IRTC vs. VOO
IRTC (iRhythm Technologies, Inc.) is a stock, while VOO (Vanguard S&P 500 ETF) is S&P 500 fund tracking the S&P 500 Index. Over the past 5 years, IRTC returned 18.04%/yr vs 12.83%/yr for VOO. Their 0.37 correlation means their historical movements had little consistent relationship.
Performance
IRTC vs. VOO - Performance Comparison
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Returns By Period
In the year-to-date period, IRTC achieves a -33.97% return, which is significantly lower than VOO's 10.16% return.
IRTC
- 1D
- -1.60%
- 1M
- -7.36%
- 6M
- -24.17%
- YTD
- -33.97%
- 1Y
- -28.97%
- 3Y*
- 4.10%
- 5Y*
- 18.04%
- 10Y*
- —
- ALL TIME*
- 16.31%
VOO
- 1D
- 0.71%
- 1M
- 0.26%
- 6M
- 8.58%
- YTD
- 10.16%
- 1Y
- 21.58%
- 3Y*
- 19.42%
- 5Y*
- 12.83%
- 10Y*
- 15.14%
- ALL TIME*
- 14.78%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $54.70M | $63.37M | $64.57M | |
| $3.82B | $3.78B | $5.44B |
IRTC vs. VOO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
IRTC iRhythm Technologies, Inc. | -33.97% | 96.78% | -15.76% | 14.27% | -20.41% | -50.39% | 248.38% | -2.00% | 23.96% | 86.83% |
VOO Vanguard S&P 500 ETF | 10.16% | 17.82% | 24.98% | 26.32% | -18.17% | 28.79% | 18.32% | 31.37% | -4.50% | 21.77% |
Correlation
The correlation between IRTC and VOO is 0.16, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.16 |
Correlation (3Y) Balances recent behavior with more history. | 0.31 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.40 |
Correlation (All Time) Calculated using the full available price history since Oct 20, 2016 | 0.37 |
Over the past year, the correlation between IRTC and VOO has dropped to 0.16 - well below their long-term average of 0.37, suggesting their price drivers have been diverging.
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Return for Risk
IRTC vs. VOO — Risk / Return Rank
IRTC
VOO
IRTC vs. VOO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iRhythm Technologies, Inc. (IRTC) and Vanguard S&P 500 ETF (VOO). 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.
| IRTC | VOO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.90 | ||
| Sortino ratioReturn per unit of downside risk | -2.40 | ||
| Omega ratioGain probability vs. loss probability | 0.97 | 1.28 | -0.30 |
| Calmar ratioReturn relative to maximum drawdown | -0.36 | 2.21 | -2.57 |
| Martin ratioReturn relative to average drawdown | -0.63 | 9.44 | -10.07 |
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Drawdowns
IRTC vs. VOO - Drawdown Comparison
The maximum IRTC drawdown since its inception was -84.39%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for IRTC and VOO.
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Drawdown Indicators
| IRTC | VOO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -84.39% | -33.99% | -50.40% |
Max Drawdown (1Y)Largest decline over 1 year | -46.21% | -8.90% | -37.31% |
Max Drawdown (3Y)Largest decline over 3 years | -53.83% | -18.69% | -35.14% |
Max Drawdown (5Y)Largest decline over 5 years | -66.03% | -24.52% | -41.51% |
Max Drawdown (10Y)Largest decline over 10 years | — | -33.99% | — |
Current DrawdownCurrent decline from peak | -56.35% | -1.38% | -54.97% |
Average DrawdownAverage peak-to-trough decline | -37.37% | -3.67% | -33.70% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 26.08% | 2.08% | +24.00% |
Volatility
IRTC vs. VOO - Volatility Comparison
iRhythm Technologies, Inc. (IRTC) has a higher volatility of 13.19% compared to Vanguard S&P 500 ETF (VOO) at 3.54%. This indicates that IRTC's price experiences larger fluctuations and is considered to be riskier than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IRTC | VOO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 13.19% | 3.54% | +9.65% |
Volatility (6M)Calculated over the trailing 6-month period | 32.54% | 10.10% | +22.44% |
Volatility (1Y)Calculated over the trailing 1-year period | 44.95% | 12.82% | +32.13% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 63.58% | 16.93% | +46.65% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 61.56% | 18.01% | +43.55% |
Dividends
IRTC vs. VOO - Dividend Comparison
IRTC has not paid dividends to shareholders, while VOO's dividend yield for the trailing twelve months is around 1.07%.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IRTC iRhythm Technologies, Inc. | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
VOO Vanguard S&P 500 ETF | 1.07% | 1.13% | 1.24% | 1.46% | 1.69% | 1.25% | 1.54% | 1.88% | 2.06% | 1.78% | 2.02% | 2.10% |
Frequently Asked Questions
IRTC and VOO have a correlation of 0.16, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IRTC has higher volatility (13.19%) compared to VOO (3.54%). In terms of maximum drawdown, IRTC dropped -84.39% vs VOO's -33.99%.
VOO currently has the higher Sharpe Ratio (1.53 vs -0.37), 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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