Volatility is a statistical measure of the dispersion of returns for a given security or market index, it shows how the price swings around its mean. The volatility here is measured as the annualized standard deviation between monthly returns from the security over the past year. In most cases, the higher the volatility, the riskier the security.
As of today (2026-06-24), T-Mobile US's Volatility is 20.63%.
T-Mobile US (WBO:TMUS) Volatility Explanation
Volatility is a statistical measure of the dispersion of returns for a given security or market index. It’s often measured as standard deviation or variance of historical returns over a certain period. The volatility here is measured as the annualized standard deviation between monthly returns from the security over the past year.
Volatility reflects the uncertainty or risk of a security’s value. Generally speaking, a higher volatility suggests a higher risk, because it implies a wider fluctuation around average price. This means the price of the security can change dramatically in either direction within a short period. Conversely, a lower volatility means that the security's price is more steady, which suggests a lower risk.
Another measurement of relative volatility is Beta. Beta is a measure of systematic risk of a security or a portfolio in comparison to the market as a whole. Beta is usually compared to 1. A beta of greater than 1 indicates that the security's price will be more volatile than the market.
T-Mobile US Volatility Related Terms
WBO:TMUS vs VZ, T, CMCSA: Volatility Comparison
For the Telecom Services subindustry, T-Mobile US's Volatility, along with its competitors' market caps and Volatility 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.
T-Mobile US Volatility vs Telecommunication Services Industry
For the Telecommunication Services industry and Communication Services sector, T-Mobile US's Volatility distribution charts can be found below:
* The bar in red indicates where T-Mobile US's Volatility falls into.
The annualized volatility is calculated as following:
σA
=
σM
*
√12
=
√ 1/(n-1) ∑(Ri - R')^2
*
√12
Where: σM is the monthly volatility, n is the number of months in the period, Ri is the security's historical monthly returns and R' is the arithmetic mean of monthly returns.
* 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.
T-Mobile US (WBO:TMUS) has a Volatility of 20.63% as of Jun. 24, 2026. Volatility is measured as the annualized standard deviation between monthly returns from the security over the past year. View historical data on T-Mobile US and its competitors.
Is T-Mobile US's Volatility too high?
T-Mobile US's current Volatility is 20.63%. Overall, T-Mobile US has a GF Score™ of 83/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does T-Mobile US's Volatility compare to VZ and T?
T-Mobile US's Volatility of 20.63% 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 Volatility for a Telecommunication Services company?
A good Volatility depends on the Telecommunication Services industry context. However, Volatility 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 Volatility mean?
A high Volatility can signal that a stock is expensive relative to its fundamentals. Volatility is measured as the annualized standard deviation between monthly returns from the security over the past year. View historical data on T-Mobile US and its competitors. T-Mobile US's current Volatility is 20.63%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is T-Mobile US stock overvalued right now?
Based on GuruFocus' analysis, T-Mobile US (WBO:TMUS) is currently considered Modestly Undervalued. The stock's GF Value™ is €195.65, compared to a current price of €160.74 — trading 17.8% below its estimated fair value. The current Volatility is 20.63%. T-Mobile US's overall GF Score™ is 83/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Volatility calculated?
Volatility is calculated from a company's financial statements. For T-Mobile US (WBO:TMUS), the current Volatility is 20.63% as of Jun. 24, 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 T-Mobile US (WBO:TMUS) Overvalued in 2026?
Based on GuruFocus' analysis, T-Mobile US stock appears to be undervalued.
The current stock price of €160.74 is trading 17.8% below its estimated GF Value™ of €195.65.
GuruFocus considers T-Mobile US to be Modestly Undervalued.
Key valuation signals for WBO:TMUS:
Volatility: 20.63%
GF Value™: €195.65 vs. price of €160.74 (17.8% below fair value)
No single metric tells the full story. See the WBO:TMUS stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Deutsche Telekom merged its T-Mobile USA unit with prepaid specialist MetroPCS in 2013, and that firm merged with Sprint in 2020, creating the second-largest wireless carrier in the US. T-Mobile now serves about 86 million postpaid and 26 million prepaid phone customers, equal to around 30% of the US retail wireless market. The firm entered the fixed-wireless broadband market aggressively in 2021 and now serves 8 million residential and business customers with its wireless network. It also serves 1 million fiber broadband customers through joint ventures with fiber network owners. T-Mobile owns a stake in these firms, which provide wholesale access to their networks. In addition, T-Mobile provides wholesale services to wireless resellers.
83GF Score
Get the complete analysis for WBO:TMUS
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