INSP vs. ^SP500TR
INSP (Inspire Medical Systems, Inc.) is a stock, while ^SP500TR (S&P 500 Total Return) is an index. Over the past 5 years, INSP returned -22.80%/yr vs 12.86%/yr for ^SP500TR. Their 0.42 correlation means their historical movements had little consistent relationship.
Performance
INSP vs. ^SP500TR - Performance Comparison
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Returns By Period
In the year-to-date period, INSP achieves a -45.56% return, which is significantly lower than ^SP500TR's 10.14% return.
INSP
- 1D
- 0.38%
- 1M
- 6.94%
- 6M
- -33.74%
- YTD
- -45.56%
- 1Y
- -60.18%
- 3Y*
- -44.32%
- 5Y*
- -22.80%
- 10Y*
- —
- ALL TIME*
- 9.10%
^SP500TR
- 1D
- 0.71%
- 1M
- 0.14%
- 6M
- 8.56%
- YTD
- 10.14%
- 1Y
- 21.50%
- 3Y*
- 19.43%
- 5Y*
- 12.86%
- 10Y*
- 15.17%
- ALL TIME*
- 11.45%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
^SP500TR S&P 500 Total Return | $0.00 | $0.00 | $0.00 |
| $40.00M | $44.43M | $52.50M |
INSP vs. ^SP500TR - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
INSP Inspire Medical Systems, Inc. | -45.56% | -50.25% | -8.87% | -19.24% | 9.48% | 22.31% | 153.46% | 75.64% | 72.52% |
^SP500TR S&P 500 Total Return | 10.14% | 17.88% | 25.02% | 26.29% | -18.11% | 28.71% | 18.40% | 31.49% | -3.57% |
Correlation
The correlation between INSP and ^SP500TR is 0.19, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.19 |
Correlation (3Y) Balances recent behavior with more history. | 0.31 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.41 |
Correlation (All Time) Calculated using the full available price history since May 3, 2018 | 0.42 |
Over the past year, the correlation between INSP and ^SP500TR has dropped to 0.19 - well below their long-term average of 0.42, suggesting their price drivers have been diverging.
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Return for Risk
INSP vs. ^SP500TR — Risk / Return Rank
INSP
^SP500TR
INSP vs. ^SP500TR - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Inspire Medical Systems, Inc. (INSP) and S&P 500 Total Return (^SP500TR). 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.
| INSP | ^SP500TR | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -2.32 | ||
| Sortino ratioReturn per unit of downside risk | -3.20 | ||
| Omega ratioGain probability vs. loss probability | 0.85 | 1.27 | -0.43 |
| Calmar ratioReturn relative to maximum drawdown | -0.83 | 2.21 | -3.04 |
| Martin ratioReturn relative to average drawdown | -1.17 | 9.49 | -10.66 |
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Drawdowns
INSP vs. ^SP500TR - Drawdown Comparison
The maximum INSP drawdown since its inception was -87.72%, which is greater than ^SP500TR's maximum drawdown of -55.25%. Use the drawdown chart below to compare losses from any high point for INSP and ^SP500TR.
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Drawdown Indicators
| INSP | ^SP500TR | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -87.72% | -55.25% | -32.47% |
Max Drawdown (1Y)Largest decline over 1 year | -72.19% | -8.89% | -63.30% |
Max Drawdown (3Y)Largest decline over 3 years | -85.55% | -18.75% | -66.80% |
Max Drawdown (5Y)Largest decline over 5 years | -87.72% | -24.49% | -63.23% |
Max Drawdown (10Y)Largest decline over 10 years | — | -33.79% | — |
Current DrawdownCurrent decline from peak | -84.60% | -1.41% | -83.19% |
Average DrawdownAverage peak-to-trough decline | -28.68% | -8.14% | -20.54% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 51.14% | 2.07% | +49.07% |
Volatility
INSP vs. ^SP500TR - Volatility Comparison
Inspire Medical Systems, Inc. (INSP) has a higher volatility of 13.40% compared to S&P 500 Total Return (^SP500TR) at 3.52%. This indicates that INSP's price experiences larger fluctuations and is considered to be riskier than ^SP500TR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| INSP | ^SP500TR | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 13.40% | 3.52% | +9.88% |
Volatility (6M)Calculated over the trailing 6-month period | 39.42% | 10.11% | +29.31% |
Volatility (1Y)Calculated over the trailing 1-year period | 75.49% | 12.87% | +62.62% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 60.26% | 17.01% | +43.25% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 60.30% | 18.07% | +42.23% |
Frequently Asked Questions
INSP and ^SP500TR have a correlation of 0.19, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
INSP has higher volatility (13.40%) compared to ^SP500TR (3.52%). In terms of maximum drawdown, INSP dropped -87.72% vs ^SP500TR's -55.25%.
^SP500TR currently has the higher Sharpe Ratio (1.53 vs -0.79), 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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