ASTC vs COST: Correlation
Measured on weekly returns over the past three years, Astrotech Corporation (ASTC) and Costco (COST) carry a correlation of -0.21, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASTC and COST?
Over the past 3 years, ASTC and COST moved with a correlation of -0.21, which is negative, meaning they tend to move in opposite directions. The past 12 months show a weaker link (-0.36) than the 3-year average (-0.21). Over 5 years the correlation is -0.13, and the annualized covariance of weekly returns is -5106.9 %².
By 3-year correlation, COST places #28 of the 47 assets tracked against ASTC. The last year tells two different stories: ASTC led by 38.5 percentage points, +37.5% for ASTC against -1.0% for COST. One caveat on sizing: ASTC is 61.0 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 COST: side by side
| ASTC (Astrotech Corporation) | COST (Costco) | |
|---|---|---|
| 1-year return | +37.5% | -1.0% |
| 5-year return | -78.4% | +116.3% |
| Volatility (ann.) | 1206.9% | 19.8% |
| Beta vs S&P 500 | 4.81 | 0.45 |
| Max drawdown (3Y) | -87.5% | -20.7% |
| Market cap | – | $414.5B |
| P/E (trailing) | – | 48.1 |
| Dividend yield | 0.00% | 0.56% |
| Sector / category | US Listed | Consumer Staples |
Year-by-year returns
| Year | ASTC | COST |
|---|---|---|
| 2022 | -51.0% | -19.0% |
| 2023 | -15.0% | +49.0% |
| 2024 | -20.8% | +39.6% |
| 2025 | -48.5% | -5.4% |
| 2026 | +105.8% | +8.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASTC and COST good diversifiers for each other?
Yes. With a correlation of -0.21, ASTC and COST have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between ASTC and COST?
As of 2026-08-27, the correlation of weekly returns between ASTC and COST is -0.21 over 3 years, -0.36 over 1 year and -0.13 over 5 years.
Is COST a good diversifier for ASTC?
Yes. With a correlation of -0.21, ASTC and COST have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.21 mean?
A reading of -0.21 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-cost.json
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Related comparisons
Hubs: ASTC correlations · COST correlations
