TNDM vs. DXCM
TNDM (Tandem Diabetes Care, Inc.) and DXCM (DexCom, Inc.) are both stocks. Both are in the Healthcare sector — TNDM in Medical Devices, DXCM in Diagnostics & Research. Over the past 10 years, TNDM returned -13.09%/yr vs 15.73%/yr for DXCM. At a 0.43 correlation, their price movements are largely independent.
Performance
TNDM vs. DXCM - Performance Comparison
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Returns By Period
In the year-to-date period, TNDM achieves a -17.97% return, which is significantly lower than DXCM's 9.64% return. Over the past 10 years, TNDM has underperformed DXCM with an annualized return of -13.09%, while DXCM has yielded a comparatively higher 15.73% annualized return.
TNDM
- 1D
- -3.06%
- 1M
- -9.26%
- YTD
- -17.97%
- 6M
- -9.53%
- 1Y
- -12.60%
- 3Y*
- -10.05%
- 5Y*
- -26.84%
- 10Y*
- -13.09%
DXCM
- 1D
- -0.93%
- 1M
- 21.20%
- YTD
- 9.64%
- 6M
- 12.21%
- 1Y
- -16.15%
- 3Y*
- -15.95%
- 5Y*
- -5.34%
- 10Y*
- 15.73%
TNDM vs. DXCM - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TNDM Tandem Diabetes Care, Inc. | -17.97% | -38.98% | 21.77% | -34.19% | -70.14% | 57.32% | 60.51% | 56.99% | 1,508.90% | -89.02% |
DXCM DexCom, Inc. | 9.64% | -14.66% | -37.33% | 9.58% | -15.64% | 45.23% | 69.02% | 82.59% | 108.75% | -3.87% |
Correlation
The correlation between TNDM and DXCM is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.34 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.43 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.50 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.47 |
Correlation (All Time) Calculated using the full available price history since Nov 15, 2013 | 0.43 |
The correlation between TNDM and DXCM shifts across timeframes, from 0.34 (1 year) to 0.50 (5 years), reflecting how their relationship changes across market environments.
Fundamentals
TNDM:
$1.23B
DXCM:
$28.64B
TNDM:
-$1.39
DXCM:
$2.31
TNDM:
1.19
DXCM:
6.07
TNDM:
9.31
DXCM:
9.69
TNDM:
$1.03B
DXCM:
$4.82B
TNDM:
$564.40M
DXCM:
$2.96B
TNDM:
-$75.59M
DXCM:
$1.37B
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Return for Risk
TNDM vs. DXCM — Risk / Return Rank
TNDM
DXCM
TNDM vs. DXCM - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Tandem Diabetes Care, Inc. (TNDM) and DexCom, Inc. (DXCM). 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.
| TNDM | DXCM | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.24 | ||
| Sortino ratioReturn per unit of downside risk | +0.65 | ||
| Omega ratioGain probability vs. loss probability | 1.04 | 0.96 | +0.08 |
| Calmar ratioReturn relative to maximum drawdown | -0.23 | -0.42 | +0.19 |
| Martin ratioReturn relative to average drawdown | -0.42 | -0.72 | +0.29 |
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
| TNDM | DXCM | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | -0.16 | -0.40 | +0.24 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | -0.40 | -0.11 | -0.28 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | -0.17 | 0.33 | -0.49 |
Sharpe Ratio (All Time)Calculated using the full available price history | -0.23 | 0.30 | -0.54 |
Drawdowns
TNDM vs. DXCM - Drawdown Comparison
The maximum TNDM drawdown since its inception was -99.25%, roughly equal to the maximum DXCM drawdown of -94.61%. Use the drawdown chart below to compare losses from any high point for TNDM and DXCM.
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Drawdown Indicators
| TNDM | DXCM | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -99.25% | -94.61% | -4.64% |
Max Drawdown (1Y)Largest decline over 1 year | -54.92% | -38.75% | -16.17% |
Max Drawdown (3Y)Largest decline over 3 years | -81.07% | -60.95% | -20.12% |
Max Drawdown (5Y)Largest decline over 5 years | -93.40% | -66.32% | -27.08% |
Max Drawdown (10Y)Largest decline over 10 years | -97.44% | -66.32% | -31.12% |
Current DrawdownCurrent decline from peak | -93.99% | -55.31% | -38.68% |
Average DrawdownAverage peak-to-trough decline | -77.17% | -35.99% | -41.18% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 29.91% | 22.63% | +7.28% |
Volatility
TNDM vs. DXCM - Volatility Comparison
Tandem Diabetes Care, Inc. (TNDM) has a higher volatility of 31.66% compared to DexCom, Inc. (DXCM) at 13.22%. This indicates that TNDM's price experiences larger fluctuations and is considered to be riskier than DXCM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TNDM | DXCM | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 31.66% | 13.22% | +18.44% |
Volatility (6M)Calculated over the trailing 6-month period | 56.15% | 24.61% | +31.54% |
Volatility (1Y)Calculated over the trailing 1-year period | 78.80% | 40.26% | +38.54% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 67.54% | 46.91% | +20.63% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 77.78% | 48.43% | +29.35% |
Dividends
TNDM vs. DXCM - Dividend Comparison
Neither TNDM nor DXCM has paid dividends to shareholders.
Financials
TNDM vs. DXCM - Financials Comparison
This section allows you to compare key financial metrics between Tandem Diabetes Care, Inc. and DexCom, 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
TNDM vs. DXCM - Profitability Comparison
TNDM - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Tandem Diabetes Care, Inc. reported a gross profit of 136.79M and revenue of 247.22M. Therefore, the gross margin over that period was 55.3%.
DXCM - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, DexCom, Inc. reported a gross profit of 750.30M and revenue of 1.19B. Therefore, the gross margin over that period was 63.0%.
TNDM - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Tandem Diabetes Care, Inc. reported an operating income of -17.43M and revenue of 247.22M, resulting in an operating margin of -7.1%.
DXCM - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, DexCom, Inc. reported an operating income of 255.30M and revenue of 1.19B, resulting in an operating margin of 21.4%.
TNDM - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Tandem Diabetes Care, Inc. reported a net income of -20.39M and revenue of 247.22M, resulting in a net margin of -8.3%.
DXCM - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, DexCom, Inc. reported a net income of 199.50M and revenue of 1.19B, resulting in a net margin of 16.7%.
Frequently Asked Questions
TNDM and DXCM have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
TNDM has higher volatility (31.66%) compared to DXCM (13.22%). In terms of maximum drawdown, TNDM dropped -99.25% vs DXCM's -94.61%.
TNDM currently has the higher Sharpe Ratio (-0.16 vs -0.40), 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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