COST vs. TMUS
COST (Costco Wholesale Corporation) and TMUS (T-Mobile US, Inc.) are both stocks. COST operates in Discount Stores (Consumer Defensive), while TMUS operates in Telecom Services (Communication Services). Over the past 10 years, COST returned 22.25%/yr vs 16.10%/yr for TMUS. At a 0.29 correlation, their price movements are largely independent.
Performance
COST vs. TMUS - Performance Comparison
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Returns By Period
In the year-to-date period, COST achieves a 13.35% return, which is significantly higher than TMUS's -11.22% return. Over the past 10 years, COST has outperformed TMUS with an annualized return of 22.25%, while TMUS has yielded a comparatively lower 16.10% annualized return.
COST
- 1D
- 0.30%
- 1M
- -3.37%
- YTD
- 13.35%
- 6M
- 10.14%
- 1Y
- -3.42%
- 3Y*
- 25.18%
- 5Y*
- 22.05%
- 10Y*
- 22.25%
TMUS
- 1D
- 0.19%
- 1M
- -7.35%
- YTD
- -11.22%
- 6M
- -11.83%
- 1Y
- -26.06%
- 3Y*
- 12.41%
- 5Y*
- 4.85%
- 10Y*
- 16.10%
COST vs. TMUS - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
COST Costco Wholesale Corporation | 13.35% | -5.39% | 39.62% | 49.00% | -19.05% | 51.82% | 32.67% | 45.70% | 10.60% | 22.37% |
TMUS T-Mobile US, Inc. | -11.22% | -6.58% | 39.70% | 15.02% | 20.71% | -13.99% | 71.96% | 23.28% | 0.16% | 10.43% |
Correlation
The correlation between COST and TMUS is 0.23, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.23 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.26 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.32 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.32 |
Correlation (All Time) Calculated using the full available price history since Apr 20, 2007 | 0.29 |
Fundamentals
COST:
$26.51
TMUS:
$9.41
COST:
36.77
TMUS:
18.96
COST:
2.88
TMUS:
0.29
COST:
1.11
TMUS:
2.21
COST:
$293.59B
TMUS:
$90.53B
COST:
$11.12B
TMUS:
$34.92B
COST:
$12.48B
TMUS:
$28.22B
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Return for Risk
COST vs. TMUS — Risk / Return Rank
COST
TMUS
COST vs. TMUS - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Costco Wholesale Corporation (COST) and T-Mobile US, Inc. (TMUS). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
| COST | TMUS | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.86 | ||
| Sortino ratioReturn per unit of downside risk | +1.36 | ||
| Omega ratioGain probability vs. loss probability | 0.98 | 0.83 | +0.15 |
| Calmar ratioReturn relative to maximum drawdown | -0.22 | -0.86 | +0.64 |
| Martin ratioReturn relative to average drawdown | -0.51 | -1.49 | +0.97 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| COST | TMUS | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | -0.18 | -1.05 | +0.86 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.98 | 0.20 | +0.77 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 1.02 | 0.62 | +0.40 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.59 | 0.20 | +0.39 |
Drawdowns
COST vs. TMUS - Drawdown Comparison
The maximum COST drawdown since its inception was -53.39%, smaller than the maximum TMUS drawdown of -86.29%. Use the drawdown chart below to compare losses from any high point for COST and TMUS.
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Drawdown Indicators
| COST | TMUS | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -53.39% | -86.29% | +32.90% |
Max Drawdown (1Y)Largest decline over 1 year | -15.38% | -30.37% | +14.99% |
Max Drawdown (3Y)Largest decline over 3 years | -20.74% | -33.65% | +12.91% |
Max Drawdown (5Y)Largest decline over 5 years | -31.40% | -33.65% | +2.25% |
Max Drawdown (10Y)Largest decline over 10 years | -31.40% | -33.65% | +2.25% |
Current DrawdownCurrent decline from peak | -10.93% | -33.12% | +22.19% |
Average DrawdownAverage peak-to-trough decline | -13.36% | -25.96% | +12.60% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 7.15% | 17.64% | -10.49% |
Volatility
COST vs. TMUS - Volatility Comparison
Costco Wholesale Corporation (COST) has a higher volatility of 7.71% compared to T-Mobile US, Inc. (TMUS) at 6.91%. This indicates that COST's price experiences larger fluctuations and is considered to be riskier than TMUS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| COST | TMUS | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 7.71% | 6.91% | +0.80% |
Volatility (6M)Calculated over the trailing 6-month period | 14.53% | 19.14% | -4.61% |
Volatility (1Y)Calculated over the trailing 1-year period | 18.79% | 25.04% | -6.25% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 22.71% | 23.86% | -1.15% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.95% | 26.08% | -4.13% |
Dividends
COST vs. TMUS - Dividend Comparison
COST's dividend yield for the trailing twelve months is around 0.55%, less than TMUS's 2.21% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
COST Costco Wholesale Corporation | 0.55% | 0.59% | 0.49% | 2.87% | 0.76% | 0.54% | 3.38% | 0.86% | 1.08% | 4.81% | 1.09% | 4.06% |
TMUS T-Mobile US, Inc. | 2.21% | 1.80% | 1.28% | 0.41% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Financials
COST vs. TMUS - Financials Comparison
This section allows you to compare key financial metrics between Costco Wholesale Corporation and T-Mobile US, Inc.. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
COST vs. TMUS - Profitability Comparison
COST - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported a gross profit of -17.68B and revenue of 70.53B. Therefore, the gross margin over that period was -25.1%.
TMUS - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, T-Mobile US, Inc. reported a gross profit of 0.00 and revenue of 23.11B. Therefore, the gross margin over that period was 0.0%.
COST - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported an operating income of 2.82B and revenue of 70.53B, resulting in an operating margin of 4.0%.
TMUS - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, T-Mobile US, Inc. reported an operating income of 4.50B and revenue of 23.11B, resulting in an operating margin of 19.5%.
COST - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported a net income of 2.19B and revenue of 70.53B, resulting in a net margin of 3.1%.
TMUS - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, T-Mobile US, Inc. reported a net income of 2.50B and revenue of 23.11B, resulting in a net margin of 10.8%.
Frequently Asked Questions
COST and TMUS have a correlation of 0.23, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
COST has higher volatility (7.71%) compared to TMUS (6.91%). In terms of maximum drawdown, COST dropped -53.39% vs TMUS's -86.29%.
COST currently has the higher Sharpe Ratio (-0.18 vs -1.05), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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