ASTC vs BSX: Correlation
Measured on weekly returns over the past three years, Astrotech Corporation (ASTC) and Boston Scientific (BSX) carry a correlation of -0.34, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASTC and BSX?
Across a 3-year window, the weekly returns of ASTC and BSX correlate at -0.34, negative, meaning they tend to move in opposite directions. The relationship has been stable: the 1-year correlation (-0.41) sits close to the 3-year figure. Stretching to 5 years gives -0.28, with an annualized covariance of -11394.8 %².
By 3-year correlation, BSX places #42 of the 47 assets tracked against ASTC. Their recent paths diverged sharply: over the last 12 months ASTC outperformed by 93.4 percentage points (+37.5% for ASTC against -55.9% for BSX). One caveat on sizing: ASTC is 43.7 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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 BSX: side by side
| ASTC (Astrotech Corporation) | BSX (Boston Scientific) | |
|---|---|---|
| 1-year return | +37.5% | -55.9% |
| 5-year return | -78.4% | +4.1% |
| Volatility (ann.) | 1206.9% | 27.6% |
| Beta vs S&P 500 | 4.81 | 0.72 |
| Max drawdown (3Y) | -87.5% | -60.6% |
| Market cap | – | $67.6B |
| P/E (trailing) | – | 19.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | ASTC | BSX |
|---|---|---|
| 2022 | -51.0% | +8.9% |
| 2023 | -15.0% | +24.9% |
| 2024 | -20.8% | +54.5% |
| 2025 | -48.5% | +6.8% |
| 2026 | +105.8% | -51.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASTC and BSX good diversifiers for each other?
By historical standards, yes. A correlation of -0.34 means the two rarely move for the same reasons.
FAQ
What is the correlation between ASTC and BSX?
The ASTC/BSX correlation stands at -0.34 on a 3-year window (1 year: -0.41, 5 years: -0.28), computed from weekly returns as of 2026-08-27.
Is BSX a good diversifier for ASTC?
By historical standards, yes. A correlation of -0.34 means the two rarely move for the same reasons.
What does a correlation of -0.34 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
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Related comparisons
Hubs: ASTC correlations · BSX correlations
