ACA vs BLBD: Correlation
Arcosa, Inc. (ACA) and Blue Bird Corporation (BLBD) show a moderate relationship: their 3-year correlation of weekly returns is 0.47.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACA and BLBD?
Over the past 3 years, ACA and BLBD moved with a correlation of 0.47, which is moderate. The past 12 months show a weaker link (0.35) than the 3-year average (0.47). Over 5 years the correlation is 0.40, and the annualized covariance of weekly returns is 750.0 %².
Within ACA's tracked universe of 23 assets, BLBD comes in at #16 by 3-year correlation. Correlation aside, the last 12 months split them widely, with ACA ahead by 44.0 points (+47.0% versus +3.0%). Risk is not evenly split, since BLBD carries 1.6 times the volatility of the other side.
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.
ACA vs BLBD: side by side
| ACA (Arcosa, Inc.) | BLBD (Blue Bird Corporation) | |
|---|---|---|
| 1-year return | +47.0% | +3.0% |
| 5-year return | +186.5% | +182.6% |
| Volatility (ann.) | 31.9% | 49.8% |
| Beta vs S&P 500 | 1.23 | 0.95 |
| Max drawdown (3Y) | -36.6% | -45.9% |
| Market cap | $7.1B | $1.9B |
| P/E (trailing) | 32.5 | 7.2 |
| Dividend yield | 0.14% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACA | BLBD |
|---|---|---|
| 2022 | +3.5% | -31.5% |
| 2023 | +52.5% | +151.7% |
| 2024 | +17.3% | +43.3% |
| 2025 | +10.2% | +21.7% |
| 2026 | +37.0% | +27.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACA and BLBD good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.47 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between ACA and BLBD?
Using weekly returns as of 2026-08-27: 0.47 over 3 years, with 0.35 over the last year and 0.40 over 5 years.
Is BLBD a good diversifier for ACA?
Yes, to a useful degree: a correlation of 0.47 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.47 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.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/aca-vs-blbd.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/aca-vs-blbd/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: ACA correlations · BLBD correlations
