RMD vs. COST
RMD (ResMed Inc.) and COST (Costco Wholesale Corporation) are both stocks. RMD operates in Medical Instruments & Supplies (Healthcare), while COST operates in Discount Stores (Consumer Defensive). Over the past 10 years, RMD returned 13.85%/yr vs 22.27%/yr for COST. At a 0.25 correlation, their price movements are largely independent.
Performance
RMD vs. COST - Performance Comparison
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Returns By Period
In the year-to-date period, RMD achieves a -18.71% return, which is significantly lower than COST's 14.24% return. Over the past 10 years, RMD has underperformed COST with an annualized return of 13.85%, while COST has yielded a comparatively higher 22.27% annualized return.
RMD
- 1D
- 1.24%
- 1M
- -3.46%
- YTD
- -18.71%
- 6M
- -22.38%
- 1Y
- -22.01%
- 3Y*
- -2.26%
- 5Y*
- -1.41%
- 10Y*
- 13.85%
COST
- 1D
- 0.68%
- 1M
- -4.91%
- YTD
- 14.24%
- 6M
- 11.38%
- 1Y
- -1.48%
- 3Y*
- 25.12%
- 5Y*
- 22.12%
- 10Y*
- 22.27%
RMD vs. COST - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
RMD ResMed Inc. | -18.71% | 6.26% | 34.18% | -16.55% | -19.47% | 23.41% | 38.33% | 37.85% | 36.38% | 39.06% |
COST Costco Wholesale Corporation | 14.24% | -5.39% | 39.62% | 49.00% | -19.05% | 51.82% | 32.67% | 45.70% | 10.60% | 22.37% |
Correlation
The correlation between RMD and COST is 0.08, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.08 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.26 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.35 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.34 |
Correlation (All Time) Calculated using the full available price history since Jun 2, 1995 | 0.25 |
The correlation between RMD and COST shifts across timeframes, from 0.08 (1 year) to 0.35 (5 years), reflecting how their relationship changes across market environments.
Fundamentals
RMD:
$13.78
COST:
$26.51
RMD:
14.14
COST:
37.06
RMD:
0.44
COST:
2.90
RMD:
3.88
COST:
1.12
RMD:
$5.54B
COST:
$293.59B
RMD:
$3.42B
COST:
$11.12B
RMD:
$2.10B
COST:
$12.48B
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Return for Risk
RMD vs. COST — Risk / Return Rank
RMD
COST
RMD vs. COST - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for ResMed Inc. (RMD) and Costco Wholesale Corporation (COST). 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.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| RMD | COST | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.84 | ||
| Sortino ratioReturn per unit of downside risk | -1.21 | ||
| Omega ratioGain probability vs. loss probability | 0.86 | 1.00 | -0.14 |
| Calmar ratioReturn relative to maximum drawdown | -0.59 | -0.10 | -0.49 |
| Martin ratioReturn relative to average drawdown | -1.34 | -0.22 | -1.11 |
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Drawdowns
RMD vs. COST - Drawdown Comparison
The maximum RMD drawdown since its inception was -61.61%, which is greater than COST's maximum drawdown of -53.39%. Use the drawdown chart below to compare losses from any high point for RMD and COST.
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Drawdown Indicators
| RMD | COST | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -61.61% | -53.39% | -8.22% |
Max Drawdown (1Y)Largest decline over 1 year | -37.28% | -15.14% | -22.14% |
Max Drawdown (3Y)Largest decline over 3 years | -40.09% | -20.74% | -19.35% |
Max Drawdown (5Y)Largest decline over 5 years | -53.99% | -31.40% | -22.59% |
Max Drawdown (10Y)Largest decline over 10 years | -53.99% | -31.40% | -22.59% |
Current DrawdownCurrent decline from peak | -33.18% | -10.23% | -22.95% |
Average DrawdownAverage peak-to-trough decline | -16.00% | -13.36% | -2.64% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 16.49% | 6.67% | +9.82% |
Volatility
RMD vs. COST - Volatility Comparison
ResMed Inc. (RMD) has a higher volatility of 9.81% compared to Costco Wholesale Corporation (COST) at 7.44%. This indicates that RMD's price experiences larger fluctuations and is considered to be riskier than COST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| RMD | COST | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 9.81% | 7.44% | +2.37% |
Volatility (6M)Calculated over the trailing 6-month period | 19.30% | 14.53% | +4.77% |
Volatility (1Y)Calculated over the trailing 1-year period | 24.09% | 18.80% | +5.29% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 31.07% | 22.72% | +8.35% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 31.54% | 21.95% | +9.59% |
Dividends
RMD vs. COST - Dividend Comparison
RMD's dividend yield for the trailing twelve months is around 1.23%, more than COST's 0.55% 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% |
RMD ResMed Inc. | 1.23% | 0.94% | 0.88% | 1.07% | 0.83% | 0.62% | 0.73% | 0.98% | 1.26% | 1.61% | 2.03% | 2.16% |
Financials
RMD vs. COST - Financials Comparison
This section allows you to compare key financial metrics between ResMed Inc. and Costco Wholesale Corporation. 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
RMD vs. COST - Profitability Comparison
RMD - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, ResMed Inc. reported a gross profit of 890.98M and revenue of 1.43B. Therefore, the gross margin over that period was 62.3%.
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%.
RMD - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, ResMed Inc. reported an operating income of 499.81M and revenue of 1.43B, resulting in an operating margin of 34.9%.
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%.
RMD - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, ResMed Inc. reported a net income of 398.73M and revenue of 1.43B, resulting in a net margin of 27.9%.
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%.
Frequently Asked Questions
RMD and COST have a correlation of 0.08, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
RMD has higher volatility (9.81%) compared to COST (7.44%). In terms of maximum drawdown, RMD dropped -61.61% vs COST's -53.39%.
COST currently has the higher Sharpe Ratio (-0.08 vs -0.92), 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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