Stock Analysis on Net

T-Mobile US Inc. (NASDAQ:TMUS)

DuPont Analysis: Disaggregation of ROE, ROA, and Net Profit Margin 

Microsoft Excel

Two-Component Disaggregation of ROE

T-Mobile US Inc., decomposition of ROE

Microsoft Excel
ROE = ROA × Financial Leverage
Dec 31, 2021 4.38% = 1.46% × 2.99
Dec 31, 2020 4.69% = 1.53% × 3.06
Dec 31, 2019 12.05% = 3.99% × 3.02
Dec 31, 2018 11.68% = 3.99% × 2.93
Dec 31, 2017 20.11% = 6.43% × 3.13

Based on: 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31), 10-K (reporting date: 2017-12-31).

The primary reason for the decrease in return on equity ratio (ROE) over 2021 year is the decrease in profitability measured by return on assets ratio (ROA).


Three-Component Disaggregation of ROE

T-Mobile US Inc., decomposition of ROE

Microsoft Excel
ROE = Net Profit Margin × Asset Turnover × Financial Leverage
Dec 31, 2021 4.38% = 3.77% × 0.39 × 2.99
Dec 31, 2020 4.69% = 4.48% × 0.34 × 3.06
Dec 31, 2019 12.05% = 7.71% × 0.52 × 3.02
Dec 31, 2018 11.68% = 6.67% × 0.60 × 2.93
Dec 31, 2017 20.11% = 11.17% × 0.58 × 3.13

Based on: 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31), 10-K (reporting date: 2017-12-31).

The primary reason for the decrease in return on equity ratio (ROE) over 2021 year is the decrease in profitability measured by net profit margin ratio.


Five-Component Disaggregation of ROE

T-Mobile US Inc., decomposition of ROE

Microsoft Excel
ROE = Tax Burden × Interest Burden × EBIT Margin × Asset Turnover × Financial Leverage
Dec 31, 2021 4.38% = 0.90 × 0.50 × 8.38% × 0.39 × 2.99
Dec 31, 2020 4.69% = 0.80 × 0.59 × 9.62% × 0.34 × 3.06
Dec 31, 2019 12.05% = 0.75 × 0.80 × 12.75% × 0.52 × 3.02
Dec 31, 2018 11.68% = 0.74 × 0.74 × 12.18% × 0.60 × 2.93
Dec 31, 2017 20.11% = 1.43 × 0.65 × 11.90% × 0.58 × 3.13

Based on: 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31), 10-K (reporting date: 2017-12-31).

The primary reason for the decrease in return on equity ratio (ROE) over 2021 year is the decrease in effect of interest expense measured by interest burden ratio.


Two-Component Disaggregation of ROA

T-Mobile US Inc., decomposition of ROA

Microsoft Excel
ROA = Net Profit Margin × Asset Turnover
Dec 31, 2021 1.46% = 3.77% × 0.39
Dec 31, 2020 1.53% = 4.48% × 0.34
Dec 31, 2019 3.99% = 7.71% × 0.52
Dec 31, 2018 3.99% = 6.67% × 0.60
Dec 31, 2017 6.43% = 11.17% × 0.58

Based on: 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31), 10-K (reporting date: 2017-12-31).

The primary reason for the decrease in return on assets ratio (ROA) over 2021 year is the decrease in profitability measured by net profit margin ratio.


Four-Component Disaggregation of ROA

T-Mobile US Inc., decomposition of ROA

Microsoft Excel
ROA = Tax Burden × Interest Burden × EBIT Margin × Asset Turnover
Dec 31, 2021 1.46% = 0.90 × 0.50 × 8.38% × 0.39
Dec 31, 2020 1.53% = 0.80 × 0.59 × 9.62% × 0.34
Dec 31, 2019 3.99% = 0.75 × 0.80 × 12.75% × 0.52
Dec 31, 2018 3.99% = 0.74 × 0.74 × 12.18% × 0.60
Dec 31, 2017 6.43% = 1.43 × 0.65 × 11.90% × 0.58

Based on: 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31), 10-K (reporting date: 2017-12-31).

The primary reason for the decrease in return on assets ratio (ROA) over 2021 year is the decrease in effect of interest expense measured by interest burden ratio.


Disaggregation of Net Profit Margin

T-Mobile US Inc., decomposition of net profit margin ratio

Microsoft Excel
Net Profit Margin = Tax Burden × Interest Burden × EBIT Margin
Dec 31, 2021 3.77% = 0.90 × 0.50 × 8.38%
Dec 31, 2020 4.48% = 0.80 × 0.59 × 9.62%
Dec 31, 2019 7.71% = 0.75 × 0.80 × 12.75%
Dec 31, 2018 6.67% = 0.74 × 0.74 × 12.18%
Dec 31, 2017 11.17% = 1.43 × 0.65 × 11.90%

Based on: 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31), 10-K (reporting date: 2017-12-31).

The primary reason for the decrease in net profit margin ratio over 2021 year is the decrease in effect of interest expense measured by interest burden ratio.