Year Sharpe Ratio is -2.41. Spark New Zealand's overall GF Score™ is 64/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 1-Year Sharpe Ratio calculated?
1-Year Sharpe Ratio is calculated from a company's financial statements. For Spark New Zealand (ASX:SPK), the current 1-Year Sharpe Ratio is -2.41 as of Jul. 20, 2026. 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$1.56 is trading 42.4% below its estimated GF Value™ of A$2.71. GuruFocus considers Spark New Zealand to be Significantly Undervalued.

Key valuation signals for ASX:SPK:

  • 1-Year Sharpe Ratio: -2.41
  • GF Value™: A$2.71 vs. price of A$1.56 (42.4% below fair value)
  • GF Score™: 64/100 with 8 warning signs

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 New Zealand Business Description

Address 50 Albert Street, Spark City, Level 1, Private Bag 92028, Auckland, NTL, NZL, 1010
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.
64GF Score

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1-Year Sharpe Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

A$1.56
Price
A$2.71
GF Value