ASTC vs RMD: Correlation
Astrotech Corporation (ASTC) and ResMed (RMD) show a negative relationship: their 3-year correlation of weekly returns is -0.16.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASTC and RMD?
Across a 3-year window, the weekly returns of ASTC and RMD correlate at -0.16, negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.32 versus -0.16 over 3 years. Stretching to 5 years gives -0.11, with an annualized covariance of -6027.7 %².
Within ASTC's tracked universe of 47 assets, RMD comes in at #24 by 3-year correlation. The last year tells two different stories: ASTC led by 53.0 percentage points, +37.5% for ASTC against -15.5% for RMD. Note the risk asymmetry: ASTC runs 38.7 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
ASTC vs RMD: side by side
| ASTC (Astrotech Corporation) | RMD (ResMed) | |
|---|---|---|
| 1-year return | +37.5% | -15.5% |
| 5-year return | -78.4% | -14.6% |
| Volatility (ann.) | 1206.9% | 31.2% |
| Beta vs S&P 500 | 4.81 | 0.79 |
| Max drawdown (3Y) | -87.5% | -37.3% |
| Market cap | – | $34.0B |
| P/E (trailing) | – | 22.6 |
| Dividend yield | 0.00% | 1.02% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | ASTC | RMD |
|---|---|---|
| 2022 | -51.0% | -19.5% |
| 2023 | -15.0% | -16.5% |
| 2024 | -20.8% | +34.2% |
| 2025 | -48.5% | +6.3% |
| 2026 | +105.8% | -1.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASTC and RMD good diversifiers for each other?
By historical standards, yes. A correlation of -0.16 means the two rarely move for the same reasons.
FAQ
What is the correlation between ASTC and RMD?
As of 2026-08-27, the correlation of weekly returns between ASTC and RMD is -0.16 over 3 years, -0.32 over 1 year and -0.11 over 5 years.
Is RMD a good diversifier for ASTC?
By historical standards, yes. A correlation of -0.16 means the two rarely move for the same reasons.
What does a correlation of -0.16 mean?
A reading of -0.16 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/astc-vs-rmd.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/astc-vs-rmd/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ASTC correlations · RMD correlations
